CN110505555A - A kind of acoustics gain regulation method and device based on sound system - Google Patents
A kind of acoustics gain regulation method and device based on sound system Download PDFInfo
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- CN110505555A CN110505555A CN201910811034.1A CN201910811034A CN110505555A CN 110505555 A CN110505555 A CN 110505555A CN 201910811034 A CN201910811034 A CN 201910811034A CN 110505555 A CN110505555 A CN 110505555A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
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Abstract
The embodiment of the present application provides a kind of acoustics gain regulation method and device based on sound system, is related to field of acoustics, including using default detection method as foundation, make a whistling sound in detection of sound system with the presence or absence of sound；When sound howl is not present in sound system, judge whether the acoustics yield value of sound system is less than preset initial yield value；When acoustics yield value is less than initial yield value, detect whether to receive adjustment information；Acoustics yield value is less than initial yield value for showing that sound howl was suppressed in sound system；When detecting adjustment information, acoustics yield value is adjusted according to adjustment information.Implement this embodiment, sound can make a whistling sound in repressed situation in the acoustic system, the effect of adjust automatically audio output, to improve the quality of audio output.
Description
Technical field
This application involves technical field of acoustics, in particular to a kind of acoustics gain regulation side based on sound system
Method and device.
Background technique
Currently, in the acoustic system, the audio signal that loudspeaker plays can be picked up by microphone, and microphone signal is transmitted
It is broadcasted into loudspeaker.In transmission process, when volume is larger or when microphone is closer with loudspeaker distance, sound
Feedback control loop can form positive feedback in certain frequencies, can be amplified step by step in constantly feedback so as to cause sound, thus
Ear-piercing howling is produced, the audio experience of user is seriously affected, therefore, in the application more demanding to sound quality, is needed
Take the measure of chauvent's criterion.
However, it has been found in practice that current chauvent's criterion measure includes the measure inhibited by shift frequency method and leads to
Cross the measure that trapper is inhibited.But utter long and high-pitched sounds be suppressed after sound system often become that mute mouth is noiseless or sound
Discoloration matter reduces so as to cause the audio output effect of sound system.It can be seen that only to uttering long and high-pitched sounds in existing method
Suppressing method, without the method to guarantee higher audio output effect can be adjusted according to the actual situation.
Summary of the invention
The embodiment of the present application is designed to provide a kind of acoustics gain regulation method and device based on sound system, energy
Enough sound in the acoustic system is maked a whistling sound in repressed situation, the effect of adjust automatically audio output, to improve audio output
Quality.
The embodiment of the present application provides a kind of acoustics gain regulation method based on sound system, comprising:
Using default detection method as foundation, detects in the sound system and make a whistling sound with the presence or absence of sound；
When sound howl is not present in the sound system, it is default to judge whether the acoustics yield value of the sound system is less than
Initial yield value；
When the acoustics yield value is less than the initial yield value, detect whether to receive adjustment information；The acoustics
Yield value is less than the initial yield value for showing that sound howl was suppressed in the sound system；
When detecting the adjustment information, the acoustics yield value is adjusted according to the adjustment information.
During above-mentioned realization, can preferentially detect in the sound system (is in site environment with the presence or absence of sound howl
It is no to there is the sound howl that be audible), when making a whistling sound in site environment there is no the sound that can be audible (when can be understood as current
Duan Zhong, sound howl have disappeared or have been suppressed), on this basis, whether the acoustics gain of the further detection of sound system of this method
Less than preset initial yield value, to determine whether to have carried out inhibition processing to sound howl that may be present before, wherein when the sound
When learning gain less than preset initial yield value, it may be said that there is sound before bright really and makes a whistling sound and be processed, and working as should
When acoustics gain is greater than or equal to preset initial yield value, it may be said that may make a whistling sound without sound before bright；Meanwhile in above-mentioned step
Suddenly after making a whistling sound there are sound before determining and is processed, detect whether to receive the adjustment letter for adjusting sound system
Breath, if detecting, adjusting the acoustics yield value in sound system according to adjustment information, (wherein, above-mentioned adjustment information can
Think that the distance between microphone and sound equipment adjust or can be the volume adjustment of sound system)；In above-mentioned acoustics yield value
It can detect whether sound howl occurs after adjustment again, if not occurring also still adjusting according to process sequence, if there is then
The sound howl of appearance is inhibited.It can be seen that above-mentioned process can detect whether that sound howl has occurred in the current situation, such as
Sound howl does not occur for fruit, then judgement is to make a whistling sound or exist before sound there is no sound from beginning to end to make a whistling sound but be inhibited by, and the method exists
There is sound before to make a whistling sound and detect whether to receive volume adjustment information when being suppressed or apart from adjustment information, and above-mentioned receiving
Two kinds of information it is a kind of when be adjusted that (wherein, which is that inhibition sound is maked a whistling sound to the acoustics yield value in sound system
It is adjusted), to realize the method for adjusting acoustics gain according to the actual situation, and then adjusting acoustics gain
On the basis of, it can effectively guarantee higher audio output effect.
Further, the method also includes:
When, there are when sound howl, the sound of the sound system being reduced according to preset the first adjustment parameter in the sound system
Learn yield value.
In the case that this method can make a whistling sound there are still sound in the acoustic system during above-mentioned realization, according to preset
Adjusting parameter reduces the acoustics yield value of sound system, with the generation for inhibiting the sound in sound system to make a whistling sound.As it can be seen that the step can
When sound howl occurs in sound system, sound howl is inhibited, so that the real-time of scene conciliation can be improved in the above method
On the basis of, can also the inhibition of carry out sound howl as the case may be in real time or the release of gain, thereby may be ensured that acoustics gain
Regulation integrality.
