CN105578272B - A kind of audio gain Automatic adjustment method and device - Google Patents
A kind of audio gain Automatic adjustment method and device Download PDFInfo
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- CN105578272B CN105578272B CN201510947940.6A CN201510947940A CN105578272B CN 105578272 B CN105578272 B CN 105578272B CN 201510947940 A CN201510947940 A CN 201510947940A CN 105578272 B CN105578272 B CN 105578272B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
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Abstract
The embodiment of the invention provides a kind of audio gain Automatic adjustment method and devices, it include: the audio gain curve and maximal audio amplitude in Pre-set reference channel first, then by being parsed to obtain the audio data of audio signal to the audio signal after I2S is encoded, sampling obtains maximal audio amplitude of the target input channel under volume reference point, and it is compared with the maximal audio amplitude of reference channel under read volume reference point, to adjust the audio gain of target input channel, and keep the maximal audio gain of target input channel identical as reference channel.Therefore, according to the maximal audio gain adjustment audio gain of reference channel under unlike signal channel, so that the maximal audio amplitude of the audio signal through I2S coding is identical, it is inputted under identical volume so as to avoid user in the prior art, when the identical audio signal of unlike signal channel input range, it causes audio amplitude to change because of code encoding/decoding mode difference, and then output sound is caused jumping phenomenon occur.
Description
Technical field
The present invention relates to field of signal processing more particularly to a kind of audio gain Automatic adjustment method and devices.
Background technique
Currently, being commonly configured with TV interface, USB interface, height on the audio frequency apparatuses such as TV, set-top box or high definition player
Clear multimedia interface (HDMI), USB interface etc., these signal source interfaces can receive different types of audio signal.In addition,
Existing audio frequency apparatus volume processing block diagram as shown in Figure 1, when user input identical volume when, unlike signal channel it is identical
Amplitude audio signal is successively adjusted by audio decoder, audio, after I2S coding and power amplifier amplification, and the amplitude of output is different, from
And user is made to experience output sound jumping phenomenon in switching channel.
For above-mentioned phenomenon, the main reason for inventor's analysis is found, the phenomenon is due to different signal source interface
Audio signal use different code encoding/decoding modes, different code encoding/decoding modes has different sample rates etc. again, so as to cause being
The amplitude for the audio signal for exporting the audio signal of same magnitude after different encoding and decoding is also different.When input same magnitude
Audio signal when, due to same audio gain curve preset under different channels, user input volume also same case when
Gain range is identical, but since encoding and decoding will lead to the difference of output audio signal amplitude, and then user can experience loudspeaker
The sound of output has jumping phenomenon.And in response to this problem, existing volume adjusting method is mainly that user is defeated by manually adjusting
Enter the size of volume, and then change the volume of final output, but this method operation is comparatively laborious, and user experience effect is poor.
Summary of the invention
The embodiment of the present invention provides a kind of audio gain Automatic adjustment method and device, to solve different channels switchings
When output sound mutation problems.
In order to achieve the above objectives, the embodiment of the invention provides a kind of audio gain Automatic adjustment methods, comprising:
Based on the audio signal of target input channel, sampling obtains the audio signal in the maximal audio of volume reference point
Amplitude；
Based on maximal audio amplitude of the obtained audio signal under the volume reference point is sampled, with Pre-set reference
Maximal audio amplitude com parison of the channel under the volume reference point is as a result, adjust the target input channel audio letter with instruction
Number tone control gain.
The embodiment of the invention provides a kind of audio gain self-checking devices, comprising:
Module is obtained, for the audio signal based on target input channel, sampling obtains the audio signal and joins in volume
The maximal audio amplitude of examination point；
Comparison module, maximal audio width of the audio signal under the volume reference point for being obtained based on sampling
Value, with maximal audio amplitude com parison result of the Pre-set reference channel under the volume reference point.
Tone control, for adjusting the gain of the target input channel audio signal according to comparison result.
