JPWO2008090899A1 - Acoustic adjustment device, acoustic device, and voice editing program - Google Patents

Abstract

Provided is an acoustic adjustment device capable of easily adjusting sound quality according to listener's preference and various uses. The acoustic adjustment device of the present invention performs the filtering process according to the set filter coefficient on the input audio signal and outputs the FIR filter (11), and the amplitude characteristic and phase characteristic of the FIR filter (11). In order to change, the operation input unit (13) for specifying the amplitude characteristic and the phase characteristic to be realized after the change, and the filter coefficient corresponding to the amplitude characteristic and the phase characteristic specified by the operation input unit (13) are FIR filters And an arithmetic control unit (12) set in (11).

Description

  The present invention relates to an acoustic adjustment device that adjusts frequency characteristics (amplitude frequency characteristics and phase frequency characteristics) of an audio signal, an audio device that can adjust the frequency characteristics of the audio signal, and an audio for performing audio data editing processing. Regarding editing programs.

  Conventionally, some acoustic devices use an FIR (finite impulse response) filter in order to equalize the amplitude frequency characteristic and phase frequency characteristic of the entire system so as to become a flat linear shape. The phase frequency characteristic is generally referred to as a phase characteristic or the like, and refers to a characteristic expressed by indicating the frequency on the horizontal axis and the phase on the vertical axis. The amplitude frequency characteristic is generally referred to as a frequency characteristic in the audio industry, and refers to a characteristic represented by indicating the frequency on the horizontal axis and the amplitude on the vertical axis.

  For example, Patent Document 1 describes a configuration in which an FIR filter is used and coefficients of the FIR filter are set so that the phase frequency characteristic of the sound output from a speaker has linearity.

On the other hand, Patent Document 2 has a configuration in which at least three stages of 180-degree phase shift circuits configured using operational amplifiers are connected in cascade, and the phase of the audio input signal corresponds to a logarithmic increase in frequency in the audible frequency range. A sound quality improvement circuit having a phase frequency characteristic for generating a phase delay in the range of 450 to 600 degrees in the range of audible frequencies by gradually delaying the sound is shown.
JP 2000-91865 A JP 2005-143093 A

  In the technique disclosed in Patent Document 1, the phase frequency characteristic of the sound output from the speaker is set to have linearity. Further, the technique of Patent Document 2 is configured to delay the phase with a linear gradient in response to a logarithmic increase in frequency. In this way, these prior art, since whether to what phase frequency characteristics in advance is defined, it is difficult to adjust the sound quality according to such the listener's preferences and various applications.

  The present invention has been made in order to solve the above-described problems. It is a first object of the present invention to provide an acoustic adjustment apparatus capable of easily adjusting the sound quality according to the listener's preference and various uses. The purpose is.

  A second object of the present invention is to provide an audio device capable of easily adjusting the sound quality according to the listener's preference and various uses.

  It is a third object of the present invention to provide an audio editing program capable of creating an audio file as a sound source in which the sound quality is adjusted according to the listener's preference and various uses. Yes.

In order to achieve the first object, the acoustic adjustment device of the present invention performs a filter process according to a set filter coefficient on an input audio signal and outputs the finite impulse response filter (hereinafter, “ FIR filter ”), a change characteristic designating unit for designating the phase frequency characteristic of the FIR filter to be realized after the change in order to change the phase frequency characteristic of the FIR filter, and the change characteristic designating unit Filter coefficient setting means for setting a filter coefficient corresponding to the phase frequency characteristic to be set in the FIR filter.

  According to this configuration, for example, when an audio signal output from the FIR filter is output as a loud sound from a speaker via an amplifier or the like, the FIR filter changes the phase frequency characteristic to the amplitude frequency characteristic by setting the filter coefficient. Since the phase frequency characteristic of the FIR filter can be set independently of the amplitude frequency characteristic, the sound quality can be easily adjusted according to the listener's preference and various uses. be able to. In particular, it is possible to adjust the sound quality by delaying or advancing the phase of a certain frequency.

  Further, the change characteristic designating means includes a display means for displaying on the screen a phase adjusting operator for setting a phase corresponding to a display position for each of a plurality of predetermined frequencies, and a screen of the display means. Operating means for changing the display position of the phase adjustment operator displayed on the display, and the phase frequency characteristics of the FIR filter according to the display position of the phase adjustment operator changed by the operation means The filter coefficient setting means obtains phase characteristic information which is information representing the phase frequency characteristic based on the phase frequency characteristic designated by the change characteristic designation means, and then the phase characteristic A filter coefficient may be calculated based on the information and set in the FIR filter.

  According to this configuration, the operator can easily set the desired phase frequency characteristics of the FIR filter on the screen of the display means.

Further, the change characteristic designating unit has a phase adjustment operator for setting a phase corresponding to an operation position for each of a plurality of predetermined frequencies, depending on the operation position of the phase adjustment operator. The filter coefficient setting means is configured to designate phase characteristic information which is information representing the phase frequency characteristic based on the phase frequency characteristic designated by the change characteristic designation means. After obtaining, a filter coefficient may be calculated based on the phase characteristic information and set in the FIR filter.

According to this configuration, the operator can easily set the desired phase frequency characteristic of the FIR filter by operating the operator.

The change characteristic designating means includes display means for displaying the phase frequency characteristic of the FIR filter on a screen, and operation means for changing the phase frequency characteristic displayed in advance on the screen of the display means. The phase frequency characteristic of the FIR filter is designated by the phase frequency characteristic changed by the operation means, and the filter coefficient setting means is based on the phase frequency characteristic designated by the change characteristic designation means. After obtaining the phase characteristic information which is information representing the phase frequency characteristic, a filter coefficient may be calculated based on the phase characteristic information and set in the FIR filter.

  According to this configuration, the operator can easily set the desired phase frequency characteristics of the FIR filter on the screen of the display means.

  In addition, the change characteristic designating unit includes a display unit that displays a phase characteristic display region on a screen, and an operation unit that draws a phase frequency characteristic curve in the phase characteristic display region of the screen of the display unit, The phase frequency characteristic of the FIR filter is designated by a phase frequency characteristic curve drawn by the operation means, and the filter coefficient setting means is based on the phase frequency characteristic designated by the change characteristic designation means. After obtaining phase characteristic information which is information representing phase frequency characteristics, a filter coefficient may be calculated based on the phase characteristic information and set in the FIR filter.

  According to this configuration, the operator can easily set the desired phase frequency characteristics of the FIR filter on the screen of the display means.

  The change characteristic designating unit has an operation unit for selecting one phase frequency characteristic from among a plurality of phase frequency characteristics, and the phase frequency of the FIR filter is determined by the phase frequency characteristic selected by the operation unit. The filter coefficient setting means is configured to designate a characteristic, and the filter coefficient setting means is a plurality of phase characteristics which are information representing each corresponding to each of the phase frequency characteristics of the plurality of FIR filters that can be designated by the change characteristic designation means Storage means for storing information in advance, and after obtaining phase characteristic information corresponding to the phase frequency characteristic designated by the change characteristic designation means from the storage means, a filter coefficient is obtained based on the phase characteristic information. It may be configured to calculate and set the FIR filter.

  According to this configuration, the operator can easily set only by performing an operation of selecting a desired phase frequency characteristic of the FIR filter.

In this case, the storage means of the filter coefficient setting means may be configured to rewrite the stored phase characteristic information.

Thereby, the phase frequency characteristic of the selectable FIR filter can be changed.

The change characteristic designating unit has an operation unit for selecting one phase frequency characteristic from among a plurality of phase frequency characteristics, and the phase frequency of the FIR filter is determined by the phase frequency characteristic selected by the operation unit. The filter coefficient setting unit is configured to specify a characteristic, and the filter coefficient setting unit stores a plurality of filter coefficients corresponding to each of the phase frequency characteristics of the plurality of FIR filters that can be specified by the change characteristic specifying unit. And a filter coefficient corresponding to the phase frequency characteristic designated by the change characteristic designation unit is obtained from the storage unit and set in the FIR filter.

According to this configuration, the operator can easily set only by performing an operation of selecting a desired phase frequency characteristic of the FIR filter.

In this case, the storage unit of the filter coefficient setting unit may be configured to rewrite the stored filter coefficient.

Thereby, the phase frequency characteristic of the selectable FIR filter can be changed.

In addition, the change characteristic designating unit includes: an input unit that inputs phase setting information including a center frequency, a frequency bandwidth, and an angle; and one or a plurality of the phase setting information that is input from the input unit. The filter coefficient setting means is configured to designate a phase frequency characteristic, and the filter coefficient setting means obtains phase characteristic information that is information representing the phase frequency characteristic based on the phase frequency characteristic designated by the change characteristic designation means, A filter coefficient may be calculated based on the phase characteristic information and set in the FIR filter.

  The change characteristic designating unit has an operation unit for selecting one phase frequency characteristic from among a plurality of phase frequency characteristics, and the phase frequency of the FIR filter is determined by the phase frequency characteristic selected by the operation unit. The filter coefficient setting means is information corresponding to each of the phase frequency characteristics of the plurality of FIR filters that can be specified by the change characteristic specifying means, and includes a center frequency and a frequency bandwidth. Phase characteristic specifying information corresponding to the phase frequency characteristic specified by the change characteristic specifying means, the storage means storing in advance a plurality of pieces of phase characteristic specifying information consisting of one or a plurality of phase setting information consisting of angle and angle Is obtained from the storage means, and then a filter coefficient is calculated based on the phase characteristic specifying information and set in the FIR filter. It may be configured to so that.

  The change characteristic designating means is further configured to designate an amplitude frequency characteristic of the FIR filter to be realized after the change in order to change the amplitude frequency characteristic of the FIR filter, and the filter coefficient setting means May be configured to set a filter coefficient corresponding to the amplitude frequency characteristic and the phase frequency characteristic specified by the change characteristic specifying means in the FIR filter.

  According to this configuration, for example, when an audio signal output from the FIR filter is output as a loud sound from a speaker via an amplifier or the like, the FIR filter has an amplitude frequency characteristic and a phase frequency characteristic by setting the filter coefficient. Since the amplitude frequency characteristic and phase frequency characteristic of the FIR filter are individually set, the sound quality can be easily adjusted according to the listener's preference and various uses. It can be carried out. In particular, it is possible to adjust the sound quality by delaying or advancing the phase of a certain frequency.

  The change characteristic designation means sets a gain adjustment operator for setting a gain corresponding to a display position for each of a plurality of predetermined frequencies, and a phase corresponding to the display position for each frequency. Display means for displaying a phase adjustment operator on the screen, and changing the display position of the gain adjustment operator and the display position of the phase adjustment operator displayed on the screen of the display means The phase adjusting operation specified by the operating means and specifying the amplitude frequency characteristic of the FIR filter by the display position of the gain adjusting operator changed by the operating means. A phase frequency characteristic of the FIR filter is designated by a display position of a child, and the filter coefficient setting means is connected to the change characteristic designation means. A phase which is information indicating the phase frequency characteristic based on the phase frequency characteristic specified by the change characteristic specifying means and obtaining the amplitude characteristic information which is information indicating the amplitude frequency characteristic based on the specified amplitude frequency characteristic After obtaining the characteristic information, a filter coefficient may be calculated based on the amplitude characteristic information and the phase characteristic information and set in the FIR filter.

  According to this configuration, the operator can easily set desired amplitude frequency characteristics and phase frequency characteristics of the FIR filter on the screen of the display means.

  The change characteristic designating means is for setting a gain adjustment operator for setting a gain corresponding to an operation position for each of a plurality of predetermined frequencies and a phase corresponding to the operation position for each frequency. And the phase frequency characteristic of the FIR filter is designated by the operation position of the phase adjustment operation element. The amplitude frequency characteristic of the FIR filter is designated by the operation position of the gain adjustment operation element. The filter coefficient setting means obtains amplitude characteristic information which is information representing the amplitude frequency characteristic based on the amplitude frequency characteristic designated by the change characteristic designation means, and the change characteristic designation means After obtaining phase characteristic information, which is information representing the phase frequency characteristic based on the specified phase frequency characteristic Wherein calculating a filter coefficient based on the amplitude characteristic information and the phase characteristic information may be configured to set the FIR filter.

  According to this configuration, the operator can easily set the desired amplitude frequency characteristic and phase frequency characteristic of the FIR filter by operating the operator.

  The change characteristic designating means includes a display means for displaying the amplitude frequency characteristic and the phase frequency characteristic of the FIR filter on a screen, and an amplitude frequency characteristic and a phase frequency characteristic preliminarily displayed on the screen of the display means. Operating means for changing, and specifying the amplitude frequency characteristic of the FIR filter by the amplitude frequency characteristic changed by the operating means, and the phase frequency of the FIR filter by the phase frequency characteristic changed by the operating means The filter coefficient setting means obtains amplitude characteristic information which is information representing the amplitude frequency characteristic based on the amplitude frequency characteristic designated by the change characteristic designation means, and specifies the change characteristic. Information indicating the phase frequency characteristics based on the phase frequency characteristics specified by the means After obtaining the phase characteristic information that the calculated filter coefficients based on the amplitude characteristic information and the phase characteristic information may be configured to set the FIR filter.

  According to this configuration, the operator can easily set desired amplitude frequency characteristics and phase frequency characteristics of the FIR filter on the screen of the display means.

  In addition, the change characteristic designating unit displays the amplitude characteristic display area and the phase characteristic display area on a screen, draws an amplitude frequency characteristic curve in the amplitude characteristic display area of the screen of the display means, and the phase An operation means for drawing a phase frequency characteristic curve in the characteristic display area, and the amplitude frequency characteristic of the FIR filter is designated by the amplitude frequency characteristic curve drawn by the operation means and drawn by the operation means The FIR filter is configured to designate a phase frequency characteristic by a phase frequency characteristic curve, and the filter coefficient setting unit is information representing the amplitude frequency characteristic based on the amplitude frequency characteristic designated by the change characteristic designation unit. Phase frequency characteristic obtained by obtaining certain amplitude characteristic information and designated by the change characteristic designation means After obtaining phase characteristic information which is information representing the phase frequency characteristic based on the above, the filter coefficient is calculated based on the amplitude characteristic information and the phase characteristic information, and is set in the FIR filter. Also good.

  According to this configuration, the operator can easily set desired amplitude frequency characteristics and phase frequency characteristics of the FIR filter on the screen of the display means.

  The change characteristic designating unit selects a first operating frequency unit for selecting one amplitude frequency characteristic from a plurality of amplitude frequency characteristics, and selects one phase frequency characteristic from the plurality of phase frequency characteristics. Second operating means for specifying the amplitude frequency characteristic of the FIR filter by the amplitude frequency characteristic selected by the first operating means and the phase frequency characteristic selected by the second operating means The filter coefficient setting means represents each corresponding to each of the amplitude frequency characteristics of the plurality of FIR filters that can be designated by the change characteristic designation means. A plurality of amplitude characteristic information as information is stored in advance, and a plurality of the FIR frames that can be specified by the change characteristic specifying means Corresponding to each of the phase frequency characteristics of the filter, a plurality of phase characteristic information which is information representing each is stored in advance, and the amplitude corresponding to the amplitude frequency characteristic designated by the change characteristic designation means After obtaining characteristic information and phase characteristic information corresponding to the phase frequency characteristic designated by the change characteristic designation means from the storage means, a filter coefficient is calculated based on the amplitude characteristic information and the phase characteristic information, The FIR filter may be set.

  According to this configuration, the operator can easily set only by performing an operation of selecting a desired amplitude frequency characteristic and phase frequency characteristic of the FIR filter.

In this case, the storage unit of the filter coefficient setting unit may be configured to rewrite the stored amplitude characteristic information and the phase characteristic information.

Thereby, the amplitude frequency characteristic and the phase frequency characteristic of the selectable FIR filter can be changed.

The change characteristic designating unit selects a first operating frequency unit for selecting one amplitude frequency characteristic from a plurality of amplitude frequency characteristics, and selects one phase frequency characteristic from the plurality of phase frequency characteristics. Second operating means for specifying the amplitude frequency characteristic of the FIR filter by the amplitude frequency characteristic selected by the first operating means and the phase frequency characteristic selected by the second operating means The filter coefficient setting means is configured to designate the phase frequency characteristics of the plurality of FIR filters and the phase frequency characteristics of the plurality of FIR filters that can be designated by the change characteristic designation means. Storage means for storing a plurality of filter coefficients corresponding to each of the characteristics in advance; Acquires corresponding to the amplitude-frequency characteristics and phase-frequency characteristics are specified filter coefficients from said memory means, may be configured to set the FIR filter.

According to this configuration, the operator can easily set only by performing an operation of selecting the desired amplitude frequency characteristic and phase frequency characteristic of the FIR filter.

In this case, the storage unit of the filter coefficient setting unit may be configured to rewrite the stored filter coefficient.

Thereby, the amplitude frequency characteristic and the phase frequency characteristic of the selectable FIR filter can be changed.

Further, the change characteristic designating unit has an input unit for inputting amplitude setting information including a center frequency, a frequency bandwidth, and a gain and inputting phase setting information including a center frequency, a frequency bandwidth, and an angle, The amplitude frequency characteristic of the FIR filter is specified by one or a plurality of the amplitude setting information input from the input means, and the phase frequency characteristic of the FIR filter is specified by one or a plurality of the phase setting information input from the input means. The filter coefficient setting means obtains amplitude characteristic information which is information representing the amplitude frequency characteristic based on the amplitude frequency characteristic designated by the change characteristic designation means, and the change characteristic designation means Is a phase characteristic that is information representing the phase frequency characteristic based on the phase frequency characteristic specified by After obtaining information, it said calculating a filter coefficient based on the amplitude characteristic information and the phase characteristic information may be configured to set the FIR filter.

The change characteristic designating means is a first operating means for selecting one amplitude frequency characteristic from among a plurality of amplitude frequency characteristics, and for selecting one phase frequency characteristic from among a plurality of phase frequency characteristics. The FIR filter has a second operation means, specifies the amplitude frequency characteristic of the FIR filter by the amplitude frequency characteristic selected by the first operation means, and the FIR by the phase frequency characteristic selected by the second operation means. The filter coefficient setting means is information corresponding to each of a plurality of phase frequency characteristics of the plurality of FIR filters that can be specified by the change characteristic specifying means, and is configured to specify a center frequency. A plurality of amplitude characteristic specifying information including one or a plurality of amplitude setting information including frequency bandwidth and gain is stored in advance. Both are information corresponding to each of the phase frequency characteristics of the plurality of FIR filters that can be specified by the change characteristic specifying means, and include one or a plurality of phase setting information including a center frequency, a frequency bandwidth, and an angle. A plurality of phase characteristic specifying information is stored in advance. The amplitude characteristic specifying information corresponding to the amplitude frequency characteristic specified by the change characteristic specifying means and the phase frequency characteristic specified by the change characteristic specifying means After obtaining the corresponding phase characteristic specifying information from the storage means, a filter coefficient may be calculated based on the amplitude characteristic specifying information and the phase characteristic specifying information and set in the FIR filter. Good.

In addition, the acoustic adjustment device of the present invention includes a finite impulse response filter (hereinafter referred to as “FIR filter”) that outputs an input audio signal after performing a filtering process according to a set filter coefficient, Change characteristic designating means for designating a total phase frequency characteristic of the FIR filter and an acoustic output device connected to a subsequent stage of the FIR filter to be realized after changing the phase frequency characteristic of the FIR filter, and the change characteristic Filter coefficient setting means for setting, in the FIR filter, a filter coefficient corresponding to the phase frequency characteristic of the FIR filter corresponding to the total phase frequency characteristic designated by the designation means.

  According to this configuration, for example, when the audio signal output from the FIR filter is output as a loud sound from a subsequent acoustic output device (such as an amplifier and a speaker), the FIR filter sets the phase frequency by setting the filter coefficient. Since the characteristic can be set independently of the amplitude frequency characteristic, the phase frequency characteristic of the FIR filter can be made independent of the amplitude frequency characteristic by specifying the total phase frequency characteristic of the sound output device and the FIR filter. Thus, the sound quality can be easily adjusted according to the listener's preference and various uses. In particular, it is possible to adjust the sound quality by delaying or advancing the phase of a certain frequency.

  Further, the change characteristic designating means includes a display means for displaying on the screen a phase adjusting operator for setting a phase corresponding to a display position for each of a plurality of predetermined frequencies, and a screen of the display means. Operating means for changing the display position of the phase adjustment operator displayed on the display, and the total phase frequency characteristic is determined by the display position of the phase adjustment operator changed by the operation means. The filter coefficient setting means includes storage means in which information representing the phase frequency characteristics of the sound output device is stored in advance, and the total phase designated by the change characteristic designation means After obtaining total phase characteristic information which is information representing the phase frequency characteristic based on the frequency characteristic, the total phase characteristic information and the acoustic output stored in the storage means are obtained. Filter phase characteristic information, which is information representing the phase frequency characteristic of the FIR filter, is obtained from information representing the phase frequency characteristic of the apparatus, a filter coefficient is calculated based on the filter phase characteristic information, and is set in the FIR filter. It may be configured.

  According to this configuration, the operator can easily set the overall phase frequency characteristics of the desired sound output device and the FIR filter on the screen of the display means.

Further, the change characteristic designating unit has a phase adjustment operator for setting a phase corresponding to an operation position for each of a plurality of predetermined frequencies, depending on the operation position of the phase adjustment operator. The filter coefficient setting means includes storage means in which information representing the phase frequency characteristics of the sound output device is stored in advance, and the change characteristic specifying means is configured to specify the overall phase frequency characteristics. After obtaining total phase characteristic information, which is information representing the phase frequency characteristic based on the specified total phase frequency characteristic, the total phase characteristic information and the phase of the sound output device stored in the storage means Filter phase characteristic information, which is information representing the phase frequency characteristic of the FIR filter, is obtained from information representing the frequency characteristic, and based on the filter phase characteristic information. Calculating a filter coefficient Te may be configured to set the FIR filter.

According to this configuration, the operator can easily set the overall phase frequency characteristics of the desired sound output device and the FIR filter by operating the operator.

Further, the change characteristic designating means has a display means for displaying the total phase frequency characteristic on a screen, and an operation means for changing the phase frequency characteristic preliminarily displayed on the screen of the display means, The total phase frequency characteristic is specified by the phase frequency characteristic changed by the operation means, and the filter coefficient setting means is a memory in which information representing the phase frequency characteristic of the acoustic output device is stored in advance. And calculating the total phase characteristic information, which is information representing the phase frequency characteristic based on the total phase frequency characteristic specified by the change characteristic specifying means, and then storing the total phase characteristic information and the storage means. The filter phase is information representing the phase frequency characteristic of the FIR filter from the information representing the phase frequency characteristic of the acoustic output device stored in Seeking sex information, and calculates the filter coefficient based on the filter phase characteristic information may be configured to set the FIR filter.

According to this configuration, the operator can easily set the overall phase frequency characteristics of the desired sound output device and the FIR filter on the screen of the display means.

The display of the phase frequency characteristic by the display means may be a graph.

Further, the change characteristic designating means includes display means for displaying a phase characteristic display area on a screen, and an operation means for drawing a phase frequency characteristic curve in the phase characteristic display area of the screen of the display means, The total phase frequency characteristic is designated by a phase frequency characteristic curve drawn by the operation means, and the filter coefficient setting means stores information representing the phase frequency characteristic of the acoustic output device in advance. Storage means, and after obtaining total phase characteristic information that is information representing the phase frequency characteristic based on the total phase frequency characteristic designated by the change characteristic designation means, the total phase characteristic information and the storage A filter which is information representing the phase frequency characteristics of the FIR filter from information representing the phase frequency characteristics of the acoustic output device stored in the means Obtains a phase characteristic information, calculates a filter coefficient based on the filter phase characteristic information may be configured to set the FIR filter.

  According to this configuration, the operator can easily set the overall phase frequency characteristics of the desired sound output device and the FIR filter on the screen of the display means.

  The change characteristic designating unit has an operation unit for selecting one phase frequency characteristic from a plurality of phase frequency characteristics, and the total phase frequency characteristic is determined by the phase frequency characteristic selected by the operation unit. The filter coefficient setting means includes a plurality of pieces of total phase characteristic information that is information representing a plurality of the total phase frequency characteristics that can be designated by the change characteristic designation means, and the acoustic output device. Information indicating the phase frequency characteristic is stored in advance, and information indicating the phase frequency characteristic of the sound output device and a total corresponding to the total phase frequency characteristic specified by the change characteristic specifying means After obtaining the phase characteristic information from the storage means, the FI is obtained from the total phase characteristic information and the information indicating the phase frequency characteristic of the acoustic output device. Determined filter phase characteristics information which is information indicating a phase frequency characteristics of the filter, calculate the filter coefficients based on the filter phase characteristic information may be configured to set the FIR filter.

  According to this configuration, the operator can easily set only by performing an operation of selecting a total phase frequency characteristic of the desired sound output device and the FIR filter.

In addition, the storage unit of the filter coefficient setting unit may be configured to rewrite stored information indicating the phase frequency characteristics of the acoustic output device.

Thus, even if another sound output device is used as the sound output device, the operator may select a desired overall phase frequency characteristic.

The change characteristic designating unit has an operation unit for selecting one phase frequency characteristic from a plurality of phase frequency characteristics, and the total phase frequency characteristic is determined by the phase frequency characteristic selected by the operation unit. The filter coefficient setting means is a plurality of pieces of information representing the phase frequency characteristics of the FIR filter corresponding to each of the plurality of total phase frequency characteristics that can be specified by the change characteristic specifying means. The filter phase characteristic information is stored in advance, and after the filter phase characteristic information corresponding to the total phase frequency characteristic designated by the change characteristic designation means is obtained from the storage means, the filter A filter coefficient may be calculated based on the phase characteristic information and set in the FIR filter.

  According to this configuration, the operator can easily set only by performing an operation of selecting a total phase frequency characteristic of the desired sound output device and the FIR filter.

In this case, the storage unit of the filter coefficient setting unit may be configured to rewrite the stored filter phase characteristic information.