Further, described when detecting the adjustment information, the acoustics gain is adjusted according to the adjustment information
The step of value includes:
When detecting the adjustment information, judge whether the adjustment information is volume adjustment information；
When the adjustment information is the volume adjustment information, the audio adjustment that the volume adjustment information includes is judged
Whether amplitude is greater than preset the first adjustment amplitude；
When audio adjustment amplitude is greater than the first adjustment amplitude, include according to the volume adjustment information the
The acoustics yield value is turned up in two adjusting parameters.
During above-mentioned realization, when detecting adjustment information, the type of adjustment information is judged, and in judgement adjustment letter
When the type of breath is volume adjustment information, judge whether volume adjustment amplitude is greater than preset the first adjustment amplitude, if it is greater than
Preset the first adjustment amplitude then illustrates that user effectively adjusts the volume of sound system, and root on this basis
According to preset method of adjustment, acoustics yield value is turned up.As it can be seen that can be according to user to the volume adjustment of sound system in this method
Carry out the adjusting of acoustics yield value, wherein this method is specifically used for when detecting volume change, automatically to adjusting before
Acoustics yield value carry out restorative adjustment, to guarantee the performance of the scene automatic adjustment of the sound system, and then can be real
When guarantee sound system optimal audio output effect.
Further, described when detecting the adjustment information, the acoustics gain is adjusted according to the adjustment information
The step of value includes:
When detecting the adjustment information, judge whether the adjustment information is change in signal strength information；
When the adjustment information is the change in signal strength information, judge that the change in signal strength information includes
Whether change in signal strength amplitude is greater than preset second adjustment amplitude；
When the change in signal strength amplitude is greater than the second adjustment amplitude, according to the change in signal strength information
Including third adjusting parameter the acoustics yield value is turned up.
During above-mentioned realization, when detecting adjustment information, the type of adjustment information is judged, and in judgement adjustment letter
When the type of breath is change in signal strength information, judge whether change in signal strength amplitude is greater than preset second adjustment amplitude,
If it is greater than preset second adjustment amplitude, then illustrate microphone in sound system far from sound equipment, and root on this basis
According to preset method of adjustment, acoustics yield value is turned up.As it can be seen that can be according to the microphone and sound equipment in sound system in this method
The distance between carry out the adjusting of acoustics yield value, thus realize automatically adjusted acoustics yield value before is carried out it is extensive
Renaturation adjustment to guarantee the performance of the scene automatic adjustment of the sound system, and then is capable of the best of real-time ensuring sound system
Audio output effect.
Further, the method also includes:
When the adjustment information is not detected, triggering execution is described using default detection method as foundation, detects the sound
The step of making a whistling sound in acoustic system with the presence or absence of sound.
During above-mentioned realization, it is determined that when not detecting any adjustment information, detecting in current environment again is
The step of no howl there are sound.To ensure that, this method can be handled acoustics gain under the premise of scheduled, to protect
The real-time of acoustics gain process in sound system is demonstrate,proved, and then improves the audio output quality of sound effect system.
Further, the default detection method includes detection method based on peak value even-order harmonic power ratio and based on frame
Between peak holding degree detection method.
During above-mentioned realization, to the detection method that sound is maked a whistling sound be detection method based on peak value even-order harmonic power ratio and
The combination method of detection method based on interframe peak holding degree, effect are more preferable than single method, and precision is higher.
Further, the acoustics gain includes acoustic feedback loop gain based on sound system and/or based on sound equipment
The trapper gain of system.
During above-mentioned realization, to the confirmation that the type of acoustics gain carries out, to guarantee that this method can be in acoustics
When the type of gain is any one in above-mentioned two type, the operation of this method is carried out, to guarantee the defeated of sound system
Effect out.
The embodiment of the present application second aspect provides a kind of acoustics gain regulation device based on sound system, described to be based on
The acoustics gain regulation device of sound system includes:
Detection unit, for detecting in the sound system and making a whistling sound with the presence or absence of sound using default detection method as foundation；
Judging unit judges the acoustics gain of the sound system when for making a whistling sound in the sound system there is no sound
Whether value is less than preset initial yield value；
The detection unit is also used to detect whether to receive when the acoustics yield value is less than the initial yield value
To adjustment information；The acoustics yield value is less than the initial yield value for showing that sound is maked a whistling sound suppressed in the sound system
It crosses；
Adjustment unit, for adjusting the acoustics gain according to the adjustment information when detecting the adjustment information
Value.
During above-mentioned realization, being somebody's turn to do the detection unit that the acoustics gain regulation device based on sound system includes can be examined
It makes a whistling sound in acoustic acoustic system with the presence or absence of sound, and determines to judge sound system there are when sound howl in sound system in judging unit
In acoustics yield value whether be less than preset initial yield value, detection unit judges the sound in sound system in judging unit
It when learning yield value less than preset initial yield value, then detects whether to receive adjustment information, last adjustment unit is determining inspection
Survey unit, which detects, is adjusted acoustics yield value when adjustment information.As it can be seen that implementing this embodiment, detection can be passed through
The combination of unit, judging unit and adjustment unit executes the acoustics gain regulation device based on sound system accordingly to touch
The adjustment of acoustics yield value, thus guarantee the method that sound system can adjust according to the actual situation acoustics gain, Jin Er
On the basis of adjusting acoustics gain, it can effectively guarantee higher audio output effect.
The embodiment of the present application third aspect provides a kind of electronic equipment, including memory and processor, the storage
Device is for storing computer program, and the processor runs the computer program so that the computer equipment is executed according to this
Apply for that the acoustics gain based on sound system described in any one of embodiment first aspect regulates and controls method.
