WO2018108061A1

WO2018108061A1 - Signal processing method, apparatus, terminal and computer storage medium

Info

Publication number: WO2018108061A1
Application number: PCT/CN2017/115564
Authority: WO
Inventors: 孙东平
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-12-13
Filing date: 2017-12-12
Publication date: 2018-06-21
Also published as: CN108231057A

Abstract

Disclosed are a signal processing method, an apparatus (50), a terminal (60) and a computer storage medium. The signal processing method comprises: when an audio signal is acquired, enabling a signal generator (602) to obtain a plurality of coherent carrier signals (101), wherein the carrier signals are signals having the same vibration direction, the same vibration frequency and the same phase, or are signals with the same vibration direction, the same vibration frequency and the constant phase difference; according to the plurality of coherent carrier signals and an audio signal to be modulated generated by the audio signal, determining an output signal (102); and outputting the output signal by means of a signal transmission hole (604) provided on the terminal (60) (103).

Description

Signal processing method, device, terminal and computer storage medium

Cross-reference to related applications

The present application is based on a Chinese patent application filed on Jan. 13, 2016, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present invention relates to the field of signal processing technologies, and in particular, to a signal processing method, apparatus, terminal, and computer storage medium.

Background technique

With the continuous development of electronic and communication technologies, smart terminals are becoming more and more powerful and more powerful. The popularity of intelligent terminals has become a necessity in the life of users. It takes a lot of time for users to make calls, listen to music, watch videos, watch news, etc. through mobile terminals.

The use of mobile terminals often occurs outdoors. For example, when people are away from home, they often need to make phone calls with family members or friends, or they are bored on the road, want to listen to music or watch videos, but because they are in public, When making a phone call, a private conversation does not want to be heard by others, or when listening to music or watching a video, it may cause interference to others. Therefore, when the mobile terminal transmits sound signals, due to the serious spread of sound, Users are bothered.

Summary of the invention

In order to solve the existing technical problems, embodiments of the present invention provide a signal processing method, apparatus, terminal, and computer storage medium.

The embodiment of the invention provides a signal processing method, including:

When acquiring the audio signal, the activation signal generator obtains a plurality of coherent carrier signals, the carrier signals being signals having the same vibration direction, the same vibration frequency, and the same phase, or a signal having the same vibration direction and the same vibration frequency and a constant phase difference;

Determining an output signal according to the multi-beam coherent carrier signal and the audio signal to be modulated generated by the audio signal;

The output signal is output through a signal transmission hole provided on the terminal.

Optionally, the activation signal generator obtains a plurality of coherent carrier signals, including:

The signal generator is activated to acquire a carrier signal, and the carrier signal is coherently processed to generate a plurality of coherent carrier signals.

Optionally, the starting the signal generator, acquiring a carrier signal, performing coherent processing on the carrier signal to generate a plurality of coherent carrier signals, including:

Starting an ultrasonic generator, acquiring an ultrasonic signal, performing coherent processing on the ultrasonic signal to generate a plurality of coherent ultrasonic signals;

Or, starting a laser generator, acquiring a laser signal, performing coherent processing on the laser signal to generate a plurality of coherent laser signals;

Alternatively, the infrared generator is activated to obtain an infrared signal, and the infrared signal is coherently processed to generate a plurality of coherent infrared signals.

Optionally, the determining the output signal according to the multi-beam coherent carrier signal and the to-be-modulated audio signal includes:

Modulating the to-be-modulated audio signal onto the multi-beam coherent carrier signal to obtain a modulated audio signal;

The modulated audio signal is amplified to obtain the output signal.

Optionally, before determining the output signal according to the to-be-modulated audio signal generated by the multi-beam coherent carrier signal and the audio signal, the method includes:

Digital signal processing is performed on the audio signal to generate an audio signal to be modulated.

An embodiment of the present invention provides a signal processing apparatus, including: an acquiring unit, a determining unit, and an output unit, where

The acquiring unit is configured to: when the audio signal is acquired, the activation signal generator obtains a plurality of coherent carrier signals, wherein the carrier signals have the same vibration direction and the same vibration frequency, and Signals of the same phase, or signals having the same vibration direction, the same vibration frequency, and a constant phase difference;

The determining unit is configured to determine an output signal according to the multi-beam coherent carrier signal and the audio signal to be modulated generated by the audio signal;

The output unit is configured to output the output signal through a signal output hole provided on the terminal.

Optionally, the device further includes: a processing unit,

The acquiring unit is configured to start the signal generator to acquire a carrier signal;

The processing unit is configured to perform coherent processing on the carrier signal to generate a plurality of coherent carrier signals.

