CN111726728A

CN111726728A - Resonance suppression method and device

Info

Publication number: CN111726728A
Application number: CN202010617076.4A
Authority: CN
Inventors: 龚永燕
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-09-29

Abstract

The embodiment of the application discloses a resonance suppression method and a device, wherein the method comprises the following steps: acquiring audio to be played; determining a target frequency at which resonance occurs in the audio; suppressing the amplitude of the target frequency in the audio so that the amplitude of the target frequency meets a requirement; and playing the suppressed audio.

Description

Resonance suppression method and device

Technical Field

The embodiment of the application relates to electronic technology, and relates to, but is not limited to, a resonance suppression method and device.

Background

When the electronic equipment plays audio, resonance distortion noise generated by other components on the electronic equipment exists, and the resonance distortion noise needs to be suppressed when a user wants to obtain an ideal playing effect.

The solution of the related art is to design various cushions and isolation foams on the speaker module of the electronic device to reduce the energy transferred to the system. The problem of the first solution is that: the resonant energy transfer cannot be fundamentally solved and the cushion pad and the insulating foam bring about a significant cost increase.

The second solution of the related art is the design of speaker modules of the back-to-back unit for counteracting the reverse direction vibration energy when the speaker is working. The second solution has the following problems: the superposition of the speaker modules leads to a large increase in size, making the design unsuitable for use on ultra-thin notebook computers.

Disclosure of Invention

In view of the above, the embodiments of the present application provide a resonance suppression method and apparatus.

The technical scheme of the embodiment of the application is realized as follows:

in a first aspect, an embodiment of the present application provides a resonance suppression method, including:

acquiring audio to be played; determining a target frequency at which resonance occurs in the audio; suppressing the amplitude of the target frequency in the audio so that the amplitude of the target frequency meets a requirement; and playing the suppressed audio.

In a second aspect, embodiments of the present application provide a resonance suppression apparatus, the apparatus including:

the acquisition module is used for acquiring the audio to be played; a determining module for determining a target frequency at which resonance is generated in the audio frequency; the suppression module is used for suppressing the amplitude of the target frequency in the audio frequency so that the amplitude of the target frequency meets the requirement; and the playing module is used for playing the suppressed audio.

In a third aspect, an embodiment of the present application provides an electronic device, including a memory and a processor, where the memory stores a computer program that is executable on the processor, and the processor implements the steps in the method when executing the program.

In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps in the method.

According to the technical scheme provided by the embodiment of the application, firstly, audio to be played is obtained; then determining a target frequency for generating resonance in the audio frequency; then suppressing the amplitude of the target frequency in the audio frequency so that the amplitude of the target frequency meets the requirement; finally, playing the suppressed audio; therefore, the audio to be played is firstly suppressed to generate the resonant frequency and then played, so that the played audio and the resonant noise of the system can be greatly suppressed, and the method of the application is a software solution, so that more cost can not be spent on hardware and a space structure, and the light and thin design of a product can not be influenced.

Drawings

Fig. 1 is a schematic flowchart illustrating an implementation process of an audio resonance suppression method according to an embodiment of the present application;

fig. 2 is a schematic flow chart illustrating an implementation of another audio resonance suppression method according to an embodiment of the present application;

FIG. 3 is a diagram illustrating a relationship between a resonant frequency and a test time according to an embodiment of the present disclosure;

FIG. 4A is a diagram illustrating software and hardware layers of a resonance suppression system according to an embodiment of the present disclosure;

fig. 4B is a schematic flow chart illustrating an implementation of a resonance suppression method according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a resonance suppression apparatus provided in an embodiment of the present application;

fig. 6 is a schematic diagram of a hardware entity of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

It should be understood that some of the embodiments described herein are only for explaining the technical solutions of the present application, and are not intended to limit the technical scope of the present application.

Referring to fig. 1, an audio resonance suppression method according to an embodiment of the present application executes the following steps:

step 101, obtaining an audio to be played;

here, the audio to be played may be audio to be played by a notebook computer or other audio terminal.

Here, obtaining the audio to be played may be implemented by: the Audio Session is obtained through a Microsoft Audio Session Application Programming Interface (WASAPI). The WASAPI is an application program interface in a Universal Audio Architecture (UAA) introduced by microsoft corporation after a microsoft Windows (Windows Vista) system, and servers corresponding to application programs installed in a live broadcast terminal can respectively call the WASAPI to acquire a required audio.

It should be noted that, when multiple applications exist in the live broadcast terminal to play audio respectively, the WASAPI may collect the audio played by the multiple applications. Therefore, the server can acquire the audio played by the live terminal itself, that is, all the audio played by the live terminal, through the wasps.

Step 102, determining a target frequency for generating resonance in the audio frequency;

resonance refers to the situation where a physical system must vibrate at a specific frequency with a larger amplitude than other frequencies; these specific frequencies are referred to as resonant frequencies. Resonance is also called "resonance" in acoustics, and refers to the phenomenon that an object sounds due to resonance, for example, two tuning forks with the same frequency are close to each other, and when one vibrates to sound, the other also sounds. Generally, a system (whether mechanical, acoustic or electronic) has multiple resonant frequencies, and it is easier to vibrate at these frequencies and more difficult to vibrate at other frequencies.