The embodiment of the present application fourth aspect provides a kind of computer readable storage medium, is stored with computer program and refers to
It enables, when the computer program instructions are read and run by a processor, executes any one of the embodiment of the present application first aspect
The acoustics gain based on sound system regulates and controls method.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application will make below to required in the embodiment of the present application
Attached drawing is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is the process signal that a kind of acoustics gain based on sound system provided by the embodiments of the present application regulates and controls method
Figure；
Fig. 2 is the process signal that another acoustics gain based on sound system provided by the embodiments of the present application regulates and controls method
Figure；
Fig. 3 is a kind of structural representation of the acoustics gain regulation device based on sound system provided by the embodiments of the present application
Figure；
Fig. 4 is the structural representation of another acoustics gain regulation device based on sound system provided by the embodiments of the present application
Figure；
The stream for the acoustics gain regulation method that Fig. 5 is a kind of acoustics gain provided by the embodiments of the present application when being link gain
Journey schematic diagram；
The acoustics gain that Fig. 6 is a kind of acoustics gain provided by the embodiments of the present application when being trapper gain regulates and controls method
Practical flow diagram；
Fig. 7 is a kind of structural representation of the acoustics gain regulation device based on sound system provided by the embodiments of the present application
Figure.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application is described.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile the application's
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
Embodiment 1
Please refer to Fig. 1, Fig. 1 provides a kind of acoustics gain based on sound system for the embodiment of the present application and regulates and controls method
Flow diagram.This based on sound system acoustics gain regulation be applied to there may be any sound systems that sound is maked a whistling sound, and
The adjustment of sound howl acoustics yield value in real-time perfoming sound system there may be in the case where, to guarantee sound system output effect
Fruit.Wherein, should include: based on the acoustics gain regulation method of sound system
S101, using default detection method as foundation, make a whistling sound in detection of sound system with the presence or absence of sound, and if it exists, then terminate this
Process；If it does not exist, S102 is thened follow the steps.
In the present embodiment, default detection method includes detection method based on peak value even-order harmonic power ratio and based on interframe
The detection method of peak holding degree.
In the present embodiment, whether the step is for being formed with the acoustic feedback uttered long and high-pitched sounds in detection of sound system, wherein works as letter
When number cutting top distortion, existing detection method not can determine that generations of uttering long and high-pitched sounds, and it is humorous therefore, in the present embodiment to pass through peak value even
Wave power ratio (PEHPR, Peak-to-Even Harmonic Power Ratio) and interframe peak holding degree (IPMP,
Interframe Peak Magnitude Persistence) two conditions carry out detection of uttering long and high-pitched sounds.
In the present embodiment, PEHPR can be defined as following expressions:
In above-mentioned expression formula, X (wk, i) and indicate that the i-th frame signal is uttered long and high-pitched sounds frequency point w in candidatekThe power at place, X (mwk, i) and it indicates
I-th frame signal is uttered long and high-pitched sounds frequency point w in candidatekM subharmonic at power, XHIndicate that m m ∈ { 0.5,2,4 } of current frame signal is humorous
Power spectrum mean value at wave.If current frame signal is uttered long and high-pitched sounds power X (w at frequency point in candidatek, i) with m subharmonic at power spectrum
The ratio between mean value is greater than detection threshold value, i.e. PEHPR (wk, i, m) and >=T, then determine to produce to utter long and high-pitched sounds.Wherein, used in this method
Principle are as follows: audio of uttering long and high-pitched sounds there is no cut top distortion when there is no harmonic component, and cut top distortion after only have odd harmonic and
There is no even-order harmonic, however normal audio signal then has even-order harmonic component abundant, so being uttered long and high-pitched sounds frequently by counting candidate
Point power and the ratio of its m subharmonic power summation are uttered long and high-pitched sounds to determine whether to produce.
In the present embodiment, IPMP can be defined as following expressions:
This method can use above-mentioned conceptual description, and the principle of this method compares normal voice based on ingredient of uttering long and high-pitched sounds
Signal has longer duration of peak value, therefore can count in N frame signal, utters long and high-pitched sounds frequency point acquirement power spectrum in candidate
The number of peak value, if being more than certain number, judgement, which produces, utters long and high-pitched sounds.
In the present embodiment, two kinds of detection methods of above-mentioned joint PEHPR and IPMP utter long and high-pitched sounds the method for detection can be
Both above-mentioned determine simultaneously is uttered long and high-pitched sounds when generating, and judgement is uttered long and high-pitched sounds certain generation, and the candidate frequency point for the condition that meets can be determined
Justice is frequency point of uttering long and high-pitched sounds.
As an alternative embodiment, whether there is sound in detection of sound system using default detection method as foundation
The method of howl may include:
It is foundation according to two kinds of detection methods of PEHPR and IPMP, makes a whistling sound in detection of sound system with the presence or absence of sound.
Implement this embodiment, the detection accuracy of sound howl can be improved.
As a kind of further alternative embodiment, using default detection method as foundation, in detection of sound system whether
There are sound make a whistling sound method may include:
It makes a whistling sound according to whether there is sound in the detection method detection of sound system of PEHPR, and is examined according to the detection method of IPMP
It makes a whistling sound in acoustic acoustic system with the presence or absence of sound；
If the testing result of PEHPR be sound make a whistling sound it is existing as a result, and IPMP testing result be sound make a whistling sound existing result when,
Terminate this process, if not meeting above-mentioned as a result, thening follow the steps S102.
Implement this embodiment, the detection accuracy of sound howl can be improved.
As an alternative embodiment, whether there is sound in detection of sound system using default detection method as foundation
The step of howl may include:
After preset time period, using default detection method as foundation, make a whistling sound in detection of sound system with the presence or absence of sound.
