CN108804072A - Audio-frequency processing method, device, storage medium and terminal - Google Patents
Audio-frequency processing method, device, storage medium and terminal Download PDFInfo
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Abstract
The embodiment of the present application discloses a kind of audio-frequency processing method, device, storage medium and terminal, belongs to field of computer technology.The method includes：Obtain the first pending audio signal；Audio signal more than preset frequency in first audio signal is rejected, the second audio signal is obtained, the preset frequency is that the auditory system of user is made to generate fatigue and the frequency of injury；Second audio signal is exported.The embodiment of the present application is by rejecting audio signal more than preset frequency in first audio signal; the high pitch for making the auditory system of user generate fatigue and injury is not included in the second audio signal that can make; to solve the problems, such as that high pitch causes very major injury to the auditory system of user, achieve the effect that protect auditory system.
Description
Technical field
The invention relates to field of computer technology, more particularly to a kind of audio-frequency processing method, device, storage medium
And terminal.
Background technology
It listens to music and has become most common amusement and recreation project in people's daily life.Since long-time is listened using earphone
Concert leads to the auditory system fatigue of user, or even can cause physical injury to auditory system, it is therefore desirable to playing music
When protect user auditory system.
In the related technology, volume is controlled in player plays music, user can turn down volume, by reduce volume come
Protect the auditory system of user.
Other than volume, too strong high pitch also can cause prodigious injury to the auditory system of user.
Invention content
The embodiment of the present application provides a kind of audio-frequency processing method, device, storage medium and terminal, too strong for solving
The problem of high pitch also can cause prodigious injury to the auditory system of user.The technical solution is as follows：
In a first aspect, a kind of audio-frequency processing method is provided, the method includes：
Obtain the first pending audio signal；
Audio signal more than preset frequency in first audio signal is rejected, the second audio signal is obtained,
The preset frequency is that the auditory system of user is made to generate fatigue and the frequency of injury；
Second audio signal is exported.
Second aspect, provides a kind of apparatus for processing audio, and described device includes：
Acquisition module, for obtaining the first pending audio signal；
Processing module, the audio more than preset frequency in first audio signal for being obtained to the acquisition module
Signal is rejected, and the second audio signal is obtained, and the preset frequency is that the auditory system of user is made to generate fatigue and injury
Frequency；
Output module, for being exported to second audio signal that the processing module obtains.
The third aspect provides a kind of computer readable storage medium, at least one finger is stored in the storage medium
Enable, at least one section of program, code set or instruction set, at least one instruction, at least one section of program, the code set or
Instruction set is loaded by the processor and is executed to realize audio-frequency processing method as described in relation to the first aspect.
Fourth aspect provides a kind of terminal, and the terminal includes processor and memory, is stored in the memory
At least one instruction, described instruction are loaded by the processor and are executed to realize audio frequency process side as described in relation to the first aspect
Method.
The advantageous effect of technical solution provided by the embodiments of the present application includes at least：
Since preset frequency is the frequency for making the auditory system of user generate fatigue and injure, so, by first
Audio signal in audio signal more than preset frequency is rejected, and not including in the second audio signal that can make can lead
It causes auditory system to generate the high pitch of fatigue and injury, very major injury is caused to the auditory system of user to solve high pitch
Problem has achieved the effect that protect auditory system.
Description of the drawings
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present application, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the method flow diagram for the audio-frequency processing method that the application one embodiment provides；
Fig. 2 is the method flow diagram for the audio-frequency processing method that another embodiment of the application provides；
Fig. 3 is the structure diagram for the apparatus for processing audio that the application one embodiment provides；
Fig. 4 is the structure diagram for the terminal that the application one embodiment provides.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the embodiment of the present application clearer, below in conjunction with attached drawing to the application
Embodiment is described in further detail.
Referring to FIG. 1, the method flow diagram of the audio-frequency processing method provided it illustrates the application one embodiment, the sound
Frequency processing method can be applied in the player in terminal.The audio-frequency processing method, including：
Step 101, the first pending audio signal is obtained.
Step 102, audio signal more than preset frequency in first audio signal is rejected, obtains the second audio letter
Number, preset frequency is that the auditory system of user is made to generate fatigue and the frequency of injury.
Step 103, the second audio signal is exported.
In conclusion audio-frequency processing method provided by the embodiments of the present application, since preset frequency is to make the sense of hearing system of user
System generates fatigue and the frequency of injury, so, by being carried out to audio signal more than preset frequency in first audio signal
It rejects, the high pitch that auditory system can be caused to generate fatigue and injury is not included in the second audio signal that can make, from
And solve the problems, such as that high pitch causes very major injury to the auditory system of user, achieve the effect that protect auditory system.
Referring to FIG. 2, the method flow diagram of the audio-frequency processing method provided it illustrates another embodiment of the application, the sound
Frequency processing method can be applied in the player in terminal.The audio-frequency processing method, including：
Step 201, third audio signal and window function are obtained.
Third audio signal is player audio signal to be played.Third audio signal can be individual audio text
Part, such as song, voice can also be dubbing, dubbing in background music in the audio file in video file, such as movie or television play
Deng the present embodiment is not construed as limiting the type of third audio signal.
Window function is for being blocked to audio signal, in order to the function of subsequent processing.Window letter in the present embodiment
Number can be the window function of any one window, such as the window function of the window function of the window function of rectangular window, quarter window, Hanning window,
The window function of hamming window, window function of Gaussian window etc., the present embodiment is not construed as limiting window function.
Wherein, second function IW when first function W and inverse window when each window function includes a windowing process are handled,
And W*IW=1.Hereafter illustrated by taking the window function of hamming window as an example.