Optionally, the acquiring unit is configured to start an ultrasonic generator to acquire an ultrasonic signal, and the processing unit is configured to coherently process the ultrasonic signal to generate a plurality of coherent ultrasonic signals;

Or the acquiring unit is configured to start a laser generator to acquire a laser signal, and the processing unit is configured to coherently process the laser signal to generate a plurality of coherent laser signals;

Alternatively, the acquiring unit is configured to activate an infrared generator to acquire an infrared signal, and the processing unit is configured to perform coherent processing on the infrared signal to generate a plurality of coherent infrared signals.

Optionally, the acquiring unit is configured to modulate the to-be-modulated audio signal onto the multi-beam coherent carrier signal to obtain a modulated audio signal, and further configured to amplify the modulated audio signal Processing, obtaining the output signal.

Optionally, the apparatus further includes: a processing unit configured to perform digital signal processing on the audio signal to generate an audio signal to be modulated.

An embodiment of the present invention provides a terminal, including: a first processor, a signal generator, a modulation circuit, and a signal transmission hole, where

The first processor is configured to: when the audio signal is acquired, the startup signal generator obtains a plurality of coherent carrier signals, wherein the carrier signals have the same vibration direction and the same vibration frequency, And signals having the same phase, or signals having the same vibration direction, the same vibration frequency, and a constant phase difference;

The modulating circuit is configured to determine an output signal according to the multi-beam coherent carrier signal and the audio signal to be modulated generated by the audio signal;

The signal transmission hole is configured to output the output signal.

Optionally, the first processor is configured to start the signal generator, acquire a carrier signal, perform coherent processing on the carrier signal, and generate a multi-beam coherent carrier signal.

Optionally, the first processor is configured to start an ultrasonic generator, acquire an ultrasonic signal, perform coherent processing on the ultrasonic signal, and generate a plurality of coherent ultrasonic signals;

Alternatively, the first processor is configured to activate a laser generator, acquire a laser signal, perform coherent processing on the laser signal, and generate a plurality of coherent laser signals;

Alternatively, the first processor is configured to activate an infrared generator, acquire an infrared signal, and perform coherent processing on the infrared signal to generate a plurality of coherent infrared signals.

Optionally, the terminal further includes: an audio amplifier,

The modulating circuit is configured to modulate the to-be-modulated audio signal onto the multi-beam coherent carrier signal to obtain a modulated audio signal;

The audio amplifier is configured to perform amplification processing on the modulated audio signal to obtain the output signal.

Optionally, the terminal further includes: a second processor configured to perform digital signal processing on the audio signal to generate an audio signal to be modulated.

Embodiments of the present invention also provide a computer storage medium having stored thereon a computer program that, when executed by a processor, implements the steps of any of the above methods.

Embodiments of the present invention provide a signal processing method, apparatus, terminal, and computer storage medium. When an audio signal is acquired, a start signal generator obtains a plurality of coherent carrier signals, wherein the carrier signals have the same vibration direction and vibrate a signal having the same frequency and the same phase, or a signal having the same vibration direction and the same vibration frequency and a constant phase difference; determining an output signal according to the multi-beam coherent carrier signal and the audio signal to be modulated generated by the audio signal The output signal is output through a signal transmission hole provided on the terminal. Signal provided by embodiment of the present invention The processing method, the device, the terminal and the computer storage medium modulate the audio signal onto the coherent carrier signal to form an output signal for directional transmission. Since the carrier signal has strong and controllable directivity, the intersection of the two beams can be Forming a small range of reverberation regions in which the modulation signal interferes, and the carrier signal can be cancelled, and the original signal, that is, the audio signal, is left, and the sound can be heard when the human ear is in this region, thereby The directional transmission of the sound is realized, the sound diffusion is reduced, and the interference of the sound to nearby people is avoided.

DRAWINGS

In the drawings, which are not necessarily to scale, the The drawings generally illustrate the various embodiments discussed herein by way of example and not limitation.

1 is a schematic flowchart 1 of a signal processing method according to an embodiment of the present invention;

2 is a schematic diagram of speaker path selection according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of signal transmission according to an embodiment of the present invention; FIG.

4 is a schematic diagram of ultrasonic signal processing according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of signal demodulation according to an embodiment of the present invention;

FIG. 6 is a second schematic flowchart of a signal processing method according to an embodiment of the present disclosure;

FIG. 7 is a schematic flowchart 3 of a signal processing method according to an embodiment of the present disclosure;

8 is a schematic flowchart 4 of a signal processing method according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram 1 of a signal processing apparatus according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram 2 of a signal processing apparatus according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram 1 of a terminal according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram 2 of a terminal according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings.

The embodiment of the invention provides a signal processing method. As shown in FIG. 1 , the method may include:

Step 101: When acquiring an audio signal, the startup signal generator obtains a plurality of coherent carrier signals.

The carrier signal is a signal having the same vibration direction, the same vibration frequency, and the same phase, or a signal having the same vibration direction, the same vibration frequency, and a constant phase difference.

