CN108810747A - A kind of sound quality optimization method, system, earphone and storage medium - Google Patents
A kind of sound quality optimization method, system, earphone and storage medium Download PDFInfo
- Publication number
- CN108810747A CN108810747A CN201810846601.2A CN201810846601A CN108810747A CN 108810747 A CN108810747 A CN 108810747A CN 201810846601 A CN201810846601 A CN 201810846601A CN 108810747 A CN108810747 A CN 108810747A
- Authority
- CN
- China
- Prior art keywords
- signal
- noise reduction
- useful signal
- compressed
- compensation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- 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
Abstract
The embodiment of the present application provides a kind of sound quality optimization method, system, earphone and storage medium, wherein method includes：The original useful signal for receiving the loud speaker of feedback noise reduction system to be sent into compensates the original useful signal according to the noise reduction of feedback noise reduction system, with useful signal after being compensated；According to predetermined dynamic range, the signal amplitude that the dynamic range is exceeded in useful signal after the compensation is compressed in the dynamic range；Compressed useful signal and the de-noising signal are sent to the loud speaker in the feedback noise reduction system together, to export the useful signal after the de-noising signal feedback noise reduction.In the embodiment of the present application, can avoid due to the signal amplitude after compensation beyond dynamic range and caused by signal cut top distortion, can effectively reduce feedback noise reduction process influences the sound quality of original useful signal.
Description
Technical field
This application involves noise reduction technology field more particularly to a kind of sound quality optimization method, system, earphone and storage mediums.
Background technology
Active noise control technique is mainly the principle of interference that sound wave is utilized, and passes through one and noise signal equivalence reverse phase
De-noising signal offset original noise signal.Based on active noise control technique, noise cancelling headphone can be dropped by feedback thereon
System of making an uproar realizes active noise reduction.
In feedback noise reduction system, microphone is responsible for collected sound signal, and noise filter is by the collected sound of microphone
Sound signal generates de-noising signal corresponding with the noise signal and is played by loud speaker to offset the noise as noise signal
Signal.Further include that noise cancelling headphone is playing but in the collected voice signal of microphone other than comprising ambient noise signal
The useful signal exported by its loud speaker when audio-video signal, therefore, the de-noising signal that noise filter generates are offsetting environment
While noise signal, useful signal can also be offset.
Influenced caused by useful signal to improve de-noising signal, in the prior art, can by balanced device (EQ,
Equalizer) useful signal is compensated, is influenced caused by useful signal with making up de-noising signal.But this mode
Distorted signals can be caused, sound quality is greatly reduced.
Invention content
A kind of sound quality optimization method of many aspects offer, system, earphone and the storage medium of the application, to solve existing skill
The problem of music signal in art during feedback noise reduction caused by compensator compensation is distorted.
The embodiment of the present application provides a kind of sound quality optimization method, including：
The original useful signal for receiving the loud speaker of feedback noise reduction system to be sent into, according to the noise reduction of feedback noise reduction system
The original useful signal is compensated, with useful signal after being compensated；
According to predetermined dynamic range, the signal width of the dynamic range will be exceeded in useful signal after the compensation
Value is compressed in the dynamic range；
Compressed useful signal and the de-noising signal are sent to the loud speaker in the feedback noise reduction system together,
To export the useful signal after the de-noising signal feedback noise reduction.
The embodiment of the present application also provides a kind of sound quality optimization system, is applied to feedback noise reduction earphone, including：Feedback noise reduction system
System, control circuit and compensator；
The feedback noise reduction system generates the de-noising signal needed for feedback noise reduction, and the de-noising signal is sent to it
Loud speaker, the signal to be sent into the loud speaker together to the control circuit by the de-noising signal carry out feedback noise reduction；
The compensator, the original useful signal of the loud speaker for receiving feedback noise reduction system to be sent into, according to described
The noise reduction of feedback noise reduction system compensates the original useful signal, with useful signal after being compensated；
The control circuit is connect with the compensator and the feedback noise reduction system, for according to predetermined dynamic
The signal amplitude for exceeding the dynamic range in useful signal after the compensation is compressed in the dynamic range by state range；
Compressed useful signal is exported to the loud speaker of the feedback noise reduction system, to export by the described original of feedback noise reduction
Useful signal.
The embodiment of the present application also provides a kind of earphone, including sound quality optimization system above-mentioned.