When getting window function, it is also necessary to which the numerical value of the window length of window function is set.Wherein, when third audio signal is through list
When sound channel exports, the unit of window length is number of samples；When third audio signal is exported through two-channel, the unit of window length is sampling
To number, here by simultaneously through L channel output a sampled value and through right channel export a sampled value be known as one
Sampling pair.
The window grows the data amount check for indicating window function data per treatment.When selecting window long, when the window of selection
When long long, the data amount check of data per treatment is more, the problem of causing to play interim card；When the window length of selection is too short
When, although the data amount check of data per treatment is less, processing frequency can improve, and also result in the problem of playing interim card,
To influence result of broadcast.So with the result of broadcast of synthetic user demand the window can be selected long.In the present embodiment, Ke Yigen
The numerical value that window is grown is set as 1024 according to empirical value, naturally it is also possible to be set as other numerical value, not repeat herein.
Step 202, third audio signal is sampled.
Player can cache the third audio signal received, according still further to setting sample frequency to caching
Third audio signal is sampled, and each sampled value is obtained.Wherein, sample frequency can be 22.05kHz, 44.1kHz, 48kHz
Etc., the present embodiment is not construed as limiting.
Step 203, when every sampling obtains an audio frame, windowing process is carried out to audio frame according to window function, is obtained
The quantity of first audio signal, the sampled value which is included is equal to the numerical value that the window of window function is grown.
Player can cache each or each pair of sampled value, when the quantity of the sampled value of caching is more than or equal to window letter
When the numerical value of several window length, it is taken out the sampled value that the window grows corresponding quantity every time, using these sampled values as a sound
Frequency frame.It is illustrated for 1024 with the numerical value of window length, when the quantity of the sampled value of caching is more than or equal to 1024, first takes out 1-
1024 (or to) sampled values further take out 1025-2048 (or to) sampled values as an audio as an audio frame
Frame, and so on, until stopping after taking out all audio frames in audio signal.
For obtained each audio frame, player carries out windowing process to the audio frame.Assuming that audio frame is X, then the
One audio signal XW=X*W.
Step 204, the first audio signal is divided into n subband signal.
Wherein, n is positive integer.When the numerical value of n is larger, although the frequency band of each subband signal is relatively narrow, reject effect compared with
It is good, but it is divided into the time-consuming longer of n subband signal, cause the performance of player poor；When the numerical value of n is smaller, although drawing
It is divided into the time-consuming shorter of n subband signal, but the frequency band of each subband signal is wider, it is bad to reject effect, so, it can integrate
The performance for the treatment of effect and player is considered to select the numerical value of n.In the present embodiment, can n be set as 8 based on experience value,
Other numerical value can certainly be set as, are not repeated herein.
Wherein, the first audio signal can be divided into n subband signal by player by multiphase filter
(SUBBAND).In the present embodiment, multiphase filter can be cascade QMF (Quadrature mirror filter, it is orthogonal
Mirror filter), it can also be other multiphase filters, be not construed as limiting herein.Below to QMF divide subband signal process into
Row is introduced.
First audio signal of input can be divided into two subband signals of height by QMF, then respectively by the two subbands
Signal inputs QMF as input signal, obtains four subband signals, then respectively that this four subband signals are defeated as input signal
Enter QMF, obtains eight subband signals.
It is 44.1kHz with sample frequency, then shown in the following table of eight obtained subband signal one.
Table one
| Subband ID | Initial frequency (Hz) | Cutoff frequency (Hz) | Centre frequency (Hz) |
| 1 | 0 | 2756.25 | 1378.125 |
| 2 | 2756.25 | 5512.5 | 4134.375 |
| 3 | 5512.5 | 8268.75 | 6890.625 |
| 4 | 8268.75 | 11025 | 9646.875 |
| 5 | 11025 | 13781.25 | 12403.125 |
| 6 | 13781.25 | 16537.5 | 15159.375 |
| 7 | 16537.5 | 19293.75 | 17915.625 |
| 8 | 19293.75 | 22050 | 20671.875 |
Since the excessively high high pitch of intensity can damage auditory system, so, player can pass through step 205-207
At least one of processing mode these subband signals are handled.
Step 205, when there are the subband signal that initial frequency is more than preset frequency, subband signal is rejected, in advance
It is that the auditory system of user is made to generate fatigue and the frequency of injury to determine frequency.
User listens to for a long time can cause auditory system tired more than the audio signal of preset frequency, continue development and go down,
It will cause irreversible permanent dysaudias for the physical injury that even can be damaged, and accumulate over a long period to auditory system.
Also, user is when listening to the audio signal more than preset frequency, imperceptible any discomfort, it is seen then that is more than preset frequency
Audio signal can be in the auditory system of unconsciously harm users, it is therefore desirable to the audio signal more than preset frequency
It is rejected, to protect auditory system.
When determining preset frequency, in addition to needing to consider that auditory system can be protected, it is also necessary to consider the sound quality of audio signal,
That is the auditory perception of user.Since the Auditory Perception of most of user understands rapid decay in 17.5kHz or more, so, it rejects
Influence of the audio signal of 17.5kHz or more to the auditory perception of user is little, can be set greater than preset frequency and be equal to
17.5kHz.By taking preset frequency is 18kHz as an example, that is, subband signal that can be directly by initial frequency in 18kHz or more carries out
It rejects, does not both interfere with sound quality in this way, high pitch can also be rejected, to protect auditory system.
By taking eight subband signals in table one as an example, since the initial frequency of the 8th subband signal (SUBBAND [8]) is big
In 18kHz, so, the 8th subband signal that can be to frequency band in 19.2kHz-22kHz is rejected.That is, SUBBAND [8]
=SUBBAND [8] * 0.
