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WO2018186526A1 - Appareil de blocage de signal audio, et appareil de conversion de signal numérique équipé de celui-ci - Google Patents

Appareil de blocage de signal audio, et appareil de conversion de signal numérique équipé de celui-ci Download PDF

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Publication number
WO2018186526A1
WO2018186526A1 PCT/KR2017/005783 KR2017005783W WO2018186526A1 WO 2018186526 A1 WO2018186526 A1 WO 2018186526A1 KR 2017005783 W KR2017005783 W KR 2017005783W WO 2018186526 A1 WO2018186526 A1 WO 2018186526A1
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WIPO (PCT)
Prior art keywords
audio signal
timing
mute
voltage
unit
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Application number
PCT/KR2017/005783
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English (en)
Korean (ko)
Inventor
이정호
유승호
안지헌
김우석
Original Assignee
주식회사 아이리버
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from KR1020170066213A external-priority patent/KR102255596B1/ko
Application filed by 주식회사 아이리버 filed Critical 주식회사 아이리버
Priority to US16/603,163 priority Critical patent/US10826454B2/en
Publication of WO2018186526A1 publication Critical patent/WO2018186526A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones

Definitions

  • the present invention relates to an apparatus for muting an audio signal.
  • the invention also relates to an apparatus connected to an audio signal reproducing apparatus for converting a digital audio signal into an analog audio signal.
  • DAC digital to analog converter
  • the present invention has been made to solve the above problems, and proposes an audio signal muting apparatus that sets and adjusts timing for removing pop noise and mutes an audio signal based on the set and adjusted timings. It aims to do it.
  • the present invention has been made in order to achieve the above object, the timing setting unit for setting the timing for removing pop noise from the audio signal; A timing adjusting unit for adjusting the timing; And a mute control unit for muting the audio signal based on the timing.
  • the mute control unit includes: a first mute processing unit configured to mute the audio signal at a point in time where negative pop noise is present based on the timing; And a second mute processing unit configured to mute the audio signal at a time when there is positive pop noise based on the timing.
  • said first mute processing section and / or said second muting processing section comprises two voltage control elements.
  • the pins of the first voltage control element provided in the first mute processing unit are arranged to face the pins of the second voltage control element provided in the first mute processing unit, and the second mute processing unit
  • the pins of the third voltage control element provided are disposed to face the pins of the fourth voltage control element provided in the second mute processing unit.
  • the timing setting unit the first voltage adjusting element for adjusting the output voltage associated with the audio signal; And a first charging element connected in parallel to the first voltage regulating element.
  • one side of the first voltage regulation element is connected to a first current control element that receives a mute control signal for muting the audio signal, and the other side of the first voltage regulation element is connected to ground (GND). .
  • At least two timing adjusting units are provided.
  • the timing adjusting unit further comprises: a third voltage adjusting element configured to additionally adjust an output voltage with respect to the audio signal whose output voltage is adjusted by the timing setting unit; A second charging element connected in series with the third voltage regulating element through a first path; A fifth voltage adjusting element for further adjusting an output voltage with respect to the audio signal whose output voltage is adjusted by the third voltage adjusting element; And a fourth charging element connected in series with the fifth voltage regulating element.
  • one side of the third voltage regulating element is connected to a second current control element connected to a first current control element receiving a mute control signal for muting the audio signal, and the other of the third voltage regulating element.
  • a side is connected in series with the fifth voltage regulating element through a second path, one side of the fifth voltage regulating element is connected in series with the third voltage regulating element through the second path, and The other side is connected to the mute control unit.
  • the first current control element is a device connected to ground to perform a switching function
  • the second current control device is a device connected to a power source to perform a switching function
  • the timing setting unit sets the timing based on at least one pop noise having a magnitude greater than or equal to a first reference value, and the timing adjusting unit selects at least one pop noise having a magnitude greater than or equal to a second reference value smaller than the first reference value. Adjust the timing as a basis.
  • the present invention provides a conversion unit for converting the digital audio signal into an analog audio signal;
  • a clock generator which determines an operation timing when converting the digital audio signal into the analog audio signal based on the digital audio signal;
  • An amplifier for amplifying the analog audio signal;
  • an audio signal muting device for muting the analog audio signal based on timing for removing pop noise.