Thus, even if another sound output device is used as the sound output device, the operator may select a desired overall phase frequency characteristic.

The change characteristic designating unit has an operation unit for selecting one phase frequency characteristic from a plurality of phase frequency characteristics, and the total phase frequency characteristic is determined by the phase frequency characteristic selected by the operation unit. The filter coefficient setting means stores in advance a plurality of filter coefficients of the FIR filter corresponding to each of the plurality of total phase frequency characteristics that can be specified by the change characteristic specifying means. Storage means, and a filter coefficient corresponding to the total phase frequency characteristic designated by the change characteristic designation means may be obtained from the storage means and set in the FIR filter.

  According to this configuration, the operator can easily set only by performing an operation of selecting a total phase frequency characteristic of the desired sound output device and the FIR filter.

In this case, the storage unit of the filter coefficient setting unit may be configured to rewrite the stored filter coefficient.

Thus, even if another sound output device is used as the sound output device, the operator may select a desired overall phase frequency characteristic.

In addition, the change characteristic designating unit includes: an input unit that inputs phase setting information including a center frequency, a frequency bandwidth, and an angle; and the one or more phase setting information that is input from the input unit. The filter coefficient setting means includes storage means in which information representing the phase frequency characteristics of the sound output device is stored in advance, and is designated by the change characteristic designation means. After obtaining the total phase characteristic information, which is information representing the phase frequency characteristic based on the total phase frequency characteristic, the total phase characteristic information and the phase frequency characteristic of the acoustic output device stored in the storage means Filter phase characteristic information, which is information representing the phase frequency characteristic of the FIR filter, is obtained from the information, and based on the filter phase characteristic information, the filter phase characteristic information is obtained. Calculating the filter coefficients, it may be configured to set the FIR filter.

  The input means may be configured to input the phase setting information by inputting respective numerical values of a center frequency, a frequency bandwidth, and an angle.

  Further, display means for displaying on the screen a phase frequency characteristic curve corresponding to the phase setting information input from the input means may be provided.

  In addition, the input means includes an operation element corresponding to each of a center frequency, a frequency bandwidth, and an angle, and is configured to specify the phase setting information by an operation of the operation element. Display means for displaying a phase frequency characteristic curve corresponding to the phase setting information specified by the operation of the child may be provided.

  Further, the input means displays a predetermined phase frequency characteristic curve, and a display means arranged on the predetermined phase frequency characteristic curve and displaying an operator corresponding to each of a center frequency, a frequency bandwidth, and an angle; Operating means for changing the display position of the operation element, and configured to specify the phase setting information according to the display position of the operation element, and the display means of the display position of the operation element The shape of the predetermined phase frequency characteristic curve may be changed in accordance with the change.

  The input means may be configured to input the phase setting information created in advance as data.

  The change characteristic designating unit has an operation unit for selecting one phase frequency characteristic from a plurality of phase frequency characteristics, and the total phase frequency characteristic is determined by the phase frequency characteristic selected by the operation unit. The filter coefficient setting means is information corresponding to each of the plurality of total phase frequency characteristics that can be specified by the change characteristic specifying means, and includes a center frequency, a frequency bandwidth, and an angle. A plurality of pieces of phase characteristic specifying information consisting of one or a plurality of pieces of phase setting information, and storage means for preliminarily storing information representing the phase frequency characteristics of the sound output device, Information indicating the phase frequency characteristics of the sound output device and phase characteristic specifying information corresponding to the total phase frequency characteristics specified by the change characteristic specifying means Is obtained from the storage means, and filter phase characteristic information, which is information representing the phase frequency characteristic of the FIR filter, is obtained from the phase characteristic specifying information and information representing the phase frequency characteristic of the acoustic output device, and the filter A filter coefficient may be calculated based on the phase characteristic information and set in the FIR filter.

  Further, the change characteristic designating means is further configured to designate a total amplitude frequency characteristic of the sound output device and the FIR filter to be realized after changing the amplitude frequency characteristic of the FIR filter, The filter coefficient setting means sets a filter coefficient corresponding to the amplitude frequency characteristic and phase frequency characteristic of the FIR filter corresponding to the total amplitude frequency characteristic and phase frequency characteristic specified by the change characteristic specifying means to the FIR. You may be comprised so that it may set to a filter.

  According to this configuration, for example, when the audio signal output from the FIR filter is output as a loud sound from a subsequent acoustic output device (such as an amplifier and a speaker), the FIR filter can set the amplitude frequency by setting the filter coefficient. Since the characteristic and the phase frequency characteristic can be individually set, the amplitude frequency characteristic and the phase frequency characteristic of the FIR filter can be specified by specifying the total amplitude frequency characteristic and the phase frequency characteristic of the sound output device and the FIR filter. Are individually set, so that the sound quality can be easily adjusted according to the listener's preference and various uses. In particular, it is possible to adjust the sound quality by delaying or advancing the phase of a certain frequency.

  The change characteristic designation means sets a gain adjustment operator for setting a gain corresponding to a display position for each of a plurality of predetermined frequencies, and a phase corresponding to the display position for each frequency. Display means for displaying a phase adjustment operator on the screen, and changing the display position of the gain adjustment operator and the display position of the phase adjustment operator displayed on the screen of the display means And the phase adjusting operator changed by the operating means while specifying the total amplitude frequency characteristic by the display position of the gain adjusting operator changed by the operating means. The total phase frequency characteristic is designated by the display position of the information, and the filter coefficient setting means is information indicating the amplitude frequency characteristic of the acoustic output device. And information indicating the amplitude frequency characteristic based on the total amplitude frequency characteristic designated by the change characteristic designation means. Then, filter amplitude characteristic information, which is information representing the amplitude frequency characteristic of the FIR filter, is obtained from the total amplitude characteristic information and information representing the amplitude frequency characteristic of the acoustic output device stored in the storage means. After obtaining the total phase characteristic information, which is information representing the phase frequency characteristic based on the total phase frequency characteristic designated by the change characteristic designation means, the total phase characteristic information is stored in the storage means Filter phase characteristics which are information representing the phase frequency characteristics of the FIR filter from the information representing the phase frequency characteristics of the acoustic output device. For information, the calculated filter coefficients based filter amplitude characteristics information and to said filter phase characteristic information may be configured to set the FIR filter.

  According to this configuration, the operator can easily set the overall amplitude frequency characteristic and phase frequency characteristic of the desired sound output device and the FIR filter on the screen of the display means.

  The change characteristic designating unit sets a gain adjusting operator for setting a gain corresponding to an operation position for each of a plurality of predetermined frequencies, and a phase corresponding to the operation position for each frequency. A phase adjustment operation element for specifying the total amplitude frequency characteristic by the operation position of the gain adjustment operation element and the total phase frequency characteristic by the operation position of the phase adjustment operation element. The filter coefficient setting means includes storage means for preliminarily storing information indicating the amplitude frequency characteristics of the sound output device and information indicating the phase frequency characteristics, and the change characteristic specifying means After obtaining the overall amplitude characteristic information, which is information representing the amplitude frequency characteristic based on the designated overall amplitude frequency characteristic, the overall amplitude characteristic is obtained. Filter amplitude characteristic information, which is information representing the amplitude frequency characteristic of the FIR filter, is obtained from the information and the information representing the amplitude frequency characteristic of the sound output device stored in the storage means, and designated by the change characteristic designation means. After obtaining the total phase characteristic information, which is information representing the phase frequency characteristic based on the total phase frequency characteristic, the total phase characteristic information and the phase frequency characteristic of the acoustic output device stored in the storage means Filter phase characteristic information, which is information representing the phase frequency characteristic of the FIR filter, is obtained from the information representing the FIR filter, a filter coefficient is calculated based on the filter amplitude characteristic information and the filter phase characteristic information, and set in the FIR filter It may be configured to.

  The change characteristic designating means includes a display means for displaying the total amplitude frequency characteristic and the total phase frequency characteristic on a screen, and an amplitude frequency characteristic and a phase frequency characteristic preliminarily displayed on the screen of the display means. And operating means for changing the total amplitude frequency characteristic by the amplitude frequency characteristic changed by the operating means and the total phase frequency by the phase frequency characteristic changed by the operating means The filter coefficient setting means includes storage means for preliminarily storing information representing the amplitude frequency characteristic and information representing the phase frequency characteristic of the sound output device, and the change characteristic designation Based on the total amplitude frequency characteristic specified by the means, total amplitude characteristic information which is information representing the amplitude frequency characteristic is obtained. Thereafter, filter amplitude characteristic information, which is information representing the amplitude frequency characteristic of the FIR filter, is obtained from the total amplitude characteristic information and information representing the amplitude frequency characteristic of the sound output device stored in the storage means, and the change After obtaining the total phase characteristic information, which is information representing the phase frequency characteristic based on the total phase frequency characteristic designated by the characteristic designation means, the total phase characteristic information and the sound stored in the storage means Filter phase characteristic information which is information representing the phase frequency characteristic of the FIR filter is obtained from information representing the phase frequency characteristic of the output device, and a filter coefficient is calculated based on the filter amplitude characteristic information and the filter phase characteristic information. The FIR filter may be set.

According to this configuration, the operator can easily set the overall amplitude frequency characteristic and phase frequency characteristic of the desired sound output device and the FIR filter on the screen of the display means.

The display of the amplitude frequency characteristic and the phase frequency characteristic by the display means may be a graph.

In addition, the change characteristic designating unit displays the amplitude characteristic display area and the phase characteristic display area on a screen, draws an amplitude frequency characteristic curve in the amplitude characteristic display area of the screen of the display means, and the phase An operation means for drawing a phase frequency characteristic curve in a characteristic display area, and specifying the total amplitude frequency characteristic by the amplitude frequency characteristic curve drawn by the operation means and the phase drawn by the operation means The filter is configured to designate the total phase frequency characteristic by a frequency characteristic curve, and the filter coefficient setting unit stores information indicating the amplitude frequency characteristic of the acoustic output device and information indicating the phase frequency characteristic in advance. And the amplitude frequency characteristic based on the total amplitude frequency characteristic designated by the change characteristic designation means. After obtaining the total amplitude characteristic information, which is information representing the amplitude, the amplitude frequency characteristic of the FIR filter is expressed from the total amplitude characteristic information and the information indicating the amplitude frequency characteristic of the acoustic output device stored in the storage means After obtaining filter amplitude characteristic information that is information, and obtaining total phase characteristic information that is information representing the phase frequency characteristic based on the total phase frequency characteristic designated by the change characteristic designation means, the total phase characteristic Filter phase characteristic information, which is information representing the phase frequency characteristic of the FIR filter, is obtained from the information and information representing the phase frequency characteristic of the acoustic output device stored in the storage means, and the filter amplitude characteristic information and the filter The filter coefficient may be calculated based on the phase characteristic information and set in the FIR filter. .

  According to this configuration, the operator can easily set the overall amplitude frequency characteristic and phase frequency characteristic of the desired sound output device and the FIR filter on the screen of the display means.

  The change characteristic designating unit selects a first operating frequency unit for selecting one amplitude frequency characteristic from a plurality of amplitude frequency characteristics, and selects one phase frequency characteristic from the plurality of phase frequency characteristics. A second operating means for specifying the total amplitude frequency characteristic by the amplitude frequency characteristic selected by the first operating means, and by the phase frequency characteristic selected by the second operating means The filter coefficient setting unit is configured to specify the total phase frequency characteristic, and the filter coefficient setting unit includes a plurality of total amplitude characteristic information that is information indicating the plurality of total amplitude frequency characteristics that can be specified by the change characteristic specifying unit, and A plurality of total phase characteristic information which is information indicating the total phase frequency characteristic, information indicating the amplitude frequency characteristic of the sound output device, and the phase frequency characteristic Information representing the amplitude frequency characteristics of the sound output device and total amplitude characteristic information corresponding to the total amplitude frequency characteristics designated by the change characteristic designation means, Is obtained from the storage means, filter amplitude characteristic information which is information representing the amplitude frequency characteristic of the FIR filter is obtained from the total amplitude characteristic information and information representing the amplitude frequency characteristic of the acoustic output device, and the acoustic output Information representing the phase frequency characteristics of the apparatus and total phase characteristic information corresponding to the total phase frequency characteristics specified by the change characteristic specifying means are acquired from the storage means, and the total phase characteristic information and the acoustic output device Filter phase characteristic information, which is information representing the phase frequency characteristic of the FIR filter, is obtained from information representing the phase frequency characteristic of the FIR filter. After the calculated filter coefficients based filter amplitude characteristics information and to said filter phase characteristic information may be configured to set the FIR filter.

  According to this configuration, the operator can easily set only by performing an operation of selecting the total amplitude frequency characteristic and phase frequency characteristic of the desired sound output device and the FIR filter.

Further, the storage unit of the filter coefficient setting unit may be configured to be able to rewrite stored information representing the amplitude frequency characteristic and information representing the phase frequency characteristic.

As a result, even if another sound output device is used as the sound output device, the operator may select the desired overall amplitude frequency characteristic and phase frequency characteristic.

The change characteristic designating unit selects a first operating frequency unit for selecting one amplitude frequency characteristic from a plurality of amplitude frequency characteristics, and selects one phase frequency characteristic from the plurality of phase frequency characteristics. A second operating means for specifying the total amplitude frequency characteristic by the amplitude frequency characteristic selected by the first operating means, and by the phase frequency characteristic selected by the second operating means The filter coefficient setting means is configured to designate the overall phase frequency characteristic, and the filter coefficient setting means has an amplitude frequency characteristic of the FIR filter corresponding to each of the plurality of overall amplitude frequency characteristics that can be designated by the change characteristic designation means. A plurality of filter amplitude characteristic information, which is information representing A plurality of filter phase characteristic information, which is information representing the phase frequency characteristics of the FIR filter corresponding to each of the phase frequency characteristics, and is stored in advance, and is designated by the change characteristic designation means After obtaining filter amplitude characteristic information corresponding to the total amplitude frequency characteristic and filter phase characteristic information corresponding to the total phase frequency characteristic designated by the change characteristic designation means from the storage means, the filter amplitude characteristic A filter coefficient may be calculated based on the information and the filter phase characteristic information and set in the FIR filter.

  According to this configuration, the operator can easily set only by performing an operation of selecting the total amplitude frequency characteristic and phase frequency characteristic of the desired sound output device and the FIR filter.

In this case, the storage unit of the filter coefficient setting unit may be configured to rewrite the stored filter amplitude characteristic information and the filter phase characteristic information.

As a result, even if another sound output device is used as the sound output device, the operator may select the desired overall amplitude frequency characteristic and phase frequency characteristic.

The change characteristic designating unit selects a first operating frequency unit for selecting one amplitude frequency characteristic from a plurality of amplitude frequency characteristics, and selects one phase frequency characteristic from the plurality of phase frequency characteristics. Second operating means for specifying the total amplitude frequency characteristic by the amplitude frequency characteristic selected by the first operating means, and by the phase frequency characteristic selected by the second operating means The filter coefficient setting means is configured to designate the overall phase frequency characteristic, and the filter coefficient setting means includes a plurality of the overall amplitude frequency characteristics and a plurality of the overall phase frequency characteristics that can be designated by the change characteristic designation means. A plurality of filter coefficients corresponding to the FIR filter are stored in advance, and the total specified by the change characteristic designating means Get a filter coefficient corresponding to the phase frequency characteristic of the total amplitude frequency characteristic from the storage unit may be configured to set the FIR filter.

According to this configuration, the operator can easily set only by performing an operation of selecting the total amplitude frequency characteristic and phase frequency characteristic of the desired sound output device and the FIR filter.

In this case, the storage unit of the filter coefficient setting unit may be configured to rewrite the stored filter coefficient.

As a result, even if another sound output device is used as the sound output device, the operator may select the desired overall amplitude frequency characteristic and phase frequency characteristic.

The change characteristic designating unit inputs amplitude setting information including a center frequency, a frequency bandwidth, and a gain, and inputs phase setting information including a center frequency, a frequency bandwidth, and an angle; and the input The total amplitude frequency characteristic is specified by one or more of the amplitude setting information input from the means, and the total phase frequency characteristic is specified by one or more of the phase setting information input from the input means The filter coefficient setting means includes storage means in which information representing the amplitude frequency characteristics of the sound output device and information representing the phase frequency characteristics of the sound output device are stored in advance, and the change Total amplitude characteristic information which is information representing the amplitude frequency characteristic based on the total amplitude frequency characteristic specified by the characteristic specifying means After obtaining, the filter amplitude characteristic information which is information representing the amplitude frequency characteristic of the FIR filter is obtained from the total amplitude characteristic information and the information representing the amplitude frequency characteristic of the sound output device stored in the storage means. , After obtaining total phase characteristic information, which is information representing the phase frequency characteristic based on the total phase frequency characteristic designated by the change characteristic designation means, and stored in the total phase characteristic information and the storage means Filter phase characteristic information, which is information representing the phase frequency characteristic of the FIR filter, is obtained from the information representing the phase frequency characteristic of the acoustic output device, and a filter coefficient is obtained based on the filter amplitude characteristic information and the filter phase characteristic information. It may be configured to calculate and set the FIR filter.

  The input means inputs the amplitude setting information by inputting the numerical values of the center frequency, the frequency bandwidth, and the gain, and inputs the numerical values of the center frequency, the frequency bandwidth, and the angle. Accordingly, the phase setting information may be input.

  An amplitude frequency characteristic curve corresponding to the amplitude setting information input from the input means is displayed on the screen, and a phase frequency characteristic curve corresponding to the phase setting information input from the input means is displayed on the screen. Display means for displaying may be provided.

  The input means includes a first operator corresponding to each of a center frequency, a frequency bandwidth, and a gain, and a second operator corresponding to each of the center frequency, the frequency bandwidth, and the angle, The amplitude setting information is specified by the operation of the first operator and the phase setting information is specified by the operation of the second operator. By the operation of the first operator on the screen, Display means for displaying an amplitude frequency characteristic curve corresponding to the specified amplitude setting information and displaying a phase frequency characteristic curve corresponding to the phase setting information specified by operation of the second operator is provided. It may be.

  The input means includes a first amplitude frequency characteristic curve, a predetermined phase frequency characteristic curve, and a first frequency corresponding to a center frequency, a frequency bandwidth, and a gain that are arranged on the predetermined amplitude frequency characteristic curve. Display means for displaying an operation element and a second operation element arranged on the predetermined phase frequency characteristic curve and corresponding to a center frequency, a frequency bandwidth and an angle; the first operation element; Operating means for changing the display position of the second operator, specifying the amplitude setting information by the display position of the first operator, and setting the phase by the display position of the second operator The display means is configured to specify information, and the display means changes a shape of the predetermined amplitude frequency characteristic curve in accordance with a change in a display position of the first operator, and a table of the second operator. It may be configured as with the change of position to change the shape of the predetermined phase frequency characteristic curve.

  The input means may be configured to input the amplitude setting information and the phase setting information created in advance as data.

  The change characteristic designating unit selects a first operating frequency unit for selecting one amplitude frequency characteristic from a plurality of amplitude frequency characteristics, and selects one phase frequency characteristic from the plurality of phase frequency characteristics. Second operating means for specifying the total amplitude frequency characteristic by the amplitude frequency characteristic selected by the first operating means, and by the phase frequency characteristic selected by the second operating means. The filter coefficient setting means is information corresponding to each of the plurality of overall amplitude frequency characteristics that can be specified by the change characteristic specifying means, and is configured to specify a total phase frequency characteristic, and a center frequency and A plurality of pieces of amplitude characteristic specifying information including one or a plurality of amplitude setting information including a frequency bandwidth and a gain are stored in advance, and the change characteristic specification is stored. Information corresponding to each of the plurality of total phase frequency characteristics that can be specified by the means, and a plurality of pieces of phase characteristic specifying information including one or more phase setting information including a center frequency, a frequency bandwidth, and an angle Information that represents the amplitude frequency characteristics of the sound output device, and has storage means for storing information representing the amplitude frequency characteristics of the sound output device and information representing the phase frequency characteristics in advance. Information indicating the phase frequency characteristics of the sound output device, amplitude characteristic specifying information corresponding to the total amplitude frequency characteristics specified by the change characteristic specifying means, and the total phase specified by the change characteristic specifying means After obtaining the phase characteristic specifying information corresponding to the frequency characteristic from the storage means, the amplitude characteristic specifying information and the amplitude frequency characteristic of the sound output device Filter amplitude characteristic information which is information representing the amplitude frequency characteristic of the FIR filter is obtained from the information representing the phase frequency characteristic of the FIR filter from the phase characteristic specifying information and the information representing the phase frequency characteristic of the acoustic output device. The filter phase characteristic information, which is information indicating the filter amplitude characteristic information, is calculated, the filter coefficient is calculated based on the filter amplitude characteristic information and the filter phase characteristic information, and is set in the FIR filter.

  In addition, the acoustic adjustment device of the present invention includes a finite impulse response filter (hereinafter referred to as “FIR filter”) that outputs an input audio signal after performing a filtering process according to a set filter coefficient, In order to change the phase frequency characteristics of the FIR filter, the phase change frequency specifying means for specifying the frequency to advance or delay the phase, and the phase of the frequency specified by the phase change frequency specifying means are advanced or delayed by a predetermined angle Filter coefficient setting means for calculating a filter coefficient based on the phase characteristic information after setting phase characteristic information which is information representing the phase frequency characteristic based on the phase frequency characteristic of the FIR filter, and setting the filter coefficient in the FIR filter; It has.

  According to this configuration, for example, when an audio signal output from the FIR filter is output as a loud sound from a speaker via an amplifier or the like, the FIR filter changes the phase frequency characteristic to the amplitude frequency characteristic by setting the filter coefficient. Since the phase frequency characteristic of the FIR filter can be set independently of the amplitude frequency characteristic, the sound quality can be easily adjusted according to the listener's preference and various uses. be able to. In particular, it is possible to adjust the sound quality by delaying or advancing the phase of a certain frequency. The phase change frequency designating unit can advance or delay the phase of the frequency only by designating the frequency to advance or delay the phase, and the operation is easy.

  In addition, in order to change the amplitude frequency characteristic of the FIR filter, amplitude change frequency designation means for designating a frequency to increase or decrease the gain is provided, and the filter coefficient setting means obtains the phase characteristic information and the amplitude characteristic After obtaining amplitude characteristic information which is information representing the amplitude frequency characteristic based on the amplitude frequency characteristic of the FIR filter in which the gain of the frequency designated by the change frequency designation means is increased or decreased by a predetermined value, the phase characteristic information And a filter coefficient based on the amplitude characteristic information and set to the FIR filter.

  According to this configuration, for example, when an audio signal output from the FIR filter is output as a loud sound from a speaker via an amplifier or the like, the amplitude frequency characteristic and the phase frequency characteristic of the FIR filter are individually set. By setting, it is possible to easily adjust the sound quality according to the listener's preference and various uses. The phase change frequency designation means allows the phase of the frequency to be advanced or delayed simply by designating the frequency to advance or delay the phase, and the amplitude change frequency designation means only designates the frequency to increase or decrease the gain. The amplitude of the frequency can be increased or decreased, and operation is easy.

  The acoustic adjustment device of the present invention is an acoustic adjustment device including a filter device, wherein the filter device inputs an audio signal, performs filtering on the audio signal, and applies the filtered audio signal. The filter device is configured so that an arbitrary phase frequency characteristic can be set as the phase frequency characteristic.

  According to this configuration, since an arbitrary phase frequency characteristic can be applied to the audio signal, the sound quality can be easily adjusted according to the listener's preference and various uses.

  The filter device may set an arbitrary phase frequency characteristic in an arbitrary frequency range.

  The filter device may be configured such that the phase frequency characteristic can be set independently of the amplitude frequency characteristic.

  The filter device may be configured such that the amplitude frequency characteristic can be set independently of the phase frequency characteristic.

  Further, the filter device may be configured to change only the phase frequency characteristic without changing the amplitude frequency characteristic.

  In addition, an acoustic output device is connected to the subsequent stage, and the phase frequency characteristic of the filter device is set so that the total phase frequency characteristic of the filter device and the acoustic output device is the same as the desired phase frequency characteristic. It may be.

  According to this configuration, the desired phase frequency characteristic can be simulated by the acoustic output device.

  In addition, a sound output device having a speaker is connected at the subsequent stage, and the phase of the filter device is set so that the total phase frequency characteristic of the filter device and the speaker is the same as the phase frequency characteristic of another specific speaker. A frequency characteristic may be set.

  According to this configuration, the phase frequency characteristic of the other specific speaker can be simulated by the speaker.

  The filtering may be performed by digital signal processing.

  Also, the acoustic adjustment device of the present invention has a digital signal processing means, and the digital signal processing means is capable of adjusting the phase frequency characteristic, and outputs the phase of the input audio signal by changing the phase at an arbitrary angle. Is configured to do.

  In order to achieve the second object, the first acoustic device of the present invention inputs an audio signal, filters and outputs the audio signal, and outputs an amplitude frequency characteristic as its own phase frequency characteristic. Includes a filter device that can independently set an arbitrary phase frequency characteristic.

  According to this configuration, since an arbitrary phase frequency characteristic can be applied to the audio signal, the sound quality can be easily adjusted according to the listener's preference and various uses. In particular, it is possible to adjust the sound quality by delaying or advancing the phase of a certain frequency.

  Further, the second acoustic device is the above-described first acoustic device, wherein an external input terminal for inputting an audio signal from the outside and the audio signal input from the external input terminal are input via the filter device. In addition, an amplification circuit that amplifies and outputs power and a speaker that converts an audio signal output from the amplification circuit into an acoustic signal and outputs the sound signal to the outside are provided.

  This configuration is a so-called amplifier built-in speaker in which a filter device is built in, and it is possible to adjust the sound quality output from the speaker according to the listener's preference and various uses.

  Further, the third acoustic device is the above-described first acoustic device, wherein a microphone that converts an acoustic signal input from the outside into an audio signal and the audio signal input from the microphone are passed through the filter device. And an amplifier circuit that amplifies and outputs power, and a speaker that converts an audio signal output from the amplifier circuit into an acoustic signal and outputs the sound signal.