Here, the target frequency is a frequency at which the audio to be played and other components of the audio playing apparatus are likely to resonate. For example: when the device for playing audio is a notebook computer, the keyboard, the bottom case, and the touch pad of the notebook computer may resonate with the audio to be played. What needs to be determined is then the target frequency at which resonance with these components occurs.

Step 103, suppressing the amplitude of the target frequency in the audio frequency so that the amplitude of the target frequency meets the requirement;

after the target frequency is determined, via step 102, the amplitude of the target frequency in the audio to be played needs to be suppressed. Here, the frequency refers to how fast an object vibrates (high frequency, high pitch, or sharp sound); the loudness is related to the amplitude of sound generated by an object, namely the amplitude of vibration of the object (large amplitude and large loudness). By suppressing the amplitude of the target frequency, the amplitude of the target frequency is made to meet the requirement. Thus, the amplitude of the target frequency is reduced.

And step 104, playing the suppressed audio.

When the audio frequency with the reduced target frequency amplitude resonates with other parts of the playing audio equipment during playing, the resonant noise is also reduced.

According to the embodiment of the application, firstly, audio to be played is obtained; then determining a target frequency for generating resonance in the audio frequency; then suppressing the amplitude of the target frequency in the audio frequency so that the amplitude of the target frequency meets the requirement; finally, playing the suppressed audio; therefore, the audio to be played is firstly suppressed to generate the resonant frequency and then played, so that the played audio and the resonant noise of the system can be greatly suppressed, and the method of the application is a software solution, so that more cost can not be spent on hardware and a space structure, and the light and thin design of a product can not be influenced.

Referring to fig. 2, the method for suppressing audio resonance provided in the embodiment of the present application executes the following steps:

step 201, acquiring an audio to be played;

step 202, obtaining a resonance frequency recording table, wherein the resonance frequency recording table is used for recording frequencies which are easy to generate resonance;

here, the resonance frequency recording table is stored in the device for playing audio, and is used for recording the frequency which is easy to generate resonance when the device plays audio.

Step 203, determining the frequency in the audio to be played, which is the same as the frequency in the resonance frequency recording table, as a target frequency;

the method for determining the target frequency in the audio to be played comprises the following steps: and determining the frequency in the audio to be played, which is the same as the frequency in the resonance frequency record table, as a target frequency by comparing the frequency in the audio to be played with the frequency in the resonance frequency record table.

Step 204, determining a target amplitude corresponding to the target frequency from the resonance frequency record table;

the resonant frequency recording table records the frequency and corresponding amplitude which are easy to generate resonance. And determining the target amplitude corresponding to the target frequency according to the amplitude corresponding to the frequency which is the same as the target frequency in the resonance frequency recording table.

Step 205, suppressing the amplitude of the target frequency in the audio to be played according to the target amplitude, so that the amplitude of the target frequency meets the requirement;

and after the target amplitude corresponding to the target frequency is obtained, the amplitude of the target frequency is enabled to meet the requirement by restraining the amplitude of the target frequency.

And step 206, playing the suppressed audio.

According to the method and the device, the target frequency and the amplitude corresponding to the target frequency are determined according to the resonance frequency recording table, so that the resonance frequency recording table is used for restraining the frequency which can generate resonance in the audio to be played, the target frequency can be selected efficiently and accurately, and the effect that the amplitude corresponding to the target frequency is restrained accurately so that the amplitude of the target frequency meets the requirement can be achieved.

Fig. 3 is a schematic diagram of a relationship between a resonance frequency and a test time according to an embodiment of the present application, where as shown in a diagram a in fig. 3, an axis of abscissa is the test time, and an axis of ordinate is the resonance frequency. As can be seen from the graph a in fig. 3, the harmonic distortion signal of 5kHz or more is not detected, and thus, it can be considered that the resonance does not occur in the case of the graph a in fig. 3. Fig. 3B is a schematic diagram of another relationship between the resonance frequency and the test time provided in the embodiment of the present application, and as shown in fig. 3B, the axis of abscissa is the test time and the axis of ordinate is the resonance frequency. It can be seen from the B diagram in fig. 3 that the harmonic distortion signal 301 above 5kHz is obviously present, so that it can be determined that the B diagram in fig. 3 is the case where resonance exists. Fig. 3C is a schematic diagram of another relationship between the resonance frequency and the test time provided in the embodiment of the present application, and as shown in fig. 3C, the axis of abscissa is the test time and the axis of ordinate is the resonance frequency. It can be seen from the graph C in fig. 3 that there is the harmonic distortion signal 302 above 5kHz, which is not obvious from the graph B in fig. 3, so that if the distortion signal energy of the collected resonance noise occupies more than 1% of the total playing signal energy, it is also determined that the situation of the graph C in fig. 3 is resonant.