The embodiment of the invention also provides a kind of audio gain Automatic adjustment methods, comprising:
The audio signal of reference channel after I2S is encoded is parsed to obtain the maximal audio amplitude under volume reference point,
And store the maximal audio amplitude；
Obtain maximal audio amplitude of the target input channel under the volume reference point, the reference channel with storage
Maximal audio amplitude under the volume reference point is compared；
The tone control gain of the target input channel audio signal is adjusted according to comparison result.
For overcome the deficiencies in the prior art, the embodiment of the invention provides a kind of audio gain Automatic adjustment method and dresses
It sets, first the maximal audio amplitude under the audio gain curve and volume reference point in Pre-set reference channel, then by through I2S
Audio signal after coding is parsed to obtain the audio data of audio signal, finds out target input channel under volume reference point
Maximal audio amplitude, and be compared with the maximal audio amplitude of reference channel under read volume reference point, to adjust
The audio gain of target input channel, and keep the maximal audio gain of target input channel identical as reference channel.Therefore, no
With the maximal audio gain adjustment audio gain under signal path according to reference channel, so that being compiled under volume reference point through I2S
The maximal audio amplitude of the audio signal of code is identical, and channels different in this way input the audio of power amplifier according to the audio gain after adjusting
Signal amplitude is also identical, therefore avoids user in the prior art and input under identical volume, unlike signal channel input range phase
With audio signal when, because code encoding/decoding mode difference due to cause audio amplitude to change, the maximum sound of the audio signal exported in this way
Frequency amplitude, which also changes, causes output sound jumping phenomenon occur.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be in embodiment or description of the prior art
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the invention
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the audio processing block diagram of existing electronic equipment；
Fig. 2 is a kind of method flow schematic diagram for audio gain automatic adjustment that the embodiment of the present invention one provides；
Fig. 3 is a kind of apparatus structure schematic diagram of audio gain automatic adjustment provided by Embodiment 2 of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Refering to Fig. 3, the audio signal in the unlike signal channel in TV is by each channel signal input module 101, then passes through
Audio decoder module 102 enters tone control 104 after decoding, and tone control 104 is inputted according to user's input module 103
Volume search corresponding audio from preset audio gain curve and increase, it is then right by sampling and I2S coding module 105
After it is encoded, output is to loudspeaker 107 after the amplification of power amplifier module 106.The present invention on the basis of above-mentioned audio conditioning apparatus,
Feedback device, including I2S analysis module 301, acquisition module 302, memory module 303 and comparison module 304 are increased,
In, I2S analysis module 301 is used to be parsed to obtain audio data to the audio signal after I2S coding；Module 302 is obtained to use
In maximal audio amplitude is found out according to audio data and from memory module 303 read reference channel maximal audio amplitude；
Memory module 303 is used to store the maximal audio amplitude of reference channel；Comparison module 304 is then used for target input channel most
Big audio amplitude is compared with the maximal audio amplitude of reference channel, and comparison result is fed back to tone control 104.Sound
The audio gain that frequency adjuster 104 will be adjusted on preset audio gain curve according to comparison result, then audio signal according to
After the audio gain is adjusted, loudspeaker 107 is transferred to after I2S coding module 105 and power amplifier amplification module 106.
Therefore, after increasing above-mentioned feedback device, audio gain regulating device can make each channel audio signal according to ginseng
The audio gain curve and maximal audio amplitude of examining channel presetting adjust the audio gain in each channel respectively, are compiled with realizing through I2S
The maximal audio amplitude of the audio signal of code is identical, according to the sound of the audio gain input power amplifier after adjusting under channels different in this way
Frequency signal amplitude is also identical, therefore can input under identical volume to avoid user in the prior art, and unlike signal channel inputs width
When spending identical audio signal, output audio signal amplitude is caused to change since code encoding/decoding mode is different, in this way the output sound
The maximal audio amplitude of frequency signal, which also changes, causes output sound jumping phenomenon occur.