Step 206, when there are initial frequency be less than preset frequency, and cutoff frequency be more than preset frequency subband signal
When, decay to subband signal.
It, can be right when there are initial frequencies to be less than preset frequency, and cutoff frequency is more than the subband signal of preset frequency
The subband signal is rejected, to protect auditory system.It is quicker for some auditory systems if being rejected to the subband signal
For the user of sense, it can recognize and lack in finally obtained audio signal from the initial frequency to the audio letter preset frequency
Number, to influence sound quality.Optionally, attenuation processing can not also be carried out to the subband signal, to ensure sound quality.Alternatively, optional
, in protection auditory system and it can also ensure to be balanced between sound quality, you can to decay to the subband signal, to subtract
The signal strength of the small subband signal, namely reduce the volume of the subband signal, auditory system can be both protected in this way, it can also
Ensure sound quality.
In the present embodiment, a predetermined attenuation ratio can be pre-set, it, can be at this point, decay to subband signal
It is embodied as：Decay to the signal strength of subband signal according to predetermined attenuation ratio, predetermined attenuation ratio is more than or equal to 0 and small
In equal to 1.Wherein, when predetermined attenuation ratio is 0, that is, being rejected to the subband signal；When predetermined attenuation ratio
When being 1, that is, not carrying out attenuation processing to the subband signal.
By taking eight subband signals in table one as an example, and assume that preset frequency is 18kHz, due to the 7th subband signal
The initial frequency of (SUBBAND [7]) be less than 18kHz, cutoff frequency be more than 18kHz, so, can to the 7th subband signal into
Row decaying then can be by the signal intensity attenuation of the 7th subband signal to original letter by taking predetermined attenuation ratio is 0.5 as an example
The half of number intensity, that is, SUBBAND [7]=SUBBAND [7] * 0.5.It is equivalent at this time the signal of the 7th subband signal is strong
Degree decaying half, also that is, by the volume down half of the 7th subband signal.
Step 207, when there are the subband signal that cutoff frequency is less than preset frequency, compression amplitude limit is carried out to subband signal
It handles, the signal strength of subband signal is less than or equal to predetermined threshold after compression amplitude limiting processing, and predetermined threshold is according to dynamic
What range threshold determined, dynamic range thresholds are that auditory system is made to generate fatigue and the dynamic range of injury.
Wherein, dynamic range refers to the maximum value of audio signal and the difference of minimum value.User is listened to for a long time more than dynamic
The audio signal of state range threshold can cause auditory system tired, continue development and go down, or even can be damaged to auditory system,
And it will cause irreversible permanent dysaudias for the physical injury accumulated over a long period.Also, user is listening to more than dynamic model
When enclosing the audio signal of threshold value, imperceptible any discomfort, it is seen then that the audio signal more than dynamic range thresholds can not know
The unconsciously auditory system of middle harm users, it is therefore desirable to the dynamic range to reducing audio signal, to protect auditory system.
In the present embodiment, each subband signal that preset frequency can be less than to cutoff frequency configures a compression amplitude limit
Device determines a predetermined threshold further according to dynamic range thresholds, and compression amplitude limit is carried out to subband signal by compressing limiter
Processing so that the signal strength of subband signal is less than predetermined threshold after compression amplitude limiting processing, to reduce the dynamic of subband signal
Range, so that the second audio signal after synthesis is more smooth.
Player needs judge whether to need to carry out compression amplitude limiting processing to subband signal.When the signal strength of subband signal
When the predetermined threshold of more than or equal to corresponding one compression limiter, compression amplitude limiting processing is carried out to the subband signal；Group
When the signal strength of band signal is less than the predetermined threshold of corresponding one compression limiter, which is not compressed
Amplitude limiting processing.Wherein, compression amplitude limiting processing refers to when the signal strength of subband signal is more than or equal to predetermined threshold, to subband
Signal carries out compression processing and gain process.Compression processing refers to according to the predetermined compression comparer band signal in compression limiter
Compression processing is carried out, and compression ratio is used to indicate the speed to the compression speed of subband signal, and subband signal after compression processing
Dynamic range be less than dynamic range thresholds；Gain process refer to according to compression limiter in predetermined gain to subband signal into
Row gain process, and predetermined gain is more than or equal to 0 and less than or equal to the absolute value of predetermined threshold.Namely to subband signal into
Row amplification, predetermined gain here are used to indicate the amplification factor to the signal strength of subband signal.Wherein, threshold value, compression
Than that can be pre-set empirical value with yield value, the present embodiment be not construed as limiting.
It should be noted that compression processing is used to reduce the dynamic range of subband signal, at this point, the volume of audio signal
Can accordingly it reduce.In one implementation, player does not carry out gain process to the subband signal after compression processing, with protection
Auditory system.Since the volume of subband signal after compression processing is smaller, cause sound quality poor, so, in another realization method
In, it in protection auditory system and can also ensure to be balanced between sound quality, i.e., the subband signal after compression processing be increased
Benefit is managed, namely increases the volume of audio signal, to ensure sound quality.Wherein, when predetermined gain is 0, that is, not to pressure
Contracting treated subband signal carries out gain process；When predetermined gain is the absolute value of predetermined threshold, that is, to pressure
Contracting treated subband signal carries out gain process, and the signal strength of subband signal is less than or equal to predetermined threshold after gain process
Value.
Still by taking eight a kind of subband signals of table as an example, then to first subband signal (SUBBAND [1]) to the 6th
A compression limiter is respectively configured in subband signal (SUBBAND [6]), and configuration parameter is as shown in following table two.