  In this configuration, the filter device is built in the loudspeaker, and the sound quality output from the speaker can be adjusted according to the listener's preference and various uses.

  Further, the fourth acoustic device is the above-described first acoustic device, wherein an external input terminal for inputting an audio signal from the outside and the audio signal input from the external input terminal are input via the filter device. An amplifier circuit that amplifies and outputs power and an external output terminal that outputs an audio signal output from the amplifier circuit to the outside are provided.

  This configuration is a configuration in which a filter device is built in the amplifier. For example, when a speaker is connected to the subsequent stage, the sound quality output from the speaker can be adjusted according to the listener's preference and various uses. It becomes possible.

  Further, a fifth acoustic device according to the first acoustic device described above, a receiving circuit that converts a radio wave signal input from an antenna into an electrical signal, and a demodulation circuit that demodulates and outputs the electrical signal to an audio signal; And an external output terminal for outputting an audio signal output from the demodulation circuit to the outside through the filter device.

  This configuration is a so-called wireless tuner with a built-in filter device. For example, when a sound output device consisting of an amplifier and a speaker is connected in the subsequent stage, the speaker can be used according to the listener's preference and various uses. It is possible to adjust the output sound quality.

  In addition, the sixth acoustic device receives a plurality of external input terminals for inputting audio signals from the outside and the audio signals input from the plurality of external input terminals, respectively, in the first acoustic device. A synthesizing circuit for synthesizing and outputting the input audio signals and an external output terminal for outputting the audio signals output from the synthesizing circuit to the outside via the filter device are provided.

  This configuration is a so-called audio mixer with a built-in filter device. For example, when a sound output device consisting of an amplifier and a speaker is connected in the subsequent stage, depending on the listener's preference, various uses, etc. It is possible to adjust the output sound quality.

  The seventh acoustic device includes a plurality of the filter devices in the first acoustic device, and a plurality of external input terminals that are connected to the respective filter devices and input audio signals from the outside. And a synthesis circuit for inputting the audio signal from each of the plurality of external input terminals via the filter device, synthesizing and outputting the input audio signals, and outputting from the synthesis circuit An external output terminal for outputting an audio signal to the outside is provided.

  This configuration is a so-called audio mixer with a built-in filter device. For example, when a sound output device consisting of an amplifier and a speaker is connected in the subsequent stage, depending on the listener's preference, various uses, etc. It is possible to adjust the output sound quality.

  In the first to seventh acoustic devices, the filter device may be capable of setting an arbitrary phase frequency characteristic in an arbitrary frequency range.

The filter device may be configured such that the amplitude frequency characteristic can be set independently of the phase frequency characteristic.

The setting of the phase frequency characteristic of the filter device may be performed by an external device.

  The setting of the phase frequency characteristic and the amplitude frequency characteristic of the filter device may be configured to be performed by an external device.

  The filter device may be set with a predetermined phase frequency characteristic.

  In the second and third acoustic devices, the phase of the filter device is set so that a total phase frequency characteristic of the amplifier circuit, the speaker, and the filter device is the same as a desired phase frequency characteristic. A frequency characteristic may be set.

  According to this configuration, a desired phase frequency characteristic can be simulated by the speaker.

  Further, in the second and third acoustic devices, the phase of the filter device is set so that a total phase frequency characteristic of the speaker and the filter device is the same as a phase frequency property of another specific speaker. A frequency characteristic may be set.

  According to this configuration, the phase frequency characteristic of another specific speaker can be simulated by the speaker.

  In the fourth to sixth acoustic devices described above, when a sound output device is connected in the subsequent stage, the total phase frequency characteristics of the sound output device and the filter device are the same as the desired phase frequency characteristics. The phase frequency characteristics of the filter device may be set so that

  According to this configuration, a desired phase frequency characteristic can be simulated by the sound output device.

  In addition, in the fourth to sixth acoustic devices, when a sound output device having a speaker is connected at the subsequent stage, the total phase frequency characteristics of the speaker and the filter device are different from those of other specific speakers. The phase frequency characteristic of the filter device may be set so as to be the same as the phase frequency characteristic.

  According to this configuration, the phase frequency characteristic of another specific speaker can be simulated by the speaker.

  In the above acoustic device, the filter device may be configured to change only the phase frequency characteristic without changing the amplitude frequency characteristic.

  The filter device may be capable of changing the phase frequency characteristic.

  Further, the filter device may be capable of changing its amplitude frequency characteristic.

  Further, the filter device may be provided with phase characteristic specifying operation means for performing an operation for specifying a desired phase frequency characteristic to be realized after the change in order to change the phase frequency characteristic.

  According to this configuration, the operator can set a desired phase frequency characteristic in the filter device by operating the phase characteristic specifying operation means.

  Furthermore, the filter device may be provided with an amplitude characteristic designation operation means for performing an operation for designating a desired amplitude frequency characteristic to be realized after the change in order to change the amplitude frequency characteristic.

  According to this configuration, the operator can set a desired phase frequency characteristic in the filter device by operating the amplitude characteristic specifying operation means.

  In addition, in order to change the phase frequency characteristic, the filter device designates a total phase frequency characteristic of an acoustic output device connected to a subsequent stage of the filter device and the filter device, which should be realized after the change. A total phase characteristic designating operation means for performing an operation for the first phase frequency characteristic, and is configured to set its own phase frequency characteristic according to the total phase frequency characteristic designated by the total phase characteristic designating operation means. Also good.

  According to this configuration, the operator can realize a desired total phase frequency characteristic of the sound output device and the filter device by operating the total phase characteristic specifying operation means.

  Furthermore, in order to change the amplitude frequency characteristic, the filter device designates a total amplitude frequency characteristic of an acoustic output device connected to a subsequent stage of the filter device and the filter device, which should be realized after the change. A total amplitude characteristic designating operation means for performing an operation for the first amplitude frequency characteristic, and is configured to set its own amplitude frequency characteristic according to the total amplitude frequency characteristic designated by the total amplitude characteristic designation manipulation means. Also good.

  According to this structure, the operator can implement | achieve the synthetic | combination amplitude frequency characteristic of the desired sound output apparatus and filter apparatus by operating a synthetic | combination amplitude characteristic designation | designated operation means.

  In addition, the filter device performs a filtering process corresponding to a set filter coefficient on the input audio signal and outputs the finite impulse response filter (hereinafter referred to as “FIR filter”), and the filter device. In order to change the phase frequency characteristic of the FIR filter that is the phase frequency characteristic of the FIR filter, the change characteristic specifying means for specifying the phase frequency characteristic of the FIR filter to be realized after the change, and the change characteristic specifying means Filter coefficient setting means for setting a filter coefficient corresponding to the phase frequency characteristic in the FIR filter may be provided.

  According to this configuration, for example, when an audio signal output from the FIR filter is output as a loud sound from a speaker via an amplifier or the like, the FIR filter changes the phase frequency characteristic to the amplitude frequency characteristic by setting the filter coefficient. Since the phase frequency characteristic of the FIR filter can be set independently of the amplitude frequency characteristic, the sound quality can be easily adjusted according to the listener's preference and various uses. be able to. In particular, it is possible to adjust the sound quality by delaying or advancing the phase of a certain frequency.

  The change characteristic designating means is further configured to designate an amplitude frequency characteristic of the FIR filter to be realized after the change in order to change the amplitude frequency characteristic of the FIR filter, and the filter coefficient setting means May be configured to set a filter coefficient corresponding to the amplitude frequency characteristic and the phase frequency characteristic specified by the change characteristic specifying means in the FIR filter.

  According to this configuration, for example, when an audio signal output from the FIR filter is output as a loud sound from a speaker via an amplifier or the like, the FIR filter has an amplitude frequency characteristic and a phase frequency characteristic by setting the filter coefficient. Since the amplitude frequency characteristic and phase frequency characteristic of the FIR filter are individually set, the sound quality can be easily adjusted according to the listener's preference and various uses. It can be carried out.

  In addition, the filter device performs a filter process corresponding to a set filter coefficient on an input audio signal and outputs the finite impulse response filter (hereinafter referred to as “FIR filter”); Change characteristic designation that designates a total phase frequency characteristic of an acoustic output device connected to a subsequent stage of the filter device and the FIR filter to be realized after changing the phase frequency characteristic of the FIR filter, which is a phase frequency characteristic And filter coefficient setting means for setting a filter coefficient corresponding to the phase frequency characteristic of the FIR filter corresponding to the total phase frequency characteristic specified by the change characteristic specifying means in the FIR filter. Also good.

  According to this configuration, for example, when the audio signal output from the FIR filter is output as a loud sound from a subsequent acoustic output device (such as an amplifier and a speaker), the FIR filter sets the phase frequency by setting the filter coefficient. Since the characteristic can be set independently of the amplitude frequency characteristic, the phase frequency characteristic of the FIR filter can be made independent of the amplitude frequency characteristic by specifying the total phase frequency characteristic of the sound output device and the FIR filter. Thus, the sound quality can be easily adjusted according to the listener's preference and various uses.

  The change characteristic designation means is further configured to designate a total amplitude frequency characteristic of the acoustic output device and the FIR filter to be realized after changing the amplitude frequency characteristic of the FIR filter, The coefficient setting means provides the FIR filter with a filter coefficient corresponding to the amplitude frequency characteristic and phase frequency characteristic of the FIR filter corresponding to the total amplitude frequency characteristic and phase frequency characteristic specified by the change characteristic specifying means. It may be configured to set.

  According to this configuration, for example, when the audio signal output from the FIR filter is output as a loud sound from a subsequent acoustic output device (such as an amplifier and a speaker), the FIR filter can set the amplitude frequency by setting the filter coefficient. Since the characteristic and the phase frequency characteristic can be individually set, the amplitude frequency characteristic and the phase frequency characteristic of the FIR filter can be specified by specifying the total amplitude frequency characteristic and the phase frequency characteristic of the sound output device and the FIR filter. Are individually set, so that the sound quality can be easily adjusted according to the listener's preference and various uses.

  In addition, the filter device performs a filter process corresponding to a set filter coefficient on an input audio signal and outputs the finite impulse response filter (hereinafter referred to as “FIR filter”); In order to change the phase frequency characteristic of the FIR filter, which is a phase frequency characteristic, phase change frequency specifying means for specifying a frequency to advance or delay the phase, and a phase of the frequency specified by the phase change frequency specifying means at a predetermined angle After obtaining phase characteristic information which is information representing the phase frequency characteristic based on the phase frequency characteristic of the advanced or delayed FIR filter, a filter coefficient is calculated based on the phase characteristic information and set in the FIR filter And a filter coefficient setting unit.

  According to this configuration, for example, when an audio signal output from the FIR filter is output as a loud sound from a speaker via an amplifier or the like, the FIR filter changes the phase frequency characteristic to the amplitude frequency characteristic by setting the filter coefficient. Since the phase frequency characteristic of the FIR filter can be set independently of the amplitude frequency characteristic, the sound quality can be easily adjusted according to the listener's preference and various uses. be able to. The phase change frequency designating unit can advance or delay the phase of the frequency only by designating the frequency to advance or delay the phase, and the operation is easy.

  Further, the filter device is further provided with amplitude change frequency specifying means for specifying a frequency to increase or decrease the gain in order to change the amplitude frequency characteristic of the FIR filter, and the filter coefficient setting means includes the phase coefficient setting means. Amplitude characteristic information which is information representing the amplitude frequency characteristic based on the amplitude frequency characteristic of the FIR filter obtained by obtaining characteristic information and increasing or decreasing the gain of the frequency designated by the amplitude change frequency designation means by a predetermined value. After the calculation, a filter coefficient may be calculated based on the phase characteristic information and the amplitude characteristic information and set in the FIR filter.

  According to this configuration, for example, when an audio signal output from the FIR filter is output as a loud sound from a speaker via an amplifier or the like, the amplitude frequency characteristic and the phase frequency characteristic of the FIR filter are individually set. By setting, it is possible to easily adjust the sound quality according to the listener's preference and various uses. The phase change frequency designation means allows the phase of the frequency to be advanced or delayed simply by designating the frequency to advance or delay the phase, and the amplitude change frequency designation means only designates the frequency to increase or decrease the gain. The amplitude of the frequency can be increased or decreased, and operation is easy.

  In order to achieve the third object, the speech editing program of the present invention provides a computer with data extraction means for extracting speech waveform data from a speech file of the first file format, and for the extracted speech waveform data. The predetermined phase frequency characteristic is set so that the phase frequency characteristic of the audio signal based on the audio waveform data is changed independently of the amplitude frequency characteristic by performing the filter process. And a voice editing program for functioning as a file creation means for creating a voice file of the second file format based on the voice waveform data subjected to the filtering process.

  According to this configuration, by adjusting the phase frequency characteristic of the audio signal independently of the amplitude frequency characteristic by the filter means in which the predetermined phase frequency characteristic is set, adjustment of sound quality that could not be realized conventionally is performed. Audio files can be created. For example, by adjusting the phase in a certain band without changing the amplitude, the sound in the band whose phase has been advanced becomes more emphasized and can no longer be heard. Thus, it is possible to create an audio file in which the sound quality is adjusted according to the listener's preference and various uses.

  The data extraction unit may extract voice waveform data from the voice file of the recording medium on which the voice file of the first file format is recorded.

  The file creation means may record the created audio file of the second file format on a recording medium.

  Further, the first file format and the second file format may be the same file format.

  The computer may be an audio editing program for further functioning as filter characteristic changing means for changing the phase frequency characteristic of the filter means independently of the amplitude frequency characteristic.

  According to this configuration, by changing the phase frequency characteristic of the filter means independently of the amplitude frequency characteristic, it is possible to create an audio file in which the sound quality is adjusted according to other uses.

  The filter characteristic changing unit may set a designated phase frequency characteristic in the filter unit.

  According to this configuration, a desired phase frequency characteristic can be set to the filter means by designating the desired phase frequency characteristic to the filter characteristic changing means from the outside.

  In addition, the filter characteristic changing unit is configured so that the total phase frequency characteristic of the specific sound output device and the filter unit is the same as the specified phase frequency characteristic, according to the specified phase frequency characteristic. The phase frequency characteristic of the filter unit may be derived, and the derived phase frequency characteristic may be set in the filter unit.

  According to this configuration, it is possible to create an audio file that can simulate the phase frequency characteristics designated by the filter characteristic changing means by a specific sound output device.

  Further, the filter characteristic changing means is adapted to the specified phase frequency characteristic so that the total phase frequency characteristic of the first speaker and the filter means is the same as the phase frequency characteristic of the second speaker. A phase frequency characteristic of the filter unit may be derived, and the derived phase frequency characteristic may be set in the filter unit.

  According to this configuration, an audio file capable of simulating the phase frequency characteristics of the second speaker can be created by the first speaker having a phase frequency characteristic different from that of the second speaker.

  Further, the filter characteristic changing means may change the phase frequency characteristic of the filter means and change the amplitude frequency characteristic of the filter means independently of the phase frequency characteristic.

  The filter characteristic changing unit may set the designated phase frequency characteristic in the filter unit and set the designated amplitude frequency characteristic in the filter unit.

  According to this configuration, it is possible to set desired phase frequency characteristics and amplitude frequency characteristics from the outside to the filter means by designating the filter characteristic changing means.

  In addition, the filter characteristic changing unit is configured so that the total phase frequency characteristic of the specific sound output device and the filter unit is the same as the specified phase frequency characteristic, according to the specified phase frequency characteristic. A phase frequency characteristic of the filter unit is derived, the derived phase frequency characteristic is set in the filter unit, and a total amplitude frequency characteristic of the specific sound output device and the filter unit is designated as an amplitude frequency characteristic. The amplitude frequency characteristic of the filter means corresponding to the designated amplitude frequency characteristic may be derived so as to be the same as the above, and the derived amplitude frequency characteristic may be set in the filter means.

  According to this configuration, it is possible to create an audio file that can simulate the phase frequency characteristic and the amplitude frequency characteristic designated by the filter characteristic changing unit by a specific sound output device.

  Further, the filter characteristic changing means is adapted to the specified phase frequency characteristic so that the total phase frequency characteristic of the first speaker and the filter means is the same as the phase frequency characteristic of the second speaker. A phase frequency characteristic of the filter unit is derived, the derived phase frequency characteristic is set in the filter unit, and a total amplitude frequency characteristic of the first speaker and the filter unit is determined by the second speaker. The amplitude frequency characteristic of the filter unit corresponding to the designated amplitude frequency characteristic may be derived so as to be the same as the amplitude frequency characteristic, and the derived amplitude frequency characteristic may be set in the filter unit.

According to this configuration, an audio file that can simulate the phase frequency characteristic and the amplitude frequency characteristic of the second speaker is created by the first speaker having a phase frequency characteristic and an amplitude frequency characteristic different from those of the second speaker. be able to.

The filter characteristic changing means includes a change characteristic specifying means for specifying a phase frequency characteristic of the filter means to be realized after the change, and the change characteristic specifying means for changing the phase frequency characteristic of the filter means. You may make it have a filter coefficient setting means which sets the filter coefficient according to the designated phase frequency characteristic to the said filter means.

  Further, the filter characteristic changing means specifies a change characteristic designation for specifying the amplitude frequency characteristic and the phase frequency characteristic of the filter means to be realized after the change in order to change the amplitude frequency characteristic and the phase frequency characteristic of the filter means. And filter coefficient setting means for setting filter coefficients according to the amplitude frequency characteristic and phase frequency characteristic specified by the change characteristic specifying means in the filter means.

Further, the filter characteristic changing unit is a change characteristic specifying unit that specifies a total phase frequency characteristic of a specific sound output device and the filter unit, which should be realized after changing the phase frequency characteristic of the filter unit, You may make it have a filter coefficient setting means which sets the filter coefficient according to the phase frequency characteristic of the said filter means corresponding to the said total phase frequency characteristic designated by the said change characteristic designation | designated means to the said filter means.

Further, the filter characteristic changing means is to be realized after changing the amplitude frequency characteristic and the phase frequency characteristic of the filter means. The total amplitude frequency characteristic and phase frequency characteristic of the specific sound output device and the filter means are to be realized. Change characteristic designating means for designating phase frequency characteristics, and filter coefficients corresponding to the amplitude frequency characteristics and phase frequency characteristics of the filter means corresponding to the total amplitude frequency characteristics and phase frequency characteristics designated by the change characteristic designating means Filter coefficient setting means for setting the filter means to the filter means.

  The computer may be incorporated in an audio device.

  According to this configuration, for example, since it can be incorporated into an audio device such as a recording device, a playback device, or an audio editing device, it is possible to create an audio file that has been adjusted as described above in the audio device. Further, the computer may be configured by utilizing a CPU or the like already incorporated in the audio device.

  The acoustic adjustment device of the present invention has the above-described configuration, and has an effect that the sound quality can be easily adjusted according to the listener's preference and various uses.

  The acoustic device of the present invention has the above-described configuration, and has an effect that the sound quality can be easily adjusted according to the listener's preference and various uses.

  The audio editing program of the present invention has the above-described configuration, and can create an audio file as a sound source in which the sound quality is adjusted according to the listener's preference and various uses. There is an effect.

  The above object, other objects, features, and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments with reference to the accompanying drawings.

FIG. 1 is a block diagram illustrating an example of a configuration of an acoustic device using the acoustic adjustment device according to the first embodiment of the present invention. FIG. 2 is a circuit diagram showing an example of the configuration of the FIR filter according to the first embodiment of the present invention. FIG. 3 is a diagram showing a display screen of the operation input unit of the first configuration example according to the first embodiment of the present invention. FIG. 4 is a diagram showing a display screen of the operation input unit of the second configuration example according to the first embodiment of the present invention. FIG. 5 is a diagram showing a display screen of the operation input unit of the sixth configuration example according to the first embodiment of the present invention. FIG. 6 is a diagram showing a display screen of the operation input unit of the seventh configuration example according to the first embodiment of the present invention. FIG. 7 is a diagram showing a display screen of the operation input unit of the eighth configuration example according to the first embodiment of the present invention. FIG. 8 is a block diagram showing the configuration of the acoustic device according to the second embodiment of the present invention. FIG. 9 is a block diagram showing the configuration of the acoustic device according to the fourth embodiment of the present invention. FIG. 10 is a block diagram showing the configuration of the acoustic device according to the fifth embodiment of the present invention. FIG. 11 is a block diagram showing a configuration of an audio device according to the sixth embodiment of the present invention. FIG. 12A is a block diagram showing a configuration of a voice editing apparatus that executes a voice editing program according to the seventh embodiment of the present invention, and FIG. 12B shows a voice file created by the voice editing apparatus. It is a figure which shows an example of the audio equipment which reproduces | regenerates and outputs. FIG. 13 is a flowchart showing the operation of the speech editing apparatus realized by executing the speech editing program according to the seventh embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Acoustic adjustment apparatus 2 D / A converter 3 Amplifier 4 Speaker 5-9 Case 10 Editing process part 11 FIR filter 12 Operation control part 13 Operation input part 14 Data reading part 15 1st memory 16 2nd memory 17 Data Writing unit 18 Recording medium playback device

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[First embodiment; acoustic adjustment device]
FIG. 1 is a block diagram illustrating an example of a configuration of an acoustic device using the acoustic adjustment device according to the first embodiment of the present invention.

  This acoustic device includes an acoustic adjustment device 1 that is a filter device, a D / A (digital / analog) converter 2 connected to the acoustic adjustment device 1, and a D / A converter 2 subsequent to the acoustic adjustment device 1. And an acoustic output device connected via the cable.

  The sound output device includes an amplifier 3 connected to the D / A converter 2 and a speaker 4 connected to the amplifier 3.

  The acoustic adjustment device 1 includes an FIR (finite impulse response) filter 11, an arithmetic control unit 12 that functions as a filter coefficient setting unit, and an operation input unit 13 that functions as a change characteristic designation unit. The FIR filter 11 of the acoustic adjustment device 1 is inserted in the middle of a signal line connecting the external input terminal IN of the acoustic device and the D / A converter 2.

  The FIR filter 11 performs digital signal processing. For example, a digital audio signal obtained by A / D converting an analog audio signal output from a microphone, or a digital audio signal output from a recording medium playback device such as a CD player, It is input via the external input terminal IN of the audio device. A signal that has been subjected to predetermined processing (filtering) by the FIR filter 11 is input to the D / A converter 2 to be converted into an analog signal, further amplified by the amplifier 3 and output to the speaker 4. Is output as a loud sound (acoustic signal).

  FIG. 2 is a circuit diagram showing an example of the configuration of the FIR filter 11.

The FIR filter 11 includes n delay circuits 21 connected in cascade, (n + 1) multipliers 22, and an adder 23. Each delay circuit 21 outputs each input signal after being delayed by a sampling period, and each multiplier 22 multiplies the input signal by a filter coefficient h _k (k = 0 to n) set corresponding to each input signal. The outputs of the multipliers 22 are added by the adder 23 and output. In such an FIR filter 11, an amplitude frequency characteristic (hereinafter referred to as “amplitude characteristic”) and a phase frequency characteristic (hereinafter referred to as “phase characteristic”) are determined by setting a filter coefficient h _k .

  Here, the phase characteristic refers to a characteristic expressed with the frequency on the horizontal axis and the phase on the vertical axis. The amplitude characteristic refers to a characteristic represented with a frequency as a horizontal axis and an amplitude (for example, gain) as a vertical axis.

The arithmetic control unit 12 is constituted by, for example, a microcomputer, derives a filter coefficient h _k corresponding to the operation of the operation input unit 13 and sets it in the FIR filter 11. Each filter coefficient h _k is set as a gain of each multiplier 22. In the case of first to third configuration examples to be described later, the arithmetic control unit 12 calculates a filter coefficient h _k corresponding to the amplitude characteristic and the phase characteristic specified by the operation of the operation input unit 13 and supplies the filter coefficient h _k to the FIR filter 11. Set. In this case, the filter coefficient h _k can be _obtained by performing inverse fast Fourier transform (inverse FFT) or the like on the information of the frequency characteristics (amplitude characteristics and phase characteristics).

  In the operation input unit 13, for example, an operation for designating an amplitude characteristic and a phase characteristic set in the FIR filter 11 is performed by the operator. In the case of first to third configuration examples described later, the operation input unit 13 is configured using, for example, a liquid crystal pen tablet that integrates a liquid crystal display and a pen tablet. In this case, a display screen for inputting amplitude characteristics and phase characteristics is displayed, and a stylus pen is used as a pointing device.

  Hereinafter, although each structural example is described, in each structural example, the structure of the operation input part 13 and the calculation control part 12 differs, and it is the same about another structure.

(First configuration example)
FIG. 3 is a diagram illustrating a display screen of the operation input unit 13 of the first configuration example.

  In the case of the display screen 31 shown in FIG. 3, the lower left area of the screen is an amplitude characteristic designation area for designating the amplitude characteristic, and the amplitude characteristic designated by the left upper area is displayed as an amplitude characteristic curve 34. This is an amplitude characteristic display area. The lower right area of the screen is a phase characteristic designation area for designating phase characteristics, and the upper right area is a phase characteristic display area for displaying the phase characteristics designated by the phase characteristic curve 35.

  In the amplitude characteristic designation area, for example, a gain adjustment operator 32 for setting a gain (gain) at each of a plurality of preset frequencies within a range of audible frequencies (20 Hz to 20 kHz) is displayed. Similarly, in the phase characteristic designation area, a phase adjustment operator 33 for setting the phase at each of a plurality of preset frequencies within the above audible frequency range is displayed. For example, when the above-described plurality of preset frequencies are 10, the gain adjusting operator 32 and the phase adjusting operator 33 arranged from left to right in FIG. For example, it corresponds to the frequencies of 31 Hz, 62 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, and 16 kHz. Moreover, although the numerical value of these frequencies is displayed on the display screen 31, the illustration is abbreviate | omitted in FIG.