The present embodiment also provides a kind of computer readable storage medium of storage computer instruction, when the computer instruction
When being executed by one or more processors, one or more of processors is caused to execute sound quality optimization method above-mentioned.
In the embodiment of the present application, the original useful letter for needing to export by the loud speaker in feedback noise reduction system
Number, before being exported by loud speaker, first original useful signal is compensated according to the noise reduction of feedback noise reduction system, then
According to predetermined dynamic range, the signal amplitude that the dynamic range is exceeded in the useful signal obtained after compensation is compressed to
It in dynamic range, is exported after feedback noise reduction again later, can avoid making beyond dynamic range due to the signal amplitude after compensation
At signal cut top distortion, can effectively reduce feedback noise reduction process influences the sound quality of original useful signal.
Description of the drawings
Attached drawing described herein is used for providing further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please do not constitute the improper restriction to the application for explaining the application.In the accompanying drawings：
Fig. 1 is a kind of structural schematic diagram for sound quality optimization system that one embodiment of the application provides；
Fig. 2 is a kind of flow diagram for sound quality optimization method that another embodiment of the application provides；
Fig. 3 is a kind of structural schematic diagram for earphone that the another embodiment of the application provides.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under the premise of creative work, shall fall in the protection scope of this application.
In the prior art, it is influenced caused by useful signal to improve de-noising signal, it can be by balanced device to useful letter
It number compensates, is influenced caused by useful signal with making up de-noising signal, still, this mode can cause distorted signals, pole
The earth reduces sound quality.In view of the above-mentioned problems existing in the prior art, the embodiment of the present application provides a solution：To original
After useful signal compensates, it can will exceed dynamic range in useful signal after compensation according to predetermined dynamic range
Signal amplitude is compressed in dynamic range, to can avoid due to the signal amplitude after compensation beyond dynamic range and caused by believe
Top distortion number is cut, this, which effectively reduces feedback noise reduction process, influences the sound quality of original useful signal.
Below in conjunction with attached drawing, the technical solution that each embodiment of the application provides is described in detail.
Fig. 1 is a kind of structural schematic diagram for sound quality optimization system that one embodiment of the application provides.As shown in Figure 1, the sound
Matter optimization system includes：Feedback noise reduction system 10, control circuit 20 and compensator 30；
De-noising signal for generating the de-noising signal needed for feedback noise reduction, and is sent to it and raised by feedback noise reduction system 10
Sound device 12, the signal to be sent into loud speaker 12 together to control circuit 20 by de-noising signal carry out feedback noise reduction；
Compensator 30, the original useful signal of the loud speaker for receiving feedback noise reduction system to be sent into are dropped according to feedback
The noise reduction of system of making an uproar 10 compensates original useful signal, with useful signal after being compensated；
Control circuit 20 is connect with compensator 30 and feedback noise reduction system 10, is used for according to predetermined dynamic range,
The signal amplitude for exceeding dynamic range in useful signal after compensation is compressed in dynamic range；Compressed useful signal is defeated
Go out to the loud speaker 12 of feedback noise reduction system 10, to export the useful signal after de-noising signal feedback noise reduction.
Sound quality optimization system provided in this embodiment can be applied to feedback noise reduction earphone, and feedback noise reduction earphone can be worn
Formula or ear type.Certainly, it can also be applied in other feedback noise reduction scenes, for example, the feedback noise reduction scene etc. in automobile.With
The application scenarios of the lower sound quality optimization system by emphasis using feedback noise reduction earphone (hereinafter referred to as " earphone ") as the present embodiment
It is described.
In an optional embodiment, as shown in Figure 1, feedback noise reduction system 10 may include：Microphone 11,12 and of loud speaker
Noise filter 13.Microphone 11 and loud speaker 12 are set to inside the earmuff of earphone, and microphone 11 is for acquiring inside earmuff
Voice signal, loud speaker 12 is used to play the de-noising signal that useful signal and noise filter 13 generate.For microphone 11
For, collected voice signal is the useful signal that loud speaker 12 plays and enters ambient noise signal shape in earmuff
At mixed signal, which will input noise filter 13, and noise filter 13 will be produced according to the mixed signal
De-noising signal is exported to loud speaker 12 and is played out by a raw de-noising signal corresponding with the mixed signal, noise filter 13.