Implement this embodiment, the frequency of this method execution can be limited, to reduce the burden of this method realization, mentions
The precision that high this method is realized (the reason for this is that too fast detection will lead to, variation is too small, and precision is not high).
In the present embodiment, preset time period can be by artificial adjustment, to not being limited in any way in this present embodiment.
S102, judge whether the acoustics yield value of sound system is less than preset initial yield value, if so, thening follow the steps
S103；If it is not, then terminating this process.
In the present embodiment, acoustics gain includes acoustic feedback loop gain based on sound system and/or based on sound equipment system
The trapper gain of system.
In the present embodiment, the acoustics yield value of sound system can be the acoustic feedback loop gain of sound equipment, i.e. sound equipment
The link gain of system.Wherein, which is used to improve link (or be loop), and is making a whistling sound with sound
When, which can be to avoid the generation of sound howl.
In the present embodiment, the acoustics gain of sound system may be the trapper gain based on sound system, wherein
The trapper gain is for indicating that each frequency point trapper starts generated gain effect.Specifically, it is to be understood that when falling into
When wave device is used, trapper generates negative gain, so as to cause gain decline, that is to say, that when using trapper, and
Gain is negative, and illustrates that trapper is used, that is to say, bright, there are the trapper that inhibition sound is maked a whistling sound, wherein trapper gain and traps
The current trap effect of device is also related.
In the present embodiment, trapper gain can be configured when in use, specifically, detecting generation of uttering long and high-pitched sounds
In the case where, frequency point of uttering long and high-pitched sounds is detected, and increase the frequency point trapper of the frequency point there is no when trapper in the frequency point of uttering long and high-pitched sounds, and
Trap is carried out, to reduce trapper gain.
In the present embodiment, initial yield value can be zero.Wherein, when which can be understood as gain and does not generate
Gain standard.Also, the initial yield value is all effective to any acoustics gain.
In the present embodiment, initial yield value can be set or be changed as the case may be.
S103, it detects whether to receive adjustment information, if so, thening follow the steps S104；If it is not, then terminating this process.
In the present embodiment, acoustics yield value is less than initial yield value for showing that sound howl was suppressed in sound system.
In the present embodiment, adjustment information may include volume adjustment information and signal intensity adjustment information, wherein volume tune
The information that whole information generates when being to the adjustment of volume, and signal strength adjustment information can be understood as microphone and sound equipment it
Between there are the information generated when shift transformation.
S104, acoustics yield value is adjusted according to adjustment information.
In the present embodiment, adjustment information includes at least the amplitude of adjustment and the type of adjustment.
As an alternative embodiment, the step of adjusting acoustics yield value according to adjustment information may include:
Acoustics yield value is adjusted according to the adjustment amplitude that adjustment information includes.
Implement this embodiment, the adjustment benchmark of acoustics yield value can be limited, to improve the tune of acoustics yield value
Whole precision.
It can should be sound system sheet based on the executing subject of the acoustics gain regulation method of sound system in the present embodiment
Body, either can be control device or processing unit (such as processor or remote sensing control device) based on the sound system,
To not being limited in any way in this present embodiment.
As it can be seen that implementing the described acoustics gain based on sound system of Fig. 1 regulates and controls method, can examine in the current situation
Survey whether have occurred sound howl, if do not occur sound howl, judgement be from beginning to end there is no sound make a whistling sound or exist before sound make a whistling sound but
It is to be inhibited by, make a whistling sound and while being suppressed detect whether receive volume adjustment information or apart from adjustment existing before by sound for the method
Information, and receive above two information it is a kind of when (wherein, sound is adjusted to the acoustics yield value in sound system
Yield value is that the howl of inhibition sound is adjusted), to realize the method for adjusting acoustics gain according to the actual situation, in turn
On the basis of adjusting acoustics gain, it can effectively guarantee higher audio output effect.
Embodiment 2
Fig. 2 is please referred to, Fig. 2 is that another acoustics gain based on sound system provided by the embodiments of the present application regulates and controls method
Flow diagram.The flow diagram of the described acoustics gain regulation method based on sound system of Fig. 2 is according to Fig. 1 institute
What the flow diagram of the acoustics gain regulation method based on sound system of description improved.Wherein, sound should be based on
The acoustics gain of acoustic system regulates and controls method
S201, using default detection method as foundation, make a whistling sound in detection of sound system with the presence or absence of sound, and if it exists, then execute step
Rapid S210；If it does not exist, S202 is thened follow the steps.
In the present embodiment, default detection method includes detection method based on peak value even-order harmonic power ratio and based on interframe
The detection method of peak holding degree.
In the present embodiment, default detection method includes detection method based on peak value even-order harmonic power ratio and based on interframe
The detection method of peak holding degree.
In the present embodiment, whether the step is for being formed with the acoustic feedback uttered long and high-pitched sounds in detection of sound system, wherein works as letter
When number cutting top distortion, existing detection method not can determine that generations of uttering long and high-pitched sounds, and it is humorous therefore, in the present embodiment to pass through peak value even
Wave power ratio (PEHPR, Peak-to-Even Harmonic Power Ratio) and interframe peak holding degree (IPMP,
Interframe Peak Magnitude Persistence) two conditions carry out detection of uttering long and high-pitched sounds.