In the embodiment of the present invention, the activation signal generator obtains a plurality of coherent carrier signals, which may be implemented by a signal processing device. The signal processing device may be a terminal, and the terminal may be a terminal device having an audio playing function, for example, a mobile phone. , PAD (tablet), PMP (portable multimedia player), etc.

In the embodiment of the present invention, the speaker already existing on the existing terminal is retained, and a “pseudo speaker” is added. This “pseudo speaker” can be understood as a device for outputting the signal output. The use of "pseudo-speaker" can be selected by two-selection strobe switch. The strobe switch mainly selects the existing speaker and "pseudo-speaker" of the terminal, that is, whether the sound signal is transmitted through ordinary speakers or "pseudo-speaker". The choice of the speaker's propagation path is shown in Figure 2.

"Pseudo-speaker" can be understood as an opening, ie a signal transmission hole, which can transmit the output signal. This opening is small, because there are many output signals sent out, between the transmitting end and the receiving end. Just like establishing a connection, and the transmitting end is like a light source, the output signal is diverged and emitted. Since the carrier signals such as ultrasonic waves, lasers and infrared rays have strong directivity, the area of the wave radiated from the transmitting end is not large. As shown in Figure 3, the transmitting end radiates the output signal, and only the person in the radiating area can hear the sound. The principle of hearing the sound is the principle of demodulation. In the radiation area, when the modulation signal occurs at the ear, In the case of interference, the carrier signal can be cancelled, and the original signal, that is, the sound signal, remains, and the sound is heard.

In an embodiment, the method may further include: receiving an operation instruction of the user, and opening the directional transmission function.

Specifically, the user opens the relevant settings of the mobile phone terminal, and selects whether to adopt the directional propagation, that is, whether to open the directional communication function of the mobile phone terminal. Mobile phone terminals default to non-directional communication, which is the same as ordinary mobile phone terminals. Whether to open the function of directional propagation, here is the judgment of the choice of directional propagation function, if you do not choose the directional propagation function, then That is the default mobile terminal settings. At this time, the mobile terminal is the same as the ordinary mobile phone, and there is no directional communication function. If you choose the function of directed propagation, be sure to select the directed propagation function.

Specifically, the signal processing device determines whether the directional propagation function of the terminal is turned on. When it is determined that the directional propagation function is turned on, the signal processing device acquires an audio signal, activates the signal generator, acquires a carrier signal, and performs coherence on the carrier signal. Processing generates a plurality of coherent carrier signals.

In a possible implementation, the ultrasonic generator is activated to acquire an ultrasonic signal, and the ultrasonic signal is coherently processed to generate a plurality of coherent ultrasonic signals.

In a possible implementation manner, the laser generator is activated to acquire a laser signal, and the laser signal is coherently processed to generate a plurality of coherent laser signals.

In a possible implementation manner, an infrared generator is activated to acquire an infrared signal, and the infrared signal is coherently processed to generate a plurality of coherent infrared signals.

Step 102: Determine an output signal according to the multi-beam coherent carrier signal and the audio signal to be modulated generated by the audio signal.

Specifically, the signal processing device modulates the to-be-modulated audio signal onto the multi-beam coherent carrier signal to obtain a modulated audio signal, and performs amplification processing on the modulated audio signal to obtain the output signal.

Specifically, the directional propagation of sound mainly relies on a coherent carrier signal, and the coherent signal mainly satisfies the same vibration direction, the same vibration frequency, the same phase, or a constant phase difference. In the embodiment of the present invention, the sound signals are separately modulated onto the coherent carrier signal to form a modulated signal, and the carrier signals used are ultrasonic, laser, infrared, and the like, respectively. Since the carrier signal has strong and controllable directivity, the intersection of the two beams can form a small sound-reducing area. In this area, the modulation signal interferes, and the carrier signal can be cancelled. The original signal remains, that is, the sound signal. When the human ear is in this area, the sound can be heard, and once the human ear leaves the area, it can not be heard, thereby realizing the directional transmission of the sound.

In an embodiment, before the determining the output signal according to the multi-beam coherent carrier signal and the audio signal to be modulated generated by the audio signal, the method may further include:

Step 103: Output the output signal through a signal transmission hole.

Specifically, a signal transmission hole is disposed on the terminal, and the output signal processed by the signal processing method provided by the embodiment of the present invention is output from the signal transmission hole, and is transmitted to the human ear through the air, and is solved at the human ear. Adjust, restore the sound signal.

Illustratively, an ultrasonic signal generator is taken as an example for designing a mobile phone terminal directional transmission system based on an ultrasonic coherent signal. The basic hardware components of the mobile phone terminal include a baseband processor, a power module, a radio frequency module, and an LCD module. The mobile phone terminal further comprises a second-selecting strobe switch, a DSP (Digital Signal Processing) unit, a signal modulating unit, an audio amplifying circuit, a pseudo speaker that can be directionally transmitted, an ultrasonic signal generator, and a coherent signal processing unit.