The method for creating the resonant frequency record table provided by the embodiment of the application executes the following steps:

step 301, acquiring a first original audio and a corresponding collected audio, wherein the collected audio is an audio collected when the first original audio is played;

here, the first original audio may be obtained through a standard interface WASAPI in the microsoft operating system;

the microphone may be used to detect the sound played and the sound that the system may make, i.e., to capture the captured audio.

Step 302, when a distortion frequency exists in the acquired audio, acquiring a frequency to be suppressed and a corresponding amplitude in the first original audio, wherein the distortion frequency is a frequency generated by audio resonance between the first original audio and other parts in the electronic device;

the determination of the distortion frequency of the acquired audio may refer to the schematic diagrams of the relationship between the resonance frequency obtained by the acquisition and the test time shown in fig. 3A, 3B and 3C. From the case shown in fig. 3A, it can be determined that the first original audio is not resonant with other parts in the electronic device, i.e., there is no distortion frequency; from the cases described in fig. 3B and 3C, it can be determined that the first original audio is in resonance with other parts of the electronic device, i.e., there is a distorted frequency in the captured audio.

And when the acquired audio is determined to have distortion frequency, acquiring the frequency to be suppressed and the corresponding amplitude in the first original audio.

Step 303, suppressing the amplitude of the frequency to be suppressed in the first original audio by a specific threshold gain;

here, a specific threshold gain may be defined in advance, and the amplitude of the frequency to be suppressed in the first original audio is suppressed using the specific threshold gain.

Step 304, recording the result after inhibition, wherein the result after inhibition is used for indicating whether the inhibition meets the requirement;

the results after suppression can be recorded in a manner similar to fig. 3A. According to the suppression method, the suppression requirement is met until the acquired distortion signal energy of the resonance noise accounts for less than 1% of the total playing signal energy.

And 305, recording the suppressed result and the corresponding suppressed amplitude in the resonance frequency recording table.

Here, the corresponding suppressed amplitude refers to a suppressed amplitude corresponding to the frequency to be suppressed.

The embodiment of the application provides a method for creating a resonance frequency record table, which is used for suppressing the amplitude of the frequency to be suppressed in the first original audio by using a specific threshold gain to obtain a distortion resonance meeting requirements, and recording the suppressed amplitude corresponding to the frequency to be suppressed in the resonance frequency record table. Thus, when playing audio containing the same frequency to be suppressed, the amplitude to be suppressed can be determined according to the resonance frequency recording table.

Another method for creating a resonant frequency record table provided in an embodiment of the present application performs the following steps:

step 311, acquiring a first original audio and a corresponding collected audio, wherein the collected audio is an audio collected when the first original audio is played;

step 312, when the acquired audio has a distortion frequency, determining a frequency, which is obtained by rounding after the distortion frequency is 1/P, as a frequency to be suppressed in the first original audio, where P is an integer greater than or equal to 1;

here, since the audio frequency liable to generate resonance may have a multiple relationship in frequency with the distortion frequency, and the distortion frequency is generally a high-frequency signal, the frequency rounded after the distortion frequency takes 1/P may be determined as the frequency to be suppressed in the first original audio frequency.

Step 313, in the first original audio, obtaining a corresponding amplitude according to the frequency to be suppressed;

and after the frequency to be suppressed is obtained, obtaining the corresponding amplitude according to the frequency to be suppressed.

Step 314, suppressing the amplitude of the frequency to be suppressed in the first original audio by a specific threshold gain;

step 315, recording the result after inhibition, wherein the result after inhibition is used for indicating whether the inhibition meets the requirement;

and step 316, recording the suppressed result and the corresponding suppressed amplitude in the resonance frequency recording table.

In the embodiment of the application, the frequency to be suppressed is determined by taking the distortion frequency as 1/P and then rounding the distortion frequency to be determined as the frequency to be suppressed, and the frequency to be suppressed is determined by using the method to achieve the effects of high efficiency and accuracy.

The embodiment of the application provides a method for creating a resonance frequency record table, which comprises the following steps:

step 321, acquiring a first original audio and a corresponding collected audio, wherein the collected audio is an audio collected when the first original audio is played;

step 322, comparing the first original audio and the collected audio to obtain a comparison result;

here, the played first original audio and the collected audio collected by the microphone are compared to obtain a comparison result.

Step 323, when the acquired audio has the distortion frequency according to the comparison result, determining the frequency to be suppressed and the corresponding amplitude in the first original audio.

And when the existence of distortion frequency caused by system resonance noise is confirmed according to the comparison result, determining the frequency to be suppressed and the corresponding amplitude in the first original audio.

Step 324, when the first original audio includes N to-be-suppressed frequencies, obtaining an amplitude corresponding to each to-be-suppressed frequency, where N is an integer greater than or equal to 1;

here, there is a case where N frequencies to be suppressed are also included in the first original audio, for example, the first original audio includes frequencies to be suppressed f1, f2, f3, and f4, which correspond to amplitudes H1, H2, H3, and H4, respectively.