At human ear, de-noising signal and useful signal that ambient noise signal and loud speaker 12 play will generate sound wave interference.Wherein, it drops
Noise cancellation signal is cancelled out each other with ambient noise signal, and de-noising signal also does the useful signal played with loud speaker 12 generation sound wave
It relates to.Finally, what human ear can be heard will be the useful signal played by the loud speaker 12 after de-noising signal sound wave interference.
It is worth noting that illustrate only the basic structure form of feedback noise reduction system 10 in Fig. 1, but this should not be caused pair
The structure qualification of feedback noise reduction system 10 in the present embodiment.Feedback noise reduction system 10 in the present embodiment can also include other knots
Structure unit, the connection relation between structural unit there are many deformation, can also realize the feedback drop of feedback noise reduction processing function
System of making an uproar 10 should all belong to the scope of protection of the present invention.
For compensator 30, can get the loud speaker of feedback noise reduction system to be sent into original useful signal and
The de-noising signal that feedback noise reduction system 10 generates, compensator 30 can be according to the noise reduction of feedback noise reduction system 10 to original useful letter
It number compensates, with useful signal after being compensated.The noise reduction of feedback noise reduction system 10 can be in feedback noise reduction system 10
Predetermined noise reduction in design process, naturally it is also possible to be the practical noise reduction during feedback noise reduction, the present embodiment pair
This is not construed as limiting.
Wherein, original useful signal refers to that useful signal generator is sent out, and is needed through raising in feedback noise reduction system 10
The audio signal that sound device 12 exports.For different application scenarios, useful signal generator can be different.For example, earphone
When connection computer listens to music, useful signal generator can be computer.In another example when earphone is inserted into the earpiece holes of mobile phone, it is useful
Signal generator can be mobile phone.Certainly, useful signal generator can also be other forms, be waited for as long as can be sent to earphone
The original useful signal played, the present embodiment are not construed as limiting this.In addition, the signal content of original useful signal can also
It is diversified, needs to play to the sound of human ear by earphone for example, it may be music signal, voice signal are either other
Frequency signal, the present embodiment also do not limit this.
According to the de-noising signal that feedback noise reduction system 10 generates, compensator 30 is right by according to the noise reduction in each frequency
Signal amplitude is correspondingly lifted in each frequency of original useful signal.The output of compensator 30 is useful letter after compensation
Number, compared with original useful signal, the signal amplitude on component frequency is lifted useful signal after compensation.Wherein, original useful
The signal degree that signal amplitude is lifted by compensator 30 in each frequency, the de-noising signal generated with feedback noise reduction system 10 is each
Noise reduction in frequency is related.If noise reduction of the de-noising signal that feedback noise reduction system 10 generates in corresponding frequencies or frequency range
It is larger, then it may exceed after signal amplitude of the original useful signal in corresponding frequencies or frequency range is lifted predetermined dynamic
State range.If for example, feedback noise reduction system 10 generate de-noising signal can reach 15dB or more in the noise reduction peak value of low-frequency range,
Predetermined dynamic range may be exceeded after then signal amplitude of the original useful signal in this section in frequency is lifted, and
Once signal amplitude exceeds dynamic range, it will cause signal cuts top distortion, if that is to say, useful signal is directly defeated after compensation
Sound quality may be influenced because cutting top distortion by going out to loud speaker 12.
In this regard, useful signal after compensation is sent to control circuit 20 by compensator 30, and by control circuit 20 to compensation after
Useful signal carries out signal amplitude compression, to ensure that all signal amplitudes of useful signal after compressed compensation are all located in advance
In determining dynamic range, to avoid cutting the transmission of top distortion.Dynamic range can require directly to set according to signal output
Fixed value, can also be according in usage scenario with the original relevant scene unit of useful signal transmission process and the value of determination,
The present embodiment is not construed as limiting this.Wherein, control circuit 20 can basis to the compression degree of the signal amplitude beyond dynamic range
Actual conditions are set, for example, the signal amplitude beyond dynamic range can be compressed to and dynamic range by control circuit 20
Boundary threshold is equal, control circuit 20 signal amplitude beyond dynamic range can be also compressed to the boundary threshold of dynamic range with
Under, the present embodiment is not construed as limiting this.It is worth noting that compression journey of the control circuit 20 to the signal amplitude on different frequency
Degree also can be different.