Table two
| ID | Thresholding (dB) | Compression ratio | Gain (dB) | The Attack times (ms) | The Release times (ms) |
| LIM1 | -3 | 1:It is infinitely great | 1.5 | 10 | 100 |
| LIM2 | -5 | 1:5 | 1.0 | 15 | 150 |
| LIM3 | -5 | 1:5 | 1.0 | 15 | 150 |
| LIM4 | -6 | 1:5 | 1.0 | 20 | 180 |
| LIM5 | -6 | 1:10 | 0 | 20 | 180 |
| LIM6 | -6 | 1:10 | 0 | 30 | 200 |
Wherein, LIM1 corresponds to SUBBAND [1], and LIM2 corresponds to SUBBAND [2], and so on.
The present embodiment is illustrated the processing procedure of SUBBAND [1] with LIM1, then first judges SUBBAND's [1]
Whether signal strength is more than -3dB；When the signal strength is more than or equal to -3dB, according to 1:Infinitely great predetermined compression ratio pair
SUBBAND [1] is compressed, and here 1:Infinity refers to according to most fast compression speed compression SUBBAND [1]；Again to compression
The SUBBAND [1] obtained after processing carries out 1.5 gain process, obtains LIM1 (SUBBAND [1])；When the signal strength is small
When -3dB, SUBBAND [1] is not handled.The compression of the compression amplitude limiting processing and SUBBAND [1] of other subband signals
Amplitude limiting processing is similar, repeats no more.
Wherein, the Attack times are referred to as input time, refer to that subband signal is inputted corresponding compression limiter
Time；The Release times are referred to as output time, refer to by subband signal export it is corresponding compression limiter when
Between.Here the Attack times and Release times is the experimental data once tested, and different terminals can have different
Attack times and Release times.
Step 208, remaining subband signal is synthesized, obtains the second audio signal.
Player can synthesize the subband signal that step 205-207 is obtained, and obtain the second audio signal.
Still by taking eight subband signals in table one as an example, then second audio signal Y=SUBBAND [8] * 0+SUBBAND
[7]*0.5+LIM6(SUBBAND[6])+LIM5(SUBBAND[5])+…+LIM1(SUBBAND[1])。
Step 209, it carries out inverse window to the second audio signal to handle, obtains the 4th audio signal.
Assuming that the 4th audio signal is OUT, then OUT=Y*IW.
Step 210, the 4th audio signal is exported.
The 4th audio signal of player pair plays out, since stronger high pitch is removed, so, no matter user whether
Earphone is worn, the auditory system of user will not all be damaged.
In conclusion audio-frequency processing method provided by the embodiments of the present application, since preset frequency is to make the sense of hearing system of user
System generates fatigue and the frequency of injury, so, by being carried out to audio signal more than preset frequency in first audio signal
It rejects, the high pitch that auditory system can be caused to generate fatigue and injury is not included in the second audio signal that can make, from
And solve the problems, such as that high pitch causes very major injury to the auditory system of user, achieve the effect that protect auditory system.
It, can be right when there are initial frequencies to be less than preset frequency, and cutoff frequency is more than the subband signal of preset frequency
The subband signal is rejected, to protect auditory system；Attenuation processing can not also be carried out to the subband signal, to ensure sound
Matter；In protection auditory system and it can also ensure to be balanced between sound quality, you can to decay to the subband signal, to subtract
The signal strength of the small subband signal, namely reduce the volume of the subband signal, auditory system can be both protected in this way, it can also
Ensure sound quality.
When there are the subband signal that cutoff frequency is less than preset frequency, a compression amplitude limit is configured to each subband signal
Device determines a predetermined threshold further according to dynamic range thresholds, and compression amplitude limit is carried out to subband signal by compressing limiter
Processing so that the signal strength of subband signal is less than predetermined threshold after compression amplitude limiting processing, to reduce the dynamic of subband signal
Range both can protect auditory system, it is also possible that the second sound after synthesis by reducing the dynamic range of subband signal
Frequency signal is more smooth.
Referring to FIG. 3, the structure diagram of the apparatus for processing audio provided it illustrates the application one embodiment, the audio
Processing unit can be applied in the player in terminal.The apparatus for processing audio, including：
Acquisition module 301, for obtaining the first pending audio signal；
Processing module 302, the audio letter more than preset frequency in the first audio signal for being obtained to acquisition module 301
It number is rejected, obtains the second audio signal, preset frequency is that the auditory system of user is made to generate fatigue and the frequency of injury；
Output module 303, for being exported to the second audio signal that processing module 302 obtains.
In conclusion apparatus for processing audio provided by the embodiments of the present application, since preset frequency is to make the sense of hearing system of user
System generates fatigue and the frequency of injury, so, by being carried out to audio signal more than preset frequency in first audio signal
It rejects, the high pitch that auditory system can be caused to generate fatigue and injury is not included in the second audio signal that can make, from
And solve the problems, such as that high pitch causes very major injury to the auditory system of user, achieve the effect that protect auditory system.
Referring to FIG. 3, the structure diagram of the apparatus for processing audio provided it illustrates the application another embodiment, the audio
Processing unit can be applied in the player in terminal.The apparatus for processing audio, including：
Acquisition module 301, for obtaining the first pending audio signal；
Processing module 302, the audio letter more than preset frequency in the first audio signal for being obtained to acquisition module 301
It number is rejected, obtains the second audio signal, preset frequency is that the auditory system of user is made to generate fatigue and the frequency of injury；
Output module 303, for being exported to the second audio signal that processing module 302 obtains.
Optionally, preset frequency is more than or equal to 17.5kHz.
Optionally, processing module 302 are additionally operable to：
First audio signal is divided into n subband signal, n is positive integer；
When there are the subband signal that initial frequency is more than preset frequency, subband signal is rejected；
Remaining subband signal is synthesized, the second audio signal is obtained.