Step 325, sorting the N amplitudes from large to small to obtain a sorting result;

for example: the first original audio comprises frequencies f1, f2, f3 and f4 to be suppressed, corresponding to the amplitudes H1, H2, H3 and H4 respectively, and the frequencies H1, H2, H3 and H4 are sorted from large to small: h4> H3> H2> H1.

Step 326, taking the frequencies to be suppressed corresponding to the first M amplitudes from the sorting result, and suppressing the amplitudes of the M frequencies to be suppressed by the threshold gain, wherein M is an integer less than or equal to N;

for example: the amplitudes of f3 and f4 can be suppressed with a threshold gain according to the sorting result of the corresponding amplitudes, which can be taken as H3 and H4, and the corresponding frequencies f3 and f4 to be suppressed.

Step 327, recording a result after the inhibition, wherein the result after the inhibition is used for indicating whether the inhibition meets the requirement;

and 328, recording the suppressed result and the corresponding suppressed amplitude in the resonance frequency recording table.

According to the embodiment of the application, when a resonance frequency record table is created, firstly, a comparison result is obtained by comparing a first original audio frequency and a collected audio frequency, secondly, when a distortion frequency is determined to exist according to the comparison result, a frequency to be suppressed and a corresponding amplitude are determined, a frequency with a large amplitude value is selected as a frequency to be suppressed when the frequency to be suppressed is determined to be suppressed, and then, suppression is performed on each frequency to be suppressed. Therefore, the existence of the distortion frequency is determined by comparing the first original audio and the collected audio, so that the interference audio added to the collected audio and played after the first original audio passes through the audio playing system can be accurately obtained, and the interference audio comprises the distortion audio; the amplitudes of the audio to be suppressed are sequenced, the audio with large amplitude is selected to be suppressed first, and the audio amplitude suppression can be efficiently completed to obtain a suppression result meeting the requirement.

step 331, acquiring a first original audio and a corresponding acquired audio, wherein the acquired audio is an audio acquired when the first original audio is played;

step 332, when the acquired audio has a distortion frequency, acquiring a second original audio, wherein the second original audio and the first original audio have at least one same frequency to be suppressed;

the second original audio may be different audio than the first original audio, but needs to contain at least one frequency to be suppressed that is the same as the first original audio. The second original audio may also be audio of the same frequency as the first original audio.

Step 333, suppressing the amplitude corresponding to the frequency to be suppressed by using a specific threshold gain;

here, the specific threshold gain may be set in advance, for example, the threshold gain may be set to-3 dB. If the threshold gain is set to-3 dB, the amplitude corresponding to the frequency to be suppressed can be reduced by half.

Step 334, recording a result after inhibition, wherein the result after inhibition is used for indicating whether the inhibition meets the requirement; the results after suppression can be recorded in a manner similar to fig. 3A. According to the suppression method, the suppression requirement is met when the acquired distortion signal energy of the resonance noise accounts for less than 1% of the total playing signal energy.

And step 335, recording the result after the suppression and the corresponding amplitude after the suppression in the resonance frequency recording table.

According to the embodiment of the application, when the distortion frequency exists in the collected audio, the second original audio which at least has the same frequency to be suppressed as the first original audio can be obtained to be played, so that the amplitude corresponding to the frequency to be suppressed mixed in different original audios can be suppressed, the suppression process can be repeated, and the suppression is more suitable for the situation that the audio to be suppressed exists in different original audios in the practical application scene.

Here, the method of the previous embodiment can be used at both the factory side and the user side, and if at the factory side, the frequency to be suppressed can be suppressed repeatedly until the requirement is satisfied, and as the function of the steps 303, 314 and 333 of the previous embodiment, the following steps can be used instead: suppressing the amplitude of the frequency to be suppressed in the first original audio by using a specific threshold gain to obtain a first suppressed audio; when the amplitude of the distortion frequency in the collected first suppressed audio does not meet the requirement, suppressing the amplitude of the frequency to be suppressed in the first original audio to obtain a second suppressed audio; when the amplitude of the distortion frequency in the collected second suppression audio meets the requirement, suppressing the amplitude corresponding to the frequency to be suppressed by using a specific threshold gain to obtain a third suppression audio; playing the third suppressed audio, and collecting the amplitude of the distortion frequency in the third suppressed audio; when the amplitude of the distortion frequency in the acquired third suppressed audio meets the requirement, recording the frequency to be suppressed and the corresponding amplitude corresponding to the third suppressed audio in the resonance frequency recording table; when the amplitude of the distortion frequency in the acquired third suppressed audio does not meet the requirement, suppressing the amplitude of the frequency to be suppressed in the third suppressed audio by using the threshold gain to obtain a fourth suppressed audio; and when the amplitude of the distortion frequency in the acquired fourth suppressed audio meets the requirement, recording the frequency to be suppressed and the corresponding amplitude corresponding to the fourth suppressed audio in the resonance frequency recording table.

If the user side is available, the amplitude corresponding to the frequency to be suppressed can be suppressed when the user plays the original file each time.