The two-selection strobe switch is mainly controlled by software, and is configured to select the original speaker and the pseudo-speaker of the mobile terminal. When the original speaker of the mobile terminal is selected, the mobile phone has no difference from the ordinary mobile phone; if a pseudo speaker is selected, Embodiments of the present invention provide sound directed propagation implemented by a signal processing method.

a DSP unit configured to process an audio signal to generate a signal to be modulated that can be modulated onto the ultrasonic signal; an ultrasonic generator configured to generate an ultrasonic signal; a coherent signal processing unit configured to effect signal coherent transformation; signal modulation The unit is configured to perform modulation of the sound signal onto the coherent ultrasonic signal, and then amplify the signal through the audio amplifying circuit, and transmit the signal through the “pseudo speaker”, and the “pseudo speaker” is configured to realize the directional propagation of the modulated signal. , has achieved the function of sound directed propagation. Specifically, as shown in Figure 4.

It should be noted that the selection function of the "pseudo speaker" can be realized by a computer application (App, Application), and the implementation principle can be realized by controlling a two-selection strobe switch.

Specifically, at a human ear, receiving a directional propagation signal, obtaining an audio signal by interference of the directional propagation signal, specifically canceling a plurality of coherent carrier signals in the directional propagating signal by interference of the directional propagating signal, audio signal.

Among them, the sound-directed propagation is actually a small area of sound transmission. Because the ultrasonic wave has a strong directivity, it is easy to concentrate on a certain area, which is near the human ear. By propagating near our ears, directional propagation is achieved. Since the carrier signal is coherent, the modulated signal is easily interfered in the human ear region, so that the ultrasonic signals cancel each other out, leaving only the sound signal. Sound signal demodulation function, finally finished It became the directional propagation and restoration of sound. The process of demodulation is as shown in FIG. 5, and the modulation signal in FIG. 5 is the output signal obtained in step 105.

The above signal processing method will be described by realizing directional propagation of sound using an ultrasonic signal as a carrier signal. When the directional propagation function is selected, the sound signal of the mobile terminal is input to the DSP unit for processing, and the ultrasonic generator is activated to generate a carrier signal, which is coherently processed, then modulated, and passed through a "pseudo speaker" that can be directionally propagated. Propagation, when the human ear receives the modulated signal, because of the principle of interference, the coherent ultrasonic signals cancel each other out, and at the same time restore the original sound signal, completing the directional propagation. The specific implementation process is shown in the process diagram shown in Figure 6, which specifically includes:

Step 201: The terminal receives a first operation instruction of the user, where the first operation instruction indicates to open a setting option of the terminal.

Specifically, the user may perform a first operation on the mobile phone terminal, where the first operation may be a touch operation or a button operation, and the mobile terminal receives the first operation instruction of the user, and opens a setting option of the terminal, where the setting option is Whether to use directional propagation to make choices. Usually, the mobile terminal can be non-directionally broadcasted by default, that is, the same as a normal mobile terminal.

Step 202: The terminal receives a second operation instruction of the user, where the second operation instruction indicates that the function of the directed propagation is turned on.

Specifically, the user may perform a second operation in the setting option of the mobile phone terminal, where the second operation may be a touch operation or a button operation, and the mobile terminal receives the second operation instruction of the user, and opens the function of directed propagation, where the user The operation of the setting option in the mobile terminal is also the choice of the directional propagation function. If you do not choose the directional communication function, it is the default mobile terminal settings. At this time, the mobile phone is the same as the ordinary mobile phone, and there is no directional communication function.

Step 203: The terminal starts the ultrasonic generator, acquires an ultrasonic signal, and performs coherent processing on the ultrasonic signal to generate a plurality of coherent ultrasonic signals.

Specifically, if the user selects the function of the directional propagation, the ultrasonic generator needs to be activated, and the ultrasonic signal is generated at the same time, and the generated ultrasonic signal is coherently processed, and the ultrasonic signal is converted into a multi-beam coherent ultrasonic signal by coherent processing, coherent The ultrasonic signal will be used as a carrier signal.

Step 204: The terminal acquires an audio signal, inputs the audio signal to the DSP unit, and processes the sound signal through the DSP unit to generate a sound signal that can be modulated.

Specifically, step 203 and step 204 can be performed simultaneously by performing digital signal processing on the audio signal to facilitate better modulation.

Step 205: The terminal modulates the sound signal to the coherent ultrasonic signal, and performs amplification processing on the modulated sound signal to obtain an output signal.

Specifically, the sound signal is modulated, the sound signal is modulated onto the coherent ultrasonic signal, and the modulated sound signal is amplified to obtain an output signal.