Optionally, processing module 302 are additionally operable to：
It is synthesized to remaining subband signal, before obtaining the second audio signal, when there are initial frequencies to be less than in advance
Determine frequency, and when cutoff frequency is more than the subband signal of preset frequency, decays to subband signal.
Optionally, processing module 302 are additionally operable to：
Decay to the signal strength of subband signal according to predetermined attenuation ratio, predetermined attenuation ratio be more than or equal to 0 and
Less than or equal to 1.
Optionally, processing module 302 are additionally operable to：
It is synthesized to remaining subband signal, before obtaining the second audio signal, when there are cutoff frequencies to be less than in advance
When determining the subband signal of frequency, compression amplitude limiting processing carried out to subband signal, the signal for compressing subband signal after amplitude limiting processing is strong
Degree is less than or equal to predetermined threshold, and predetermined threshold is determined according to dynamic range thresholds, and dynamic range thresholds are to make the sense of hearing
System generates fatigue and the dynamic range of injury.
Optionally, processing module 302 are additionally operable to：
Compression processing is carried out according to predetermined compression comparer band signal, predetermined compression ratio is used to indicate the pressure to subband signal
The speed of contracting speed, and the dynamic range of subband signal is less than dynamic range thresholds after compression processing；
Gain process is carried out to the subband signal after compression processing according to predetermined gain, predetermined gain is used to indicate to subband
The amplification factor of the signal strength of signal, and predetermined gain is more than or equal to 0 and less than or equal to the absolute value of predetermined threshold.
Optionally, acquisition module 301 are additionally operable to：Obtain third audio signal and window function；Third audio signal is carried out
Sampling；When every sampling obtains an audio frame, windowing process is carried out to audio frame according to window function, obtains the first audio letter
Number, the quantity for the sampled value that audio frame is included is equal to the numerical value that the window of window function is grown；
Output module 303, is additionally operable to：Inverse window is carried out to the second audio signal to handle, and obtains the 4th audio signal；To the 4th
Audio signal is exported.
In conclusion apparatus for processing audio provided by the embodiments of the present application, since preset frequency is to make the sense of hearing system of user
System generates fatigue and the frequency of injury, so, by being carried out to audio signal more than preset frequency in first audio signal
It rejects, the high pitch that auditory system can be caused to generate fatigue and injury is not included in the second audio signal that can make, from
And solve the problems, such as that high pitch causes very major injury to the auditory system of user, achieve the effect that protect auditory system.
It, can be right when there are initial frequencies to be less than preset frequency, and cutoff frequency is more than the subband signal of preset frequency
The subband signal is rejected, to protect auditory system；Attenuation processing can not also be carried out to the subband signal, to ensure sound
Matter；In protection auditory system and it can also ensure to be balanced between sound quality, you can to decay to the subband signal, to subtract
The signal strength of the small subband signal, namely reduce the volume of the subband signal, auditory system can be both protected in this way, it can also
Ensure sound quality.
When there are the subband signal that cutoff frequency is less than preset frequency, a compression amplitude limit is configured to each subband signal
Device determines a predetermined threshold further according to dynamic range thresholds, and compression amplitude limit is carried out to subband signal by compressing limiter
Processing so that the signal strength of subband signal is less than predetermined threshold after compression amplitude limiting processing, to reduce the dynamic of subband signal
Range both can protect auditory system, it is also possible that the second sound after synthesis by reducing the dynamic range of subband signal
Frequency signal is more smooth.
Fig. 4 shows the structure diagram for the terminal 400 that one exemplary embodiment of the application provides.The terminal 400 can be with
It is portable mobile termianl, such as：Smart mobile phone, tablet computer, MP3 player (Moving Picture Experts
Group Audio Layer III, dynamic image expert's compression standard audio level 3), MP4 (Moving Picture
Experts Group Audio Layer IV, dynamic image expert's compression standard audio level 4) player, laptop
Or desktop computer.Terminal 400 is also possible to be referred to as other names such as user equipment, portable terminal, laptop terminal, terminal console
Claim.Player is installed in terminal 400.
In general, terminal 400 includes：Processor 401 and memory 402.
Processor 401 may include one or more processing cores, such as 4 core processors, 8 core processors etc..Place
DSP (Digital Signal Processing, Digital Signal Processing), FPGA (Field- may be used in reason device 401
Programmable Gate Array, field programmable gate array), PLA (Programmable Logic Array, may be programmed
Logic array) at least one of example, in hardware realize.Processor 401 can also include primary processor and coprocessor, master
Processor is the processor for being handled data in the awake state, also referred to as CPU (Central Processing
Unit, central processing unit)；Coprocessor is the low power processor for being handled data in the standby state.?
In some embodiments, processor 401 can be integrated with GPU (Graphics Processing Unit, image processor),
GPU is used to be responsible for the rendering and drafting of content to be shown needed for display screen.In some embodiments, processor 401 can also wrap
AI (Artificial Intelligence, artificial intelligence) processor is included, the AI processors are for handling related machine learning
Calculating operation.
Memory 402 may include one or more computer readable storage mediums, which can
To be non-transient.Memory 402 may also include high-speed random access memory and nonvolatile memory, such as one
Or multiple disk storage equipments, flash memory device.In some embodiments, the non-transient computer in memory 402 can
Storage medium is read for storing at least one instruction, at least one instruction is for performed to realize this Shen by processor 401
Please in embodiment of the method provide audio-frequency processing method.
In some embodiments, terminal 400 is also optional includes：Peripheral device interface 403 and at least one peripheral equipment.
It can be connected by bus or signal wire between processor 401, memory 402 and peripheral device interface 403.Each peripheral equipment
It can be connected with peripheral device interface 403 by bus, signal wire or circuit board.Specifically, peripheral equipment includes：Radio circuit
404, at least one of touch display screen 405, camera 406, voicefrequency circuit 407, positioning component 408 and power supply 409.