With the design of the notebook computer being light and thin, the strength and stability of each part of the notebook computer become weaker and weaker, and the vibration energy brought by the sound system becomes larger and larger. The quality of the notebook sound is more and more demanding for users, resulting in more and more resonant noise of the notebook computer system being complained by users.

The application provides sound information when a microphone detects system plays sound. When the resonance information is detected, the related sound frequency signals which are easy to generate system resonance noise are suppressed. The parameters of the sound signal generating resonance, such as frequency/amplitude, are stored, and in the process of repeatedly detecting the ground, the played signal is safer, the probability of resonance is smaller and smaller, and the detection time of the microphone is reduced continuously.

Fig. 4A is a schematic diagram of software layers and hardware layers of a resonance suppression system according to an embodiment of the present application, and as shown in fig. 4A, the software layer 41 includes an operating system 411, which represents an operating system of the resonance suppression system; an audio processing object 412 representing original audio that needs to be audio processed; the intelligent de-buzzing algorithm 413 is used for finishing detection of the audio to be suppressed in the original audio and suppression of the corresponding amplitude of the audio to be suppressed; a driver 414 for notifying execution of the de-buzzing algorithm and communicating the recorded raw audio and the played audio to the smart de-buzzing algorithm. The hardware layer 42 includes an Intel chipset/platform 421 for recording raw audio signals; an audio codec (sound card) 422 for encoding and decoding an original audio signal; the audio power amplifier 423 is used for amplifying the coded and decoded audio signals; a speaker 424 for playing out the amplified audio signal; a microphone 425 for recording the played collected audio signal; noise 427 is included in the captured audio signal, and noise 427 may come from keyboard 426, laptop C and D surfaces 428, and touchpad 429.

Fig. 4B is a schematic diagram of an implementation flow of a resonance suppression method provided in the embodiment of the present application, and as shown in fig. 4B, a work flow is described as follows:

step S400, start;

step S401, the system informs the sound card to play the audio file;

as shown in fig. 4A, when the speaker 424 of the notebook computer starts playing the audio file, the microphone 425 starts detecting the first original audio signal being played and the audio signal being played externally.

S402, driving an intelligent de-buzzing algorithm to run;

as shown in the software layer 41 of fig. 4A, the driver 414 notifies the intelligent de-beep algorithm 413 to run.

S403, detecting and analyzing a playing signal by an intelligent de-buzzing algorithm;

the intelligent de-buzzing algorithm acquires a played first original audio signal and an externally played audio signal; when the notebook computer sound system starts playing the first original sound signal, the intelligent de-buzzing algorithm starts to detect the played sound and the sound possibly emitted by the system.

And acquiring an externally played audio signal recorded by a microphone, and comparing the played first original audio signal with the externally played audio signal by using a Smart De-buzzer (Smart De-buzzer) algorithm. Here, the externally played audio signal is a mixed signal of the first original audio signal and sound that may be emitted by the system. As shown in FIG. 4A, the keyboard 426, the C and D sides 428 of the notebook, and the touchpad 429 may all emit noise.

S404, analyzing a signal model to determine whether risks exist;

analyzing the acquired first original audio signal and an externally played audio signal according to the distortion signal model, and determining whether the first original audio signal contains a dangerous signal;

here, the distorted audio signal model is obtained in advance, and the distorted audio signal model includes information of the first original audio signal that may cause distortion, for example: the frequency and amplitude of the audio signal, etc. The method comprises the steps of pre-judging an acquired first original audio signal and an externally played audio signal according to a distorted audio signal model, and determining whether the first original audio signal contains a dangerous audio signal which is possible to generate a distorted audio signal.

S405, informing a microphone to record by an intelligent de-buzzing algorithm;

when the first original audio signal contains a dangerous audio signal, the intelligent de-buzzing algorithm informs the microphone to detect the first original audio signal and an externally played audio signal; all external sound signals recorded by the microphone are acquired, wherein the external sound signals comprise a first original audio signal played, signals generated by other parts of the notebook computer, external other interference signals and the like, and distortion signals generated among the signals. Here, there are two kinds of distortion signals: one is a mixed signal generated by mixing, and the other is a higher harmonic signal of the self.

When the first original audio signal is judged to contain the dangerous audio signal in advance, the intelligent de-buzzing algorithm is needed to be used for detecting the first original audio signal and the audio signal played externally. Here, the detection as shown in fig. 4A refers to the smart de-buzzing algorithm system calling the first original audio signal played by the speaker 424 and the microphone 425 recording the audio signal played externally.

Step S406, driving to transmit the recording signal to an intelligent de-buzzing algorithm;

the microphone algorithm system internally calls the first original audio signal played by the speaker and the audio signal played by the microphone and recorded by the microphone, and as shown in fig. 4A, the driver 414 transmits the recorded first original audio signal and the audio signal played by the microphone to the intelligent de-buzzing algorithm 413.

Step S407, determining whether a resonance signal is generated;

the intelligent de-buzzing algorithm determines whether to generate a distorted audio signal according to the played first original audio signal and an externally played audio signal recorded by a microphone;

the intelligent de-buzzing algorithm can determine whether a distorted signal is caused by system resonance noise or not through processing according to the recorded first original audio signal and the audio signal played externally.