  Using the stylus pen, the operator moves (drags) the position of each gain adjustment operator 32 up and down so as to obtain a desired amplitude characteristic, and sets the gain at each frequency. Similarly, the phase at each frequency is set by moving the position of each phase adjustment operator 33 up and down so as to obtain the desired phase characteristics. Then, an amplitude characteristic curve 34 corresponding to the position of each gain adjustment operator 32 is displayed, and a phase characteristic curve 35 corresponding to the position of each phase adjustment operator 33 is displayed. Each gain adjusting operator 32 and each phase adjusting operator 33 are displayed as an initial state in which the gain or phase at each frequency is set to 0, for example, as an initial state where setting has never been performed. The

In the operation input unit 13 on which the above-described display screen 31 shown in FIG. 3 is displayed, for example, by touching a “confirm” button (not shown) on the display screen 31 with a stylus pen, The display information indicating the position of 32 and the display information indicating the position of each phase adjustment operator 33 are output to the arithmetic control unit 12. As a result, the amplitude characteristic and phase characteristic to be set in the FIR filter 11 are designated by the operation input unit 13. The arithmetic control unit 12 converts the display information of each gain adjustment operator 32 into amplitude characteristic information and converts the display information of each phase adjustment operator 33 into phase characteristic information, then the amplitude characteristic information and phase Based on the characteristic information, a filter coefficient h _k is obtained by performing an inverse FFT or the like, and is set in the FIR filter 11. The display information of each gain adjustment operator 32 is information about a wide interval frequency (for example, 31 Hz, 62 Hz,..., 8 kHz, 16 kHz as described above). Amplitude characteristic information is obtained by interpolating amplitude information (gain) regarding the frequency of the gap between these frequencies. Similarly, the display information of each phase adjustment operator 33 is also information on a wide interval frequency (for example, 31 Hz, 62 Hz,..., 8 kHz, 16 kHz as described above). Then, the phase characteristic information is obtained by interpolating the phase information regarding the frequency between these frequencies.

  When the gain or phase is set once and then the setting is changed next, before the change, each gain adjusting operation element 32 and each phase adjusting operation element 33 are in the state when they are set immediately before. The state before the change is displayed. From this state, the operating elements 32 and 33 are moved up and down to change the setting. At this time, in addition to the amplitude characteristic curve 34 and the phase characteristic curve 35 displayed corresponding to the positions of the operation elements 32 and 33, the amplitude characteristic curve 34a and the phase characteristic curve 35a before the change are displayed. Also good. This facilitates comparison between the amplitude characteristic and phase characteristic before the change and the amplitude characteristic and phase characteristic to be newly set.

  Each gain adjusting operator 32 and each phase adjusting operator 33 are not displayed on the screen as described above, but are configured by hardware that is actually operated by an operator by hand. May be.

  Note that the amplitude characteristic information is data of a numerical string representing the amplitude characteristic as shown in the graph of the amplitude characteristic curve 34, for example, and the phase characteristic information is the phase as shown in the graph of the phase characteristic curve 35, for example. It is data of a numerical sequence representing the characteristics.

(Second and third configuration examples)
FIG. 4 is a diagram illustrating a display screen of the operation input unit 13 of the second configuration example.

  In the case of the display screen 41 shown in FIG. 4, the upper area of the upper half is an area for specifying the amplitude characteristic (amplitude characteristic display area), and the lower area of the lower half is for specifying the phase characteristic. This is an area (phase characteristic display area).

  In the upper amplitude characteristic display area, for example, a line (amplitude characteristic line) 42 for displaying the amplitude characteristic set in the range of the audible frequency is displayed. The line 42 is in a state where the gain is set to 0 in the entire range of the audible frequency as an initial state, for example. Alternatively, it may be set to a state other than this. The operator uses the stylus pen to drag an arbitrary portion of the line 42 to form the line 42 showing a desired amplitude characteristic.

  In the lower phase characteristic display area, for example, a line (phase characteristic line) 43 for displaying the phase characteristic set within the range of the audible frequency is displayed. The line 43 is in a state where the phase is set to 0 in the entire range of the audible frequency as an initial state, for example. Alternatively, it may be set to a state other than this. The operator uses the stylus pen to drag an arbitrary portion of the line 43 to form the line 43 showing a desired phase characteristic.

  In the operation input unit 13 of the second configuration example described above, the arbitrary lines 42 and 43 are deformed to form the lines 42 and 43 indicating the desired characteristics. For example, the display screen 41 in the initial state is used. In FIG. 4, a screen other than the lines 42 and 43 is displayed and only the lines 42 and 43 are not displayed, and the operator draws the lines 42 and 43 indicating desired characteristics using a stylus pen. (This may be referred to as the operation input unit 13 of the third configuration example).

In the operation input unit 13 of the second and third configuration examples in which the display screen 41 shown in FIG. 4 described above is displayed, for example, a “confirm” button (not shown) on the display screen 41 is touched with a stylus pen. Thus, the display information of the line 42 and the display information of the line 43 are output to the arithmetic control unit 12. As a result, the amplitude characteristic and phase characteristic to be set in the FIR filter 11 are designated by the operation input unit 13. The arithmetic control unit 12 converts the display information of the line 42 into amplitude characteristic information and converts the display information of the line 43 into phase characteristic information. Then, based on the amplitude characteristic information and the phase characteristic information, an inverse FFT or the like is performed. A filter coefficient h _k is obtained by performing an operation, and is set in the FIR filter 11.

  When the operation input unit 13 of the first, second, and third configuration examples configured to display the display screen as shown in FIGS. 3 and 4 is used, the operator can display the display screen on the display screen. Thus, the desired amplitude characteristic and phase characteristic of the FIR filter 11 can be easily specified.

(Fourth configuration example)
Next, a fourth configuration example will be described. In the fourth configuration example, the arithmetic control unit 12 includes a storage unit including, for example, an internal memory of a microcomputer that constitutes the arithmetic control unit 12, and a plurality of amplitude characteristic information and a plurality of pieces of information regarding the FIR filter 11 are included therein. Are stored (stored) in advance. Then, by operating the operation input unit 13, desired amplitude characteristic information and phase characteristic information are selected from those stored in the storage unit. The operation input unit 13 in the case of the fourth configuration example is provided with, for example, an amplitude characteristic designation button corresponding to each of a plurality of amplitude characteristics and a phase characteristic designation button corresponding to each of the plurality of phase characteristics. These designation buttons may be a push button type that is actually selected and operated by a human hand, or may be displayed on the touch panel and selected by touching with a finger or a stylus pen. In either case, the operation for specifying the amplitude characteristic and the phase characteristic is easy. The operation input unit 13 outputs an amplitude characteristic selection signal corresponding to the selected amplitude characteristic designation button and a phase characteristic selection signal corresponding to the selected phase characteristic designation button to the arithmetic control unit 12. The arithmetic control unit 12 reads out the amplitude characteristic information and the phase characteristic information corresponding to each selection signal from the storage unit, and performs a computation such as inverse FFT based on the amplitude characteristic information and the phase characteristic information. The coefficient h _k is obtained and set in the FIR filter 11.

  In the fourth configuration example, the operation input unit 13 may be configured so that information stored in the storage unit in the arithmetic control unit 12 can be rewritten. For example, when the storage unit of the arithmetic control unit 12 stores the amplitude characteristic information and the phase characteristic information of the FIR filter 11 corresponding to the acoustic output apparatus configured by the amplifier 3 and the speaker 4, the acoustic output apparatus May be rewritten to the phase characteristic information and the amplitude characteristic information of the FIR filter 11 corresponding to the other acoustic output device. In this case, the operation input unit 13 is provided with reading means for reading information on a recording medium such as a flash memory and a CD, and new amplitude characteristic information and phase characteristic information read from the recording medium are stored (stored) in the storage unit. What is necessary is just to comprise. The recording medium may be distributed from an acoustic adjustment device or an acoustic device manufacturer, or a host computer such as an acoustic adjustment device or an acoustic device manufacturer by a user operating a personal computer (personal computer). Then, a new amplitude characteristic information and phase characteristic information file may be downloaded and recorded on a recording medium.

(Fifth configuration example)
Next, a fifth configuration example will be described. In the fifth configuration example, for example, the operation input unit 13 is provided with the gain at each of a plurality of preset frequencies from the initial state of the FIR filter 11 (for example, the gain is 0) or the amplitude characteristic set immediately before. An amplitude increase frequency designation button for increasing and an amplitude decrease frequency designation button for decreasing the gain are provided corresponding to each frequency, and the FIR filter 11 is set in the initial state (for example, the phase is 0) or immediately before. A phase advance frequency designation button for advancing the phase at each of a plurality of preset frequencies and a phase delay frequency designation button for delaying the phase are provided corresponding to each frequency. . When the above-mentioned plurality of preset frequencies are ten, ten amplitude increase frequency designation buttons, amplitude decrease frequency designation buttons, phase advance frequency designation buttons, and phase delay frequency designation buttons are provided. Each designation button corresponds to, for example, ones having frequencies of 31 Hz, 62 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, and 16 kHz. These designation buttons may be actually selected by a human hand, such as a push button type, or may be displayed on the touch panel and selected by touching with a finger or a stylus pen. .

  In this case, when a certain amplitude increase frequency designation button is selected and operated n times, the operation input unit 13 outputs a selection signal corresponding to the selected amplitude increase frequency designation button to the arithmetic control unit 12 n times. When the decrease frequency designation button is selected n times, a selection signal corresponding to the selected amplitude decrease frequency designation button is output to the arithmetic control unit 12 n times. When a certain phase advance frequency designation button is selected n times, a selection signal corresponding to the selected phase advance frequency designation button is output n times to the arithmetic control unit 12, and a certain phase delay frequency designation button is output. When n is selected n times, a selection signal corresponding to the selected phase delay frequency designation button is output to the arithmetic control unit 12 n times.

  The arithmetic control unit 12 increases the gain of the frequency corresponding to the amplitude increase frequency designation button for which the selection signal is output n times by a predetermined value × n with respect to the amplitude characteristic of the FIR filter 11 set immediately before. In addition, information for determining the changed amplitude characteristic is obtained by decreasing the gain of the frequency corresponding to the amplitude reduction frequency designation button for which the selection signal is output n times by a predetermined value × n, and the amplitude characteristic is based on the information. Ask for information. The predetermined value is a predetermined value. The information for determining the changed amplitude characteristics obtained by the selection signal of each amplitude increase frequency designation button and amplitude decrease frequency designation button is a frequency with a wide interval (for example, 31 Hz, 62 Hz,..., 8 kHz, 16 kHz as described above. ), The arithmetic control unit 12 interpolates amplitude information (gain) relating to the frequency gap between these frequencies to obtain amplitude characteristic information.

  In addition, the arithmetic control unit 12 sets the phase of the frequency corresponding to the phase advance frequency designation button for which the selection signal is output n times to a predetermined angle × n with respect to the phase characteristic of the FIR filter 11 set immediately before. In addition to determining the phase characteristic after the change by delaying the phase of the frequency corresponding to the phase delay frequency designation button for which the selection signal is output n times by a predetermined angle × n, Obtain phase characteristic information. The predetermined angle is a predetermined value. Information for determining the phase characteristics after change obtained by the selection signal of each phase advance frequency designation button and phase slow frequency designation button is a frequency with a wide interval (for example, 31 Hz, 62 Hz,..., 8 kHz as described above) , 16 kHz), the arithmetic control unit 12 interpolates the phase information related to the gap frequency between these frequencies to obtain the phase characteristic information.

Further, the arithmetic control unit 12 obtains a filter coefficient h _k by performing an inverse FFT or the like based on the amplitude characteristic information and the phase characteristic information obtained as described above, and sets it in the FIR filter 11. .

  When the operation input unit 13 of the fifth configuration example is used, the amplitude characteristic of the FIR filter 11 is changed by a simple operation such as pressing an amplitude increase frequency designation button and an amplitude decrease frequency designation button corresponding to the frequency whose amplitude is to be changed. can do. Further, the phase characteristics of the FIR filter 11 can be changed by a simple operation such as pressing a phase advance frequency designation button and a phase delay frequency designation button corresponding to the frequency whose phase is to be changed.

(Sixth configuration example)
FIG. 5 is a diagram illustrating a display screen of the operation input unit 13 of the sixth configuration example.

  Here, the operation input part 13 is comprised using the liquid crystal display which has the display screen 101, a keyboard, a mouse | mouth, etc., for example.

  In the case of the display screen 101 shown in FIG. 5, an amplitude characteristic display area for displaying the amplitude characteristic curve 102 or the like is arranged in the left area of the screen, and the phase characteristic for displaying the phase characteristic curve 103 or the like in the right area of the screen. A display area is arranged.

  Below the amplitude characteristic display area, respective operation buttons 104a, 104b for designating a set point number (No.), a center frequency (f), a frequency bandwidth (Q), and a gain (G) at the center frequency, 105a, 105b, 106a, 106b, 107a, and 107b and boxes 104, 105, 106, and 107 in which designated values are displayed are displayed. Similarly, below the phase characteristic display area, each operation button 108a for designating a set point number (No.), a center frequency (f), a frequency bandwidth (Q), and an angle (D) at the center frequency. , 108b, 109a, 109b, 110a, 110b, 111a, 111b and boxes 108, 109, 110, 111 in which designated values are displayed.

  The operator sets the center frequency, the frequency bandwidth, and the gain at the center frequency for each set point number (for example, 1, 2, 3,...) So as to obtain a desired amplitude characteristic. The operator can increase and decrease the set point number displayed in the box 104 by clicking the increase button 104a and the decrease button 104b using a mouse, for example. The center frequency displayed in the box 105 can be increased and decreased by clicking the increase button 105a and the decrease button 105b. Further, by clicking the increase button 106a and the decrease button 106b, the frequency bandwidth displayed in the box 106 can be increased or decreased. Further, the gain displayed in the box 107 can be increased and decreased by clicking the increase button 107a and the decrease button 107b.

  The operation input unit 13 outputs the amplitude setting information including the center frequency, the frequency bandwidth, and the gain for each set point number set by the above operation to the calculation control unit 12. The arithmetic control unit 12 obtains amplitude characteristic information based on each amplitude setting information. Display information for displaying the amplitude characteristic curve 102 is created based on the amplitude characteristic information, and the amplitude characteristic curve 102 is displayed on the display screen 101 of the operation input unit 13.

  Further, the operator sets the center frequency, the frequency bandwidth, and the angle at the center frequency for each set point number (for example, 1, 2, 3,...) So as to obtain a desired phase characteristic. The operator can increase and decrease the set point number displayed in the box 108 by clicking the increase button 108a and the decrease button 108b using, for example, a mouse. The center frequency displayed in the box 109 can be increased and decreased by clicking the increase button 109a and the decrease button 109b. Further, by clicking the increase button 110a and the decrease button 110b, the frequency bandwidth displayed in the box 110 can be increased and decreased. Further, by clicking the increase button 111a and the decrease button 111b, the angle displayed in the box 111 can be increased and decreased.

  The operation input unit 13 outputs the phase setting information including the center frequency, the frequency bandwidth, and the angle for each setting point number set by the above operation to the calculation control unit 12. The arithmetic control unit 12 obtains phase characteristic information based on each phase setting information. Display information for displaying the phase characteristic curve 103 is created based on the phase characteristic information, and the phase characteristic curve 103 is displayed on the display screen 101 of the operation input unit 13.

Further, the arithmetic control unit 12 obtains a filter coefficient h _k by performing an inverse FFT or the like based on the obtained amplitude characteristic information and phase characteristic information, and sets it in the FIR filter 11.

  Further, during the operation for changing the setting, the amplitude characteristic curve 102a and the phase characteristic curve 103a before the change may be displayed. This facilitates comparison between the amplitude characteristic and phase characteristic before the change and the amplitude characteristic and phase characteristic to be newly set.

  Further, during the operation for changing the setting, the target amplitude characteristic curve is displayed in the amplitude characteristic display area of the display screen 101, and the target phase characteristic curve is displayed in the phase characteristic display area. Also good. This makes it easy to create the amplitude characteristic curve and the phase characteristic curve so as to overlap the target amplitude characteristic curve and the target phase characteristic curve.

  Operation buttons (104a, 104b), (105a, 105b), (106a, 106b), (107a, 107b) for setting amplitude characteristics, and operation buttons (108a, 108b) for setting phase characteristics , (109a, 109b), (110a, 110b), (111a, 111b), for example, a slide bar or the like as shown by the operation elements 32, 33 in FIG. 3 may be used. Further, these operation buttons, slide bars, and other controls are not displayed on the screen as described above, and may be configured by hardware that is actually operated by the operator's hands. .

(Seventh configuration example)
FIG. 6 is a diagram illustrating a display screen of the operation input unit 13 of the seventh configuration example.

  In the case of the display screen 131 shown in FIG. 6, this is an amplitude characteristic drawing area for creating an amplitude characteristic curve indicating the amplitude characteristic specified by the upper area, and a phase characteristic curve indicating the phase characteristic specified by the lower area. This is a phase characteristic drawing area for creating

  The operation input unit 13 is configured using, for example, a liquid crystal display having a display screen 131, a keyboard, a mouse, and the like.

  When an operation start command is given by the operation input unit 13, a mountain-shaped amplitude characteristic curve 141 having a predetermined shape and size is displayed at a predetermined frequency position on the frequency axis in the amplitude characteristic drawing area of the display screen 131. At the same time, a mountain-shaped phase characteristic curve 151 having a predetermined shape and size is also displayed in the phase characteristic drawing area.

  The amplitude characteristic curve 141 has two operators 142 and 143. The operation element 142 is provided at the peak position in the center of the amplitude characteristic curve 141, and the operation element 143 is provided in the middle of the amplitude characteristic curve 141. The operator 142 can move (drag) the cursor in the vertical and horizontal directions of the screen by moving the cursor to the operator 142 with the mouse. In addition, the operator 143 can move (drag) the cursor in the horizontal direction of the screen by using the mouse to align the cursor with the operator 143.

  The peak gain of the amplitude characteristic curve 141 can be adjusted by moving the operation element 142 in the vertical direction. For example, when the operator 142 of the amplitude characteristic curve 141 is dragged upward, it expands to a similar state as shown by the amplitude characteristic curve 141a, for example, and when the mouse button is released, that is, when it is dropped, the enlargement is performed at that position. Stop. Further, when the operation element 142 is dragged downward, although not shown, the amplitude characteristic curve 141 is reduced in a similar shape.

  Further, the frequency (center frequency) that becomes the gain of the peak of the amplitude characteristic curve 141 can be changed by moving the operation element 142 in the left-right direction. For example, when the operator 142 of the enlarged amplitude characteristic curve 141a is dragged to the right, the amplitude characteristic curve 141a moves in the horizontal direction as indicated by, for example, the amplitude characteristic curve 141b, and the movement stops at the point where it is dropped.

  The frequency bandwidth of the amplitude characteristic curve 141 can be changed by moving the operator 143 in the left-right direction. For example, when the operator 143 of the amplitude characteristic curve 141b whose maximum gain and its frequency are moved is dragged horizontally toward the right direction, the slope of the amplitude characteristic curve becomes gentle as shown as the amplitude characteristic curve 141c. That is, the frequency bandwidth is increased. When the operator 143 is dragged leftward, the slope of the amplitude characteristic curve 141 becomes steep. That is, the frequency bandwidth is reduced. Such a change in inclination continues until dropping.

  By creating the amplitude characteristic curve by the operation as described above, the amplitude setting information including the center frequency, the frequency bandwidth, and the gain at one set point is determined. Further, by repeating the above-described operation a plurality of times, for example, an amplitude characteristic curve in an audible frequency range is created (drawn), and a center frequency, a frequency bandwidth, and a center frequency at each of a plurality of setting points corresponding thereto are drawn. Amplitude setting information including the gain at is determined.

  The phase characteristic curve 151 also has two operators 152 and 153. The operation element 152 is provided at the peak position in the center of the phase characteristic curve 151, and the operation element 153 is provided in the middle of the phase characteristic curve 151. The operator 152 can move (drag) the cursor in the vertical and horizontal directions of the screen by moving the cursor to the operator 152 with the mouse. In addition, the operator 153 can move (drag) the cursor in the horizontal direction of the screen by using the mouse to align the cursor with the operator 153.

  The peak angle (phase) of the phase characteristic curve 151 can be adjusted by moving the operation element 152 in the vertical direction. For example, if the operator 152 of the phase characteristic curve 151 is dragged upward, it expands to a similar state as shown by the phase characteristic curve 151a, for example, and if it is dropped, the expansion is stopped at that position. Further, when the operator 152 is dragged downward, the phase characteristic curve 151 is reduced in a similar state, although not shown.

  Further, the frequency (center frequency) that becomes the angle of the peak of the phase characteristic curve 151 can be changed by moving the operation element 152 in the left-right direction. For example, when the operator 152 of the enlarged phase characteristic curve 151a is dragged in the right direction, the phase characteristic curve 151a moves in the horizontal direction, for example, as indicated by the phase characteristic curve 151b, and the movement stops at the point where it is dropped.

  The frequency bandwidth of the phase characteristic curve 151 can be changed by moving the operator 153 in the left-right direction. For example, when the operator 153 of the phase characteristic curve 151b whose maximum angle and its frequency are moved is dragged horizontally toward the right direction, the slope of the phase characteristic curve becomes gentle as shown as the phase characteristic curve 151c. That is, the frequency bandwidth is increased. Further, when the operator 153 is dragged to the left, the slope of the phase characteristic curve 151 becomes steep. That is, the frequency bandwidth is reduced. Such a change in inclination continues until dropping.

  By creating the phase characteristic curve by the operation as described above, the phase setting information including the center frequency, the frequency bandwidth, and the gain at one setting point is determined. Further, by repeating the above-described operation a plurality of times, for example, a phase characteristic curve in an audible frequency range is created (drawn), and the center frequency, frequency bandwidth, and center frequency at each of a plurality of setting points corresponding thereto are drawn. Phase setting information consisting of the angle at is determined.

The operation input unit 13 outputs the amplitude setting information at each setting point and the phase setting information at each setting point set by the above operation to the calculation control unit 12. The arithmetic control unit 12 obtains amplitude characteristic information based on each amplitude setting information and obtains phase characteristic information based on each phase setting information. Based on the obtained amplitude characteristic information and phase characteristic information, an arithmetic operation such as inverse FFT is performed. To obtain a filter coefficient h _k and set it in the FIR filter 11.

  In addition, during the operation for changing the setting, the amplitude characteristic curve before the change is displayed in the amplitude characteristic drawing area of the display screen 131, and the phase characteristic curve before the change is displayed in the phase characteristic drawing area. Also good. This facilitates comparison between the amplitude characteristic and phase characteristic before the change and the amplitude characteristic and phase characteristic to be newly set.

  Further, during the operation for changing the setting, the target amplitude characteristic curve is displayed in the amplitude characteristic drawing area of the display screen 131, and the target phase characteristic curve is displayed in the phase characteristic drawing area. Also good. This makes it easy to create the amplitude characteristic curve and the phase characteristic curve so as to overlap the target amplitude characteristic curve and the target phase characteristic curve. In this case, information for displaying the target amplitude characteristic curve and the target phase characteristic curve is stored in the storage unit of the arithmetic control unit 12, for example.

(Eighth configuration example)
FIG. 7 is a diagram illustrating a display screen of the operation input unit 13 of the eighth configuration example.

  Here, the operation input part 13 is comprised using the liquid crystal display which has the display screen 161, a keyboard, a mouse | mouth, etc., for example.

  In the case of the display screen 161 shown in FIG. 7, a tabular amplitude characteristic setting file and a phase characteristic setting file are displayed. The set point numbers (No.) of both of these files are displayed in advance in the order of 1, 2, 3,.

  The operator operates a keyboard or the like, for example, and inputs desired values in the center frequency (f), frequency bandwidth (Q), and gain (G) at the center frequency of the amplitude characteristic setting file. Similarly, a desired value is entered in the center frequency (f), frequency bandwidth (Q), and angle (D) at the center frequency field of the phase characteristic setting file.

In the operation input unit 13, for each setting point number input to the amplitude characteristic setting file, each amplitude setting information including the center frequency, frequency bandwidth and gain, and each setting point number input to the phase characteristic setting file The phase setting information including the center frequency, the frequency bandwidth, and the angle is output to the arithmetic control unit 12. The arithmetic control unit 12 obtains amplitude characteristic information based on each amplitude setting information and obtains phase characteristic information based on each phase setting information. Further, the arithmetic control unit 12 obtains a filter coefficient h _k by performing an inverse FFT or the like based on the obtained amplitude characteristic information and phase characteristic information, and sets it in the FIR filter 11.

  In the eighth configuration example, the amplitude characteristic setting file and the phase characteristic setting file are created by the operation input unit 13, but the amplitude characteristic setting file and the phase characteristic are obtained using a personal computer other than the acoustic adjustment device. If a setting file is created and uploaded to the acoustic adjustment device, it is not necessary to provide a display for displaying the display screen 161 on the operation input unit 13 of the acoustic adjustment device, and the acoustic adjustment device has a simple configuration. Can be downsized.

  Further, in a personal computer or setting device other than the acoustic adjustment device, the display screen as shown in FIGS. 5 and 6 described above can be displayed, and amplitude setting information set in the same manner as in the sixth and seventh configuration examples and The phase setting information may be filed to create an amplitude characteristic setting file and a phase characteristic setting file, which may be uploaded to the acoustic adjustment device.

Further, the storage unit of the arithmetic control unit 12 stores information on a plurality of amplitude characteristic setting files corresponding to a plurality of amplitude characteristics (a plurality of amplitude characteristic specifying information) and a plurality of phase characteristic setting files corresponding to the plurality of phase characteristics. Information (a plurality of phase characteristic specifying information) is stored in advance, and the operation input unit 13 is used to select desired amplitude characteristic specifying information and phase from those stored in the storage unit as in the above-described fourth configuration example. You may comprise so that characteristic specific information may be selected. In this case, the arithmetic control unit 12 reads the amplitude characteristic specifying information and the phase characteristic specifying information from the storage unit according to the operation of the operation input unit 13, and includes the read amplitude characteristic specifying information (consisting of one or a plurality of amplitude setting information). Amplitude characteristic information based on the information), phase characteristic information based on the phase characteristic identification information (information including one or a plurality of phase setting information), and further based on the amplitude characteristic information and the phase characteristic information. A filter coefficient h _k is obtained and set in the FIR filter 11.