Step 206: The terminal outputs the output signal through a signal transmission hole.

Specifically, the modulated signal is transmitted through a "pseudo-speaker" that can realize directional propagation, that is, an output signal is output, and the output signal meets at the human ear, and interference occurs at the same time. Due to the interference phenomenon, the coherent ultrasonic carrier signals cancel each other and restore The original sound signal came out and the function of directional propagation was completed.

Illustratively, taking a laser signal generator as an example, the design of a mobile terminal directional transmission system based on a laser coherent signal, the basic hardware components of the mobile terminal include a baseband processor, a power module, a radio frequency module, and an LCD module, etc. The mobile phone terminal further includes a second-selecting strobe switch, a DSP unit, a signal modulating unit, an audio amplifying circuit, a pseudo speaker that can be directionally transmitted, a laser signal generator, and a coherent signal processing unit.

The laser signal generator is configured to generate a laser signal, and the functions of the other devices are the same as those of the device in the ultrasonic generator example described above, and the examples are not described herein.

Because the laser has a strong directionality, it is easy to concentrate on a certain area, which is near our ears. By propagating to the vicinity of our ears, directional propagation is achieved. Since the carrier signal is coherent, the modulated signal is easily interfered in the human ear region, so that the laser signals cancel each other, leaving only the sound signal. The function of demodulating the sound signal finally completes the directional propagation and restoration of the sound.

The above signal processing method will be described by realizing directional propagation of sound using a laser signal as a carrier signal. When the directional propagation function is selected, the sound signal of the mobile terminal is input to the DSP unit for processing, and the laser generator is started to generate a carrier signal, and is coherently processed, and then Modulation is carried out and propagated through a "pseudo-speaker" that can be directed to propagate. When the modulated signal is received at the human ear, the coherent laser signals cancel each other out due to the principle of interference, and the original sound signal is restored, and the signal is completed. Directional communication. The specific implementation process is shown in the flow chart shown in Figure 7, which specifically includes:

Step 301: The terminal receives a first operation instruction of the user, where the first operation instruction indicates to open a setting option of the terminal.

Step 302: The terminal receives a second operation instruction of the user, where the second operation instruction indicates that the function of the directional propagation is turned on.

Step 303: The terminal starts the laser generator, acquires a laser signal, and performs coherent processing on the laser signal to generate a plurality of coherent laser signals.

Specifically, if the user selects the function of directional propagation, the laser generator needs to be activated, and a laser signal is generated at the same time, and the generated laser signal is coherently processed, and the laser signal is converted into a multi-beam coherent laser signal by coherent processing, coherent The laser signal will be used as a carrier signal.

Step 304: The terminal acquires an audio signal, inputs the audio signal to the DSP unit, and processes the sound signal through the DSP unit to generate a sound signal that can be modulated.

Specifically, steps 303 and 304 can be performed simultaneously by digitally processing the audio signal for better modulation.

Step 305: The terminal modulates the sound signal to the coherent laser signal, and performs amplification processing on the modulated sound signal to obtain an output signal.

Step 306: The terminal outputs the output signal through a signal transmission hole.

Specifically, the modulated signal is transmitted through a “pseudo-speaker” that can realize directional propagation, that is, an output signal is output, and the output signal meets at the human ear, and interference occurs at the same time. Due to the interference phenomenon, the coherent laser carrier signals cancel each other and restore. The original sound signal came out and the function of directional propagation was completed.

Specifically, the implementation of the steps 301 to 306 can refer to the steps of the foregoing ultrasonic signal as a carrier signal, which is not described herein again.

Illustratively, an infrared signal generator is taken as an example for illustration, based on an infrared coherent signal. The design of the directional transmission system of the mobile terminal, the basic hardware components of the mobile terminal include a baseband processor, a power module, a radio frequency module and an LCD module, etc. The mobile terminal further includes a strobe switch, a DSP unit, a signal modulating unit, and an audio. Amplifying circuit, pseudo speaker capable of directional transmission, infrared signal generator and coherent signal processing unit.

The infrared signal generator is configured to generate an infrared signal, and the functions of the other devices are the same as those of the device in the ultrasonic generator example described above, and the examples are not described herein.

Because infrared has a strong directionality, it is easy to concentrate on a certain area, which is near the human ear. By propagating to the vicinity of our ears, directional propagation is achieved. Since the carrier signal is coherent, the modulated signal is easily interfered in the human ear region, so that the infrared signals cancel each other out, leaving only the sound signal. The function of demodulating the sound signal finally completes the directional propagation and restoration of the sound.