Embodiment one
The embodiment of the present invention one provides a kind of audio gain Automatic adjustment method, as shown in Figure 2, comprising:
Step 201, the audio signal based on target input channel, sampling obtain the audio signal in volume reference point
Maximal audio amplitude.
Specifically, before this step, the audio gain curve in Pre-set reference channel first in tone control, confirmation
Loudspeaker output power reaches expected performance number.Then the input signal of reference channel is received, and input signal is solved
Code obtains the audio signal of reference channel, and the signal after coding is transmitted to tone control.Tone control is according to preset
The gain of decoded audio signal is adjusted in audio gain curve, then sends sampling for the audio signal after adjusting
And I2S coding module.Before being transferred to power amplifier module with I2S agreement, using I2S clock as clock, to encoded audio
Signal carries out I2S parsing, obtains digitized audio data, then obtains the maximal audio of reference channel according to the audio data
Amplitude, and the maximal audio amplitude is stored in memory module EEPROM.
It is exemplary, according to the audio data for the reference channel that parsing obtains, reference channel can be obtained with employing mode one
All maximal audio amplitudes, i.e., the point on the basis of user's volume 0,25,50,75,100, acquiring user's volume in a period of time is 0
When audio data amplitude, by gradually comparing to obtain maximal audio amplitude when user's volume is 0, and successively obtain user's sound
Then maximal audio amplitude when amount is 25,50,75,100 draws reference channel maximum according to above 5 maximal audio amplitudes
The relation curve of audio amplitude and user's volume, and the curve is stored in memory module EEPROM.
It is exemplary, according to the audio data for the reference channel that parsing obtains, reference channel can be obtained with employing mode two
Maximal audio amplitude, i.e., acquisition a period of time in user's volume be 0 when audio data amplitude, used by gradually comparing
Maximal audio amplitude when family volume is 0, and maximal audio amplitude when user's volume is 1 ~ 100 is successively obtained, it then will be upper
It states in 101 maximal audio amplitude deposit memory module EEPROM.
Specifically, in this step, receiving the input signal of target input channel first, and input signal is decoded
The audio signal of target input channel is obtained, by the audio signal transmission to tone control.Tone control is according to preset
The audio signal is adjusted in audio gain curve, and by the audio signal transmission after adjusting to sampling and I2S coding module.
Since electronic equipment has different signal sources, including analog audio signal and digital audio and video signals, it is therefore desirable to judge target
What input channel was inputted is digital audio and video signals or analog audio signal, and what it is when the input of target input channel is analogue audio frequency
When signal, need to carry out I2S coding after ADC is converted；When input be digital audio and video signals when, will directly carry out I2S coding.
Either analog audio signal or digital audio and video signals all will before being transferred to power amplifier module with I2S agreement, with
I2Sclock carries out I2S parsing as clock, to the audio signal of the target input channel after coding, obtains digitized audio
Then data acquire the amplitude of the audio data of target input channel under volume reference point in a period of time, by gradually comparing
Obtain the maximal audio amplitude of target input channel under volume reference point.
Step 202, the maximal audio amplitude based on the obtained audio signal of sampling under the volume reference point, with
Maximal audio amplitude com parison of the Pre-set reference channel under the volume reference point leads to as a result, adjusting the target input with instruction
The tone control gain of audio channel signal.
Specifically, due to audio gain difference, the maximum sound that audio signal exports therewith when user's volume inputs different value
Frequency amplitude is also different, to need to be compared under same subscriber volume.Therefore the present embodiment is incited somebody to action under volume reference point
The maximal audio amplitude of reference channel is compared with the maximal audio amplitude of target input channel.
Further, when employing mode one obtain reference channel maximal audio amplitude when, if volume reference point be 0,25,
50,75,100 when, can be read directly on the relation curve of stored reference channel maximal audio amplitude and user's volume
State maximal audio amplitude corresponding to volume；Otherwise, on the relation curve for needing first to read maximal audio amplitude and user's volume
With the maximal audio amplitude of immediate two datum marks of volume reference point, then the maximal audio as corresponding to the two datum marks
The maximal audio amplitude of volume reference point is calculated in amplitude, and with target input channel audio signal under volume reference point
Maximal audio amplitude com parison.The relationship that stored reference channel maximal audio amplitude and user's volume can also be directly read is bent
Line, then the maximal audio amplitude of target input channel under volume reference point and the curve are taken in the maximal audio of volume reference point
Amplitude com parison.