  As described above, in any case of the first to eighth configuration examples, for example, a button or a menu for flattening the phase characteristics may be provided in the set frequency range. This facilitates setting of flat phase characteristics (for example, the angle is 0 in the entire frequency range to be set). Similarly, in the frequency range to be set, for example, buttons and menus for flattening the amplitude characteristics may be provided. This facilitates the setting of flat amplitude characteristics (amplitude is constant in the set frequency range).

  In the present embodiment, the FIR filter 11 that can individually set the amplitude characteristic and the phase characteristic by setting the filter coefficient is used, and the amplitude characteristic and the phase characteristic of the FIR filter 11 are individually set. Therefore, it is possible to easily adjust the sound quality output from the speaker 4 according to the listener's preference and various uses. In particular, it is possible to adjust the sound quality output from the speaker 4 by delaying or advancing the phase of a certain frequency.

  As described above, in the present embodiment, the FIR filter 11 is used for acoustic adjustment. That is, digital signal processing technology is used.

  Since the phase characteristics of the FIR filter 11 can be set by using the operation input unit 13 as described above, various acoustics that could not be realized by the conventional acoustic adjustment methods. Adjustment is possible. Since the FIR filter 11 is used as described above, an arbitrary phase characteristic can be set. That is, an arbitrary phase characteristic can be given for each frequency. Moreover, it is possible to adjust the phase characteristics only in an arbitrary frequency range. For example, it is possible to change the phase of the input audio signal only in the frequency range from 100 Hz to 200 Hz and not to change the phase in other frequency ranges.

  Further, since the phase characteristic and the amplitude characteristic of the FIR filter 11 can be set using the operation input unit 13 as described above, the phase characteristic and the amplitude characteristic are set independently. Can do. That is, it is possible to change only the phase characteristic from the already set characteristic (phase characteristic) to another characteristic (phase characteristic) without changing the amplitude characteristic already set in the FIR filter 11.

  On the contrary, only the amplitude characteristic is changed from the already set characteristic (amplitude characteristic) to another characteristic (amplitude characteristic) without changing the phase characteristic already set in the FIR filter 11. You can also.

  Furthermore, both the phase characteristic and amplitude characteristic already set in the FIR filter 11 can be changed to different characteristics.

  Also, an amplitude characteristic that gives a constant gain regardless of the frequency is set for the FIR filter 11, and the phase characteristic of the FIR filter 11 is set so as to change only the phase characteristic of the audio signal. It is also possible to change the phase characteristics set in the FIR filter 11 in various ways.

  In particular, by advancing the phase without changing the amplitude, it becomes possible to make adjustments that could not be realized in the past, such as making the sound of the band with the advanced phase more audible and noisy. . Furthermore, since the phase characteristics can be changed in combination with the change of the amplitude characteristics, effective settings can be made for each of them, and more complicated and free acoustic adjustment can be performed.

  In addition, when it is desired to apply a certain desired phase characteristic to the input audio signal, the following may be performed. That is, the phase characteristic of the FIR filter 11 may be set so that the total phase characteristic of the sound output device including the amplifier 3 and the speaker 4 and the FIR filter 11 is the same as the desired phase characteristic. It is. More specifically, the difference between the phase characteristic of the sound output device composed of the amplifier 3 and the speaker 4 and the desired phase characteristic may be set as the phase characteristic of the FIR filter 11. For the input audio signal, the amplitude characteristic may not be changed, but only the phase characteristic may be changed. In addition, if desired phase characteristics are desired and at the same time desired amplitude characteristics are applied to the input audio signal, the amplitude characteristics of the sound output device including the amplifier 3 and the speaker 4 and the desired A difference from the amplitude characteristic may be set as the amplitude characteristic of the FIR filter 11.

For example, in the first configuration example to the third configuration example and the sixth to eighth configuration examples described above, the phase characteristic and the amplitude characteristic of the FIR filter 11 are designated by the operation input unit 13, but the amplifier 3 and the speaker 4 are designated. The total phase characteristic and amplitude characteristic of the sound output device constituted by the FIR filter 11 may be designated. In this case, the phase characteristic information and the amplitude characteristic information of the sound output device are stored in the storage unit of the arithmetic control unit 12. Then, the arithmetic control unit 12 obtains a difference between the information indicating the phase characteristic specified by the operation input unit 13 and the phase characteristic information of the sound output device, and uses the difference as the phase characteristic information of the FIR filter 11 on the display screen. The difference between the information representing the specified amplitude characteristic and the amplitude characteristic information of the sound output device is obtained and used as the amplitude characteristic information of the FIR filter 11. Further, the arithmetic control unit 12 obtains a filter coefficient h _k by performing an inverse FFT or the like based on the amplitude characteristic information and the phase characteristic information of the FIR filter 11 obtained as described above, and obtains the filter coefficient h _k by using the FIR filter. 11 is set.

  In this case, the phase characteristic information and the amplitude characteristic information of the sound output device stored in the storage unit of the arithmetic control unit 12 are obtained by measuring the characteristics of the sound output device constituted by the amplifier 3 and the speaker 4 by a known measuring means. This is information obtained by measurement. The arithmetic control unit 12 can rewrite the information stored in the storage unit, and when the sound output device is changed to another sound output device, the phase characteristic information and the amplitude characteristic information of the other sound output device. Can be stored in the storage unit. In this case, for example, the operation input unit 13 is provided with a reading unit that reads information on a recording medium such as a flash memory or a CD, and stores amplitude characteristic information and phase characteristic information of another acoustic output device read from the recording medium. What is necessary is just to comprise so that it may store in a part (memory | storage). The recording medium may be distributed from an acoustic adjustment device or an acoustic device manufacturer, or a host computer such as an acoustic adjustment device or an acoustic device manufacturer by a user operating a personal computer (personal computer). Then, a new amplitude characteristic information and phase characteristic information file may be downloaded and recorded on a recording medium.

In the fourth configuration example described above, the plurality of phase characteristic designation buttons and the plurality of amplitude characteristic designation buttons of the operation input unit 13 are used for designating (selecting) the phase characteristics and amplitude characteristics of the FIR filter 11. However, it may be configured to be used for designating (selecting) the overall phase characteristics and amplitude characteristics of the sound output device and the FIR filter 11. In this case, in the storage unit of the arithmetic control unit 12, the total phase characteristic information and amplitude characteristic information of the acoustic output device and the FIR filter 11 designated by the plurality of phase characteristic designation buttons and the plurality of amplitude characteristic designation buttons, and the acoustic The phase characteristic information and the amplitude characteristic information of the output device are stored. Then, the arithmetic control unit 12 obtains a difference between the phase characteristic information designated by the phase characteristic designation button and the phase characteristic information of the sound output device, and uses the difference as the phase characteristic information of the FIR filter 11 and designated by the amplitude characteristic designation button. The difference between the amplitude characteristic information thus obtained and the amplitude characteristic information of the sound output device is obtained and used as the amplitude characteristic information of the FIR filter 11. Further, the arithmetic control unit 12 obtains a filter coefficient h _k by performing an inverse FFT or the like based on the amplitude characteristic information and the phase characteristic information of the FIR filter 11 obtained as described above, and obtains the filter coefficient h _k by using the FIR filter. 11 is set.

  In this case, the phase characteristic information and the amplitude characteristic information of the sound output device stored in the storage unit of the arithmetic control unit 12 are obtained by measuring the characteristics of the sound output device constituted by the amplifier 3 and the speaker 4 by a known measuring means. This is information obtained by measurement. The arithmetic control unit 12 can rewrite the information stored in the storage unit, and when the sound output device is changed to another sound output device, the phase characteristic information and the amplitude characteristic information of the other sound output device. Can be stored in the storage unit. In addition, information on the overall phase characteristics and amplitude characteristics of the sound output device and the FIR filter 11 specified by the phase characteristics designation button and the amplitude characteristics designation button can be rewritten. In this way, the configuration for rewriting the information in the storage unit is similar to the case described above, and the operation input unit 13 is provided with reading means for reading information on a recording medium such as a flash memory and a CD, and the information is read from the recording medium. What is necessary is just to comprise so that new information may be stored (memory | storage) in a memory | storage part.

  Here, the information on the overall phase characteristics and amplitude characteristics of the acoustic output device and the FIR filter 11 stored in the storage unit of the arithmetic control unit 12 includes the phase characteristics and the like according to various uses for which the acoustic device is used. It is information on amplitude characteristics. Such information is configured, for example, when a speech is performed using an acoustic device, that is, a voice signal from a microphone is input to the input terminal IN after being A / D converted, and the speech is performed using the microphone. In this case, there is phase characteristic information and amplitude characteristic information suitable for making the listener speak the voice of the speaker clearly. When an emergency broadcast is performed using an acoustic device, that is, a digital audio signal output from a recording medium playback device such as a CD player is input to the input terminal IN, and an emergency announcement is made. When broadcast, there is phase characteristic information and amplitude characteristic information suitable for the listener, such as easy listening to the contents of the emergency announcement. In addition, when music (BGM) is played using an audio device, that is, a digital audio signal output from a recording medium playback device such as a CD player is input to the input terminal IN, and music is broadcast. In such a case, there are phase characteristic information and amplitude characteristic information suitable for the broadcast so that the broadcast is not harsh.

  The information stored in the storage unit of the arithmetic control unit 12 is classified by sound source such as “information for speech”, “information for music (pops)”, and “information for music (rock)”. The information may be stored and selected as information, or as information classified according to use, such as “information for store BGM”, “information for listening to music”, and “information for street speech”. It may be stored and selected, or may be stored and selected as information classified by image such as “clearly” and “softly”.

  Further, the phase characteristics of a specific speaker other than the speaker 4 can be simulated using the acoustic adjustment device 1. For that purpose, the phase characteristic of the acoustic adjustment device 1 may be set so that the total phase characteristic of the speaker 4 and the acoustic adjustment device 1 is the same as the phase characteristic of the other specific speaker.

  In other words, if the phase characteristics of other specific speakers and the phase characteristics of the existing speaker 4 are known, the difference between the phase characteristics of those speakers is set as the phase characteristic of the FIR filter 11, so that 4 can imitate the phase characteristics of other specific speakers. Here, the amplitude characteristic is not necessarily set so that the difference between the amplitude characteristic of another specific speaker and the amplitude characteristic of the existing speaker 4 is equal to the amplitude characteristic of the FIR filter 11. By setting the difference between the phase characteristic of the speaker and the phase characteristic of the existing speaker 4 to be equal to the phase characteristic of the FIR filter 11, another specific speaker can be imitated to some extent by the existing speaker 4. .

  When the amplitude characteristics of other specific speakers and the amplitude characteristics of the existing speaker 4 are known, the difference between the amplitude characteristics of those speakers is set as the amplitude characteristic of the FIR filter 11 and the existing speakers are set. In step 4, not only the phase characteristics of other specific speakers but also the amplitude characteristics may be imitated together.

  The arithmetic control unit 12 has a storage unit as described above, and can store frequency characteristic information and the like of the speaker therein.

  The storage unit of the arithmetic control unit 12 stores phase characteristic information and amplitude characteristic information of the speaker 4. The phase characteristic information and the amplitude characteristic information are information obtained by measuring the characteristics of the speaker 4 with a known measuring means.

  Further, phase characteristic information and amplitude characteristic information of other specific speakers other than the speaker 4 are also stored in the storage unit of the arithmetic control unit 12. The phase characteristic information and the amplitude characteristic information are also information obtained by measuring the characteristics of the other specific speaker by a known measuring means.

  Thus, the arithmetic control unit 12 has all the information necessary for simulating the phase characteristics and amplitude characteristics of other specific speakers by the FIR filter 11 and the speakers 4. Then, the arithmetic control unit 12 calculates phase characteristic information and amplitude characteristic information to be set in the FIR filter 11 from these pieces of information, further calculates a filter coefficient, and sets it in the FIR filter 11, thereby setting an existing speaker. 4 can imitate other specific speakers. In this case, information necessary for simulating the phase characteristics and amplitude characteristics of other specific speakers is stored in the storage unit of the arithmetic control unit 12 in advance, so that the operation input unit 13 is not used. Even if the operation input unit 13 is not provided, the existing speaker 4 can imitate other specific speakers. Further, if a filter coefficient that can be calculated based on the phase characteristic information and amplitude characteristic information to be set in the FIR filter 11 is stored in advance in the storage unit of the calculation control unit 12, the calculation control unit 12 stores the filter coefficient. Is set in the FIR filter 11, and other specific speakers can be imitated by the existing speakers 4.

  As described above, the storage unit of the arithmetic control unit 12 can store information on speaker characteristics and information on desired characteristics (phase characteristics and amplitude characteristics) according to various uses of the acoustic device. it can. For example, when giving a speech using an acoustic device, it is important that the voice of the speaker is clearly heard by the listener. If phase characteristic information and amplitude characteristic information suitable for clearly listening to the voice of speech are stored in the storage unit of the arithmetic control unit 12, the phase characteristic and amplitude corresponding to the use (representation) of the acoustic device. The characteristics can be set in the FIR filter 11. For example, in the storage unit of the arithmetic control unit 12, phase characteristic information and amplitude characteristic information suitable for clearly speaking a voice, and phase characteristic information and amplitude characteristic of an acoustic output device including the amplifier 3 and the speaker 4 If the information is stored in advance, phase characteristics and amplitude characteristics suitable for clearly speaking the voice can be realized by the combined phase characteristics and amplitude characteristics of the FIR filter 11 and the sound output device. In addition, the arithmetic control unit 12 calculates phase characteristic information and amplitude characteristic information to be set in the FIR filter 11, calculates filter coefficients, and sets them in the FIR filter 11, so that the voice can be heard clearly. Phase characteristics and amplitude characteristics suitable for the above can be realized. In this case, the operation input unit 13 is stored in the storage unit of the arithmetic control unit 12 by storing in advance information necessary for realizing phase characteristics and amplitude characteristics suitable for clearly speaking the voice. Without using it, that is, even without the operation input unit 13, it is possible to realize phase characteristics and amplitude characteristics suitable for clearly speaking speech. Further, if a filter coefficient that can be calculated based on the phase characteristic information and amplitude characteristic information to be set in the FIR filter 11 is stored in advance in the storage unit of the calculation control unit 12, the calculation control unit 12 stores the filter coefficient. Is set in the FIR filter 11, phase characteristics and amplitude characteristics suitable for clearly speaking speech can be realized. Similarly, when performing emergency broadcasting using an audio device, or when playing music (BGM) using an audio device, the arithmetic control unit 12 outputs phase characteristic information and amplitude characteristic information suitable for each case. If it is stored in the storage section, it is possible to set the phase characteristic and the amplitude characteristic according to the use of the acoustic device in the FIR filter 11.

  In the above embodiment, the D / A converter 2 may be included in the acoustic adjustment device 1. When an analog audio signal is input to the input terminal IN, an A / D (analog / digital) converter may be inserted between the input terminal IN and the FIR filter 11. A device may be included in the acoustic adjustment device 1.

  Further, the acoustic adjustment device 1 may be configured to adjust only the phase characteristic without changing the amplitude characteristic of the audio signal input to and output from the FIR filter 11. In this case, the operation input unit 13 does not require a configuration for adjusting the amplitude characteristic of the FIR filter 11.

[Second Embodiment; Acoustic Device]
FIG. 8 is a block diagram showing the configuration of the acoustic device according to the second embodiment of the present invention. Note that the housing 6 and the external output terminal OUT indicated by a two-dot chain line in FIG. 8 relate to a third embodiment described later, and do not exist in the second embodiment.

  This acoustic device is a speaker device that is a so-called speaker with a built-in amplifier, in which the acoustic adjustment device 1 is incorporated, and is connected to the acoustic adjustment device 1 that is a filter device and the acoustic adjustment device 1 in a housing 5. A D / A (digital / analog) converter 2 and a sound output device connected to the subsequent stage of the sound adjusting device 1 via the D / A converter 2 are provided.

  The sound output device includes an amplifier 3 connected to the D / A converter 2 and a speaker 4 connected to the amplifier 3.

  The acoustic adjustment device 1 includes an FIR (finite impulse response) filter 11, an arithmetic control unit 12 that functions as a filter coefficient setting unit, and an operation input unit 13 that functions as a change characteristic designation unit. The FIR filter 11 of the acoustic adjustment device 1 is inserted in the middle of a signal line connecting the external input terminal IN of the acoustic device and the D / A converter 2. Although the operation input unit 13 is shown inside the housing 5 in FIG. 8, a part or all of the operation input unit 13 is exposed to the outside of the housing 5 so that the operator can perform an operation.

  The FIR filter 11 performs digital signal processing. For example, a digital audio signal obtained by A / D converting an analog audio signal output from a microphone, or a digital audio signal output from a recording medium playback device such as a CD player, It is input via the external input terminal IN of the audio device. A signal that has been subjected to predetermined processing (filtering) by the FIR filter 11 is input to the D / A converter 2 to be converted into an analog signal, further amplified by the amplifier 3 and output to the speaker 4. Is output as a loud sound (acoustic signal).

  The acoustic adjustment device 1 has the same configuration as the acoustic adjustment device of the first embodiment. Therefore, the acoustic device of the present embodiment uses the FIR filter 11 that can obtain the same effect as that of the first embodiment and can individually set the amplitude characteristic and the phase characteristic by setting the filter coefficient. By individually setting the amplitude characteristic and the phase characteristic of the FIR filter 11, it is possible to easily adjust the sound quality output from the speaker 4 according to the listener's preference and various uses. In particular, it is possible to adjust the sound quality output from the speaker 4 by delaying or advancing the phase of a certain frequency.

  In the second embodiment described above, the configuration in which the acoustic adjustment device 1 is built in the amplifier built-in speaker has been described. However, various acoustic devices can be used as described in the following third to sixth embodiments. The sound adjusting device 1 according to the first embodiment can be built in.

[Third Embodiment; Acoustic Device]
The acoustic device according to the third embodiment has a configuration in which the acoustic adjustment device 1 is built in a so-called amplifier. In this configuration, the casing 5 is omitted in FIG. 8 and a casing 6 and an external output terminal OUT indicated by a two-dot chain line are provided.

  This acoustic device includes an acoustic adjustment device 1 that is a filter device, a D / A converter 2, and an amplifier 3 in a housing 6. In this case, the speaker 4 is connected as a sound output device downstream of the sound device. That is, the audio signal output from the amplifier 3 is input to the speaker 4 via the external output terminal OUT. Each component is as described in the second embodiment, and a detailed description thereof is omitted.

[Fourth Embodiment; Acoustic Device]
FIG. 9 is a block diagram showing the configuration of the acoustic device according to the fourth embodiment of the present invention.

  This acoustic device is one in which the acoustic adjustment device 1 is built in a loudspeaker, and a microphone 51, an A / D converter 52, an acoustic adjustment device 1 that is a filter device, and a D / A in a housing 7. A converter 2 and an amplifier 3 are provided. The microphone 51 converts an externally input acoustic signal into an audio signal and outputs the audio signal. The output audio signal is converted into a digital signal by the A / D converter 52 and input to the acoustic adjustment device 1. . The acoustic adjustment device 1, the D / A converter 2, the amplifier 3, and the speaker 4 have the same functions as those in FIG.

[Fifth Embodiment; Acoustic Device]
FIG. 10 is a block diagram showing the configuration of the acoustic device according to the fifth embodiment of the present invention.

  This acoustic device is a wireless tuner in which the acoustic adjustment device 1 is built, and in the housing 8, a reception circuit 61, a demodulation circuit 62, an acoustic adjustment device 1 that is a filter device, and a D / A converter. 2 are provided. In the case of FIG. 10, the amplifier 3 and the speaker 4 are connected as a sound output device at the subsequent stage of the sound device, and the output audio signal of this sound device is input to the amplifier 3 from the external output terminal 63. In the receiving circuit 61, for example, radio waves from a wireless microphone are received via an antenna (not shown), converted into an electrical signal, and output. This electrical signal is demodulated into an audio signal by the demodulation circuit 62 and input to the acoustic adjustment device 1. The acoustic adjustment device 1, the D / A converter 2, the amplifier 3, and the speaker 4 have the same functions as those in FIG.

[Sixth Embodiment; Acoustic Device]
FIG. 11 is a block diagram showing a configuration of an audio device according to the sixth embodiment of the present invention.

  This acoustic device is one in which the acoustic adjustment device 1 is built in an audio mixer, and includes a synthesis circuit 71, an acoustic adjustment device 1 that is a filter device, and a D / A converter 2 in a housing 9. Yes. In the case of FIG. 11, the amplifier 3 and the speaker 4 are connected as a sound output device at the subsequent stage of the sound device, and the output audio signal of this sound device is input to the amplifier 3 from the external output terminal 73. An external device is connected to each of the plurality of external input terminals 72, and an audio signal is input. For example, an audio signal from a microphone, an audio signal from a recording medium playback device such as a CD player, and the like are input to the external input terminal 72. In the synthesis circuit 71, the signals input from these external input terminals 72 are synthesized (added) and output to the acoustic adjustment device 1. The acoustic adjustment device 1, the D / A converter 2, the amplifier 3, and the speaker 4 have the same functions as those in FIG.

In FIG. 11, the acoustic adjustment device 1 is provided at the subsequent stage of the synthesis circuit 71. However, the acoustic adjustment device 1 is not provided at the subsequent stage. It is also possible to adopt a configuration provided in between.

Also in the second to sixth embodiments described above, the various configurations described in the first embodiment can be used as the configuration of the acoustic adjustment device 1, and the effects described in the first embodiment can be used. Can be obtained. Note that the phase characteristic and amplitude characteristic designation method, operation method, display method, and the like can be realized by the method described in the first embodiment.

  Furthermore, the display unit and the operation input unit may be provided in the acoustic device in each of the second to sixth embodiments, or may be configured by an external device (for example, a personal computer or a setting device). When configured by an external device, there is an advantage that an inexpensive and compact configuration is possible because it is not necessary to provide a display unit and an operation input unit in the acoustic device. Moreover, the setting can be made by remote control, and the effect that the setting can be easily changed even after the sound device is installed in the building is produced.

[Seventh embodiment; voice editing program]
FIG. 12A is a block diagram showing a configuration of a voice editing device that executes a voice editing program according to the seventh embodiment of the present invention, and FIG. 12B shows a voice file created by the voice editing device. It is a figure which shows an example of the audio equipment which reproduces | regenerates and outputs.

  This voice editing apparatus is composed of a computer including an editing processing unit 10, an operation input unit 13, a data reading unit (data extraction unit) 14, and a data writing unit (file creation unit) 17. The edit processing unit 10 includes a CPU, a ROM, a RAM, and the like. For example, a voice editing program is stored in the ROM, and the FIR filter (filter means) 11 is executed by the CPU executing the voice editing program. And functions as the arithmetic control unit 12 and the like. The first memory 15 and the second memory 16 are each configured by a predetermined storage area in, for example, a RAM. In FIG. 12A, the internal configuration of the editing processing unit 10 shows a functional configuration. The arithmetic control unit 12 functions as a filter characteristic changing unit that sets and changes the filter coefficient in the FIR filter 11 based on the operation of the operation input unit 13 and controls the operation of the entire voice editing apparatus. Note that the voice editing program may be processed by one CPU or may be distributedly processed by a plurality of CPUs.

  The data reading unit 14 is configured by a reading device for extracting and reading audio waveform data from a recording medium such as a flash memory in which a first file format audio file (first audio file) is recorded. The audio waveform data read by the reading unit 14 is stored in the first memory 15.

  In the FIR filter 11, the audio waveform data stored in the first memory 15 is sequentially input, subjected to filter processing, and output to the second memory 16. In the second memory, the sound waveform data subjected to the filter processing is sequentially input and stored.

  The data writing unit 17 sequentially reads out the voice waveform data stored in the second memory 16 and flashes it as a second file format voice file (second voice file) in which header information is added to the voice waveform data. A writing device for writing to a recording medium such as a memory.

  As is well known, the audio file is composed of header information and audio waveform data corresponding to the file format and the like. For example, the first file format is the WAVE format, and the second file format is also the WAVE format. Further, the second file format may be the MP3 format. When the first file format is the MP3 format, that is, when the data read by the data reading unit 14 is recorded in the MP3 format, the data reading unit 14 converts the data into PCM (Pulse Code Modulation) data. After the expansion, the speech waveform data may be extracted and stored in the first memory 15.

In order N FIR filter 11 filter length is N + 1, the output _{y n,} the filter coefficients _{h k,} by using the input _{x n-k,} is calculated by performing the calculation of a known number 1.

In such FIR filter 11, a phase frequency characteristic (phase characteristic) and the amplitude frequency characteristics (amplitude characteristics) By setting the filter coefficients h _k and is set.

The arithmetic control unit 12 derives a filter coefficient h _k corresponding to the operation of the operation input unit 13 and sets it in the FIR filter 11. In the case of first to third configuration examples to be described later, the arithmetic control unit 12 calculates a filter coefficient h _k corresponding to the amplitude characteristic and the phase characteristic specified by the operation of the operation input unit 13 and supplies the filter coefficient h _k to the FIR filter 11. Set. In this case, the filter coefficient h _k can be _obtained by performing inverse fast Fourier transform (inverse FFT) or the like on the information of the frequency characteristics (amplitude characteristics and phase characteristics).

  In the operation input unit 13, for example, an operation for designating an amplitude characteristic and a phase characteristic set in the FIR filter 11 is performed by the operator. In the case of first to third configuration examples described later, the operation input unit 13 is configured using, for example, a liquid crystal pen tablet that integrates a liquid crystal display and a pen tablet. In this case, a display screen for inputting amplitude characteristics and phase characteristics is displayed, and a stylus pen is used as a pointing device.