The above signal processing method will be described by realizing directional propagation of sound using an infrared signal as a carrier signal. When the directional propagation function is selected, the sound signal of the mobile terminal will be input to the DSP unit for processing, and the infrared generator is activated to generate a carrier signal, which is coherently processed, then modulated, and passed through a "pseudo speaker" that can be directionally propagated. Propagation, when the human ear receives the modulation signal, because of the principle of interference, the coherent infrared signals cancel each other out, and at the same time restore the original sound signal, completing the directional propagation. The specific implementation process is as shown in the flowchart of the method shown in FIG. 8, which specifically includes:

Step 401: The terminal receives a first operation instruction of the user, where the first operation instruction indicates to open a setting option of the terminal.

Step 402: The terminal receives a second operation instruction of the user, where the second operation instruction indicates that the function of the directed propagation is turned on.

Step 403: The terminal starts the infrared generator, acquires an infrared signal, and performs coherent processing on the infrared signal to generate a plurality of coherent infrared signals.

Specifically, if the user selects the function of directional propagation, the infrared generator needs to be activated, and an infrared signal is generated at the same time, and the generated infrared signal is coherently processed, and the infrared signal is converted into a multi-beam coherent infrared signal by coherent processing, coherent The infrared signal will be used as a carrier signal.

Step 404: The terminal acquires an audio signal, inputs the audio signal to the DSP unit, and processes the sound signal through the DSP unit to generate a sound signal that can be modulated.

Step 405: The terminal modulates the sound signal to the coherent infrared signal, and performs amplification processing on the modulated sound signal to obtain an output signal.

Step 406: The terminal outputs the output signal through a signal transmission hole.

Specifically, the modulated signal is transmitted through a “pseudo-speaker” that can realize directional propagation, that is, an output signal is output, and the output signal meets at the human ear, and interference occurs at the same time. Due to the interference phenomenon, the coherent infrared carrier signals cancel each other and restore. The original sound signal came out and the function of directional propagation was completed.

For the implementation of the steps 401 to 406, reference may be made to the steps of the foregoing ultrasonic signal as a carrier signal, which is not described herein again.

The signal processing method provided by the embodiment of the invention, when the directional propagation function is turned on, modulates the audio signal onto the coherent carrier signal to form an output signal for directional transmission. Since the carrier signal has strong and controllable directivity, the two At the intersection of the beams, a small range of sound-reducing regions can be formed. In this region, the modulation signal interferes. At this time, the carrier signal can be cancelled, and the original signal, that is, the audio signal, is left when the human ear is in this region. The sound can be heard, thereby realizing the directional transmission of the sound, reducing the sound diffusion, and avoiding the interference of the sound to nearby people; solving the problem that the mobile terminal transmits sound, because the sound is diffused seriously, and when the sound is transmitted, the individual cannot be Privacy issues and issues that interfere with nearby people.

The embodiment of the present invention provides a signal processing device 50. As shown in FIG. 9, the device 50 includes: an obtaining unit 501, a determining unit 502, and an output unit 503, where

The acquiring unit 501 is configured to: when the audio signal is acquired, the activation signal generator obtains a plurality of coherent carrier signals, wherein the carrier signals are signals having the same vibration direction, the same vibration frequency, and the same phase, or the vibration direction Signals that are identical and have the same vibration frequency and a constant phase difference;

The determining unit 502 is configured to determine an output signal according to the multi-beam coherent carrier signal and the audio signal to be modulated generated by the audio signal;

The output unit 503 is configured to output the signal through a signal output hole provided on the terminal output signal.

In an embodiment, as shown in FIG. 10, the apparatus further includes: a processing unit 504,

The acquiring unit 501 is configured to start the signal generator to acquire a carrier signal;

The processing unit 504 is configured to perform coherent processing on the carrier signal to generate a plurality of coherent carrier signals.

In an embodiment, the acquiring unit 501 is configured to activate an ultrasonic generator to acquire an ultrasonic signal, and the processing unit 504 is configured to perform coherent processing on the ultrasonic signal to generate a plurality of coherent ultrasonic signals.

Alternatively, the acquiring unit 501 is configured to activate a laser generator to acquire a laser signal, and the processing unit 504 is configured to coherently process the laser signal to generate a plurality of coherent laser signals;

Alternatively, the acquiring unit 501 is configured to activate an infrared generator to acquire an infrared signal, and the processing unit 504 is specifically configured to perform coherent processing on the infrared signal to generate a plurality of coherent infrared signals.

In an embodiment, the acquiring unit 501 is configured to modulate the to-be-modulated audio signal onto the multi-beam coherent carrier signal to obtain a modulated audio signal, and further configured to: The audio signal is amplified to obtain the output signal.

In an embodiment, as shown in FIG. 10, the apparatus further includes: a processing unit 504 configured to perform digital signal processing on the audio signal to generate an audio signal to be modulated.

For a detailed description of the signal processing apparatus provided by the embodiment of the present invention, reference may be made to the description of the foregoing signal processing method, and details are not described herein again.