Further, when employing mode two obtains the maximal audio amplitude of reference channel, then reference channel is directly read
Maximal audio amplitude under volume reference point, and with the maximal audio amplitude com parison under the volume reference point of target input channel.
Specifically, the reference channel of maximal audio amplitude and storage under the target input channel volume reference point that will acquire
Maximal audio amplitude under volume reference point is compared, if the maximal audio amplitude of target input channel is greater than reference channel
Maximal audio amplitude then reduces gain of the target input channel audio signal in tone control；If target input channel
Maximal audio amplitude is less than the maximal audio amplitude of reference channel, then increases target input channel audio signal in tone control
In gain so that target input channel is identical as maximal audio amplitude of the reference channel under volume reference point, Jin Erli
Target input channel audio signal is adjusted with the audio gain after adjusting, is then successively put again through I2S coding and power amplifier
Output after big.
The embodiment of the invention provides a kind of audio gain Automatic adjustment methods, are increased first according to the preset audio of reference channel
Beneficial curve, then obtains the maximal audio amplitude of reference channel, and is stored in memory module EEPROM, then obtains target input
Maximal audio amplitude under the volume reference point of channel, and compared with the maximal audio amplitude under reference channel volume reference point
Compared with according to gain of the audio signal of comparison result adjusting target input channel in tone control, so that volume refers to
The maximal audio amplitude of target input channel under point is identical as the maximal audio amplitude of reference channel.Therefore unlike signal channel
Audio gain can be adjusted according to the maximal audio amplitude of reference channel, so that the maximum sound of the audio signal through I2S coding
Frequency amplitude is identical, and channels different in this way are identical according to the audio frequency signal amplitude of the audio gain input power amplifier after adjusting, therefore keep away
User in the prior art is exempted to input under identical volume, when the identical audio signal of unlike signal channel input range, solved because compiling
Code mode is different and audio amplitude is caused to change, the maximal audio amplitude of the audio signal exported in this way also change cause it is defeated
There is jumping phenomenon in sound out.
Embodiment two
Second embodiment of the present invention provides a kind of audio gain self-checking devices, as shown in Figure 3, comprising:
Parsing module 301 carries out I2S parsing for the target input channel audio signal after encoding to I2S, obtains described
The audio data of the audio signal of target input channel.
Module 302 is obtained, for the audio signal based on target input channel, sampling obtains the audio signal in volume
The maximal audio amplitude of reference point；
Memory module 303, for storing the maximal audio amplitude of reference channel；
Comparison module 304, maximum sound of the audio signal under the volume reference point for being obtained based on sampling
Frequency amplitude, with maximal audio amplitude com parison result of the Pre-set reference channel under the volume reference point；
Tone control 104, for adjusting the gain of the target input channel audio signal according to comparison result.
Preferably, the acquisition module 302, is also used to:
The amplitude of the audio data of the reference channel audio signal in acquisition a period of time under volume reference point, and by
A comparison obtains the maximal audio amplitude of reference channel under the volume reference point；And
The amplitude of the audio data of the target input channel audio signal in a period of time under volume reference point is acquired,
And compare the maximal audio amplitude for obtaining target input channel under the volume reference point one by one；And
From maximal audio amplitude of the reading reference channel under the volume reference point in memory module.
Preferably, the tone control 104, is specifically used for:
If the maximal audio amplitude of the target input channel audio signal is greater than the reference channel audio signal most
Big audio amplitude then reduces the tone control gain of the target input channel audio signal；
If the maximal audio amplitude of the target input channel audio signal is less than the reference channel audio signal most
Big audio amplitude then increases the tone control gain of the target input channel audio signal.