Peripheral device interface 403 can be used for I/O (Input/Output, input/output) is relevant at least one outer
Peripheral equipment is connected to processor 401 and memory 402.In some embodiments, processor 401, memory 402 and peripheral equipment
Interface 403 is integrated on same chip or circuit board；In some other embodiments, processor 401, memory 402 and outer
Any one or two in peripheral equipment interface 403 can realize on individual chip or circuit board, the present embodiment to this not
It is limited.
Radio circuit 404 is for receiving and emitting RF (Radio Frequency, radio frequency) signal, also referred to as electromagnetic signal.It penetrates
Frequency circuit 404 is communicated by electromagnetic signal with communication network and other communication equipments.Radio circuit 404 turns electric signal
It is changed to electromagnetic signal to be sent, alternatively, the electromagnetic signal received is converted to electric signal.Optionally, radio circuit 404 wraps
It includes：Antenna system, RF transceivers, one or more amplifiers, tuner, oscillator, digital signal processor, codec chip
Group, user identity module card etc..Radio circuit 404 can be carried out by least one wireless communication protocol with other terminals
Communication.The wireless communication protocol includes but not limited to：Metropolitan Area Network (MAN), each third generation mobile communication network (2G, 3G, 4G and 5G), wireless office
Domain net and/or WiFi (Wireless Fidelity, Wireless Fidelity) network.In some embodiments, radio circuit 404 may be used also
To include the related circuits of NFC (Near Field Communication, wireless near field communication), the application is not subject to this
It limits.
Display screen 405 is for showing UI (User Interface, user interface).The UI may include figure, text, figure
Mark, video and its their arbitrary combination.When display screen 405 is touch display screen, display screen 405 also there is acquisition to show
The ability of the surface of screen 405 or the touch signal of surface.The touch signal can be used as control signal to be input to processor
401 are handled.At this point, display screen 405 can be also used for providing virtual push button and/or dummy keyboard, also referred to as soft button and/or
Soft keyboard.In some embodiments, display screen 405 can be one, and the front panel of terminal 400 is arranged；In other embodiments
In, display screen 405 can be at least two, be separately positioned on the different surfaces of terminal 400 or in foldover design；In still other reality
Apply in example, display screen 405 can be flexible display screen, be arranged on the curved surface of terminal 400 or fold plane on.Even, it shows
Display screen 405 can also be arranged to non-rectangle irregular figure, namely abnormity screen.LCD (Liquid may be used in display screen 405
Crystal Display, liquid crystal display), OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode)
Etc. materials prepare.
CCD camera assembly 406 is for acquiring image or video.Optionally, CCD camera assembly 406 include front camera and
Rear camera.In general, the front panel in terminal is arranged in front camera, rear camera is arranged at the back side of terminal.One
In a little embodiments, rear camera at least two is main camera, depth of field camera, wide-angle camera, focal length camera shooting respectively
Any one in head, to realize that main camera and the fusion of depth of field camera realize background blurring function, main camera and wide-angle
Camera fusion realizes that pan-shot and VR (Virtual Reality, virtual reality) shooting functions or other fusions are clapped
Camera shooting function.In some embodiments, CCD camera assembly 406 can also include flash lamp.Flash lamp can be monochromatic warm flash lamp,
It can also be double-colored temperature flash lamp.Double-colored temperature flash lamp refers to the combination of warm light flash lamp and cold light flash lamp, be can be used for not
With the light compensation under colour temperature.
Voicefrequency circuit 407 may include microphone and loud speaker.Microphone is used to acquire the sound wave of user and environment, and will
Sound wave, which is converted to electric signal and is input to processor 401, to be handled, or is input to radio circuit 404 to realize voice communication.
For stereo acquisition or the purpose of noise reduction, microphone can be multiple, be separately positioned on the different parts of terminal 400.Mike
Wind can also be array microphone or omnidirectional's acquisition type microphone.Loud speaker is then used to that processor 401 or radio circuit will to be come from
404 electric signal is converted to sound wave.Loud speaker can be traditional wafer speaker, can also be piezoelectric ceramic loudspeaker.When
When loud speaker is piezoelectric ceramic loudspeaker, the audible sound wave of the mankind can be not only converted electrical signals to, it can also be by telecommunications
Number the sound wave that the mankind do not hear is converted to carry out the purposes such as ranging.In some embodiments, voicefrequency circuit 407 can also include
Earphone jack.
Positioning component 408 is used for the current geographic position of positioning terminal 400, to realize navigation or LBS (Location
Based Service, location based service).Positioning component 408 can be the GPS (Global based on the U.S.
Positioning System, global positioning system), the dipper system of China, Russia Gray receive this system or European Union
The positioning component of Galileo system.
Power supply 409 is used to be powered for the various components in terminal 400.Power supply 409 can be alternating current, direct current,
Disposable battery or rechargeable battery.When power supply 409 includes rechargeable battery, which can support wired charging
Or wireless charging.The rechargeable battery can be also used for supporting fast charge technology.
In some embodiments, terminal 400 further include there are one or multiple sensors 410.The one or more sensors
410 include but not limited to：Acceleration transducer 411, gyro sensor 412, pressure sensor 413, fingerprint sensor 414,
Optical sensor 415 and proximity sensor 416.
The acceleration that acceleration transducer 411 can detect in three reference axis of the coordinate system established with terminal 400 is big
It is small.For example, acceleration transducer 411 can be used for detecting component of the acceleration of gravity in three reference axis.Processor 401 can
With the acceleration of gravity signal acquired according to acceleration transducer 411, control touch display screen 405 is regarded with transverse views or longitudinal direction
Figure carries out the display of user interface.Acceleration transducer 411 can be also used for game or the acquisition of the exercise data of user.