The signal processing device provided by the embodiment of the invention modulates the audio signal onto the coherent carrier signal to form an output signal for directional transmission. Since the carrier signal has strong and controllable directivity, the intersection of the two beams can be formed. a small sound-reducing area in which the modulation signal interferes. At this time, the carrier signal can be cancelled, and the original signal, that is, the audio signal, is left, and the sound can be heard when the human ear is in this area. The directional transmission of the sound reduces the spread of sound and avoids the interference of the sound to nearby people.

The embodiment of the present invention provides a terminal 60. As shown in FIG. 11, the terminal 60 includes: a processor 601, a signal generator 602, a modulation circuit 603, and a signal transmission hole 604, wherein

The first processor 601 is configured to: when the audio signal is acquired, the activation signal generator 602 obtains a plurality of coherent carrier signals, wherein the carrier signals are signals having the same vibration direction, the same vibration frequency, and the same phase. Or a signal having the same vibration direction and the same vibration frequency and a constant phase difference;

The modulating circuit 603 is configured to determine an output signal according to the multi-beam coherent carrier signal and the audio signal to be modulated generated by the audio signal;

The signal transmission hole 604 is configured to output the output signal.

In an embodiment, the first processor 601 is configured to enable the signal generator 602 to acquire a carrier signal, perform coherent processing on the carrier signal, and generate a plurality of coherent carrier signals.

In an embodiment, the first processor 601 is configured to activate an ultrasonic generator, acquire an ultrasonic signal, perform coherent processing on the ultrasonic signal, and generate a plurality of coherent ultrasonic signals;

Alternatively, the first processor 601 is configured to start a laser generator, acquire a laser signal, perform coherent processing on the laser signal, and generate a plurality of coherent laser signals;

Alternatively, the first processor 601 is configured to activate an infrared generator, acquire an infrared signal, and perform coherent processing on the infrared signal to generate a plurality of coherent infrared signals.

In an embodiment, as shown in FIG. 12, the terminal further includes: an audio amplifier 605,

The modulating circuit 603 is configured to modulate the to-be-modulated audio signal onto the multi-beam coherent carrier signal to obtain a modulated audio signal;

The audio amplifier 605 is configured to perform amplification processing on the modulated audio signal to obtain the output signal.

In an embodiment, as shown in FIG. 12, the terminal 60 further includes a second processor 606 configured to perform digital signal processing on the audio signal to generate an audio signal to be modulated.

For a detailed description of the terminal provided by the embodiment of the present invention, reference may be made to the description of the foregoing signal processing method, and details are not described herein again.

The terminal provided by the embodiment of the present invention modulates an audio signal onto a coherent carrier signal to form an output signal for directional transmission. Since the carrier signal has strong and controllable directivity, the carrier signal has strong and controllable directivity. The intersection of the two beams can form a small range of harmonics. In this area, the modulation signal interferes. At this time, the carrier signal can be cancelled, and the original signal, that is, the audio signal, remains when the human ear is in this area. The sound can be heard, thereby realizing the directional transmission of the sound, reducing the spread of the sound, and avoiding the interference of the sound to nearby people.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Based on this, an embodiment of the present invention further provides a computer storage medium, in particular a computer readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the foregoing method are implemented.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Industrial applicability

According to the solution provided by the embodiment of the present invention, when the audio signal is acquired, the start signal generator obtains a plurality of coherent carrier signals, wherein the carrier signals are signals having the same vibration direction, the same vibration frequency, and the same phase, or the vibration direction. a signal having the same and the same vibration frequency and a constant phase difference; determining an output signal according to the multi-beam coherent carrier signal and the audio signal to be modulated generated by the audio signal; outputting the signal through a signal transmission hole provided on the terminal output signal. The audio signal is modulated onto the coherent carrier signal to form an output signal for directional transmission. Since the carrier signal has strong and controllable directivity, the intersection of the two beams can form a small sound-reducing region. In this area, the modulation signal interferes. At this time, the carrier signal can be cancelled, and the original signal, that is, the audio signal, is left. When the human ear is in this area, the sound can be heard, thereby realizing the directional transmission of the sound and reducing the sound diffusion. To avoid the interference of the sound to nearby people.