  • the audio signal muting apparatus the timing setting unit for setting a timing for removing pop noise from the analog audio signal; A timing adjusting unit for adjusting the timing; And a mute controller for muting the analog audio signal based on the timing.
  • the mute control unit includes: a first mute processing unit configured to mute the audio signal at a point in time where negative pop noise is present based on the timing; And a second mute processing unit configured to mute the audio signal at a time when there is positive pop noise based on the timing.
  • the present invention can achieve the following effects through the configuration for achieving the above object.
  • FIG. 1 is a block diagram schematically showing an internal configuration of a mute device according to an embodiment of the present invention.
  • FIG. 2 is a circuit diagram showing in detail the internal configuration of the mute device according to an embodiment of the present invention.
  • FIG. 3 is a reference diagram for explaining a function performed by a mute device according to an embodiment of the present invention.
  • FIG. 4 is a block diagram schematically illustrating an internal configuration of a digital signal conversion apparatus according to an embodiment of the present invention.
  • FIG. 5 is a conceptual diagram schematically showing an internal configuration of an audio signal muting apparatus according to a preferred embodiment of the present invention.
  • FIG. 6 is a conceptual diagram schematically illustrating an internal configuration of a digital signal conversion apparatus according to an exemplary embodiment of the present invention.
  • the present invention which can be applied to a digital signal conversion apparatus, proposes a mute apparatus for removing pop noise.
  • a mute device proposed in the present invention will be described in detail with reference to the drawings.
  • FIG. 1 is a block diagram schematically showing an internal configuration of a mute device according to an embodiment of the present invention.
  • the mute apparatus 100 includes a timing setting unit 110, a timing adjusting unit 120, a first muting processing unit 130, and a second muting processing unit 140.
  • An audio signal reproducing apparatus reproduces an audio signal.
  • Examples of the audio signal reproducing apparatus include a computer, an image device, an MP3 player, and an audio device inside a vehicle battlefield.
  • the audio signal reproducing apparatus may be implemented as, for example, a hifi audio module.
  • the digital signal converter preferably includes a mute device 100 to control the high output.
  • the mute device 100 proposed in the present invention may be included in the digital signal conversion device in consideration of the above points.
  • the mute device 100 has a configuration optimized for high output and may include a timing setting unit 110 and a timing adjusting unit 120 to adjust timing.
  • the timing setting unit 110 performs a function of first setting mute timing with respect to the audio signal when a high output audio signal is input. In detail, the timing setting unit 110 performs a function of catching the overall mute timing. The timing setting unit 110 may set a mute timing over the entire input audio signal to perform a function of catching the entire mute timing.
  • the timing adjusting unit 120 performs a function of adjusting the muting timing secondarily with respect to the audio signal in which the muting timing is primarily set by the timing setting unit 110. In detail, the timing adjusting unit 120 performs a function of capturing the fine timing of the mute. The timing adjusting unit 120 may perform a function of capturing the fine timing of the mute by adjusting the muting timing for each part of the audio signal in which the muting timing is set.
  • At least one timing adjusting unit 120 may be provided in this embodiment. Since the fine timing of the mutes is preferably performed at least twice to increase the timing accuracy, at least two timing adjusting units 120 are preferably provided in this embodiment.
  • the mute device 100 includes only the timing setting unit 110, a problem may occur in that the mute device 100 generates pop noise when the mute device 100 mutes the audio signal.
  • the mute device 100 includes at least one timing adjusting unit 120 together with the timing setting unit 110.
  • the first mute processing unit 130 may mute the audio signal based on the muting timing set and adjusted by the timing setting unit 110 and the timing adjusting unit 120 when a high output audio signal is input. Perform.
  • the digital signal conversion apparatus may be electrically connected to the audio signal reproducing apparatus to perform a function of improving the sound quality of the audio signal.
  • the first mute processing unit 130 included in the digital signal converter may mute the audio signal at a predetermined mute timing to remove pop noise generated when the digital signal converter is turned on / off. Perform.
  • the first mute processor 130 may remove pop noise, particularly negative pop noise, associated with the audio signal by first muting the audio signal.
  • the second mute processing unit 140 mutes timing set and adjusted by the timing setting unit 110 and the timing adjusting unit 120 when the input audio signal is primarily muted at the timing determined by the first muting processing unit 130. Performs a function of secondly muting this audio signal on the basis of.