Gyro sensor 412 can be with the body direction of detection terminal 400 and rotational angle, and gyro sensor 412 can
To cooperate with acquisition user to act the 3D of terminal 400 with acceleration transducer 411.Processor 401 is according to gyro sensor 412
Following function may be implemented in the data of acquisition：When action induction (for example changing UI according to the tilt operation of user), shooting
Image stabilization, game control and inertial navigation.
The lower layer of side frame and/or touch display screen 405 in terminal 400 can be arranged in pressure sensor 413.Work as pressure
The gripping signal that user can be detected in the side frame of terminal 400 to terminal 400 is arranged in sensor 413, by processor 401
Right-hand man's identification or prompt operation are carried out according to the gripping signal that pressure sensor 413 acquires.When the setting of pressure sensor 413 exists
When the lower layer of touch display screen 405, the pressure operation of touch display screen 405 is realized to UI circle according to user by processor 401
Operability control on face is controlled.Operability control includes button control, scroll bar control, icon control, menu
At least one of control.
Fingerprint sensor 414 is used to acquire the fingerprint of user, collected according to fingerprint sensor 414 by processor 401
The identity of fingerprint recognition user, alternatively, by fingerprint sensor 414 according to the identity of collected fingerprint recognition user.It is identifying
When the identity for going out user is trusted identity, the user is authorized to execute relevant sensitive operation, the sensitive operation packet by processor 401
Include solution lock screen, check encryption information, download software, payment and change setting etc..Terminal can be set in fingerprint sensor 414
400 front, the back side or side.When being provided with physical button or manufacturer Logo in terminal 400, fingerprint sensor 414 can be with
It is integrated with physical button or manufacturer Logo.
Optical sensor 415 is for acquiring ambient light intensity.In one embodiment, processor 401 can be according to optics
The ambient light intensity that sensor 415 acquires controls the display brightness of touch display screen 405.Specifically, when ambient light intensity is higher
When, the display brightness of touch display screen 405 is turned up；When ambient light intensity is relatively low, the display for turning down touch display screen 405 is bright
Degree.In another embodiment, the ambient light intensity that processor 401 can also be acquired according to optical sensor 415, dynamic adjust
The acquisition parameters of CCD camera assembly 406.
Proximity sensor 416, also referred to as range sensor are generally arranged at the front panel of terminal 400.Proximity sensor 416
The distance between front for acquiring user and terminal 400.In one embodiment, when proximity sensor 416 detects use
When family and the distance between the front of terminal 400 taper into, touch display screen 405 is controlled from bright screen state by processor 401
It is switched to breath screen state；When proximity sensor 416 detects user and the distance between the front of terminal 400 becomes larger,
Touch display screen 405 is controlled by processor 401 and is switched to bright screen state from breath screen state.
It will be understood by those skilled in the art that the restriction of the not structure paired terminal 400 of structure shown in Fig. 4, can wrap
It includes than illustrating more or fewer components, either combine certain components or is arranged using different components.
The application one embodiment provides a kind of computer readable storage medium, is stored at least in the storage medium
One instruction, at least one section of program, code set or instruction set, at least one instruction, at least one section of program, the generation
Code collection or instruction set are loaded by the processor and are executed to realize audio-frequency processing method as described above.
The application one embodiment provides a kind of terminal, and the terminal includes processor and memory, the memory
In be stored at least one instruction, described instruction is loaded by the processor and is executed to realize audio frequency process side as described above
Method.
It should be noted that：The apparatus for processing audio that above-described embodiment provides is when carrying out audio frequency process, only with above-mentioned each
The division progress of function module, can be as needed and by above-mentioned function distribution by different work(for example, in practical application
Energy module is completed, i.e., the internal structure of apparatus for processing audio is divided into different function modules, described above complete to complete
Portion or partial function.In addition, the apparatus for processing audio that above-described embodiment provides belongs to same with audio-frequency processing method embodiment
Design, specific implementation process refer to embodiment of the method, and which is not described herein again.
One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The above is not to limit the embodiment of the present application, all within the spirit and principle of the embodiment of the present application, institute
Any modification, equivalent substitution, improvement and etc. of work, should be included within the protection domain of the embodiment of the present application.
Claims (18)
1. a kind of audio-frequency processing method, which is characterized in that the method includes：
Obtain the first pending audio signal；
Audio signal more than preset frequency in first audio signal is rejected, the second audio signal is obtained, it is described
Preset frequency is that the auditory system of user is made to generate fatigue and the frequency of injury；
Second audio signal is exported.
2. according to the method described in claim 1, it is characterized in that, the preset frequency is more than or equal to 17.5kHz.
3. according to the method described in claim 1, it is characterized in that, it is described to preset frequency in first audio signal more than
Audio signal rejected, obtain the second audio signal, including：
First audio signal is divided into n subband signal, the n is positive integer；
When there are the subband signal that initial frequency is more than the preset frequency, the subband signal is rejected；
Remaining subband signal is synthesized, second audio signal is obtained.
4. according to the method described in claim 3, it is characterized in that, synthesized to remaining subband signal described, obtain
Before second audio signal, the method further includes：
It is right when there are initial frequencies to be less than the preset frequency, and cutoff frequency is more than the subband signal of the preset frequency
The subband signal is decayed.
5. according to the method described in claim 4, it is characterized in that, described decay to the subband signal, including：
Decay to the signal strength of the subband signal according to predetermined attenuation ratio, the predetermined attenuation ratio is more than or equal to
0 and be less than or equal to 1.