In the present embodiment, PEHPR can be defined as following expressions:
In above-mentioned expression formula, X (wk, i) and indicate that the i-th frame signal is uttered long and high-pitched sounds frequency point w in candidatekThe power at place, X (mwk, i) and it indicates
I-th frame signal is uttered long and high-pitched sounds frequency point w in candidatekM subharmonic at power, XHIndicate that m m ∈ { 0.5,2,4 } of current frame signal is humorous
Power spectrum mean value at wave.If current frame signal is uttered long and high-pitched sounds power X (w at frequency point in candidatek, i) with m subharmonic at power spectrum
The ratio between mean value is greater than detection threshold value, i.e. PEHPR (wk, i, m) and >=T, then determine to produce to utter long and high-pitched sounds.Wherein, used in this method
Principle are as follows: audio of uttering long and high-pitched sounds there is no cut top distortion when there is no harmonic component, and cut top distortion after only have odd harmonic and
There is no even-order harmonic, however normal audio signal then has even-order harmonic component abundant, so being uttered long and high-pitched sounds frequently by counting candidate
Point power and the ratio of its m subharmonic power summation are uttered long and high-pitched sounds to determine whether to produce.
In the present embodiment, IPMP can be defined as following expressions:
This method can use above-mentioned conceptual description, and the principle of this method compares normal voice based on ingredient of uttering long and high-pitched sounds
Signal has longer duration of peak value, therefore can count in N frame signal, utters long and high-pitched sounds frequency point acquirement power spectrum in candidate
The number of peak value, if being more than certain number, judgement, which produces, utters long and high-pitched sounds.
In the present embodiment, two kinds of detection methods of above-mentioned joint PEHPR and IPMP utter long and high-pitched sounds the method for detection can be
Both above-mentioned determine simultaneously is uttered long and high-pitched sounds when generating, and judgement is uttered long and high-pitched sounds certain generation, and the candidate frequency point for the condition that meets can be determined
Justice is frequency point of uttering long and high-pitched sounds.
As an alternative embodiment, whether there is sound in detection of sound system using default detection method as foundation
The method of howl may include:
It is foundation according to two kinds of detection methods of PEHPR and IPMP, makes a whistling sound in detection of sound system with the presence or absence of sound.
Implement this embodiment, the detection accuracy of sound howl can be improved.
As a kind of further alternative embodiment, using default detection method as foundation, in detection of sound system whether
There are sound make a whistling sound method may include:
It makes a whistling sound according to whether there is sound in the detection method detection of sound system of PEHPR, and is examined according to the detection method of IPMP
It makes a whistling sound in acoustic acoustic system with the presence or absence of sound；
If the testing result of PEHPR be sound make a whistling sound it is existing as a result, and IPMP testing result be sound make a whistling sound existing result when,
Terminate this process, if not meeting above-mentioned as a result, thening follow the steps S202.
Implement this embodiment, the detection accuracy of sound howl can be improved.
As an alternative embodiment, whether there is sound in detection of sound system using default detection method as foundation
The step of howl may include:
After preset time period, using default detection method as foundation, make a whistling sound in detection of sound system with the presence or absence of sound.
Implement this embodiment, the frequency of this method execution can be limited, to reduce the burden of this method realization, mentions
The precision that high this method is realized (the reason for this is that too fast detection will lead to, variation is too small, and precision is not high).
In the present embodiment, preset time period can be by artificial adjustment, to not being limited in any way in this present embodiment.
S202, judge whether the acoustics yield value of sound system is less than preset initial yield value, if so, thening follow the steps
S203；If it is not, then terminating this process.
In the present embodiment, acoustics yield value is less than initial yield value for showing that sound howl was suppressed in sound system.
In the present embodiment, acoustics gain includes acoustic feedback loop gain based on sound system and/or based on sound equipment system
The trapper gain of system.
In the present embodiment, the acoustics yield value of sound system can be the acoustic feedback loop gain of sound equipment, i.e. sound equipment
The link gain of system.Wherein, which is used to improve link (or be loop), and is making a whistling sound with sound
When, which can be to avoid the generation of sound howl.
In the present embodiment, the acoustics gain of sound system may be the trapper gain based on sound system, wherein
The trapper gain is for indicating that each frequency point trapper starts generated gain effect.Specifically, it is to be understood that when falling into
When wave device is used, trapper generates negative gain, so as to cause gain decline, that is to say, that when using trapper, and
Gain is negative, and illustrates that trapper is used, that is to say, bright, there are the trapper that inhibition sound is maked a whistling sound, wherein trapper gain and traps
The current trap effect of device is also related.
In the present embodiment, trapper gain can be configured when in use, specifically, detecting generation of uttering long and high-pitched sounds
In the case where, frequency point of uttering long and high-pitched sounds is detected, and increase the frequency point trapper of the frequency point there is no when trapper in the frequency point of uttering long and high-pitched sounds, and
Trap is carried out, to reduce trapper gain.
In the present embodiment, initial yield value can be zero.Wherein, when which can be understood as gain and does not generate
Gain standard.Also, the initial yield value is all effective to any acoustics gain.
In the present embodiment, initial yield value can be set or be changed as the case may be.
S203, it detects whether to receive adjustment information, if so, thening follow the steps S204；If it is not, thening follow the steps S201.
In the present embodiment, adjustment information may include volume adjustment information and signal intensity adjustment information, wherein volume tune
The information that whole information generates when being to the adjustment of volume, and signal strength adjustment information can be understood as microphone and sound equipment it
Between there are the information generated when shift transformation.
In the present embodiment, when not receiving adjustment information, can wait for a period of time to trigger again executes step S201.It is real
This embodiment is applied, the control accuracy of acoustics gain can be improved, improving the output effect of sound system, (reason can refer to reality
Apply the description section in example 1 to preset time).
S204, judge whether adjustment information is volume adjustment information, if so, thening follow the steps S205；If it is not, then executing step
Rapid S207.
In the present embodiment, judgment method is not limited in any way, including but not limited to the volume of detection adjustment information
Standard used by code mode, information etc..
Whether S205, the audio adjustment amplitude for judging that volume adjustment information includes are greater than preset the first adjustment amplitude, if
It is to then follow the steps S206；If it is not, then terminating this process.