Step S408, recording a signal, and setting a limit gain;

when a distorted signal is detected, the intelligent de-buzzing algorithm can extract a played first original audio signal and record frequency information and amplitude information of the first original audio signal and frequency information and amplitude information of the distorted audio signal; meanwhile, the intelligent de-buzzing algorithm sets a limit gain, that is, the set gain is used for suppressing the amplitude corresponding to the frequency to be suppressed. The ultimate gain mentioned in the above embodiments is a specific threshold gain, for example, the ultimate gain may be-3 dB.

When the intelligent De-buzzing algorithm detects a distorted signal caused by system resonance noise, the Smart De-buzzer algorithm acquires a played first original audio signal and records the frequency and amplitude of the first original audio signal and the frequency and amplitude of the distorted signal.

It is desirable that in practice not all frequency information of the first original audio signal may be recorded, but only the frequencies and corresponding amplitudes causing the distortion signal.

The key to this is that there is a black list (a pre-set table of frequencies to be suppressed) with all frequencies causing distortion (dangerous frequencies). When the first original audio signal is known, the spectral range of the first original audio signal is known, and all dangerous frequencies are found in the spectral range; the amplitudes corresponding to all dangerous frequencies are found on the first original audio signal.

Step S409, setting the limit gain of the audio processing object post-processing;

when the same first original audio signal or a second original audio signal containing the same frequency to be suppressed is played again, the intelligent de-buzzing algorithm suppresses the audio signal by the set gain value and then plays the audio signal for the loudspeaker again. The ultimate gain here may also be referred to as a specific threshold gain as in the foregoing embodiments, for example, the post-processing ultimate gain may be-3 dB.

And detecting and comparing the resonance noise signal again after the audio signal is recorded again until the distortion signal energy of the resonance noise is controlled below 1% of the total energy of the playing signal. And locking the frequency and amplitude of the first original audio signal or the second original audio signal, and directly playing the original audio signal of the frequency with the amplitude recorded last when playing again next time.

When the same second original audio signal is played again (for verifying the dangerous frequency of the first original audio signal, steps S401 to S408 may be regarded as a process of predicting the dangerous frequency in the first original audio signal), the Smart De-buzzer algorithm suppresses the dangerous frequency in the second original audio signal by a-3 dB gain value, and then plays the same signal to the Speaker again.

Here, the second original audio signal also includes a plurality of dangerous frequencies that are the same as those in the first original audio signal; for example, the first original audio signal includes f1, f2, f3 and f4, corresponding to amplitudes H1, H2, H3 and H4, respectively; the second original audio signal comprises f1, f3 and f4, corresponding to amplitudes of H5, H6 and H7, respectively; wherein, H6> H5> H7;

wherein the algorithm suppresses the dangerous frequencies in the second original audio signal with a-3 dB gain value, comprising: the algorithm sorts the amplitude values of the same danger frequencies (the second original audio signal includes f1, f3 and f4), and selects a danger frequency with a large amplitude value as a target danger frequency to be suppressed (for example, the target danger frequencies are f3 and f 1); then, the target dangerous frequency is suppressed, and the target dangerous frequency is played again after being suppressed.

And after the microphone records all external sound signals again, detecting and comparing the amplitude of the resonance noise signal again until the distortion signal capability of the resonance noise is controlled to be less than 1% of the total energy. And locking the frequency and amplitude of the dangerous signals in the playing signal. When playing again next time, the frequency signal is played directly with the amplitude recorded last.

Step S410, ending;

here, the Smart De-buzzer algorithm classifies the played sound signals, and performs more microphone detection and adjustment on single-frequency signal sounds which are easy to generate piano tones and have more concentrated energy.

The classification here is a simple classification, i.e., a judgment as to whether it is a single frequency or a combination of simple several frequencies in which energy is relatively concentrated.

The embodiment of the application provides an intelligent de-buzzing algorithm to suppress to-be-suppressed frequency signals in original audio frequency which can generate resonance. Thus, the advantages after the scheme is adopted are as follows: firstly, the system resonance noise is controlled to the utmost extent; secondly, the software solution is used, the design of hardware and a space structure is not influenced, and the light and thin design requirement of a product is met.

Based on the foregoing embodiments, the present application provides a resonance suppression apparatus, which includes modules and sub-modules included in the modules, and can be implemented by a processor in an electronic device; of course, the implementation can also be realized through a specific logic circuit; in implementation, the processor may be a Central Processing Unit (CPU), a Microprocessor (MPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or the like.

Fig. 5 is a schematic structural diagram of a resonance suppression apparatus provided in an embodiment of the present application, and as shown in fig. 5, the resonance suppression apparatus 500 includes an obtaining module 501, a determining module 502, a suppressing module 503, and a playing module 504, where:

an obtaining module 501, configured to obtain an audio to be played;

a determining module 502 for determining a target frequency for generating resonance in the audio frequency;

a suppressing module 503, configured to suppress the amplitude of the target frequency in the audio so that the amplitude of the target frequency meets a requirement;

and a playing module 504, configured to play the suppressed audio.