6. according to the method described in claim 3, it is characterized in that, synthesized to remaining subband signal described, obtain
Before second audio signal, the method further includes：
When there are the subband signal that cutoff frequency is less than the preset frequency, the subband signal is carried out at compression amplitude limit
It manages, the signal strength of the subband signal is less than or equal to predetermined threshold after compression amplitude limiting processing, and the predetermined threshold is root
It is determined according to dynamic range thresholds, the dynamic range thresholds are the dynamic models for making the auditory system generate fatigue and injury
It encloses.
7. according to the method described in claim 6, it is characterized in that, described carry out compression amplitude limiting processing to the subband signal,
Including：
Compression processing is carried out to the subband signal according to predetermined compression ratio, the predetermined compression ratio is used to indicate to the subband
The speed of the compression speed of signal, and the dynamic range of the subband signal is less than the dynamic range thresholds after compression processing；
Gain process is carried out to the subband signal after the compression processing according to predetermined gain, the predetermined gain is used to indicate pair
The amplification factor of the signal strength of the subband signal, and the predetermined gain is more than or equal to 0 and is less than or equal to the predetermined door
The absolute value of limit value.
8. method according to any one of claims 1 to 7, which is characterized in that
The first pending audio signal of the acquisition, including：Obtain third audio signal and window function；To the third audio
Signal is sampled；When every sampling obtains an audio frame, windowing process is carried out to the audio frame according to the window function,
First audio signal is obtained, the quantity for the sampled value that the audio frame is included is equal to the number that the window of the window function is grown
Value；
It is described that second audio signal is exported, including：Inverse window is carried out to second audio signal to handle, and obtains the
Four audio signals；4th audio signal is exported.
9. a kind of apparatus for processing audio, which is characterized in that described device includes：
Acquisition module, for obtaining the first pending audio signal；
Processing module, the audio signal more than preset frequency in first audio signal for being obtained to the acquisition module
It is rejected, obtains the second audio signal, the preset frequency is the frequency for making the auditory system of user generate fatigue and injury
Rate；
Output module, for being exported to second audio signal that the processing module obtains.
10. device according to claim 9, which is characterized in that the preset frequency is more than or equal to 17.5kHz.
11. device according to claim 9, which is characterized in that the processing module is additionally operable to：
First audio signal is divided into n subband signal, the n is positive integer；
When there are the subband signal that initial frequency is more than the preset frequency, the subband signal is rejected；
Remaining subband signal is synthesized, second audio signal is obtained.
12. according to the devices described in claim 11, which is characterized in that the processing module is additionally operable to：
Remaining subband signal is synthesized described, before obtaining second audio signal, when that there are initial frequencies is small
In the preset frequency, and when cutoff frequency is more than the subband signal of the preset frequency, decay to the subband signal.
13. device according to claim 12, which is characterized in that the processing module is additionally operable to：
Decay to the signal strength of the subband signal according to predetermined attenuation ratio, the predetermined attenuation ratio is more than or equal to
0 and be less than or equal to 1.
14. according to the devices described in claim 11, which is characterized in that the processing module is additionally operable to：
Remaining subband signal is synthesized described, before obtaining second audio signal, when that there are cutoff frequencies is small
When the subband signal of the preset frequency, compression amplitude limiting processing carried out to the subband signal, is compressed described after amplitude limiting processing
The signal strength of subband signal is less than or equal to predetermined threshold, and the predetermined threshold is determined according to dynamic range thresholds,
The dynamic range thresholds are that the auditory system is made to generate fatigue and the dynamic range of injury.
15. device according to claim 14, which is characterized in that the processing module is additionally operable to：
Compression processing is carried out to the subband signal according to predetermined compression ratio, the predetermined compression ratio is used to indicate to the subband
The speed of the compression speed of signal, and the dynamic range of the subband signal is less than the dynamic range thresholds after compression processing；
Gain process is carried out to the subband signal after the compression processing according to predetermined gain, the predetermined gain is used to indicate pair
The amplification factor of the signal strength of the subband signal, and the predetermined gain is more than or equal to 0 and is less than or equal to the predetermined door
The absolute value of limit value.
16. according to any device of claim 9 to 15, which is characterized in that
The acquisition module, is additionally operable to：Obtain third audio signal and window function；The third audio signal is sampled；
When every sampling obtains an audio frame, windowing process is carried out to the audio frame according to the window function, obtains described first
The quantity of audio signal, the sampled value that the audio frame is included is equal to the numerical value that the window of the window function is grown；
The output module, is additionally operable to：Inverse window is carried out to second audio signal to handle, and obtains the 4th audio signal；To institute
The 4th audio signal is stated to be exported.
17. a kind of computer readable storage medium, which is characterized in that be stored at least one instruction, extremely in the storage medium
Few one section of program, code set or instruction set, at least one instruction, at least one section of program, the code set or the instruction
Collection is loaded by the processor and is executed to realize audio-frequency processing method as described in any of the claims 1 to 8.
18. a kind of terminal, which is characterized in that the terminal includes processor and memory, is stored at least in the memory
One instruction, described instruction are loaded by the processor and are executed to realize audio frequency process as described in any of the claims 1 to 8
Method.
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| CN201810609905.7A CN108804072A (en) | 2018-06-13 | 2018-06-13 | Audio-frequency processing method, device, storage medium and terminal |
| PCT/CN2018/117898 WO2019237666A1 (en) | 2018-06-13 | 2018-11-28 | Audio processing method and device, storage medium and electronic device |
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| CN110931021A (en) * | 2019-10-29 | 2020-03-27 | 平安科技（深圳）有限公司 | Audio signal processing method and device |
| CN111128167A (en) * | 2019-12-30 | 2020-05-08 | 深圳创维－Rgb电子有限公司 | Far-field voice awakening method and device, electronic product and storage medium |
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