In the present embodiment, audio adjustment amplitude can be understood as the size of volume adjustment.
In the present embodiment, whether the first adjustment amplitude is effective for detecting audio adjustment amplitude.
As an alternative embodiment, the audio adjustment amplitude for including in volume adjustment information is no more than preset the
When one adjustment amplitude, this method further include:
Acoustics yield value is adjusted to initial yield value.
Implement this embodiment, a kind of resetting means of acoustics yield value can be provided, so that improvement method is comprehensive
Property, guarantee sound howl can not needed to inhibit with manual operation when artificial determining sound howl is not present, and be adjusted.
S206, acoustics yield value is turned up according to the second adjustment parameter that volume adjustment information includes, and terminates this process.
In the present embodiment, second adjustment parameter can be understood as the adjustment requirement to acoustics yield value.
S207, judge whether adjustment information is change in signal strength information, if so, thening follow the steps S208；If it is not, then tying
This process of beam.
In the present embodiment, signal strength (RSSI) can the calculating when wireless receiver is demodulated, for determining link
Quality, and the signal strength or weakness by receiving can measure launch point at a distance from receiving point.When base band demodulating, connect by base band
After receiving filter, baseband I Q power integral is carried out in 104us and obtains the instantaneous value of RSSI, i.e. RSSI (instantaneous)=sum (I^
2+Q^2)；Then the average value of RSSI, i.e. RSSI (average) are averagely obtained to the instantaneous value of 8192 RSSI in about 1 second
=sum (RSSI (instantaneous))/8192.Wherein, above-mentioned RSSI (average) can be used for judging the transformation of interior signal strength per second.
In the present embodiment, judgment method is not limited in any way.
Whether S208, the change in signal strength amplitude for judging that change in signal strength information includes are greater than preset second adjustment
Amplitude, if so, thening follow the steps S209；If it is not, then terminating this process.
As an alternative embodiment, being not more than in the change in signal strength amplitude that change in signal strength information includes
When preset second adjustment amplitude, this method further include:
Acoustics yield value is adjusted to initial yield value.
Implement this embodiment, a kind of resetting means of acoustics yield value can be provided, so that improvement method is comprehensive
Property, guarantee sound howl can not needed to inhibit with manual operation when artificial determining sound howl is not present, and be adjusted.
S209, acoustics yield value is turned up according to the third adjusting parameter that change in signal strength information includes, and terminates this stream
Journey.
In the present embodiment, third adjusting parameter can be understood as the adjustment requirement to acoustics yield value.
S210, the acoustics yield value that sound system is reduced according to preset the first adjustment parameter.
In the present embodiment, the first adjustment parameter can be understood as the adjustment requirement inhibited to acoustics yield value of making a whistling sound based on sound.
For example, it may refer to Fig. 5, Fig. 5 is a kind of acoustics gain provided by the embodiments of the present application when being link gain
Acoustics gain regulation method flow diagram.Preferentially judge to utter long and high-pitched sounds whether occur in this method as shown in Figure 5, and is uttering long and high-pitched sounds
When not occurring, judge in sound system whether to include gain adjustment because of generation of uttering long and high-pitched sounds, wherein sound howl can be since volume increases
What big or microphone and sound equipment caused after；In this method in the presence of detecting that sound is maked a whistling sound, link gain is lowered, under
Tune amount be can be dG0, the dG0It can be used as module parameter to be configured, be configured to 1dB~3dB, so as to increase loop
Benefit is limited in the range of will not uttering long and high-pitched sounds；If when the case where link gain being limited (G < 0dB), volume is lowered dG1,
The limitation to loop gain can be discharged at this time, G is raised, and up-regulation amount is dG1(second adjustment parameter), dG1It can be used as mould
Block parameter is configured, and 1dB~3d is configured to；If the distance of RSSI instruction transmitting terminal and receiving end becomes larger, release can also be
Limitation to link gain, G is raised, and up-regulation amount is dG2(third adjusting parameter), dG2It can be used as module parameter to be matched
It sets, is configured to 1dB~3dB.Dynamic control method in this way can make loop gain be maintained at the phase that sound howl will not occur
To stable state.It is needed one section of gain retention time (above-mentioned preset time) after each gain adjustment, wait loop is stablized, In
Gain remains unchanged in this time.
In the present embodiment, it may refer to Fig. 6 to be a kind of acoustics gain provided by the embodiments of the present application when being trapper gain
Acoustics gain regulation method practical flow diagram, acoustics gain be trapper gain when, this method is referred to Fig. 6
Process and the example above be illustrated.
For example, when acoustics gain is trapper gain, trapper gain can become trapper depth.Wherein,
It is N that trapper number can be set in practice, and trapper depth can automatically adjust, if some frequency point is uttered long and high-pitched sounds, such as
Not yet there is the frequency point trapper in fruit, be the frequency of the frequency point of uttering long and high-pitched sounds by trapper frequency configuration, and trapper depth is set as-dG0,
Otherwise the trapper depth for adjusting the already existing frequency point of uttering long and high-pitched sounds, lowers dG on the basis of the original0If volume down or
Person RSSI is reduced, then all trapper depth up-regulations, upper timing are no more than 0dB.
As it can be seen that implementing the described acoustics gain based on sound system of Fig. 2 regulates and controls method, can examine in the current situation
Survey whether have occurred sound howl, if do not occur sound howl, judgement be from beginning to end there is no sound make a whistling sound or exist before sound make a whistling sound but
It is to be inhibited by, make a whistling sound and while being suppressed detect whether receive volume adjustment information or apart from adjustment existing before by sound for the method
Information, and receive above two information it is a kind of when (wherein, sound is adjusted to the acoustics yield value in sound system
Yield value is that the howl of inhibition sound is adjusted), to realize the method for adjusting acoustics gain according to the actual situation, in turn
On the basis of adjusting acoustics gain, it can effectively guarantee higher audio output effect.