In some embodiments, the determining module 502 includes a first obtaining sub-module and a first determining sub-module, wherein the first obtaining sub-module is configured to obtain a resonance frequency record table, wherein the resonance frequency record table is configured to record frequencies susceptible to resonance; and the first determining submodule is used for determining the frequency which is the same as the frequency in the resonance frequency recording table in the audio to be played as a target frequency.

In some embodiments, the suppression module 503 includes a second determination submodule and a first suppression submodule, wherein the second determination submodule is configured to determine a target amplitude corresponding to the target frequency from the resonant frequency record table; and the first suppression submodule is used for suppressing the amplitude of the target frequency in the audio to be played according to the target amplitude so as to enable the amplitude of the target frequency to meet the requirement.

In some embodiments, the resonance suppression apparatus further includes a creating module, configured to create a resonance record table, where the creating module includes a second obtaining sub-module, a third obtaining sub-module, a second suppression sub-module, a first recording sub-module, and a second recording sub-module, where the second obtaining sub-module is configured to obtain a first original audio and a corresponding captured audio, where the captured audio is an audio captured when the first original audio is played; the third obtaining submodule is used for obtaining the frequency to be suppressed and the corresponding amplitude in the first original audio when the collected audio has distortion frequency, wherein the distortion frequency is the frequency generated by audio resonance of the first original audio and other parts in the electronic equipment; the second suppression submodule is used for suppressing the amplitude of the frequency to be suppressed in the first original audio by a specific threshold gain; the first recording submodule is used for recording the result after inhibition, and the result after inhibition is used for indicating whether the inhibition meets the requirement or not; and the second recording submodule is used for recording the suppressed result and the corresponding suppressed amplitude in the resonant frequency recording table.

In some embodiments, the third obtaining submodule includes a rounding unit and an obtaining unit, where the rounding unit is configured to, when a distortion frequency exists in the collected audio, determine a frequency that is rounded after the distortion frequency is 1/P, as a frequency to be suppressed in the first original audio, where P is an integer greater than or equal to 1; the obtaining unit is used for obtaining corresponding amplitude in the first original audio according to the frequency to be suppressed.

In some embodiments, the third obtaining sub-module includes a comparing unit and a determining unit, wherein the comparing unit is configured to compare the first original audio and the collected audio to obtain a comparison result; the determining unit is used for determining the frequency to be suppressed and the corresponding amplitude in the first original audio when the acquired audio is determined to have the distortion frequency according to the comparison result.

In some embodiments, the second suppression submodule includes an obtaining unit, a sorting unit, and a suppression unit, where the obtaining unit is configured to obtain, when the first original audio includes N to-be-suppressed frequencies, an amplitude corresponding to each to-be-suppressed frequency, where N is an integer greater than or equal to 1; the sorting unit is used for sorting the N amplitudes from large to small to obtain a sorting result; the suppression unit is configured to obtain the to-be-suppressed frequencies corresponding to the first M amplitudes from the sorting result, and suppress the amplitudes of the M to-be-suppressed frequencies by the threshold gain, where M is an integer less than or equal to N.

In some embodiments, the creating module includes a fourth obtaining sub-module for obtaining a second original audio when the captured audio has a distorted frequency, wherein the second original audio has at least one same frequency to be suppressed as the first original audio.

The above description of the apparatus embodiments, similar to the above description of the method embodiments, has similar beneficial effects as the method embodiments. For technical details not disclosed in the embodiments of the apparatus of the present application, reference is made to the description of the embodiments of the method of the present application for understanding.

In the embodiment of the present application, if the resonance suppression method is implemented in the form of a software functional module and sold or used as a standalone product, the resonance suppression method may be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially implemented or a part contributing to the related art may be embodied in the form of a software product stored in a storage medium, and including a plurality of instructions for enabling an electronic device (which may be a mobile phone, a tablet computer, a desktop computer, a personal digital assistant, a navigator, a digital phone, a video phone, a television, a sensing device, etc.) to execute all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the present application are not limited to any specific combination of hardware and software.

Correspondingly, an embodiment of the present application provides an electronic device, fig. 6 is a schematic diagram of a hardware entity of the electronic device according to the embodiment of the present application, and as shown in fig. 6, the hardware entity of the electronic device 600 includes: comprising a memory 601 and a processor 602, said memory 601 storing a computer program operable on the processor 602, said processor 602 implementing the steps in the resonance suppression method provided in the above described embodiments when executing said program.

The memory 601 is configured to store instructions and applications executable by the processor 602, and may also buffer data (e.g., image data, audio data, voice communication data, and video communication data) to be processed or already processed by the processor 602 and modules in the electronic device 600, and may be implemented by a FLASH memory (FLASH) or a Random Access Memory (RAM).

Accordingly, embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps in the resonance suppression method provided in the above embodiments.