  • the second mute processor 140 may remove the pop noise by muting the audio signal at a predetermined timing together with the first mute processor 130. In this case, the second mute processor 140 may remove positive pop noise associated with the audio signal.
  • the mute apparatus 100 may include only the first mute processor 130.
  • the first mute processor 130 may perform a function of removing positive pop noise as well as negative pop noise.
  • the concept of the mute device 100 proposed in the present invention has been described above with reference to FIG. 1.
  • the mute device 100 will be described as an embodiment by implementing a predetermined circuit.
  • FIGS. 1 and 2 are circuit diagram showing in detail the internal configuration of the mute device according to an embodiment of the present invention. The following description refers to FIGS. 1 and 2.
  • the timing setting unit 110 includes a first resistor 111 and a first capacitor 112.
  • the first resistor 111 and the first capacitor 112 have a structure connected in parallel.
  • the first resistor 111 is connected to a collector of the first transistor 201 to adjust an output voltage.
  • the first resistor 111 may be implemented as, for example, R64.
  • the first capacitor 112 In the case of the first capacitor 112, one side thereof is connected to the collector of the first transistor 201, and the other side thereof is connected to the ground GND.
  • the first capacitor 112 may be implemented as, for example, C222.
  • the emitter of the first transistor 201 is connected to the ground GND, and the base of the first transistor 201 is a mute signal input unit 211 for muting the audio signal in the audio signal reproducing apparatus. Is connected to.
  • the mute device 100 may further include a second resistor 221 connected in parallel with the first transistor 201.
  • the second resistor 221 one side thereof is connected to the mute signal input unit 211, and the other side thereof is connected to the ground GND.
  • the second resistor 221 may be implemented as R106 as a protection resistor.
  • At least two timing adjusting units 120 may be provided in the muting apparatus 100.
  • 2 illustrates an example in which two timing adjusting units 120 are provided in the mute apparatus 100.
  • the first timing adjusting unit 120a and the second timing adjusting unit 120b will be described in detail.
  • the first timing adjusting unit 120a includes a third resistor 121 and a second capacitor 122.
  • the third resistor 121 and the second capacitor 122 have a structure connected in series.
  • the third resistor 121 is connected to the collector of the second transistor 202 to adjust the output voltage.
  • the third resistor 121 may be implemented as, for example, R61.
  • the second capacitor 122 In the case of the second capacitor 122, one side thereof is connected to the collector of the second transistor 202, and the other side thereof is connected to the ground GND.
  • the second capacitor 122 may be implemented as, for example, C213.
  • the emitter of the second transistor 202 is connected to Vcc, and the base of the second transistor 202 is connected to the timing setting unit 110.
  • the mute device 100 may further include a fourth resistor 222 connected in parallel to the third resistor 121.
  • the fourth resistor 222 performs a function of adjusting the output voltage, and may be implemented as, for example, R62.
  • one side thereof is connected to the collector of the second transistor 202, and the other side thereof is connected to the ground GND.
  • the mute device 100 may further include a third capacitor 231 connected to the timing setting unit 110.
  • the third capacitor 231 one side thereof is connected to the first resistor 111 of the timing setting unit 110, and the other side thereof is connected to the ground GND.
  • the third capacitor 231 may be implemented as, for example, C218.
  • the second timing adjuster 120b includes a fifth resistor 123 and a fourth capacitor 124.
  • the fifth resistor 123 and the fourth capacitor 124 have a structure connected in series.
  • the fifth resistor 123 is connected to the first timing adjuster 120a to adjust the output voltage.
  • the fifth resistor 123 may be implemented as, for example, R63.
  • the fourth capacitor 124 In the case of the fourth capacitor 124, one side thereof is connected to the fifth resistor 123, and the other side thereof is connected to the ground GND.
  • the fourth capacitor 124 may be implemented as, for example, C219.
  • the mute device 100 may further include a fifth capacitor 232 and a sixth capacitor 233 connected to the second timing adjusting unit 120b.
  • the fifth capacitor 232 and the sixth capacitor 233 have a structure connected in parallel.