  FIG. 13 is a flowchart showing the operation of the voice editing apparatus realized by the CPU of the editing processing unit 10 executing the voice editing program.

  First, in step S1, the amplitude characteristic and phase characteristic of the FIR filter 11 designated by the operation of the operation input unit 13 are set.

  Next, in step S <b> 2, the data reading unit 14 sequentially extracts the audio waveform data from an existing recording medium such as a flash memory in which the first audio file is stored, and outputs it to the first memory 15. The first memory 15 stores voice waveform data output from the data reading unit 14.

  Next, in step S 3, the audio waveform data stored in the first memory 15 is sequentially input to the FIR filter 11, and the audio waveform data subjected to the filter processing by the FIR filter 11 is input to the second memory 16. Are stored sequentially.

  Next, in step S4, the data writing unit 17 sequentially reads the audio waveform data from the second memory 16, creates a second audio file with the header information added, and writes it to the recording medium.

  The second audio file recorded on this recording medium can be reproduced and output by, for example, an acoustic device shown in FIG.

  This audio device includes a recording medium reproduction device 18 that reproduces the second audio file, and an acoustic output device that is connected to a subsequent stage of the recording medium reproduction device 18. The sound output device includes an amplifier 3 connected to the recording medium playback device 18 and a speaker 4 connected to the amplifier 3. The audio signal (in this case, an analog audio signal) of the second audio file played back by the recording medium playback device 18 is amplified by the amplifier 3 and output to the speaker 4, and is output from the speaker 4 as a loud sound (acoustic signal). Is output. The recording medium playback device 18 is realized by, for example, a digital audio player or application software for music playback installed in a personal computer (personal computer).

  Hereinafter, each configuration example will be described. In each configuration example, the configurations and functions of the operation input unit 13 and the calculation control unit 12 are different, and the other portions are the same.

  In the present embodiment, setting / changing the filter coefficient means setting / changing a numerical value as a filter coefficient used for calculation for realizing the filtering process. The voice editing program is configured as a program for realizing not only the operation of the editing processing unit 10 described above but also the operation of the operation input unit 13.

(First configuration example)
The functions of the operation input unit 13 and the operation control unit 12 corresponding thereto in the first configuration example in the present embodiment are the same as those in the first configuration example in the first embodiment, and detailed description thereof is omitted.

  That is, the operation input unit 13 in the first configuration example in the present embodiment also has the display screen 31 shown in FIG. 3, and the operator can select the desired amplitude characteristic and phase characteristic of the FIR filter 11 on the display screen. Can be easily specified.

(Second and third configuration examples)
The functions of the operation input unit 13 and the operation control unit 12 corresponding thereto in the second and third configuration examples in this embodiment are the same as those in the second and third configuration examples in the first embodiment, and detailed description thereof is omitted. To do.

  That is, the operation input unit 13 in the second and third configuration examples in this embodiment also has the display screen 41 shown in FIG. 4, and the operator can select the desired amplitude characteristics of the FIR filter 11 on the display screen. It becomes possible to easily specify the phase characteristics.

(Fourth configuration example)
Next, a fourth configuration example will be described. In the fourth configuration example, the arithmetic control unit 12 includes a storage unit configured by, for example, a predetermined area of the RAM, and a plurality of amplitude characteristic information and a plurality of phase characteristic information related to the FIR filter 11 are included therein. Is stored (stored) in advance. Then, by operating the operation input unit 13, desired amplitude characteristic information and phase characteristic information are selected from those stored in the storage unit. The operation input unit 13 in the case of the fourth configuration example is provided with, for example, an amplitude characteristic designation button corresponding to each of a plurality of amplitude characteristics and a phase characteristic designation button corresponding to each of the plurality of phase characteristics. These designation buttons may be a push button type that is actually selected and operated by a human hand, or may be displayed on the touch panel and selected by touching with a finger or a stylus pen. In either case, the operation for specifying the amplitude characteristic and the phase characteristic is easy. The operation input unit 13 outputs an amplitude characteristic selection signal corresponding to the selected amplitude characteristic designation button and a phase characteristic selection signal corresponding to the selected phase characteristic designation button to the arithmetic control unit 12. The arithmetic control unit 12 reads out the amplitude characteristic information and the phase characteristic information corresponding to each selection signal from the storage unit, and performs a computation such as inverse FFT based on the amplitude characteristic information and the phase characteristic information. The coefficient h _k is obtained and set in the FIR filter 11.

  In the fourth configuration example, the operation input unit 13 may be configured so that information stored in the storage unit in the arithmetic control unit 12 can be rewritten. For example, when the storage unit of the arithmetic control unit 12 stores the amplitude characteristic information and the phase characteristic information of the FIR filter 11 corresponding to the acoustic output apparatus configured by the amplifier 3 and the speaker 4, the acoustic output apparatus May be rewritten to the phase characteristic information and the amplitude characteristic information of the FIR filter 11 corresponding to the other acoustic output device. In this case, the operation input unit 13 is provided with reading means for reading information on a recording medium such as a flash memory and a CD, and new amplitude characteristic information and phase characteristic information read from the recording medium are stored (stored) in the storage unit. What is necessary is just to comprise. The recording medium may be distributed from a voice editing device or an audio device manufacturer, or a host computer such as a voice editing device or an audio device manufacturer by a user operating a personal computer (personal computer). Then, a new amplitude characteristic information and phase characteristic information file may be downloaded and recorded on a recording medium. In the case where the voice editing device is constituted by the above personal computer, the downloaded file may be stored in a storage unit in the personal computer.

(Fifth configuration example)
Next, a fifth configuration example will be described. In the fifth configuration example, for example, the operation input unit 13 is provided with the gain at each of a plurality of preset frequencies from the initial state of the FIR filter 11 (for example, the gain is 0) or the amplitude characteristic set immediately before. An amplitude increase frequency designation button for increasing and an amplitude decrease frequency designation button for decreasing the gain are provided corresponding to each frequency, and the FIR filter 11 is set in the initial state (for example, the phase is 0) or immediately before. A phase advance frequency designation button for advancing the phase at each of a plurality of preset frequencies and a phase delay frequency designation button for delaying the phase are provided corresponding to each frequency. . The functions of the operation input unit 13 and the operation control unit 12 corresponding to the operation input unit 13 are the same as in the fifth configuration example in the first embodiment, and detailed description thereof is omitted.

When the operation input unit 13 of the fifth configuration example is used, the amplitude characteristic of the FIR filter 11 is changed by a simple operation such as pressing an amplitude increase frequency designation button and an amplitude decrease frequency designation button corresponding to the frequency whose amplitude is to be changed. can do. Further, the phase characteristics of the FIR filter 11 can be changed by a simple operation such as pressing a phase advance frequency designation button and a phase delay frequency designation button corresponding to the frequency whose phase is to be changed.

(Sixth to eighth configuration examples)
The functions of the operation input unit 13 and the operation control unit 12 corresponding thereto in the sixth to eighth configuration examples in the present embodiment are the same as those in the sixth to eighth configuration examples in the first embodiment, and detailed description thereof is omitted. To do.

  In the present embodiment, the FIR filter 11 that can individually set the amplitude characteristic and the phase characteristic by setting the filter coefficient is used, and the amplitude characteristic and the phase characteristic of the FIR filter 11 are individually set. Accordingly, it is possible to create an audio file in which the sound quality when output from the speaker 4 is adjusted according to the listener's preference and various uses. In particular, by delaying or advancing the phase of a certain frequency, it is possible to create an audio file in which the sound quality when output from the speaker 4 is adjusted.

  As described above, in the present embodiment, the FIR filter 11 is used for audio data editing processing. That is, digital signal processing technology is used.

  Since the phase characteristic of the FIR filter 11 can be set using the operation input unit 13 as described above, various sound qualities that cannot be realized by the conventional acoustic adjustment methods. It is possible to create an audio file that has been adjusted. Since the FIR filter 11 is used as described above, an arbitrary phase characteristic can be set. That is, an arbitrary phase characteristic can be given for each frequency. Moreover, it is possible to adjust the phase characteristics only in an arbitrary frequency range. For example, it is possible to change the phase of the audio signal only in the frequency range from 100 Hz to 200 Hz and not to change the phase in other frequency ranges.

  Further, since the phase characteristic and the amplitude characteristic of the FIR filter 11 can be set using the operation input unit 13 as described above, the phase characteristic and the amplitude characteristic are set independently. Can do. That is, it is possible to change only the phase characteristic from the already set characteristic (phase characteristic) to another characteristic (phase characteristic) without changing the amplitude characteristic already set in the FIR filter 11.

  On the contrary, only the amplitude characteristic is changed from the already set characteristic (amplitude characteristic) to another characteristic (amplitude characteristic) without changing the phase characteristic already set in the FIR filter 11. You can also.

  Furthermore, both the phase characteristic and amplitude characteristic already set in the FIR filter 11 can be changed to different characteristics.

  Also, an amplitude characteristic that gives a constant gain regardless of the frequency is set for the FIR filter 11, and the phase characteristic of the FIR filter 11 is set so as to change only the phase characteristic of the audio signal. You can also.

  In particular, by advancing the phase without changing the amplitude, it becomes possible to make adjustments that could not be realized in the past, such as making the sound of the band with the advanced phase more audible and noisy. . Furthermore, since the phase characteristics can be changed in combination with the change of the amplitude characteristics, it is possible to make effective settings for each of them, and it is possible to create an audio file with more complex and free sound quality adjustment.

  Further, when it is desired to apply a certain desired phase characteristic to the audio signal, the following may be performed. That is, for example, if the phase characteristics of the FIR filter 11 are set so that the total phase characteristics of the acoustic output device including the amplifier 3 and the speaker 4 and the FIR filter 11 are the same as the desired phase characteristics. It's good. More specifically, the difference between the phase characteristic of the sound output device composed of the amplifier 3 and the speaker 4 and the desired phase characteristic may be set as the phase characteristic of the FIR filter 11. Further, the amplitude characteristic may not be changed with respect to the audio signal, but only the phase characteristic may be changed. In addition, when desired phase characteristics are desired and at the same time desired amplitude characteristics are to be applied to the audio signal, the amplitude characteristics of the sound output device including the amplifier 3 and the speaker 4 and the desired amplitude characteristics. Is set as an amplitude characteristic of the FIR filter 11.

For example, in the first to third configuration examples described above, the phase characteristic and the amplitude characteristic of the FIR filter 11 are specified on the display screen of the operation input unit 13. Alternatively, the overall phase characteristic and amplitude characteristic of the sound output device constituted by the speaker 4 and the FIR filter 11 may be designated. In this case, the phase characteristic information and the amplitude characteristic information of the sound output device are stored in the storage unit of the arithmetic control unit 12. Then, the arithmetic control unit 12 obtains a difference between the information indicating the phase characteristic specified on the display screen and the phase characteristic information of the sound output device, and uses it as the phase characteristic information of the FIR filter 11 to specify on the display screen. The difference between the information representing the amplitude characteristic thus obtained and the amplitude characteristic information of the sound output device is obtained and used as the amplitude characteristic information of the FIR filter 11. Further, the arithmetic control unit 12 obtains a filter coefficient h _k by performing an inverse FFT or the like based on the amplitude characteristic information and the phase characteristic information of the FIR filter 11 obtained as described above, and obtains the filter coefficient h _k by using the FIR filter. 11 is set.

  In this case, the phase characteristic information and the amplitude characteristic information of the sound output device stored in the storage unit of the arithmetic control unit 12 are obtained by measuring the characteristics of the sound output device constituted by the amplifier 3 and the speaker 4 by a known measuring means. This is information obtained by measurement. The arithmetic control unit 12 can rewrite the information stored in the storage unit, and when the sound output device is changed to another sound output device, the phase characteristic information and the amplitude characteristic information of the other sound output device. Can be stored in the storage unit. In this case, for example, the operation input unit 13 is provided with a reading unit that reads information on a recording medium such as a flash memory or a CD, and stores amplitude characteristic information and phase characteristic information of another acoustic output device read from the recording medium. What is necessary is just to comprise so that it may store in a part (memory | storage). The recording medium may be distributed from a voice editing device or an audio device manufacturer, or a host computer such as a voice editing device or an audio device manufacturer operated by a user operating a personal computer (personal computer). Then, a new amplitude characteristic information and phase characteristic information file may be downloaded and recorded on a recording medium. In the case where the voice editing device is constituted by the above personal computer, the downloaded file may be stored in a storage unit in the personal computer.

In the fourth configuration example described above, the plurality of phase characteristic designation buttons and the plurality of amplitude characteristic designation buttons of the operation input unit 13 are used to designate the phase characteristic and the amplitude characteristic of the FIR filter 11, You may comprise so that it may be used in order to designate the total phase characteristic and amplitude characteristic of an acoustic output device and FIR filter 11. FIG. In this case, in the storage unit of the arithmetic control unit 12, the total phase characteristic information and amplitude characteristic information of the acoustic output device and the FIR filter 11 designated by the plurality of phase characteristic designation buttons and the plurality of amplitude characteristic designation buttons, and the acoustic The phase characteristic information and the amplitude characteristic information of the output device are stored. Then, the arithmetic control unit 12 obtains a difference between the phase characteristic information designated by the phase characteristic designation button and the phase characteristic information of the sound output device, and uses the difference as the phase characteristic information of the FIR filter 11 and designated by the amplitude characteristic designation button. The difference between the amplitude characteristic information thus obtained and the amplitude characteristic information of the sound output device is obtained and used as the amplitude characteristic information of the FIR filter 11. Further, the arithmetic control unit 12 obtains a filter coefficient h _k by performing an inverse FFT or the like based on the amplitude characteristic information and the phase characteristic information of the FIR filter 11 obtained as described above, and obtains the filter coefficient h _k by using the FIR filter. 11 is set.

  In this case, the phase characteristic information and the amplitude characteristic information of the sound output device stored in the storage unit of the arithmetic control unit 12 are obtained by measuring the characteristics of the sound output device constituted by the amplifier 3 and the speaker 4 by a known measuring means. This is information obtained by measurement. The arithmetic control unit 12 can rewrite the information stored in the storage unit, and when the sound output device is changed to another sound output device, the phase characteristic information and the amplitude characteristic information of the other sound output device. Can be stored in the storage unit. In addition, information on the overall phase characteristics and amplitude characteristics of the sound output device and the FIR filter 11 specified by the phase characteristics designation button and the amplitude characteristics designation button can be rewritten. In this way, the configuration for rewriting the information in the storage unit is similar to the above-described case, for example, the operation input unit 13 is provided with reading means for reading information on a recording medium such as a flash memory and a CD, and the information is read from the recording medium. New information may be stored (stored) in the storage unit.

  Here, the information on the total phase characteristics and amplitude characteristics of the acoustic output device and the FIR filter 11 stored in the storage unit of the arithmetic control unit 12 is the phase characteristics and amplitudes according to various uses in which the acoustic device is used. This is characteristic information. As such information, for example, when an emergency announcement is broadcast using an audio device, that is, a recording medium such as a flash memory in which an emergency announcement is recorded is reproduced by a recording medium reproduction device. When an emergency announcement is broadcast, there is phase characteristic information and amplitude characteristic information suitable for the listener, such as easy listening to the contents of the emergency announcement. In addition, when music (BGM) is played using an audio device, that is, when a recording medium such as a flash memory in which music is recorded is reproduced by a recording medium reproduction device and the music is broadcasted. There are phase characteristic information, amplitude characteristic information, and the like suitable for it, such as broadcasting is not harsh.

  Further, the phase characteristics of a specific speaker other than the speaker 4 can be simulated using the audio file created by the audio editing apparatus and the speaker 4. For this purpose, the phase characteristics of the voice editing device may be set so that the total phase characteristics of the speaker 4 and the voice editing device are the same as the phase characteristics of the other specific speakers.

  In other words, if the phase characteristics of other specific speakers and the phase characteristics of the existing speaker 4 are known, the difference between the phase characteristics of those speakers is set as the phase characteristic of the FIR filter 11, so that 4 can imitate the phase characteristics of other specific speakers. Here, the amplitude characteristic is not necessarily set so that the difference between the amplitude characteristic of another specific speaker and the amplitude characteristic of the existing speaker 4 is equal to the amplitude characteristic of the FIR filter 11. By setting the difference between the phase characteristic of the speaker and the phase characteristic of the existing speaker 4 to be equal to the phase characteristic of the FIR filter 11, another specific speaker can be imitated to some extent by the existing speaker 4. .

  When the amplitude characteristics of other specific speakers and the amplitude characteristics of the existing speaker 4 are known, the difference between the amplitude characteristics of those speakers is set as the amplitude characteristic of the FIR filter 11 and the existing speakers are set. In step 4, not only the phase characteristics of other specific speakers but also the amplitude characteristics may be imitated together.

  The arithmetic control unit 12 has a storage unit as described above, and can store frequency characteristic information and the like of the speaker therein.

  The storage unit of the arithmetic control unit 12 stores phase characteristic information and amplitude characteristic information of the speaker 4. The phase characteristic information and the amplitude characteristic information are information obtained by measuring the characteristics of the speaker 4 with a known measuring means.

  Further, phase characteristic information and amplitude characteristic information of other specific speakers other than the speaker 4 are also stored in the storage unit of the arithmetic control unit 12. The phase characteristic information and the amplitude characteristic information are also information obtained by measuring the characteristics of the other specific speaker by a known measuring means.

  As described above, the arithmetic control unit 12 has all information necessary for simulating the phase characteristics and amplitude characteristics of other specific speakers by the created audio file and the speakers 4. Then, the calculation control unit 12 calculates phase characteristic information and amplitude characteristic information to be set in the FIR filter 11 from these pieces of information, and further calculates a filter coefficient and sets it in the FIR filter 11. Another specific speaker can be imitated by the existing speaker 4 using the audio file. In this case, information necessary for simulating the phase characteristics and amplitude characteristics of other specific speakers is stored in the storage unit of the arithmetic control unit 12 in advance, so that the operation input unit 13 is not used. Even if the desired amplitude characteristics and phase characteristics are not specified by the operation input unit 13, it is possible to imitate other specific speakers with the existing speaker 4 using the created audio file. Further, if a filter coefficient that can be calculated based on the phase characteristic information and amplitude characteristic information to be set in the FIR filter 11 is stored in advance in the storage unit of the calculation control unit 12, the calculation control unit 12 stores the filter coefficient. Is set in the FIR filter 11, and other specific speakers can be imitated by the existing speaker 4 using the created audio file.

  As described above, the storage unit of the arithmetic control unit 12 can store information on speaker characteristics and information on desired characteristics (phase characteristics and amplitude characteristics) according to various uses of the acoustic device. it can. By storing the phase characteristic information and amplitude characteristic information according to the application (performance) of the audio device in the storage unit of the arithmetic control unit 12, the phase characteristic and amplitude characteristic according to the application (performance) of the audio device can be changed to the FIR filter. 11 can be set. For example, phase characteristic information and amplitude characteristic information suitable for broadcasting an emergency announcement, and phase characteristic information and amplitude of an acoustic output device including the amplifier 3 and the speaker 4 are stored in the storage unit of the arithmetic control unit 12. If characteristic information is stored in advance, phase characteristics and amplitude characteristics suitable for broadcasting an emergency announcement can be realized by combining the phase characteristics and amplitude characteristics of the FIR filter 11 and the sound output device. As described above, the arithmetic control unit 12 calculates phase characteristic information and amplitude characteristic information to be set in the FIR filter 11, calculates a filter coefficient, and sets it in the FIR filter 11, thereby broadcasting an emergency announcement. It is possible to realize phase characteristics and amplitude characteristics suitable for performing the above. In this case, the operation input unit 13 is stored in the storage unit of the arithmetic control unit 12 by storing in advance information necessary for realizing phase characteristics and amplitude characteristics suitable for clearly speaking the voice. Without use, that is, without specifying the desired amplitude characteristics and phase characteristics by the operation input unit 13, it is possible to realize phase characteristics and amplitude characteristics suitable for broadcasting an emergency announcement. is there. Further, if a filter coefficient that can be calculated based on the phase characteristic information and amplitude characteristic information to be set in the FIR filter 11 is stored in advance in the storage unit of the calculation control unit 12, the calculation control unit 12 stores the filter coefficient. Is set in the FIR filter 11, phase characteristics and amplitude characteristics suitable for broadcasting emergency announcements can be realized. Similarly, when music (BGM) is played using an acoustic device, if phase characteristic information and amplitude characteristic information suitable for that case are stored in the storage unit of the arithmetic control unit 12, it can be used for the acoustic device. Corresponding phase characteristics and amplitude characteristics can be set in the FIR filter 11.

  Further, the audio editing apparatus may be configured to adjust only the phase characteristic without changing the amplitude characteristic of the audio signal input to and output from the FIR filter 11. In this case, the operation input unit 13 does not require a configuration for adjusting the amplitude characteristic of the FIR filter 11.

  In the present embodiment, the phase characteristic and amplitude characteristic designation method, operation method, display method, and the like can be realized by the method described in the first embodiment.

  From the foregoing description, many modifications and other embodiments of the present invention are obvious to one skilled in the art. Accordingly, the foregoing description should be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the invention. The details of the structure and / or function may be substantially changed without departing from the spirit of the invention.

  INDUSTRIAL APPLICABILITY The present invention is useful as an acoustic adjustment device, an acoustic device, and the like for easily adjusting the sound quality according to the listener's preference and various uses. Further, the present invention is useful as an audio editing program or the like that can create an audio file whose sound quality has been adjusted according to the listener's preference and various uses.

Claims (113)

A finite impulse response filter (hereinafter referred to as “FIR filter”) that outputs the input audio signal after performing filter processing according to a set filter coefficient;
Change characteristic designating means for designating the phase frequency characteristic of the FIR filter to be realized after the change in order to change the phase frequency characteristic of the FIR filter;
An acoustic adjustment apparatus comprising: a filter coefficient setting unit that sets a filter coefficient corresponding to the phase frequency characteristic specified by the change characteristic specifying unit in the FIR filter. The change characteristic designation means includes:
Display means for displaying on the screen a phase adjustment operator for setting a phase corresponding to the display position for each of a plurality of predetermined frequencies, and for the phase adjustment displayed on the screen of the display means Operating means for changing the display position of the operation element, and configured to specify the phase frequency characteristics of the FIR filter according to the display position of the phase adjustment operation element changed by the operation means,
The filter coefficient setting means includes
After obtaining phase characteristic information which is information representing the phase frequency characteristic based on the phase frequency characteristic designated by the change characteristic designation means, a filter coefficient is calculated based on the phase characteristic information and set in the FIR filter The acoustic adjustment device according to claim 1, which is configured to do so. The change characteristic designation means includes:
A phase adjustment operator is provided for setting a phase corresponding to the operation position for each of a plurality of predetermined frequencies, and the phase frequency characteristics of the FIR filter are designated by the operation position of the phase adjustment operator Configured to
The filter coefficient setting means includes
After obtaining phase characteristic information which is information representing the phase frequency characteristic based on the phase frequency characteristic designated by the change characteristic designation means, a filter coefficient is calculated based on the phase characteristic information and set in the FIR filter The acoustic adjustment device according to claim 1, which is configured to do so. The change characteristic designation means includes:
A display means for displaying a phase frequency characteristic of the FIR filter on a screen; and an operating means for changing a phase frequency characteristic preliminarily displayed on the screen of the display means, the phase changed by the operating means. A phase frequency characteristic of the FIR filter is designated by a frequency characteristic;
The filter coefficient setting means includes
After obtaining phase characteristic information which is information representing the phase frequency characteristic based on the phase frequency characteristic designated by the change characteristic designation means, a filter coefficient is calculated based on the phase characteristic information and set in the FIR filter The acoustic adjustment device according to claim 1, which is configured to do so. The change characteristic designation means includes:
A display means for displaying a phase characteristic display area on a screen; and an operation means for drawing a phase frequency characteristic curve in the phase characteristic display area of the screen of the display means. The phase frequency drawn by the operation means It is configured to specify the phase frequency characteristic of the FIR filter by a characteristic curve,
The filter coefficient setting means includes
After obtaining phase characteristic information which is information representing the phase frequency characteristic based on the phase frequency characteristic designated by the change characteristic designation means, a filter coefficient is calculated based on the phase characteristic information and set in the FIR filter The acoustic adjustment device according to claim 1, which is configured to do so. The change characteristic designation means includes:
It has an operation means for selecting one phase frequency characteristic from a plurality of phase frequency characteristics, and is configured to designate the phase frequency characteristic of the FIR filter by the phase frequency characteristic selected by the operation means,

The filter coefficient setting means includes

A plurality of phase characteristic information which is information representing each of the phase frequency characteristics of the plurality of FIR filters that can be specified by the change characteristic specifying means; The phase coefficient information corresponding to the phase frequency characteristic designated by the designation means is obtained from the storage means, and then a filter coefficient is calculated based on the phase characteristic information and set in the FIR filter. The acoustic adjustment device according to 1.   The acoustic adjustment device according to claim 6, wherein the storage unit of the filter coefficient setting unit is configured to rewrite the stored phase characteristic information. The change characteristic designation means includes:
It has an operation means for selecting one phase frequency characteristic from a plurality of phase frequency characteristics, and is configured to designate the phase frequency characteristic of the FIR filter by the phase frequency characteristic selected by the operation means,
The filter coefficient setting means includes
A plurality of filter coefficients corresponding to each of a plurality of phase frequency characteristics of the plurality of FIR filters that can be specified by the change characteristic specifying means; The acoustic adjustment device according to claim 1, wherein a filter coefficient corresponding to a characteristic is acquired from the storage unit and set in the FIR filter. The change characteristic designation means includes:
An input unit for inputting phase setting information including a center frequency, a frequency bandwidth, and an angle, and a phase frequency characteristic of the FIR filter are designated by one or a plurality of the phase setting information input from the input unit. And
The filter coefficient setting means includes
After obtaining phase characteristic information which is information representing the phase frequency characteristic based on the phase frequency characteristic designated by the change characteristic designation means, a filter coefficient is calculated based on the phase characteristic information and set in the FIR filter The acoustic adjustment device according to claim 1, which is configured to do so. The change characteristic designation means includes:
It has an operation means for selecting one phase frequency characteristic from a plurality of phase frequency characteristics, and is configured to designate the phase frequency characteristic of the FIR filter by the phase frequency characteristic selected by the operation means,

The filter coefficient setting means includes

Information corresponding to each of a plurality of phase frequency characteristics of the FIR filter that can be specified by the change characteristic specifying means, the phase characteristics including one or a plurality of phase setting information including a center frequency, a frequency bandwidth, and an angle Based on the phase characteristic identification information, after acquiring phase characteristic identification information corresponding to the phase frequency characteristic designated by the change characteristic designation means from the storage means, having a plurality of specific information stored in advance. The sound adjustment device according to claim 1, wherein the filter coefficient is calculated and set in the FIR filter.
The change characteristic specifying means is further configured to specify an amplitude frequency characteristic of the FIR filter to be realized after the change in order to change the amplitude frequency characteristic of the FIR filter,
2. The acoustic adjustment device according to claim 1, wherein the filter coefficient setting unit is configured to set a filter coefficient corresponding to an amplitude frequency characteristic and a phase frequency characteristic specified by the change characteristic specifying unit in the FIR filter. .