Preferably, the parsing module, is specifically used for:
I2S parsing is carried out to the reference channel audio signal after I2S coding, obtains the audio signal of the reference channel
Audio data.
Preferably, the audio gain self-checking device, further includes:
Each channel signal input module 101, for inputting reference channel and the target input from different signal source is led to
The audio signal of the same amplitude in road；
Audio decoder module 102, the signal for inputting different channels carry out audio decoder respectively, obtain under each channel
Audio signal；
User's volume input module 103, for inputting user's volume；
Sampling and I2S coding module 105, for being converted into digital audio and video signals for analog audio signal is sampled, then into
Row I2S coding；Digital audio and video signals are directly subjected to I2S coding；
Power amplifier module 106, for loudspeaker will to be output to after the amplification of the audio signal after adjusting；
Loudspeaker 107 is used for output audio signal.
Specifically, first in tone control 104 Pre-set reference channel audio gain curve, then referring to channel
After signal is inputted by each channel signal input module 101, audio signal is obtained through the decoding of audio decoder module 102, and transmit
To tone control 104.Tone control 104 is adjusted the audio signal according to preset gain curve, and by its
It is transferred to sampling and I2S coding module 105.In sampling and I2S coding module 105, need to judge the audio signal for number
Word audio signal or analog audio signal then need to carry out I2S coding again after sampling if analog audio signal, if number
Audio signal then directly carries out I2S coding.Audio signal after coding enters I2S parsing module 301, parses to obtain by I2S
The audio data of the audio signal.
Exemplary, the amplitude of audio data when user's volume is 0 in a period of time can be acquired by obtaining module 302, be passed through
Gradually compare to obtain maximal audio amplitude when user's volume is 0, and successively obtains when user's volume is 25,50,75,100
Then maximal audio amplitude draws reference channel maximal audio amplitude and user's volume according to above 5 maximal audio amplitudes
Relation curve, and the curve is stored in memory module EEPROM.
Exemplary, the amplitude of audio data when user's volume is 0 in a period of time can also be acquired by obtaining module 302, be led to
The maximal audio amplitude for gradually comparing to obtain when user's volume is 0 is crossed, and successively obtains maximum sound when user's volume is 1 ~ 100
Then above-mentioned 101 maximal audio amplitudes are stored in memory module EEPROM by frequency amplitude.
Further, after the signal of target input channel is inputted by each channel signal input module 101, with reference channel
Signal is the same, by audio decoder module 102, tone control 104, sampling and I2S coding module 105, I2S parsing module
301 and obtain module 302 after, finally obtain the maximal audio amplitude under volume reference point.Then obtaining module 302 will be from depositing
The maximal audio amplitude for reading reference channel under volume reference point in module 303 is stored up, and is referred in comparison module 304 with volume
The maximal audio amplitude of the lower target input channel of point is compared, if the maximal audio amplitude of target input channel is greater than with reference to logical
The maximal audio amplitude in road, then reduce the audio gain of target input channel；If the maximal audio amplitude of target input channel is small
In the maximal audio amplitude of reference channel, then increase the audio gain of target input channel.After tone control 104 is according to adjusting
Audio gain the audio signal of target input channel is adjusted.Audio signal after adjusting is sampled and I2S encodes mould
To power amplifier module 106, power amplifier module 106 exports after amplifying to audio signal through loudspeaker 107 coded transmission of block 105.