  • the fifth capacitor 232 In the case of the fifth capacitor 232, one side thereof is connected to the fifth resistor 123 of the second timing adjusting unit 120b, and the other side thereof is connected to the second muting processor 140.
  • the fifth capacitor 232 may be implemented as, for example, C216.
  • the sixth capacitor 233 similarly to the fifth capacitor 232, one side thereof is connected to the fifth resistor 123 of the second timing adjusting unit 120b, and the other side thereof is connected to the second muting processor 140. do.
  • the sixth capacitor 233 may be implemented as, for example, C217.
  • the second mute processing unit 140 may be implemented as a dual FET.
  • the fifth capacitor 232 and the sixth capacitor 233 may be connected to the FETs of the second mute processor 140, respectively.
  • the fifth capacitor 232 and the sixth capacitor 233 may be provided in the mute device 100 in an open form.
  • the first mute processing unit 130 includes a first field effect transistor (FET) 131 and a second FET 132.
  • FET field effect transistor
  • Pop noise is noise generated when power is supplied or interrupted, and refers to noise generated by a voltage of a charged capacitor when a circuit having a capacitor having a charged voltage is connected to another electric circuit.
  • the first mute processor 130 is implemented as a dual FET.
  • the first FET 131 and the second FET face each other. 132 is disposed to solve the above problem.
  • the first FET 131 is the timing setting unit 110 and the first timing adjusting unit 120a.
  • the audio signal is muted according to the timing determined by the second timing adjusting unit 120b to the second muting processing unit 140.
  • the second FET 132 may include the timing setting unit 110, the first timing adjusting unit 120a, and the like.
  • the audio signal is muted according to the timing determined by the second timing adjusting unit 120b and transmitted to the second muting processing unit 140.
  • the second mute processing unit 140 includes a third FET 141 and a fourth FET 142. Like the first mute processor 130, the second mute processor 140 may be implemented as a dual FET. In addition, the third FET 141 and the fourth FET 142 are disposed such that the drain and the source of the third FET 141 and the drain and the source of the fourth FET 142 face each other.
  • the third FET 141 is disposed at a timing determined by the timing setting unit 110, the first timing adjusting unit 120a, and the second timing adjusting unit 120b. Accordingly, the audio signal is muted and output through the right output terminal AUDIO_R_OUT 214.
  • the fourth FET 142 is timing determined by the timing setting unit 110, the first timing adjusting unit 120a, and the second timing adjusting unit 120b.
  • the audio signal is muted and output through the left output terminal AUDIO_L_OUT 215.
  • FIGS. 1 and 3 are reference diagrams for explaining a function performed by a mute device according to an embodiment of the present invention. The following description refers to FIGS. 1 and 3.
  • the mute device 100 proposed in the present invention is to remove pop noise generated when the power supply is turned on / off after the digital signal converter is mounted on the audio signal reproducing apparatus.
  • Pop noise includes negative pop noise 310 and positive pop noise 320.
  • the first mute processing unit 130 included in the mute apparatus 100 may remove the negative pop noise 310 by first muting the input audio signal according to a predetermined muting timing.
  • the second mute processor 140 provided in the mute device 100 mutes the audio signal subjected to the first mute by the first mute processor 130 secondly according to a predetermined muting timing, thereby positive pop noise 320. Can be removed.
  • the mute apparatus 100 proposed in the present invention has been described above with reference to FIGS. 1 to 3.
  • a digital signal converter having such a mute device 100 will be described.
  • FIG. 4 is a block diagram schematically illustrating an internal configuration of a digital signal conversion apparatus according to an embodiment of the present invention.
  • the digital signal conversion apparatus 400 includes a power supply unit 410, a clock generator 420, a converting unit 430, an amplifier 440, a mute unit 450, and a connection unit 460. .
  • the digital signal converter 400 is electrically connected to an audio signal reproducing apparatus (not shown) to perform a function of converting an audio signal from a digital signal to an analog signal.
  • an audio signal in a digital signal form is input from the audio signal reproducing apparatus
  • the digital signal converting apparatus 400 converts the audio signal into an analog signal form and transmits the audio signal to the audio signal reproducing apparatus.
  • the digital signal conversion apparatus 400 may contribute to outputting a high quality sound source by reproducing the digital content by the audio signal reproducing apparatus.
  • the digital signal conversion device 400 may be implemented modular in the present invention.