The change characteristic designation means includes:
A gain adjusting operator for setting a gain corresponding to a display position for each of a plurality of predetermined frequencies; a phase adjusting operator for setting a phase corresponding to the display position for each frequency; Display means for displaying on the screen, and operation means for changing the display position of the gain adjustment operator and the display position of the phase adjustment operator displayed on the screen of the display means. The amplitude frequency characteristic of the FIR filter is designated by the display position of the gain adjusting operator changed by the operating means, and the FIR filter is controlled by the display position of the phase adjusting operator changed by the operating means. Configured to specify phase frequency characteristics,
The filter coefficient setting means includes
Amplitude characteristic information, which is information representing the amplitude frequency characteristic, is obtained based on the amplitude frequency characteristic designated by the change characteristic designation means, and the phase frequency characteristic is obtained based on the phase frequency characteristic designated by the change characteristic designation means. The acoustic adjustment according to claim 11, configured to calculate a filter coefficient based on the amplitude characteristic information and the phase characteristic information after obtaining phase characteristic information that is information to be expressed, and to set the filter coefficient in the FIR filter. apparatus. The change characteristic designation means includes:
A gain adjusting operator for setting a gain corresponding to an operation position for each of a plurality of predetermined frequencies; a phase adjusting operator for setting a phase corresponding to the operation position for each frequency; And specifying the amplitude frequency characteristic of the FIR filter according to the operation position of the gain adjustment operator, and specifying the phase frequency characteristic of the FIR filter according to the operation position of the phase adjustment operator,
The filter coefficient setting means includes
Amplitude characteristic information, which is information representing the amplitude frequency characteristic, is obtained based on the amplitude frequency characteristic designated by the change characteristic designation means, and the phase frequency characteristic is obtained based on the phase frequency characteristic designated by the change characteristic designation means. The acoustic adjustment according to claim 11, configured to calculate a filter coefficient based on the amplitude characteristic information and the phase characteristic information after obtaining phase characteristic information that is information to be expressed, and to set the filter coefficient in the FIR filter. apparatus. The change characteristic designation means includes:
Display means for displaying amplitude frequency characteristics and phase frequency characteristics of the FIR filter on a screen, and operation means for changing the amplitude frequency characteristics and phase frequency characteristics displayed in advance on the screen of the display means. The amplitude frequency characteristic of the FIR filter is designated by the amplitude frequency characteristic changed by the operation means, and the phase frequency characteristic of the FIR filter is designated by the phase frequency characteristic changed by the operation means,
The filter coefficient setting means includes
Amplitude characteristic information, which is information representing the amplitude frequency characteristic, is obtained based on the amplitude frequency characteristic designated by the change characteristic designation means, and the phase frequency characteristic is obtained based on the phase frequency characteristic designated by the change characteristic designation means. The acoustic adjustment according to claim 11, configured to calculate a filter coefficient based on the amplitude characteristic information and the phase characteristic information after obtaining phase characteristic information that is information to be expressed, and to set the filter coefficient in the FIR filter. apparatus. The change characteristic designation means includes:
Display means for displaying an amplitude characteristic display area and a phase characteristic display area on a screen, and drawing an amplitude frequency characteristic curve in the amplitude characteristic display area of the display means screen and a phase frequency characteristic curve in the phase characteristic display area Operating means for drawing, specifying the amplitude frequency characteristic of the FIR filter by the amplitude frequency characteristic curve drawn by the operating means, and specifying the amplitude frequency characteristic of the FIR filter by the phase frequency characteristic curve drawn by the operating means. Configured to specify phase frequency characteristics,
The filter coefficient setting means includes
Amplitude characteristic information, which is information representing the amplitude frequency characteristic, is obtained based on the amplitude frequency characteristic designated by the change characteristic designation means, and the phase frequency characteristic is obtained based on the phase frequency characteristic designated by the change characteristic designation means. The acoustic adjustment according to claim 11, configured to calculate a filter coefficient based on the amplitude characteristic information and the phase characteristic information after obtaining phase characteristic information that is information to be expressed, and to set the filter coefficient in the FIR filter. apparatus. The change characteristic designation means includes:
First operating means for selecting one amplitude frequency characteristic from among a plurality of amplitude frequency characteristics, and second operating means for selecting one phase frequency characteristic from among a plurality of phase frequency characteristics And specifying the amplitude frequency characteristic of the FIR filter by the amplitude frequency characteristic selected by the first operating means, and the phase frequency characteristic of the FIR filter by the phase frequency characteristic selected by the second operating means. Configured to specify,

The filter coefficient setting means includes

A plurality of amplitude characteristic information, which is information representing each of the amplitude frequency characteristics of the plurality of FIR filters that can be designated by the change characteristic designation means, is stored in advance, and designated by the change characteristic designation means. A plurality of phase characteristic information, which is information representing each corresponding to each of a plurality of possible phase frequency characteristics of the FIR filter, and storing means storing in advance, the amplitude specified by the change characteristic specifying means After obtaining the amplitude characteristic information corresponding to the frequency characteristic and the phase characteristic information corresponding to the phase frequency characteristic designated by the change characteristic designation means from the storage means, based on the amplitude characteristic information and the phase characteristic information The acoustic adjustment device according to claim 11, configured to calculate a filter coefficient and set the filter coefficient in the FIR filter. The change characteristic designation means includes:
First operating means for selecting one amplitude frequency characteristic from among a plurality of amplitude frequency characteristics, and second operating means for selecting one phase frequency characteristic from among a plurality of phase frequency characteristics And specifying the amplitude frequency characteristic of the FIR filter by the amplitude frequency characteristic selected by the first operating means, and the phase frequency characteristic of the FIR filter by the phase frequency characteristic selected by the second operating means. Configured to specify,
The filter coefficient setting means includes
A plurality of filter coefficients corresponding to each of the amplitude frequency characteristics of the plurality of FIR filters and the phase frequency characteristics of the plurality of FIR filters that can be designated by the change characteristic designating means; The acoustic adjustment device according to claim 11, configured to acquire a filter coefficient corresponding to an amplitude frequency characteristic and a phase frequency characteristic designated by a change characteristic designation unit from the storage unit and set the filter coefficient in the FIR filter. The change characteristic designation means includes:
Input means for inputting amplitude setting information comprising a center frequency, a frequency bandwidth and a gain, and inputting phase setting information comprising a center frequency, a frequency bandwidth and an angle; The amplitude frequency characteristic of the FIR filter is designated by a plurality of the amplitude setting information, and the phase frequency characteristic of the FIR filter is designated by one or a plurality of the phase setting information inputted from the input means,
The filter coefficient setting means includes
Amplitude characteristic information, which is information representing the amplitude frequency characteristic, is obtained based on the amplitude frequency characteristic designated by the change characteristic designation means, and the phase frequency characteristic is obtained based on the phase frequency characteristic designated by the change characteristic designation means. The acoustic adjustment according to claim 11, configured to calculate a filter coefficient based on the amplitude characteristic information and the phase characteristic information after obtaining phase characteristic information that is information to be expressed, and to set the filter coefficient in the FIR filter. apparatus. The change characteristic designation means includes:
A first operating means for selecting one amplitude frequency characteristic from a plurality of amplitude frequency characteristics; and a second operating means for selecting one phase frequency characteristic from the plurality of phase frequency characteristics. Then, the amplitude frequency characteristic of the FIR filter is designated by the amplitude frequency characteristic selected by the first operation means, and the phase frequency characteristic of the FIR filter is designated by the phase frequency characteristic selected by the second operation means. Configured to

The filter coefficient setting means includes

Information corresponding to each of a plurality of phase frequency characteristics of the FIR filter that can be specified by the change characteristic specifying means, and an amplitude characteristic including one or a plurality of amplitude setting information including a center frequency, a frequency bandwidth, and a gain A plurality of specific information is stored in advance, and is information corresponding to each of a plurality of phase frequency characteristics of the plurality of FIR filters that can be specified by the change characteristic specifying means, and includes a center frequency, a frequency bandwidth, and an angle. A plurality of phase characteristic specifying information composed of one or a plurality of phase setting information is stored in advance, the amplitude characteristic specifying information corresponding to the amplitude frequency characteristic specified by the change characteristic specifying means and the change characteristic specification Phase characteristic specifying information corresponding to the phase frequency characteristic designated by the means is acquired from the storage means, and then the amplitude characteristic Calculating a filter coefficient based on the constant information and the phase characteristic identifying information, audio control system of claim 11, which is configured to set the FIR filter.
A finite impulse response filter (hereinafter referred to as “FIR filter”) that outputs the input audio signal after performing filter processing according to a set filter coefficient;
Change characteristic designating means for designating a total phase frequency characteristic of the FIR filter and an acoustic output device connected to a subsequent stage of the FIR filter to be realized after changing the phase frequency characteristic of the FIR filter;
And a filter coefficient setting unit configured to set, in the FIR filter, a filter coefficient corresponding to the phase frequency characteristic of the FIR filter corresponding to the total phase frequency characteristic specified by the change characteristic specifying unit. The change characteristic designation means includes:
Display means for displaying on the screen a phase adjustment operator for setting a phase corresponding to the display position for each of a plurality of predetermined frequencies, and for the phase adjustment displayed on the screen of the display means Operating means for changing the display position of the operation element, and configured to specify the total phase frequency characteristic by the display position of the phase adjustment operation element changed by the operation means,
The filter coefficient setting means includes
Information indicating the phase frequency characteristics of the acoustic output device has storage means in which information indicating the phase frequency characteristics of the acoustic output device is stored in advance, and represents the phase frequency characteristics based on the total phase frequency characteristics specified by the change characteristic specifying means. After obtaining the total phase characteristic information, the filter phase which is information indicating the phase frequency characteristic of the FIR filter from the total phase characteristic information and the information indicating the phase frequency characteristic of the acoustic output device stored in the storage means 21. The acoustic adjustment device according to claim 20, configured to obtain characteristic information, calculate a filter coefficient based on the filter phase characteristic information, and set the coefficient in the FIR filter. The change characteristic designation means includes:
It has a phase adjustment operator for setting a phase corresponding to the operation position for each of a plurality of predetermined frequencies, and specifies the total phase frequency characteristic by the operation position of the phase adjustment operator Configured as
The filter coefficient setting means includes
Information indicating the phase frequency characteristics of the acoustic output device has storage means in which information indicating the phase frequency characteristics of the acoustic output device is stored in advance, and represents the phase frequency characteristics based on the total phase frequency characteristics specified by the change characteristic specifying means. After obtaining the total phase characteristic information, the filter phase which is information indicating the phase frequency characteristic of the FIR filter from the total phase characteristic information and the information indicating the phase frequency characteristic of the acoustic output device stored in the storage means 21. The acoustic adjustment device according to claim 20, configured to obtain characteristic information, calculate a filter coefficient based on the filter phase characteristic information, and set the coefficient in the FIR filter. The change characteristic designation means includes:
A display means for displaying the total phase frequency characteristic on the screen; and an operation means for changing the phase frequency characteristic displayed in advance on the screen of the display means, and the phase frequency changed by the operation means. Configured to specify the overall phase frequency characteristics by characteristics,
The filter coefficient setting means includes
Information indicating the phase frequency characteristics of the acoustic output device has storage means in which information indicating the phase frequency characteristics of the acoustic output device is stored in advance, and represents the phase frequency characteristics based on the total phase frequency characteristics specified by the change characteristic specifying means. After obtaining the total phase characteristic information, the filter phase which is information indicating the phase frequency characteristic of the FIR filter from the total phase characteristic information and the information indicating the phase frequency characteristic of the acoustic output device stored in the storage means 21. The acoustic adjustment device according to claim 20, configured to obtain characteristic information, calculate a filter coefficient based on the filter phase characteristic information, and set the coefficient in the FIR filter.
The acoustic adjustment device according to claim 4 or 23, wherein the display of the phase frequency characteristic by the display means is a graph.
The change characteristic designation means includes:
A display means for displaying a phase characteristic display area on a screen; and an operation means for drawing a phase frequency characteristic curve in the phase characteristic display area of the screen of the display means. The phase frequency drawn by the operation means Configured to specify the overall phase frequency characteristic by a characteristic curve;
The filter coefficient setting means includes
Information indicating the phase frequency characteristics of the acoustic output device has storage means in which information indicating the phase frequency characteristics of the acoustic output device is stored in advance, and represents the phase frequency characteristics based on the total phase frequency characteristics specified by the change characteristic specifying means. After obtaining the total phase characteristic information, the filter phase which is information indicating the phase frequency characteristic of the FIR filter from the total phase characteristic information and the information indicating the phase frequency characteristic of the acoustic output device stored in the storage means 21. The acoustic adjustment device according to claim 20, configured to obtain characteristic information, calculate a filter coefficient based on the filter phase characteristic information, and set the coefficient in the FIR filter. The change characteristic designation means includes:
It has an operation means for selecting one phase frequency characteristic from a plurality of phase frequency characteristics, and is configured to designate the total phase frequency characteristic by the phase frequency characteristic selected by the operation means,
The filter coefficient setting means includes
Storage means in which a plurality of pieces of total phase characteristic information that is information indicating the plurality of total phase frequency characteristics that can be designated by the change characteristic designation means and information that represents the phase frequency characteristics of the sound output device are stored in advance. And obtaining information indicating the phase frequency characteristics of the acoustic output device and total phase characteristic information corresponding to the total phase frequency characteristics specified by the change characteristic specifying means from the storage means, Obtaining filter phase characteristic information that is information representing the phase frequency characteristic of the FIR filter from the phase characteristic information and information representing the phase frequency characteristic of the acoustic output device, calculating a filter coefficient based on the filter phase characteristic information, The sound adjustment device according to claim 20, wherein the sound adjustment device is configured to be set in the FIR filter.   27. The acoustic adjustment device according to any one of claims 21 to 26, wherein the storage unit of the filter coefficient setting unit is configured to be able to rewrite information representing a phase frequency characteristic of the stored acoustic output device. The change characteristic designation means includes:
It has an operation means for selecting one phase frequency characteristic from a plurality of phase frequency characteristics, and is configured to designate the total phase frequency characteristic by the phase frequency characteristic selected by the operation means,
The filter coefficient setting means includes
Storage means for storing a plurality of pieces of filter phase characteristic information, which is information representing the phase frequency characteristics of the FIR filter corresponding to each of the plurality of total phase frequency characteristics that can be designated by the change characteristic designation means. And obtaining filter phase characteristic information corresponding to the total phase frequency characteristic designated by the change characteristic designation means from the storage means, then calculating a filter coefficient based on the filter phase characteristic information, and the FIR filter The sound adjustment device according to claim 20, wherein the sound adjustment device is configured to be set to the following.   29. The acoustic adjustment device according to claim 28, wherein the storage unit of the filter coefficient setting unit is configured to rewrite the stored filter phase characteristic information. The change characteristic designation means includes:
It has an operation means for selecting one phase frequency characteristic from a plurality of phase frequency characteristics, and is configured to designate the total phase frequency characteristic by the phase frequency characteristic selected by the operation means,
The filter coefficient setting means includes
A plurality of filter coefficients of the FIR filter corresponding to each of the plurality of total phase frequency characteristics that can be specified by the change characteristic specifying means; 21. The acoustic adjustment device according to claim 20, wherein a filter coefficient corresponding to the total phase frequency characteristic is acquired from the storage unit and set in the FIR filter. The change characteristic designation means includes:
An input means for inputting phase setting information comprising a center frequency, a frequency bandwidth and an angle, and one or a plurality of the phase setting information input from the input means are configured to designate the total phase frequency characteristic. ,
The filter coefficient setting means includes

Information indicating the phase frequency characteristics of the acoustic output device has storage means in which information indicating the phase frequency characteristics of the acoustic output device is stored in advance, and represents the phase frequency characteristics based on the total phase frequency characteristics specified by the change characteristic specifying means. After obtaining the total phase characteristic information, the filter phase which is information indicating the phase frequency characteristic of the FIR filter from the total phase characteristic information and the information indicating the phase frequency characteristic of the acoustic output device stored in the storage means 21. The acoustic adjustment device according to claim 20, configured to obtain characteristic information, calculate a filter coefficient based on the filter phase characteristic information, and set the coefficient in the FIR filter.
  32. The acoustic adjustment device according to claim 9 or 31, wherein the input unit is configured to input the phase setting information by inputting respective numerical values of a center frequency, a frequency bandwidth, and an angle.   32. The acoustic adjustment device according to claim 9, further comprising a display unit that displays a phase frequency characteristic curve corresponding to the phase setting information input from the input unit on a screen. The input means has an operation element corresponding to each of a center frequency, a frequency bandwidth, and an angle, and is configured to specify the phase setting information by operation of the operation element,
32. The acoustic adjustment device according to claim 9 or 31, further comprising a display unit configured to display a phase frequency characteristic curve corresponding to the phase setting information specified by the operation of the operation element on a screen. The input means includes
A display means for displaying a predetermined phase frequency characteristic curve, an operation element arranged on the predetermined phase frequency characteristic curve and corresponding to a center frequency, a frequency bandwidth and an angle; and a display position of the operation element. Operating means for changing, and configured to specify the phase setting information according to a display position of the operation element, and the display means is configured to change the display position of the operation element in accordance with the predetermined position. The acoustic adjustment device according to claim 9 or 31, wherein the acoustic adjustment device is configured to change a shape of a phase frequency characteristic curve.   The acoustic adjustment device according to claim 9 or 31, wherein the input unit is configured to input the phase setting information created in advance as data. The change characteristic designation means includes:
It has an operation means for selecting one phase frequency characteristic from a plurality of phase frequency characteristics, and is configured to designate the total phase frequency characteristic by the phase frequency characteristic selected by the operation means,

The filter coefficient setting means includes

Information corresponding to each of the plurality of total phase frequency characteristics that can be designated by the change characteristic designation means, and phase characteristic identification comprising one or more phase setting information comprising a center frequency, a frequency bandwidth, and an angle A plurality of information is stored in advance,
Information indicating the phase frequency characteristics of the acoustic output device is stored in advance, and information indicating the phase frequency characteristics of the acoustic output device and the total phase frequency specified by the change characteristic specifying means A filter which is information representing the phase frequency characteristics of the FIR filter from the phase characteristic identification information and the information representing the phase frequency characteristics of the acoustic output device after obtaining the phase characteristic identification information corresponding to the characteristics from the storage means 21. The acoustic adjustment device according to claim 20, configured to obtain phase characteristic information, calculate a filter coefficient based on the filter phase characteristic information, and set the filter coefficient in the FIR filter.
The change characteristic designation means is further configured to designate a total amplitude frequency characteristic of the sound output device and the FIR filter to be realized after changing the amplitude frequency characteristic of the FIR filter,
The filter coefficient setting means sets a filter coefficient corresponding to the amplitude frequency characteristic and phase frequency characteristic of the FIR filter corresponding to the total amplitude frequency characteristic and phase frequency characteristic specified by the change characteristic specifying means to the FIR. The acoustic adjustment device according to claim 20, configured to be set in a filter. The change characteristic designation means includes:
A gain adjusting operator for setting a gain corresponding to a display position for each of a plurality of predetermined frequencies; a phase adjusting operator for setting a phase corresponding to the display position for each frequency; Display means for displaying on the screen, and operation means for changing the display position of the gain adjustment operator and the display position of the phase adjustment operator displayed on the screen of the display means. The total amplitude frequency characteristic is designated by the display position of the gain adjustment operator changed by the operation means, and the total phase frequency is specified by the display position of the phase adjustment operator changed by the operation means. Configured to specify characteristics,
The filter coefficient setting means includes
It has storage means in which information representing the amplitude frequency characteristic of the acoustic output device and information representing the phase frequency characteristic are stored in advance, and the amplitude based on the total amplitude frequency characteristic designated by the change characteristic designation means After obtaining the total amplitude characteristic information which is information representing the frequency characteristic, the amplitude frequency characteristic of the FIR filter is obtained from the total amplitude characteristic information and the information representing the amplitude frequency characteristic of the sound output device stored in the storage means. Filter amplitude characteristic information that is information indicating the total phase characteristic information, which is information indicating the phase frequency characteristic based on the total phase frequency characteristic specified by the change characteristic specifying means, The level of the FIR filter is calculated from the phase characteristic information and the information indicating the phase frequency characteristic of the acoustic output device stored in the storage means. The filter phase characteristic information, which is information representing the frequency characteristic, is obtained, a filter coefficient is calculated based on the filter amplitude characteristic information and the filter phase characteristic information, and set in the FIR filter. The acoustic adjustment device described. The change characteristic designation means includes:
A gain adjusting operator for setting a gain corresponding to an operation position for each of a plurality of predetermined frequencies; a phase adjusting operator for setting a phase corresponding to the operation position for each frequency; And specifying the total amplitude frequency characteristic by the operation position of the gain adjustment operator and specifying the total phase frequency characteristic by the operation position of the phase adjustment operator,
The filter coefficient setting means includes
It has storage means in which information representing the amplitude frequency characteristic of the acoustic output device and information representing the phase frequency characteristic are stored in advance, and the amplitude based on the total amplitude frequency characteristic designated by the change characteristic designation means After obtaining the total amplitude characteristic information which is information representing the frequency characteristic, the amplitude frequency characteristic of the FIR filter is obtained from the total amplitude characteristic information and the information representing the amplitude frequency characteristic of the sound output device stored in the storage means. Filter amplitude characteristic information that is information indicating the total phase characteristic information, which is information indicating the phase frequency characteristic based on the total phase frequency characteristic specified by the change characteristic specifying means, The level of the FIR filter is calculated from the phase characteristic information and the information indicating the phase frequency characteristic of the acoustic output device stored in the storage means. The filter phase characteristic information, which is information representing the frequency characteristic, is obtained, a filter coefficient is calculated based on the filter amplitude characteristic information and the filter phase characteristic information, and set in the FIR filter. The acoustic adjustment device described. The change characteristic designation means includes:
Display means for displaying the total amplitude frequency characteristic and the total phase frequency characteristic on a screen; and an operation means for changing the amplitude frequency characteristic and the phase frequency characteristic preliminarily displayed on the screen of the display means; And specifying the total amplitude frequency characteristic by the amplitude frequency characteristic changed by the operation means and specifying the total phase frequency characteristic by the phase frequency characteristic changed by the operation means,
The filter coefficient setting means includes
It has storage means in which information representing the amplitude frequency characteristic of the acoustic output device and information representing the phase frequency characteristic are stored in advance, and the amplitude based on the total amplitude frequency characteristic designated by the change characteristic designation means After obtaining the total amplitude characteristic information which is information representing the frequency characteristic, the amplitude frequency characteristic of the FIR filter is obtained from the total amplitude characteristic information and the information representing the amplitude frequency characteristic of the sound output device stored in the storage means. Filter amplitude characteristic information that is information indicating the total phase characteristic information, which is information indicating the phase frequency characteristic based on the total phase frequency characteristic specified by the change characteristic specifying means, The level of the FIR filter is calculated from the phase characteristic information and the information indicating the phase frequency characteristic of the acoustic output device stored in the storage means. The filter phase characteristic information, which is information representing the frequency characteristic, is obtained, a filter coefficient is calculated based on the filter amplitude characteristic information and the filter phase characteristic information, and set in the FIR filter. The acoustic adjustment device described.
The acoustic adjustment device according to claim 14 or 41, wherein the display of the amplitude frequency characteristic and the phase frequency characteristic by the display means is based on a graph.
The change characteristic designation means includes:
Display means for displaying an amplitude characteristic display area and a phase characteristic display area on a screen, and an amplitude frequency characteristic curve is drawn in the amplitude characteristic display area of the screen of the display means, and a phase frequency characteristic curve is displayed in the phase characteristic display area Operating means for drawing, specifying the total amplitude frequency characteristic by the amplitude frequency characteristic curve drawn by the operating means, and specifying the total phase frequency by the phase frequency characteristic curve drawn by the operating means Configured to specify characteristics,
The filter coefficient setting means includes
It has storage means in which information representing the amplitude frequency characteristic of the acoustic output device and information representing the phase frequency characteristic are stored in advance, and the amplitude based on the total amplitude frequency characteristic designated by the change characteristic designation means After obtaining the total amplitude characteristic information which is information representing the frequency characteristic, the amplitude frequency characteristic of the FIR filter is obtained from the total amplitude characteristic information and the information representing the amplitude frequency characteristic of the sound output device stored in the storage means. Filter amplitude characteristic information that is information indicating the total phase characteristic information, which is information indicating the phase frequency characteristic based on the total phase frequency characteristic specified by the change characteristic specifying means, The level of the FIR filter is calculated from the phase characteristic information and the information indicating the phase frequency characteristic of the acoustic output device stored in the storage means. The filter phase characteristic information, which is information representing the frequency characteristic, is obtained, a filter coefficient is calculated based on the filter amplitude characteristic information and the filter phase characteristic information, and set in the FIR filter. The acoustic adjustment device described. The change characteristic designation means includes:
First operating means for selecting one amplitude frequency characteristic from among a plurality of amplitude frequency characteristics, and second operating means for selecting one phase frequency characteristic from among a plurality of phase frequency characteristics And specifying the total amplitude frequency characteristic by the amplitude frequency characteristic selected by the first operation means and specifying the total phase frequency characteristic by the phase frequency characteristic selected by the second operation means. Configured as
The filter coefficient setting means includes
A plurality of total amplitude characteristic information that is information indicating the plurality of total amplitude frequency characteristics that can be specified by the change characteristic specifying means, a plurality of total phase characteristic information that is information indicating the total phase frequency characteristics, and the sound Information indicating the amplitude frequency characteristics of the output device and information indicating the phase frequency characteristics are stored in advance, and are specified by the information indicating the amplitude frequency characteristics of the sound output device and the change characteristic specifying means. Total amplitude characteristic information corresponding to the total amplitude frequency characteristic is acquired from the storage means, and the amplitude frequency characteristic of the FIR filter is expressed from the total amplitude characteristic information and information indicating the amplitude frequency characteristic of the sound output device. Filter amplitude characteristic information, which is information, and information indicating the phase frequency characteristic of the acoustic output device and the change characteristic designation means. The total phase characteristic information corresponding to the specified total phase frequency characteristic is acquired from the storage means, and the phase frequency of the FIR filter is obtained from the total phase characteristic information and the information indicating the phase frequency characteristic of the acoustic output device. The filter phase characteristic information, which is information representing the characteristic, is obtained, and then a filter coefficient is calculated based on the filter amplitude characteristic information and the filter phase characteristic information, and set to the FIR filter. The acoustic adjustment device described in 1.   45. The storage unit of the filter coefficient setting unit is configured to be able to rewrite stored information representing an amplitude frequency characteristic and information representing a phase frequency characteristic of the acoustic output device. The acoustic adjustment device described. The change characteristic designation means includes:
First operating means for selecting one amplitude frequency characteristic from among a plurality of amplitude frequency characteristics, and second operating means for selecting one phase frequency characteristic from among a plurality of phase frequency characteristics And specifying the total amplitude frequency characteristic by the amplitude frequency characteristic selected by the first operation means and specifying the total phase frequency characteristic by the phase frequency characteristic selected by the second operation means. Configured as
The filter coefficient setting means includes
A plurality of filter amplitude characteristic information, which is information representing the amplitude frequency characteristics of the FIR filter corresponding to each of the plurality of overall amplitude frequency characteristics that can be specified by the change characteristic specifying means, is stored in advance, and the change A plurality of filter phase characteristic information that is information indicating the phase frequency characteristics of the FIR filter corresponding to each of the plurality of total phase frequency characteristics that can be designated by the characteristic designation means; The filter amplitude characteristic information corresponding to the total amplitude frequency characteristic specified by the change characteristic specifying means and the filter phase characteristic information corresponding to the total phase frequency characteristic specified by the change characteristic specifying means are stored. After obtaining the filter amplitude characteristic information and the filter phase characteristic information. Calculating the coefficients, audio control system of claim 38 that is configured to set the FIR filter.   The acoustic adjustment device according to claim 46, wherein the storage means of the filter coefficient setting means is configured to rewrite the stored filter amplitude characteristic information and the filter phase characteristic information. The change characteristic designation means includes:
First operating means for selecting one amplitude frequency characteristic from among a plurality of amplitude frequency characteristics, and second operating means for selecting one phase frequency characteristic from among a plurality of phase frequency characteristics And specifying the total amplitude frequency characteristic by the amplitude frequency characteristic selected by the first operation means and specifying the total phase frequency characteristic by the phase frequency characteristic selected by the second operation means. Configured as
The filter coefficient setting means includes