It is preset in tone control 104 first the embodiment of the invention provides a kind of audio gain self-checking device
Then the audio gain curve of reference channel obtains module 302 and first obtains the maximal audio amplitude of reference channel, and is stored in
It stores up in module EEPROM303, then obtains the maximal audio amplitude under target input channel volume reference point, and in comparison module
It is compared in 304 with the maximal audio amplitude under reference channel volume reference point, tone control 104 can be according to comparison result
The audio gain of target input channel is adjusted, so that the maximal audio amplitude of the target input channel under volume reference point and ginseng
The maximal audio amplitude for examining channel is identical.Therefore unlike signal channel can adjust sound according to the maximal audio amplitude of reference channel
Frequency gain, so that the maximal audio amplitude of the audio signal through I2S coding is identical, channels different in this way are according to the sound after adjusting
The audio frequency signal amplitude that frequency gain inputs power amplifier is identical, therefore avoids user in the prior art and input under identical volume, different
When the identical audio signal of signal path input range, audio amplitude is caused to change because of code encoding/decoding mode difference, output in this way
Audio signal maximal audio amplitude also change cause export sound there is jumping phenomenon.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although the preferred embodiment of the application has been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the application range.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.In this way, if these modifications and variations of the application belong to the range of the claim of this application and its equivalent technologies
Within, then the application is also intended to include these modifications and variations.
Claims (3)
1. a kind of audio gain Automatic adjustment method characterized by comprising
I2S parsing is carried out to reference channel audio signal after I2S coding, obtains the audio number of the reference channel audio signal
According to, the amplitude of the audio data of the reference channel audio signal in acquisition a period of time under volume reference point, and compare one by one
Relatively obtain the maximal audio amplitude of the reference channel under the volume reference point；
Store the maximal audio amplitude of reference channel under the volume reference point；
I2S parsing is carried out to the target input channel audio signal after I2S coding, obtains the target input channel audio signal
Audio data, acquire the width of the audio data of the target input channel audio signal in a period of time under volume reference point
Value, and compare the maximal audio amplitude for obtaining target input channel under the volume reference point one by one；
Based on maximal audio amplitude of the obtained audio signal under the volume reference point is sampled, with Pre-set reference channel
Maximal audio amplitude com parison under the volume reference point is as a result, to indicate to adjust the target input channel audio signal
Tone control gain.
2. the method according to claim 1, wherein in the audio signal obtained based on sampling in institute
The maximal audio amplitude under volume reference point is stated, with maximal audio Amplitude Ration of the Pre-set reference channel under the volume reference point
Compared with as a result, before with the tone control gain of the instruction adjusting target input channel audio signal, comprising:
From maximal audio amplitude of the reading reference channel under the volume reference point in memory module.
3. the method according to claim 1, wherein the audio signal obtained based on sampling is described
Maximal audio amplitude under volume reference point, with maximal audio amplitude com parison of the Pre-set reference channel under the volume reference point
As a result, the tone control gain to indicate the adjusting target input channel audio signal, specifically includes:
By maximal audio amplitude of the target input channel audio signal under volume reference point and reference channel audio signal in institute
The maximal audio amplitude stated under volume reference point is compared；
If the maximal audio amplitude of the target input channel audio signal is greater than the maximum sound of the reference channel audio signal
Frequency amplitude then reduces the tone control gain of the target input channel audio signal；
If the maximal audio amplitude of the target input channel audio signal is less than the maximum sound of the reference channel audio signal
Frequency amplitude then increases the tone control gain of the target input channel audio signal.
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| CN106454646A (en) * | 2016-08-13 | 2017-02-22 | 厦门傅里叶电子有限公司 | Method for synchronizing left and right channels in audio frequency amplifier |
| CN107342092B (en) * | 2017-05-08 | 2020-09-08 | 深圳市创锐智汇科技有限公司 | Audio mixing system and method for automatically distributing gain |
| CN107247574A (en) * | 2017-07-17 | 2017-10-13 | 中科创达软件股份有限公司 | A kind of audio output control method and device |
| CN111767022B (en) * | 2020-06-30 | 2023-08-08 | 成都极米科技股份有限公司 | Audio adjusting method, device, electronic equipment and computer readable storage medium |
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| CN104410379A (en) * | 2014-10-29 | 2015-03-11 | 深圳市金立通信设备有限公司 | A volume adjusting method |
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| CN103716568A (en) * | 2013-12-27 | 2014-04-09 | 乐视致新电子科技（天津）有限公司 | Television volume adjustment method and system |
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