  • the digital signal converter 400 may easily change, replace, or upgrade the modules, so that the user can easily change the system according to the user's request.
  • the digital signal converter 400 may have a high current consumption in order to contribute to the audio signal reproducing apparatus outputting a high quality sound source.
  • the digital signal conversion device 400 may control the converting unit 430 and the amplifying unit 440 individually, thereby minimizing current consumption according to use.
  • the arrangement structure of the power supply unit 410, the converting unit 430, the amplifying unit 440, and the like within the digital signal converter 400 may be arbitrarily changed according to the purpose of noise reduction.
  • the position and connection relationship of the power supply unit 410, the converting unit 430, the amplifier 440, and the like within the digital signal conversion device 400 may have a design structure optimized for the flow of data or signals.
  • the arrangement and design of the digital signal converter 400 may be set using hardware or software. In changing the modules constituting the digital signal conversion device 400, initialization of the flow of data or signals may be required. Such initialization may be performed by a module embedded in the hardware itself, or may be received by a separate internet or mobile app. Can be set automatically.
  • the power supply unit 410 functions to supply electrical energy through a physical or chemical action to the clock generator 420, the converting unit 430, the amplifier 440, the mute unit 450, and the like.
  • the power supply unit 410 is not provided inside the digital signal converter 400, but may be located outside the digital signal converter 400 to supply power.
  • the power supply unit 410 may have a circuit structure for reducing noise when considering a noise sensitive characteristic of the hi-fi audio module.
  • the power supply unit 410 may include a plurality of power supply units (not shown) and noise removing units (not shown). In this case, the power supplies may be separated from each other and have an optimized voltage value to reduce noise.
  • the power supply may use a potential difference resulting from the ionization difference of the metal, and may include a primary battery that is not rechargeable and a rechargeable battery that is rechargeable.
  • the type of the power supply may be changed according to the characteristics of the audio signal reproducing apparatus.
  • the noise removing unit removes noise induced by the power supply unit 410.
  • the noise removing unit may have a circuit structure in which electrical elements are sequentially connected. At this time, the circuit structure primarily uses beads to remove high frequency noise, uses a low drop out (LDO) regulator as a second, uses a capacitor having a low series equivalent resistance in the third order, and uses a large capacity capacitor in a fourth order. Can be used.
  • LDO low drop out
  • the LDO regulator regulates the voltage linearly even when the supply voltage is very close to the output voltage.
  • LDO regulators offer low voltage drops, low ripple to reduce noise, and simple circuitry for low cost.
  • the clock generator 420 generates a clock signal for determining an operation timing of the digital signal converter 400.
  • the clock generator 420 may generate a master clock (MCLK), a left-right clock (LRCK), a bit clock (BITCLK), and the like.
  • MCLK stands for master clock.
  • the clock generator 420 may determine a final operation timing of the digital signal converter 400 using MCLK.
  • LRCK refers to the clock for the L (Left) and R (Right) channels of the digital audio signal. It may be set to 1 when the L channel information is transmitted, and may be set to 0 when the R channel information is transmitted.
  • BITCLK refers to a clock transmitted by engaging a bit that is the basis of a digital signal.
  • the clock generator 420 may determine whether the digital signal is 0 or 1 by synchronizing with the bit clock using the BITCLK.
  • the clock signals generated by the clock generator 420 are input to the audio signal reproducing apparatus. Since the clock generator 420 uses a clock generated by a phase locked loop (PLL), the clock generator 420 can accurately generate an analog signal.
  • the digital signal converter 400 may generate an analog signal of low jitter by directly making and using a clock through the clock generator 420.
  • the converting unit 430 converts the digital signal received from the audio signal reproducing apparatus into an analog signal using the synchronized control signal and the clock signals.
  • the converting unit 430 may be implemented as a plurality of modules. In this case, the converting unit 430 may convert a high quality analog signal through averaging of output noise. However, when the converting unit 430 is implemented as a plurality of modules, the consumption current may be increased, which may solve the above problem by individually controlling the current of the converting unit 430.
  • the converting unit 430 may have a spaced structure to prevent overlapping of portions in which digital noise may be induced on the internal circuit pattern.