Embodiment 3
Fig. 3 is please referred to, Fig. 3 is a kind of acoustics gain regulation device based on sound system provided by the embodiments of the present application
Structural schematic diagram.Wherein, being somebody's turn to do the acoustics gain regulation device based on sound system includes:
Detection unit 310, for being maked a whistling sound with the presence or absence of sound in detection of sound system using default detection method as foundation；
Judging unit 320, in the acoustic system there is no sound make a whistling sound when, judge sound system acoustics yield value whether
Less than preset initial yield value；
Detection unit 310 is also used to when acoustics yield value is less than initial yield value, detects whether to receive adjustment letter
Breath；Acoustics yield value is less than initial yield value for showing that sound howl was suppressed in sound system；
Adjustment unit 330, for adjusting acoustics yield value according to adjustment information when detecting adjustment information.
In the present embodiment, the acoustics gain regulation device based on sound system can be quoted to be described in any of the above-described embodiment
Explanation and explanation, to no longer adding to repeat in this present embodiment.
As it can be seen that implementing Fig. 3 described in the acoustics gain regulation device based on sound system, can by detection unit,
The combination of judging unit and adjustment unit makes the acoustics gain regulation device based on sound system execute corresponding acoustics to touch
The adjustment of yield value to guarantee the method that sound system can adjust according to the actual situation acoustics gain, and then is adjusting
On the basis of good acoustics gain, it can effectively guarantee higher audio output effect.
Embodiment 4
Fig. 4 is please referred to, Fig. 4 is another acoustics gain regulation device based on sound system provided by the embodiments of the present application
Structural schematic diagram.The structural schematic diagram of acoustics gain regulation device based on sound system described in Fig. 4 is according to Fig. 3 institute
What the structural schematic diagram of the acoustics gain regulation device based on sound system of description improved.Wherein, sound should be based on
The acoustics gain regulation device of acoustic system includes:
Detection unit 310, for being maked a whistling sound with the presence or absence of sound in detection of sound system using default detection method as foundation；
Judging unit 320, in the acoustic system there is no sound make a whistling sound when, judge sound system acoustics yield value whether
Less than preset initial yield value；
Detection unit 310 is also used to when acoustics yield value is less than initial yield value, detects whether to receive adjustment letter
Breath；Acoustics yield value is less than initial yield value for showing that sound howl was suppressed in sound system；
Adjustment unit 330, for adjusting acoustics yield value according to adjustment information when detecting adjustment information.
As an alternative embodiment, when adjustment unit 330 is also used to have sound howl in the acoustic system, according to pre-
If the first adjustment parameter reduce sound system acoustics yield value.
As an alternative embodiment, adjustment unit 330 may include:
Judgment sub-unit 331, for when detecting adjustment information, judging whether adjustment information is volume adjustment information；
Judgment sub-unit 331 is also used to judge that volume adjustment information includes when adjustment information is volume adjustment information
Whether audio adjustment amplitude is greater than preset the first adjustment amplitude；
Subelement 332 is adjusted, is used for when audio adjustment amplitude is greater than the first adjustment amplitude, according to volume adjustment packet
Acoustics yield value is turned up in the second adjustment parameter included.
As an alternative embodiment, default detection method includes the detection side based on peak value even-order harmonic power ratio
Method and detection method based on interframe peak holding degree.
As an alternative embodiment, acoustics gain include acoustic feedback loop gain based on sound system and/
Or the trapper gain based on sound system.
As an alternative embodiment, adjustment unit 330 may include:
Judgment sub-unit 331 is also used to when detecting adjustment information, judges whether adjustment information is change in signal strength
Information；
Judgment sub-unit 331 is also used to judge that change in signal strength is believed when adjustment information is change in signal strength information
Whether the change in signal strength amplitude that breath includes is greater than preset second adjustment amplitude；
Subelement 332 is adjusted, is also used to when change in signal strength amplitude is greater than second adjustment amplitude, according to signal strength
Acoustics yield value is turned up in the third adjusting parameter that change information includes.
As an alternative embodiment, detection unit 310, is also used to when adjustment information is not detected, triggering inspection
It surveys unit 310 and executes the operation maked a whistling sound in detection of sound system with the presence or absence of sound using default detection method as foundation.
In the present embodiment, the acoustics gain regulation device based on sound system can be quoted to be described in any of the above-described embodiment
Explanation and explanation, to no longer adding to repeat in this present embodiment.
Referring to Fig. 7, the figure is a kind of acoustics gain regulation device based on sound system provided by the embodiments of the present application
Structural schematic diagram.Wherein, which includes that volume adjuster 410 including gain controller or dynamic are fallen into
Adjusting device 420, signal strength detector 430 and the sound howl detector 440 of wave device, wherein in the acoustics gain regulation device
Applied in sound system, sound system further includes demodulator 450, digital analog converter 460 and audio output device 470.
As it can be seen that implement Fig. 4 described in the acoustics gain regulation device based on sound system, can by detection unit,
The combination of judging unit and adjustment unit makes the acoustics gain regulation device based on sound system execute corresponding acoustics to touch
The adjustment of yield value to guarantee the method that sound system can adjust according to the actual situation acoustics gain, and then is adjusting
On the basis of good acoustics gain, it can effectively guarantee higher audio output effect.
The embodiment of the present application provides a kind of electronic equipment, including memory and processor, and the memory is for depositing
Computer program is stored up, the processor runs the computer program so that computer equipment execution is implemented according to the application
Any one of example 1 or embodiment 2 regulate and control method based on the acoustics gain of sound system.