Here, it should be noted that: the above description of the storage medium and device embodiments is similar to the description of the method embodiments above, with similar advantageous effects as the method embodiments. For technical details not disclosed in the embodiments of the storage medium and apparatus of the present application, reference is made to the description of the embodiments of the method of the present application for understanding.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.

Alternatively, the integrated units described above in the present application may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present application may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for enabling an electronic device (which may be a mobile phone, a tablet computer, a notebook computer, a desktop computer, a robot, a drone, or the like) to execute all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a removable storage device, a ROM, a magnetic or optical disk, or other various media that can store program code.

The methods disclosed in the several method embodiments provided in the present application may be combined arbitrarily without conflict to obtain new method embodiments. Features disclosed in several of the product embodiments provided in the present application may be combined in any combination to yield new product embodiments without conflict. The features disclosed in the several method or apparatus embodiments provided in the present application may be combined arbitrarily, without conflict, to arrive at new method embodiments or apparatus embodiments.

The above description is only for the embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of resonance suppression, the method comprising:

acquiring audio to be played;

determining a target frequency at which resonance occurs in the audio;

suppressing the amplitude of the target frequency in the audio so that the amplitude of the target frequency meets a requirement;

and playing the suppressed audio.

2. The method of claim 1, wherein the determining a target frequency at which resonance occurs in the audio comprises:

acquiring a resonance frequency recording table, wherein the resonance frequency recording table is used for recording the frequency which is easy to generate resonance;

and determining the frequency in the audio to be played, which is the same as the frequency in the resonance frequency recording table, as a target frequency.

3. The method of claim 2, wherein the resonance frequency record table is used to record frequencies and corresponding amplitudes that are susceptible to resonance;

the suppressing the amplitude of the target frequency in the audio so that the amplitude of the target frequency meets a requirement comprises:

determining a target amplitude corresponding to the target frequency from the resonance frequency record table;

and suppressing the amplitude of the target frequency in the audio to be played according to the target amplitude so as to enable the amplitude of the target frequency to meet the requirement.

4. The method of claim 2, wherein creating the table of resonance frequencies comprises:

acquiring a first original audio and a corresponding collected audio, wherein the collected audio is an audio collected when the first original audio is played;

when the acquired audio has distortion frequency, acquiring the frequency to be suppressed and the corresponding amplitude in the first original audio, wherein the distortion frequency is the frequency generated by audio resonance of the first original audio and other parts in the electronic equipment;

suppressing the amplitude of the frequency to be suppressed in the first original audio by a specific threshold gain;

recording the result after the inhibition, wherein the result after the inhibition is used for indicating whether the inhibition meets the requirement or not;

and recording the result after the suppression and the corresponding amplitude after the suppression in the resonance frequency recording table.

5. The method of claim 4, wherein the obtaining the frequencies to be suppressed and the corresponding amplitudes in the first original audio when the captured audio has distorted frequencies comprises:

when the acquired audio has distortion frequency, determining the frequency which is rounded after the distortion frequency is 1/P as the frequency to be suppressed in the first original audio, wherein P is an integer which is more than or equal to 1;

and in the first original audio, acquiring corresponding amplitude according to the frequency to be suppressed.

6. The method of claim 4, wherein the obtaining a frequency to be suppressed and a corresponding amplitude in the first original audio when the captured audio has a distorted frequency comprises:

comparing the first original audio with the collected audio to obtain a comparison result;

and when the acquired audio has the distortion frequency according to the comparison result, determining the frequency to be suppressed and the corresponding amplitude in the first original audio.

7. The method of claim 4, wherein said suppressing the amplitude of the frequency to be suppressed in the first original audio by a particular threshold gain comprises:

when the first original audio comprises N frequencies to be suppressed, acquiring the amplitude corresponding to each frequency to be suppressed, wherein N is an integer greater than or equal to 1;

sequencing the N amplitudes from large to small to obtain a sequencing result;

and taking the frequencies to be suppressed corresponding to the first M amplitudes from the sequencing result, and suppressing the amplitudes of the M frequencies to be suppressed by using the threshold gain, wherein M is an integer less than or equal to N.

8. The method of claim 2, wherein creating the table of resonance frequencies comprises:

when the acquired audio has distortion frequency, acquiring a second original audio, wherein the second original audio and the first original audio at least have one same frequency to be suppressed;

suppressing the amplitude corresponding to the frequency to be suppressed by using a specific threshold gain;

9. A resonance suppression apparatus, the apparatus comprising:

the acquisition module is used for acquiring the audio to be played;

a determining module for determining a target frequency at which resonance is generated in the audio frequency;

the suppression module is used for suppressing the amplitude of the target frequency in the audio frequency so that the amplitude of the target frequency meets the requirement;

and the playing module is used for playing the suppressed audio.

10. The apparatus of claim 9, wherein the means for determining comprises:

the device comprises an acquisition unit, a storage unit and a processing unit, wherein the acquisition unit is used for acquiring a resonance frequency recording table, and the resonance frequency recording table is used for recording the frequency which is easy to generate resonance;

and the determining unit is used for determining the frequency in the audio to be played, which is the same as the frequency in the resonance frequency recording table, as the target frequency.