  • the spacing structure may be spaced apart on a two-dimensional plane or spatially spaced in layers of other layers in three-dimensional space. In this case, the separation distance may have a predetermined value or more in consideration of the size and reproduction sound quality of the digital signal conversion apparatus 400.
  • Synchronization is to match the operation timing of the digital signal conversion device 400 and the audio signal reproducing device, which can be implemented by unifying the reference time of the clock signals.
  • synchronization may mean not only timing operation between modules but also data matching.
  • the amplifier 440 amplifies an analog signal which is an output of the converting unit 430.
  • the amplifier 440 may include a pre-amp for controlling an analog signal and a power-amp for amplifying a power, and an integrated amplifier in which the pre-amp and the power amplifier are combined. It is also possible to implement However, in this embodiment, the shape of the amplifier 440 is not limited thereto and may be arbitrarily changed according to the purpose and function of the digital signal converter 400.
  • the amplifier 440 may have a design optimized for the converting unit 430 to reduce noise.
  • the wiring of the internal circuit of the amplifier 440 may have a maximum spaced-out structure in order to prevent duplication of portions where digital noise may be induced.
  • Arrangement of the separation structure is the same as the case of the converting unit 430.
  • the separation distance may have a predetermined value or more in consideration of the size of the digital signal converter 400 and the reproduction sound quality.
  • the mute unit 450 performs a function of muting the audio signal based on a predetermined timing.
  • the mute unit 450 has the same concept as the mute apparatus 100 described above with reference to FIGS. 1 to 3. Therefore, a detailed description of the mute unit 450 is omitted here.
  • connection unit 460 electrically or mechanically connects the digital signal converter 400 to the audio signal reproducing apparatus, and serves as a path for the electrical signal between the digital signal converter 400 and the audio signal reproducing apparatus.
  • the connection unit 460 receives an audio signal from the audio signal reproducing apparatus and transmits the audio signal to the converting unit 430, and may include an insulating material to prevent electrical signals from flowing into the air or the user's body.
  • FIG. 5 is a conceptual diagram schematically showing an internal configuration of an audio signal muting apparatus according to a preferred embodiment of the present invention.
  • the audio signal muting apparatus 500 includes a timing setting unit 510, a timing adjusting unit 520, a muting control unit 530, a first power supply unit 540, and a first main control unit 550.
  • the first power supply unit 540 supplies power to each component of the audio signal muting apparatus 500.
  • the first main controller 550 performs a function of controlling the overall operation of each component of the audio signal muting apparatus 500. Considering that the audio signal muting device 500 is provided in the digital signal conversion device 600 to be described later with reference to FIG. 6, the first power supply unit 540 and the first main control unit 550 are not provided in this embodiment. You don't have to.
  • the timing setting unit 510 sets a timing for removing pop noise from the audio signal.
  • the timing setting unit 510 has the same concept as the timing setting unit 110 of FIG.
  • the timing setting unit 510 may include a first voltage adjusting element and a first charging element.
  • the first voltage regulating element is to adjust the output voltage associated with the audio signal.
  • the first voltage regulating element is connected to a first current control element whose one side receives a mute control signal for muting the audio signal, and the other side thereof is connected to ground GND.
  • the first voltage regulating element is a concept corresponding to the first resistor of FIG. 2, and the first current control element is a concept corresponding to the first transistor of FIG. 2.
  • the first charging element is connected in parallel to the first voltage regulation element.
  • the first charging element is a concept corresponding to the first capacitor of FIG. 2.
  • the timing adjusting unit 520 adjusts the timing when the timing for removing pop noise is set by the timing setting unit 510.
  • the timing adjusting unit 520 has the same concept as the timing adjusting unit 120 of FIG.
  • At least two timing adjusting units 520 may be provided in the audio signal muting apparatus 500.
  • the timing adjusting unit 520 may include a third voltage adjusting element, a second charging element, a fifth voltage adjusting element, and a fourth charging element. have.
  • the third voltage adjusting element performs a function of additionally adjusting the output voltage with respect to the audio signal whose output voltage is adjusted by the timing setting unit 510.
  • the third voltage regulating element is connected to a second current control element connected at one side thereof to a first current control element receiving a mute control signal for muting the audio signal, and the other side of the third voltage regulating element is controlled at the fifth voltage through the second path. It is connected in series with the device.