Claims

A signal processing method includes:

When acquiring the audio signal, the activation signal generator obtains a plurality of coherent carrier signals, which are signals having the same vibration direction, the same vibration frequency, and the same phase, or the same vibration direction and the same vibration frequency, and a signal with a constant phase difference;

Determining an output signal according to the multi-beam coherent carrier signal and the audio signal to be modulated generated by the audio signal;

The output signal is output through a signal transmission hole provided on the terminal.
The method of claim 1 wherein said enable signal generator obtains a plurality of coherent carrier signals, comprising:

The signal generator is activated to acquire a carrier signal, and the carrier signal is coherently processed to generate a plurality of coherent carrier signals.
The method according to claim 2, wherein said activating said signal generator, acquiring a carrier signal, performing coherent processing on said carrier signal to generate a plurality of coherent carrier signals, comprising:

Starting an ultrasonic generator, acquiring an ultrasonic signal, performing coherent processing on the ultrasonic signal to generate a plurality of coherent ultrasonic signals;

Or, starting a laser generator, acquiring a laser signal, performing coherent processing on the laser signal to generate a plurality of coherent laser signals;

Alternatively, the infrared generator is activated to obtain an infrared signal, and the infrared signal is coherently processed to generate a plurality of coherent infrared signals.
The method of claim 1, wherein the determining the output signal based on the plurality of coherent carrier signals and the to-be-modulated audio signal comprises:

Modulating the to-be-modulated audio signal onto the multi-beam coherent carrier signal to obtain a modulated audio signal;

The modulated audio signal is amplified to obtain the output signal.
The method of claim 1 wherein said plurality of coherent loads are The wave signal and the audio signal to be modulated generated by the audio signal, before determining the output signal, include:

Digital signal processing is performed on the audio signal to generate an audio signal to be modulated.
A signal processing device includes: an obtaining unit, a determining unit, and an output unit, wherein

The acquiring unit is configured to: when the audio signal is acquired, the activation signal generator obtains a plurality of coherent carrier signals, wherein the carrier signals are signals having the same vibration direction, the same vibration frequency, and the same phase, or the same vibration direction a signal having the same vibration frequency and a constant phase difference;

The determining unit is configured to determine an output signal according to the multi-beam coherent carrier signal and the audio signal to be modulated generated by the audio signal;

The output unit is configured to output the output signal through a signal output hole provided on the terminal.
The apparatus of claim 6 wherein said apparatus further comprises: a processing unit;

The acquiring unit is configured to start the signal generator to acquire a carrier signal;

The processing unit is configured to perform coherent processing on the carrier signal to generate a plurality of coherent carrier signals.
The apparatus according to claim 7, wherein

The acquiring unit is configured to activate an ultrasonic generator to acquire an ultrasonic signal, and the processing unit is configured to coherently process the ultrasonic signal to generate a plurality of coherent ultrasonic signals;

Or the acquiring unit is configured to start a laser generator to acquire a laser signal, and the processing unit is configured to coherently process the laser signal to generate a plurality of coherent laser signals;

Alternatively, the acquiring unit is configured to activate an infrared generator to acquire an infrared signal, and the processing unit is configured to perform coherent processing on the infrared signal to generate a plurality of coherent infrared signals.
The apparatus according to claim 6, wherein the obtaining unit is configured to modulate the to-be-modulated audio signal onto the plurality of coherent carrier signals to obtain a modulated audio signal; further configured to: The modulated audio signal is amplified to obtain the output signal.
The apparatus of claim 6, wherein the apparatus further comprises: a processing unit configured to digitally process the audio signal to generate an audio signal to be modulated.
A terminal includes: a first processor, a signal generator, a modulation circuit, and a signal transmission hole, wherein

The first processor is configured to: when acquiring an audio signal, the activation signal generator obtains a plurality of coherent carrier signals, wherein the carrier signals are signals having the same vibration direction, the same vibration frequency, and the same phase, or vibration a signal having the same direction, the same vibration frequency, and a constant phase difference;

The modulating circuit is configured to determine an output signal according to the multi-beam coherent carrier signal and the audio signal to be modulated generated by the audio signal;

The signal transmission hole is configured to output the output signal.
The terminal according to claim 11, wherein the first processor is configured to activate the signal generator, acquire a carrier signal, perform coherent processing on the carrier signal, and generate a plurality of coherent carrier signals.
The terminal according to claim 12, wherein

The first processor is configured to activate an ultrasonic generator, acquire an ultrasonic signal, perform coherent processing on the ultrasonic signal, and generate a plurality of coherent ultrasonic signals;

Alternatively, the first processor is configured to activate a laser generator, acquire a laser signal, perform coherent processing on the laser signal, and generate a plurality of coherent laser signals;

Alternatively, the first processor is configured to activate an infrared generator, acquire an infrared signal, and perform coherent processing on the infrared signal to generate a plurality of coherent infrared signals.
The terminal of claim 11, wherein the terminal further comprises: an audio amplifier,

The modulating circuit is configured to modulate the to-be-modulated audio signal onto the multi-beam coherent carrier signal to obtain a modulated audio signal;

The audio amplifier is configured to perform amplification processing on the modulated audio signal to obtain the output signal.
The terminal according to claim 11, wherein the terminal further comprises: a second process And configured to perform digital signal processing on the audio signal to generate an audio signal to be modulated.
A computer storage medium having stored thereon a computer program, the computer program being executed by a processor to perform the steps of the method of any one of claims 1 to 5.