A storage unit that stores in advance a plurality of filter coefficients of the FIR filter corresponding to each of the plurality of total amplitude frequency characteristics and the plurality of total phase frequency characteristics that can be specified by the change characteristic specifying unit; The filter coefficient corresponding to the total amplitude frequency characteristic and the total phase frequency characteristic specified by the change characteristic specifying means is acquired from the storage means and set in the FIR filter. Item 40. The acoustic adjustment device according to Item 38.
  The acoustic adjustment device according to claim 8, 17, 30 or 48, wherein the storage means of the filter coefficient setting means is configured to rewrite the stored filter coefficient. The change characteristic designation means includes:
Input means for inputting amplitude setting information including a center frequency, a frequency bandwidth, and a gain, and inputting phase setting information including a center frequency, a frequency bandwidth, and an angle, and one or more input from the input means The total amplitude frequency characteristic is designated by the amplitude setting information, and the total phase frequency characteristic is designated by one or a plurality of the phase setting information input from the input means,
The filter coefficient setting means includes

The total amplitude frequency specified by the change characteristic specifying means has storage means for storing information indicating the amplitude frequency characteristics of the sound output apparatus and information indicating the phase frequency characteristics of the sound output apparatus in advance. After obtaining the overall amplitude characteristic information which is information representing the amplitude frequency characteristic based on the characteristic, the total amplitude characteristic information and the information representing the amplitude frequency characteristic of the acoustic output device stored in the storage means Comprehensive phase characteristic information which is information representing the phase frequency characteristic based on the total phase frequency characteristic designated by the change characteristic designation means while obtaining filter amplitude characteristic information which is information representing the amplitude frequency characteristic of the FIR filter Information indicating the overall phase characteristic information and the phase frequency characteristic of the acoustic output device stored in the storage means Filter phase characteristic information, which is information representing the phase frequency characteristic of the FIR filter, is obtained, filter coefficients are calculated based on the filter amplitude characteristic information and the filter phase characteristic information, and are set in the FIR filter. The acoustic adjustment device according to claim 38.
  The input means inputs the amplitude setting information by inputting the numerical values of the center frequency, the frequency bandwidth, and the gain, and inputs the numerical values of the center frequency, the frequency bandwidth, and the angle. 51. The acoustic adjustment device according to claim 18 or 50, configured to input the phase setting information.   An amplitude frequency characteristic curve corresponding to the amplitude setting information input from the input means is displayed on the screen, and a phase frequency characteristic curve corresponding to the phase setting information input from the input means is displayed on the screen. 51. The acoustic adjustment device according to claim 18 or 50, further comprising display means. The input means includes a first operator corresponding to each of a center frequency, a frequency bandwidth, and a gain, and a second operator corresponding to each of the center frequency, the frequency bandwidth, and the angle, The amplitude setting information is specified by an operation of the first operator and the phase setting information is specified by an operation of the second operator.
An amplitude frequency characteristic curve corresponding to the amplitude setting information specified by the operation of the first operator is displayed on the screen, and according to the phase setting information specified by the operation of the second operator 51. The acoustic adjustment device according to claim 18, further comprising display means for displaying a phase frequency characteristic curve. The input means includes
A predetermined amplitude frequency characteristic curve and a predetermined phase frequency characteristic curve; a first operator disposed on the predetermined amplitude frequency characteristic curve and corresponding to a center frequency, a frequency bandwidth, and a gain; Display means for displaying a second operation element arranged on the phase frequency characteristic curve and corresponding to each of a center frequency, a frequency bandwidth and an angle, and display positions of the first operation element and the second operation element The amplitude setting information is specified by the display position of the first operation element, and the phase setting information is specified by the display position of the second operation element. In addition, the display means changes the shape of the predetermined amplitude frequency characteristic curve in accordance with the change in the display position of the first operation element, and changes the display position of the second operation element in advance. Predetermined configured to change the shape of the phase-frequency characteristic curve, the acoustic controller according to claim 18 or 50.   51. The acoustic adjustment device according to claim 18, wherein the input unit is configured to input the amplitude setting information and the phase setting information created in advance as data. The change characteristic designation means includes:
A first operating means for selecting one amplitude frequency characteristic from a plurality of amplitude frequency characteristics; and a second operating means for selecting one phase frequency characteristic from the plurality of phase frequency characteristics. The total amplitude frequency characteristic is designated by the amplitude frequency characteristic selected by the first operation means, and the total phase frequency characteristic is designated by the phase frequency characteristic selected by the second operation means. Composed of

The filter coefficient setting means includes

Information corresponding to each of a plurality of the total amplitude frequency characteristics that can be specified by the change characteristic specifying means, and an amplitude characteristic specification including one or a plurality of amplitude setting information including a center frequency, a frequency bandwidth, and a gain A plurality of pieces of information are stored in advance, and are information corresponding to each of a plurality of the total phase frequency characteristics that can be specified by the change characteristic specifying means, and are composed of a center frequency, a frequency bandwidth, and an angle. A plurality of pieces of phase characteristic specifying information composed of a plurality of phase setting information are stored in advance, and information indicating the amplitude frequency characteristics of the sound output device and information indicating the phase frequency characteristics are stored in advance. ,
Information representing the amplitude frequency characteristics of the acoustic output device, information representing the phase frequency characteristics of the acoustic output device, amplitude characteristic specifying information corresponding to the total amplitude frequency characteristics designated by the change characteristic designation means, After obtaining from the storage means phase characteristic specifying information corresponding to the total phase frequency characteristic specified by the change characteristic specifying means, the amplitude characteristic specifying information and information representing the amplitude frequency characteristic of the sound output device; Filter amplitude characteristic information which is information representing the amplitude frequency characteristic of the FIR filter is obtained from the information, and information representing the phase frequency characteristic of the FIR filter is obtained from the phase characteristic specifying information and the information representing the phase frequency characteristic of the acoustic output device. Filter phase characteristic information, and based on the filter amplitude characteristic information and the filter phase characteristic information. Calculating the filter coefficients, audio control system of claim 38 that is configured to set the FIR filter.
A finite impulse response filter (hereinafter referred to as “FIR filter”) that outputs the input audio signal after performing filter processing according to a set filter coefficient;
Phase change frequency designating means for designating a frequency to advance or retard the phase in order to change the phase frequency characteristics of the FIR filter;

After obtaining phase characteristic information which is information representing the phase frequency characteristic based on the phase frequency characteristic of the FIR filter obtained by advancing or delaying the phase of the frequency designated by the phase change frequency designation means, the phase An acoustic adjustment apparatus comprising: filter coefficient setting means for calculating a filter coefficient based on characteristic information and setting the filter coefficient in the FIR filter.
In order to change the amplitude frequency characteristic of the FIR filter, provided is an amplitude change frequency specifying means for specifying a frequency for increasing or decreasing the gain,
The filter coefficient setting means obtains the phase characteristic information, and based on the amplitude frequency characteristic of the FIR filter in which the gain of the frequency designated by the amplitude change frequency designation means is increased or decreased by a predetermined value. 58. The sound according to claim 57, wherein after obtaining amplitude characteristic information that is information representing the frequency, a filter coefficient is calculated based on the phase characteristic information and the amplitude characteristic information, and is set in the FIR filter. Adjustment device. An acoustic adjustment device including a filter device,
The filter device inputs an audio signal, filters the audio signal, outputs the filtered audio signal,
The said filter apparatus is an acoustic adjustment apparatus which can set arbitrary phase frequency characteristics as the phase frequency characteristic.   60. The acoustic adjustment device according to claim 59, wherein the filter device can set an arbitrary phase frequency characteristic in an arbitrary frequency range.   61. The acoustic adjustment device according to claim 59, wherein the filter device can set its phase frequency characteristic independently of the amplitude frequency characteristic.   The acoustic adjustment device according to any one of claims 59 to 61, wherein the filter device can set the amplitude frequency characteristic independently of the phase frequency characteristic.   The acoustic adjustment device according to any one of claims 59 to 62, wherein the filter device can change only the phase frequency characteristic without changing the amplitude frequency characteristic. A sound output device is connected to the rear stage,
64. The phase frequency characteristic of the filter device is set such that a total phase frequency characteristic of the filter device and the acoustic output device is the same as a desired phase frequency characteristic. The acoustic adjustment device described. A sound output device having a speaker is connected to the rear stage,
64. The phase frequency characteristic of the filter device is set such that a total phase frequency characteristic of the filter device and the speaker is the same as a phase frequency property of another specific speaker. The sound adjusting device according to claim 1.   66. The acoustic adjustment device according to any one of claims 59 to 65, wherein the filtering is performed by digital signal processing.   An acoustic adjustment device having a digital signal processing means, wherein the digital signal processing means is capable of adjusting a phase frequency characteristic, and changes the phase of an input audio signal at an arbitrary frequency by a predetermined angle.   An audio signal having a filter device that can input an audio signal, filter and output the audio signal, and can set an arbitrary phase frequency characteristic independent of the amplitude frequency characteristic as its own phase frequency characteristic apparatus. An external input terminal for inputting audio signals from the outside,
An amplification circuit that inputs the audio signal input from the external input terminal through the filter device and amplifies and outputs power; and
69. The acoustic device according to claim 68, further comprising a speaker that converts an audio signal output from the amplifier circuit into an acoustic signal and outputs the acoustic signal to the outside. A microphone that converts an acoustic signal input from the outside into an audio signal;
An amplification circuit that inputs the audio signal input from the microphone through the filter device and amplifies and outputs power; and
69. The acoustic device according to claim 68, further comprising: a speaker that converts an audio signal output from the amplifier circuit into an acoustic signal and outputs the acoustic signal. An external input terminal for inputting audio signals from the outside,
An amplification circuit that inputs the audio signal input from the external input terminal through the filter device and amplifies and outputs power; and
69. The acoustic device according to claim 68, further comprising an external output terminal that outputs an audio signal output from the amplifier circuit to the outside. A receiving circuit that converts a radio signal input from an antenna into an electrical signal;
A demodulation circuit that demodulates and outputs the electrical signal to an audio signal;
69. The acoustic device according to claim 68, further comprising: an external output terminal that outputs an audio signal output from the demodulation circuit to the outside through the filter device. A plurality of external input terminals for inputting audio signals from the outside,
A synthesis circuit that inputs the audio signals input from the plurality of external input terminals, synthesizes and outputs the input audio signals;
69. The acoustic device according to claim 68, further comprising an external output terminal that outputs an audio signal output from the synthesis circuit to the outside via the filter device. A plurality of the filter devices are provided,
A plurality of external input terminals that are connected to each of the filter devices and input audio signals from the outside,
A synthesis circuit that inputs the audio signal from each of the plurality of external input terminals via the filter device, and synthesizes and outputs the input audio signal;
69. The acoustic device according to claim 68, further comprising an external output terminal that outputs an audio signal output from the synthesis circuit to the outside.   The acoustic device according to any one of claims 68 to 74, wherein the filter device can set an arbitrary phase frequency characteristic in an arbitrary frequency range. The acoustic device according to any one of claims 68 to 75, wherein the filter device can set the amplitude frequency characteristic independently of the phase frequency characteristic.
  The acoustic device according to any one of claims 68 to 74, wherein the phase frequency characteristic of the filter device is set by an external device. The acoustic device according to claim 76, wherein the phase frequency characteristic and the amplitude frequency characteristic of the filter device are set by an external device.
  The acoustic device according to any one of claims 68 to 76, wherein the filter device has a predetermined phase frequency characteristic.   The phase frequency characteristic of the filter device is set so that a total phase frequency characteristic of the amplifier circuit, the speaker, and the filter device is the same as a desired phase frequency property. Acoustic device.   The phase frequency characteristic of the filter device is set so that a total phase frequency characteristic of the speaker and the filter device is the same as a phase frequency property of another specific speaker. Acoustic device.   When a sound output device is connected at the subsequent stage, the phase frequency characteristic of the filter device is set so that the total phase frequency characteristic of the sound output device and the filter device is the same as the desired phase frequency characteristic. The acoustic device according to any one of claims 71 to 73.   When a sound output device having a speaker is connected in the subsequent stage, the total phase frequency characteristic of the speaker and the filter device is the same as the phase frequency characteristic of other specific speakers. The acoustic device according to any one of claims 71 to 73, wherein a phase frequency characteristic is set.   The acoustic device according to any one of claims 68 to 76, wherein the filter device can change only the phase frequency characteristic without changing the amplitude frequency characteristic.   The acoustic device according to any one of claims 68 to 76, wherein the filter device can change a phase frequency characteristic thereof.   The acoustic device according to claim 85, wherein the filter device can change an amplitude frequency characteristic thereof.   The filter device is provided with phase characteristic designation operation means for performing an operation for designating a desired phase frequency characteristic to be realized after the change in order to change the phase frequency characteristic. The acoustic device according to the above.   The acoustic filter according to claim 87, wherein the filter device is provided with amplitude characteristic designation operation means for performing an operation for designating a desired amplitude frequency characteristic to be realized after the change in order to change the amplitude frequency characteristic. apparatus.   In order to change the phase frequency characteristic of the filter device, to specify the total phase frequency characteristic of the acoustic output device connected to the subsequent stage of the filter device and the filter device, which should be realized after the change 69. Comprehensive phase characteristic specifying operation means for performing an operation is provided, and a phase frequency characteristic of itself is set according to the total phase frequency characteristic specified by the total phase characteristic specifying operation means. The acoustic device according to any one of -74.   In order to change the amplitude frequency characteristic of the filter device, to specify the total amplitude frequency characteristic of the acoustic output device connected to the subsequent stage of the filter device and the filter device, which should be realized after the change 90. A total amplitude characteristic specifying operation means for performing an operation is provided, and configured so that its own amplitude frequency characteristic corresponding to the total amplitude frequency characteristic specified by the total amplitude characteristic specifying operation means is set. The acoustic device described in 1. The filter device includes:
A finite impulse response filter (hereinafter referred to as “FIR filter”) that outputs the input audio signal after performing a filtering process according to a set filter coefficient;
Change characteristic designating means for designating a phase frequency characteristic of the FIR filter to be realized after the change in order to change the phase frequency characteristic of the FIR filter which is a phase frequency characteristic of the filter device;
75. The acoustic device according to claim 68, further comprising: a filter coefficient setting unit that sets a filter coefficient corresponding to a phase frequency characteristic specified by the change characteristic specifying unit in the FIR filter. The change characteristic specifying means is further configured to specify an amplitude frequency characteristic of the FIR filter to be realized after the change in order to change the amplitude frequency characteristic of the FIR filter,
92. The acoustic device according to claim 91, wherein the filter coefficient setting unit is configured to set a filter coefficient corresponding to an amplitude frequency characteristic and a phase frequency characteristic specified by the change characteristic specifying unit in the FIR filter. The filter device includes:
A finite impulse response filter (hereinafter referred to as “FIR filter”) that outputs the input audio signal after performing filter processing according to a set filter coefficient;
Designate the overall phase frequency characteristics of the FIR filter and the acoustic output device connected to the subsequent stage of the filter device to be realized after changing the phase frequency property of the FIR filter, which is the phase frequency property of the filter device Change characteristic designation means to perform,
69. A filter coefficient setting unit configured to set a filter coefficient corresponding to the phase frequency characteristic of the FIR filter corresponding to the total phase frequency characteristic specified by the change characteristic specifying unit in the FIR filter. 74. The acoustic device according to any one of 74. The change characteristic designation means is further configured to designate a total amplitude frequency characteristic of the sound output device and the FIR filter to be realized after changing the amplitude frequency characteristic of the FIR filter,
The filter coefficient setting means sets a filter coefficient corresponding to the amplitude frequency characteristic and phase frequency characteristic of the FIR filter corresponding to the total amplitude frequency characteristic and phase frequency characteristic specified by the change characteristic specifying means to the FIR. 94. The acoustic device of claim 93 configured to be set in a filter. The filter device includes:
A finite impulse response filter (hereinafter referred to as “FIR filter”) that outputs the input audio signal after performing filter processing according to a set filter coefficient;
Phase change frequency specifying means for specifying a frequency to advance or delay the phase in order to change the phase frequency characteristic of the FIR filter, which is the phase frequency characteristic of the filter device;

After obtaining phase characteristic information which is information representing the phase frequency characteristic based on the phase frequency characteristic of the FIR filter obtained by advancing or delaying the phase of the frequency designated by the phase change frequency designation means, the phase The acoustic device according to any one of claims 68 to 74, further comprising: a filter coefficient setting unit that calculates a filter coefficient based on characteristic information and sets the filter coefficient in the FIR filter.
The filter device includes:
Further, in order to change the amplitude frequency characteristic of the FIR filter, amplitude change frequency specifying means for specifying a frequency for increasing or decreasing the gain is provided,
The filter coefficient setting means obtains the phase characteristic information, and based on the amplitude frequency characteristic of the FIR filter in which the gain of the frequency designated by the amplitude change frequency designation means is increased or decreased by a predetermined value. 96. The acoustic wave according to claim 95, wherein after obtaining amplitude characteristic information which is information representing the frequency, a filter coefficient is calculated based on the phase characteristic information and the amplitude characteristic information and set in the FIR filter. apparatus. Computer
Data extraction means for extracting audio waveform data from an audio file of the first file format;
A filter process is performed on the extracted voice waveform data, and the phase frequency characteristic of the voice signal based on the voice waveform data is changed independently of the amplitude frequency characteristic by performing the filter process. Filter means for setting a predetermined phase frequency characteristic;
An audio editing program for functioning as file creation means for creating an audio file of the second file format based on the audio waveform data subjected to the filtering process.   The voice editing program according to claim 97, wherein the data extraction means extracts voice waveform data from the voice file of the recording medium on which the voice file of the first file format is recorded.   99. The voice editing program according to claim 97 or 98, wherein the file creation means records the created voice file of the second file format on a recording medium.   The audio editing program according to any one of claims 97 to 99, wherein the first file format and the second file format are the same file format. The computer,
The audio editing program according to any one of claims 97 to 100, which further functions as a filter characteristic changing unit that changes a phase frequency characteristic of the filter unit independently of an amplitude frequency characteristic.   102. The voice editing program according to claim 101, wherein the filter characteristic changing unit sets a designated phase frequency characteristic in the filter unit.   The filter characteristic changing means is a filter means according to a designated phase frequency characteristic such that a total phase frequency characteristic of a specific sound output device and the filter means is the same as the designated phase frequency characteristic. 102. The audio editing program according to claim 101, wherein a phase frequency characteristic is derived and the derived phase frequency characteristic is set in the filter means.   The filter characteristic changing means is a filter according to a specified phase frequency characteristic so that a total phase frequency characteristic of the first speaker and the filter means is the same as the phase frequency characteristic of the second speaker. 102. The audio editing program according to claim 101, wherein a phase frequency characteristic of the means is derived, and the derived phase frequency characteristic is set in the filter means.   The audio editing program according to claim 101, wherein the filter characteristic changing unit changes the phase frequency characteristic of the filter unit and changes the amplitude frequency characteristic of the filter unit independently of the phase frequency characteristic.   106. The audio editing program according to claim 105, wherein the filter characteristic changing unit sets a designated phase frequency characteristic in the filter unit and sets a designated amplitude frequency characteristic in the filter unit.   The filter characteristic changing means is a filter means according to a designated phase frequency characteristic such that a total phase frequency characteristic of a specific sound output device and the filter means is the same as the designated phase frequency characteristic. The phase frequency characteristic of the specific acoustic output device and the filter means is the same as the specified amplitude frequency characteristic. 106. The audio editing program according to claim 105, wherein an amplitude frequency characteristic of the filter means corresponding to a designated amplitude frequency characteristic is derived so that the derived amplitude frequency characteristic is set in the filter means. The filter characteristic changing means is a filter according to a specified phase frequency characteristic so that a total phase frequency characteristic of the first speaker and the filter means is the same as the phase frequency characteristic of the second speaker. A phase frequency characteristic of the means is derived, the derived phase frequency characteristic is set in the filter means, and a total amplitude frequency characteristic of the first speaker and the filter means is an amplitude frequency of the second speaker. 106. The audio editing program according to claim 105, wherein an amplitude frequency characteristic of the filter means corresponding to a designated amplitude frequency characteristic is derived so as to be the same as the characteristic, and the derived amplitude frequency characteristic is set in the filter means. .

The filter characteristic changing means includes
Change characteristic designating means for designating the phase frequency characteristics of the filter means to be realized after the change in order to change the phase frequency characteristics of the filter means;
102. The audio editing program according to claim 101, further comprising: a filter coefficient setting unit that sets a filter coefficient corresponding to a phase frequency characteristic specified by the change characteristic specifying unit in the filter unit.
The filter characteristic changing means includes
Change characteristic designating means for designating the amplitude frequency characteristic and the phase frequency characteristic of the filter means to be realized after the change in order to change the amplitude frequency characteristic and the phase frequency characteristic of the filter means;
106. The acoustic device according to claim 105, further comprising: a filter coefficient setting unit that sets a filter coefficient corresponding to an amplitude frequency characteristic and a phase frequency characteristic specified by the change characteristic specifying unit in the filter unit.
The filter characteristic changing means includes
Change characteristic designating means for designating a total phase frequency characteristic of a specific sound output device and the filter means to be realized after changing the phase frequency characteristics of the filter means;
The filter coefficient setting means for setting a filter coefficient corresponding to the phase frequency characteristic of the filter means corresponding to the total phase frequency characteristic specified by the change characteristic specifying means in the filter means. Voice editing program.
The filter characteristic changing means includes
Change characteristic designation that designates the overall amplitude frequency characteristic and phase frequency characteristic phase frequency characteristic of a specific sound output device and the filter means to be realized after changing the amplitude frequency characteristic and phase frequency characteristic of the filter means Means,
Filter coefficient setting means for setting a filter coefficient corresponding to the amplitude frequency characteristic and phase frequency characteristic of the filter means corresponding to the total amplitude frequency characteristic and phase frequency characteristic specified by the change characteristic specifying means in the filter means; 106. A speech editing program according to claim 105, comprising:
  The audio editing program according to any one of claims 97 to 112, wherein the computer is incorporated in an audio device.

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