  • the first current control element is a device connected to a ground to perform a switching function
  • the second current control device is a device connected to a power supply to perform a switching function.
  • the third voltage regulating element is a concept corresponding to the third resistor of FIG. 2
  • the second current control element is a concept corresponding to the second transistor of FIG. 2.
  • the fifth voltage regulating element has a concept corresponding to the fifth resistor of FIG. 2.
  • the fifth voltage regulating element performs a function of additionally adjusting the output voltage with respect to the audio signal whose output voltage is adjusted by the third voltage regulating element.
  • One side of the fifth voltage regulating element is connected in series to the third voltage regulating element through the second path, and the other side thereof is connected to the mute controller.
  • the second charging element is connected in series to the third voltage regulating element through the first path, and the fourth charging element is connected in series to the fifth voltage regulating element.
  • the second charging element is a concept corresponding to the second capacitor of FIG. 2
  • the fourth charging element is a concept corresponding to the fourth capacitor of FIG. 2.
  • the timing setting unit 510 performs a function of catching the entire mute timing in this embodiment, and the timing adjusting unit 520 performs a function of catching fine timing of the mute in this embodiment.
  • the timing setting unit 510 may set the timing based on at least one pop noise whose magnitude is greater than or equal to the first reference value, and the timing adjustment unit 520 is greater than or equal to the second reference value whose magnitude is smaller than the first reference value. Timing may be adjusted based on at least one pop noise.
  • the mute control unit 530 mutes the audio signal based on the timing when the timing for removing pop noise is set and adjusted by the timing setting unit 510 and the timing adjusting unit 520.
  • the mute controller 530 may include a first mute processor 531 and a second mute processor 532.
  • the first mute processing unit 531 performs a function of muting the audio signal at the time when negative pop noise is present based on the timing.
  • the first mute processing unit 531 is the same concept as the first mute processing unit 130 of FIG.
  • the second mute processing unit 532 performs a function of muting the audio signal at the time when there is positive pop noise based on the timing.
  • the second mute processing unit 532 has the same concept as the second mute processing unit 140 of FIG.
  • At least one of the first mute processor 531 and the second mute processor 532 may include two voltage control elements.
  • the pins of the first voltage control element provided in the first mute processing unit 531 are second voltage controlled provided in the first mute processing unit 531. It may be arranged to face the pins of the device.
  • the pins of the third voltage control element provided in the second mute processing unit 532 and the pins of the fourth voltage control element provided in the second mute processing unit 532 may be disposed to face each other.
  • the first voltage control element is a concept corresponding to the first FET of FIG. 2
  • the second voltage control element is a concept corresponding to the second FET of FIG. 2.
  • the pins of each voltage control element correspond to the drain and source of the FET.
  • FIG. 6 is a conceptual diagram schematically illustrating an internal configuration of a digital signal conversion apparatus according to an exemplary embodiment of the present invention.
  • the digital signal converter 600 includes a converting unit 610, a clock generator 620, an amplifier 630, a second power supply unit 640, a second main control unit 650, and an audio signal mute. Device 500.
  • the second power supply 640 performs a function of supplying power to each component of the digital signal converter 600.
  • the second main controller 650 performs a function of controlling the overall operation of each component of the digital signal conversion apparatus 600.
  • the second power supply unit 640 and the second main control unit 650 may not be provided in this embodiment. .
  • the converting unit 610 converts the digital audio signal into an analog audio signal.
  • the converting unit 610 is the same concept as the converting unit 430 of FIG.
  • the clock generator 620 determines the operation timing when converting the digital audio signal into an analog audio signal based on the digital audio signal.
  • the clock generator 620 has the same concept as the clock generator 420 of FIG.
  • the amplifier 630 amplifies the analog audio signal.
  • the amplifier 630 is the same concept as the amplifier 440 of FIG.
  • the audio signal muting apparatus 500 performs a function of muting the analog audio signal based on timing for removing pop noise.
  • the audio signal muting apparatus 500 has been described above with reference to FIG. 5, and a detailed description thereof will be omitted.
  • the present invention is not necessarily limited to these embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more.
  • all of the components may be implemented in one independent hardware, each or some of the components of the components are selectively combined to perform some or all of the functions combined in one or a plurality of hardware It may be implemented as a computer program having a.