The embodiment of the present application provides a kind of computer readable storage medium, is stored with computer program instructions, described
When computer program instructions are read and run by a processor, executes any one of the embodiment of the present application 1 or embodiment 2 and be based on sound
The acoustics gain of acoustic system regulates and controls method.
In several embodiments provided herein, it should be understood that disclosed device and method can also pass through
Other modes are realized.The apparatus embodiments described above are merely exemplary, for example, flow chart and block diagram in attached drawing
Show the device of multiple embodiments according to the application, the architectural framework in the cards of method and computer program product,
Function and operation.In this regard, each box in flowchart or block diagram can represent the one of a module, section or code
Part, a part of the module, section or code, which includes that one or more is for implementing the specified logical function, to be held
Row instruction.It should also be noted that function marked in the box can also be to be different from some implementations as replacement
The sequence marked in attached drawing occurs.For example, two continuous boxes can actually be basically executed in parallel, they are sometimes
It can execute in the opposite order, this depends on the function involved.It is also noted that every in block diagram and or flow chart
The combination of box in a box and block diagram and or flow chart can use the dedicated base for executing defined function or movement
It realizes, or can realize using a combination of dedicated hardware and computer instructions in the system of hardware.
In addition, each functional module in each embodiment of the application can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
It is stored in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) execute each embodiment the method for the application all or part of the steps.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
The above description is only an example of the present application, the protection scope being not intended to limit this application, for ability
For the technical staff in domain, various changes and changes are possible in this application.Within the spirit and principles of this application, made
Any modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this application.It should also be noted that similar label and
Letter indicates similar terms in following attached drawing, therefore, once it is defined in a certain Xiang Yi attached drawing, then in subsequent attached drawing
In do not need that it is further defined and explained.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Claims (10)
1. a kind of acoustics gain based on sound system regulates and controls method characterized by comprising
Using default detection method as foundation, detects in the sound system and make a whistling sound with the presence or absence of sound；
When sound howl is not present in the sound system, it is preset first to judge whether the acoustics yield value of the sound system is less than
Beginning yield value；
When the acoustics yield value is less than the initial yield value, detect whether to receive adjustment information；The acoustics gain
Value is less than the initial yield value for showing that sound howl was suppressed in the sound system；
When detecting the adjustment information, the acoustics yield value is adjusted according to the adjustment information.
2. the acoustics gain according to claim 1 based on sound system regulates and controls method, which is characterized in that the method is also
Include:
When there are when sound howl, being increased according to the acoustics that preset the first adjustment parameter reduces the sound system in the sound system
Benefit value.
3. the acoustics gain according to claim 1 based on sound system regulates and controls method, which is characterized in that described when detection
When to the adjustment information, the step of adjusting the acoustics yield value according to the adjustment information, includes:
When detecting the adjustment information, judge whether the adjustment information is volume adjustment information；
When the adjustment information is the volume adjustment information, the audio adjustment amplitude that the volume adjustment information includes is judged
Whether preset the first adjustment amplitude is greater than；
When audio adjustment amplitude is greater than the first adjustment amplitude, adjusted according to second that the volume adjustment information includes
The acoustics yield value is turned up in whole parameter.
4. the acoustics gain according to claim 1 based on sound system regulates and controls method, which is characterized in that described when detection
When to the adjustment information, the step of adjusting the acoustics yield value according to the adjustment information, includes:
When detecting the adjustment information, judge whether the adjustment information is change in signal strength information；
When the adjustment information is the change in signal strength information, the signal that the change in signal strength information includes is judged
Whether Strength Changes amplitude is greater than preset second adjustment amplitude；
When the change in signal strength amplitude is greater than the second adjustment amplitude, include according to the change in signal strength information
Third adjusting parameter the acoustics yield value is turned up.
5. the acoustics gain according to claim 1 based on sound system regulates and controls method, which is characterized in that the method is also
Include:
When the adjustment information is not detected, triggering execution is described using default detection method as foundation, detects the sound equipment system
The step of making a whistling sound in system with the presence or absence of sound.
6. the acoustics gain according to claim 1 based on sound system regulates and controls method, which is characterized in that the default inspection
Survey method includes the detection method based on peak value even-order harmonic power ratio and the detection method based on interframe peak holding degree.
7. the acoustics gain according to claim 1 based on sound system regulates and controls method, which is characterized in that the acoustics increases
Benefit includes the acoustic feedback loop gain based on sound system and/or the trapper gain based on sound system.
8. a kind of acoustics gain regulation device based on sound system, which is characterized in that the acoustics based on sound system increases
Beneficial regulation device includes:
Detection unit, for detecting in the sound system and making a whistling sound with the presence or absence of sound using default detection method as foundation；
Judging unit judges that the acoustics yield value of the sound system is when for making a whistling sound in the sound system there is no sound
It is no to be less than preset initial yield value；The acoustics yield value is less than the initial yield value for showing in the sound system
Sound howl was suppressed；
The detection unit is also used to detect whether to receive tune when the acoustics yield value is less than the initial yield value
Whole information；
Adjustment unit, for adjusting the acoustics yield value according to the adjustment information when detecting the adjustment information.
9. a kind of electronic equipment, which is characterized in that the electronic equipment includes memory and processor, and the memory is used for
Computer program is stored, the processor runs the computer program so that the computer equipment is executed according to claim
Acoustics gain described in any one of 1 to 7 based on sound system regulates and controls method.
10. a kind of readable storage medium storing program for executing, which is characterized in that computer program instructions are stored in the read/write memory medium,
When the computer program instructions are read and run by a processor, perform claim requirement 1 to 7 is described in any item to be based on sound equipment
The acoustics gain of system regulates and controls method.
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