  • such a computer program is stored in a computer readable medium such as a USB memory, a CD disk, a flash memory, and the like, and is read and executed by a computer, thereby implementing embodiments of the present invention.
  • the recording medium of the computer program may include a magnetic recording medium, an optical recording medium and the like.
  • the present invention can be applied to a digital signal conversion apparatus connected to an audio signal reproducing apparatus and converting a digital audio signal into an analog audio signal.
  • the present invention can be applied to an audio signal reproducing apparatus such as a computer, an image device, an MP3 player, and an audio device inside a vehicle battlefield.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

La présente invention concerne un appareil de blocage de signal audio qui configure et règle la synchronisation pour éliminer le bruit de claquement, et sur la base de la temporisation configurée et réglée, atténue un signal audio. De plus, la présente invention concerne un appareil de conversion de signal numérique relié à un appareil de lecture de signal audio de sorte que, lorsqu'un signal audio numérique est converti en un signal audio analogique, le signal audio analogique soit atténué sur la base de la temporisation pour éliminer le bruit de claquement.
PCT/KR2017/005783 2017-04-07 2017-06-02 Appareil de blocage de signal audio, et appareil de conversion de signal numérique équipé de celui-ci WO2018186526A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/603,163 US10826454B2 (en) 2017-04-07 2017-06-02 Audio signal muting apparatus, and digital signal conversion apparatus equipped with same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2017-0045406 2017-04-07
KR20170045406 2017-04-07
KR1020170066213A KR102255596B1 (ko) 2017-04-07 2017-05-29 오디오 신호 뮤트 장치 및 이를 구비하는 디지털 신호 변환 장치
KR10-2017-0066213 2017-05-29

Publications (1)

Publication Number Publication Date
WO2018186526A1 true WO2018186526A1 (fr) 2018-10-11

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CN114125660A (zh) * 2021-11-23 2022-03-01 深圳市长丰影像器材有限公司 一种消除开机爆破音的音频系统及供电控制方法
CN119946503A (zh) * 2025-02-07 2025-05-06 广州市迪士普音响科技有限公司 数字音频分配系统及数字音频分配方法

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KR20080067237A (ko) * 2007-01-15 2008-07-18 주식회사 대우일렉트로닉스 팝 노이즈 제거 장치 및 그 방법
JP2008193341A (ja) * 2007-02-02 2008-08-21 Matsushita Electric Ind Co Ltd ポップノイズ低減回路
KR100860022B1 (ko) * 2001-12-27 2008-09-25 주식회사 엘지이아이 팝 노이즈 발생 방지 장치
US20100004936A1 (en) * 2008-07-04 2010-01-07 Chun-Chen Chao Audio output apparatus capable of suppressing pop noise
KR20100049199A (ko) * 2008-11-03 2010-05-12 엘지전자 주식회사 오디오 기기의 뮤트 제어 장치

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KR100860022B1 (ko) * 2001-12-27 2008-09-25 주식회사 엘지이아이 팝 노이즈 발생 방지 장치
KR20080067237A (ko) * 2007-01-15 2008-07-18 주식회사 대우일렉트로닉스 팝 노이즈 제거 장치 및 그 방법
JP2008193341A (ja) * 2007-02-02 2008-08-21 Matsushita Electric Ind Co Ltd ポップノイズ低減回路
US20100004936A1 (en) * 2008-07-04 2010-01-07 Chun-Chen Chao Audio output apparatus capable of suppressing pop noise
KR20100049199A (ko) * 2008-11-03 2010-05-12 엘지전자 주식회사 오디오 기기의 뮤트 제어 장치

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114125660A (zh) * 2021-11-23 2022-03-01 深圳市长丰影像器材有限公司 一种消除开机爆破音的音频系统及供电控制方法
CN114125660B (zh) * 2021-11-23 2023-08-15 深圳市长丰影像器材有限公司 一种消除开机爆破音的音频系统及供电控制方法
CN119946503A (zh) * 2025-02-07 2025-05-06 广州市迪士普音响科技有限公司 数字音频分配系统及数字音频分配方法
CN119946503B (zh) * 2025-02-07 2025-10-03 广州市迪士普音响科技有限公司 数字音频分配系统及数字音频分配方法

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