The de-noising signal generated through 20 compressed useful signal of control circuit and feedback noise reduction system 10 will be defeated together
Go out to the loud speaker 12 in feedback noise reduction system 10, wherein compressed useful signal refers to compressed through control circuit 20
Useful signal after compensation.As previously shown, at human ear, de-noising signal and useful letter that ambient noise signal and loud speaker 12 play
Number it will generate sound wave interference.De-noising signal will cancel out each other with ambient noise signal, and de-noising signal will also be played with loud speaker 12
Compressed useful signal generate sound wave interference, and de-noising signal to compressed useful signal carry out sound wave interference after, will
The compensation that is carried out to original useful signal by compensator is offset, accordingly, what human ear was heard will be useful letter that no sound quality is lost
Number.
In the embodiment of the present application, the original useful letter for needing to export by the loud speaker in feedback noise reduction system
Number, before being exported by loud speaker, first original useful signal is compensated according to the noise reduction of feedback noise reduction system, then
According to predetermined dynamic range, the signal amplitude that the dynamic range is exceeded in the useful signal obtained after compensation is compressed to
It in dynamic range, is exported after feedback noise reduction again later, can not only reduce interference of the noise signal to useful signal, Er Qieke
Signal amplitude after avoiding due to compensation signal caused by beyond dynamic range cuts top distortion, can effectively reduce feedback noise reduction mistake
Journey influences the sound quality of original useful signal.
In above-mentioned or following embodiments, control circuit 20 exceeds the signal of dynamic range after it will compensate in useful signal
When in amplitude compression to dynamic range, it is thus necessary to determine which/a little frequency location on signal amplitude have exceeded it is predetermined dynamic
State range, and signal amplitude is compressed.
In a kind of optional realization method, control circuit 20 can carry out signal inspection to the full frequency band of useful signal after compensation
It surveys, to determine that signal amplitude has exceeded the frequency location of predetermined dynamic range, and signal amplitude is compressed.
In another implementation, control circuit 20 can be determined according to effective noise reduction frequency range of feedback noise reduction system 10
Frequency range to be compressed after compensation in useful signal with the signal frequency range of effective noise reduction frequency band match as useful signal after compensation；It will
The signal amplitude beyond dynamic range is compressed in dynamic range in the frequency range to be compressed of useful signal after compensation.
Wherein, effective noise reduction frequency range of feedback noise reduction system 10 is the noise reduction frequency range for referring to reach default noise reduction requirement.
For example, the noise reduction frequency range for the de-noising signal that feedback noise reduction system 10 generates is 30HZ~2KHZ, preset noise reduction requirement is noise reduction
Amount is not less than 10dB, but the frequency range after 1KHZ, the corresponding noise reduction of noise signal are less than default noise reduction requirement, and,
Frequency range before 50HZ, the corresponding noise reduction of noise signal are required also below default noise reduction, then can determine feedback noise reduction system
10 effective noise reduction frequency range is 50HZ~1KHZ.It is worth noting that effective noise reduction frequency range of feedback noise reduction system 10 can be
It is determined according to experiment when carrying out feedback noise reduction design, it certainly can also be in actual use according to feedback noise reduction system
Practical noise reduction and determine, the present embodiment is not construed as limiting this.
In this realization method, when determining frequency range to be compressed, control circuit 20 can carry out band to useful signal after compensation
Pass filter, wherein the band logical boundary of bandpass filtering is determined according to the boundary value of effective noise reduction frequency range of feedback noise reduction system 10；It will
To be compressed frequency range of the corresponding frequency range of signal as useful signal after compensation after bandpass filtering.Useful signal after compensation is carried out
After bandpass filtering, control circuit 20 need to only carry out the signal after bandpass filtering signal detection, and the signal amplitude that will be detected
To be compressed position of the frequency location beyond dynamic range as useful signal after compensation；It waits pressing according to useful signal after compensation
It condenses and sets, the signal amplitude on the position to be compressed of useful signal after compensation is compressed in dynamic range.
Accordingly, control circuit 20 only need to carry out signal detection to the band segment of useful signal after compensation, this is substantially reduced
The data processing amount of control circuit 20, improves the treatment effeciency of control circuit 20.It is worth noting that due to effectively dropping
Noise reduction except frequency range of making an uproar is usually very small, and accordingly, compensator is carrying out signal according to noise reduction to original useful signal
When amplitude is lifted, the signal amplitude uplift scope on frequency location except effective noise reduction frequency range is also very small.Therefore, this realization
Do not consider whether the amplitude lifting on the frequency location except effective noise reduction frequency range exceeds predetermined dynamic range in mode
It can't cause to cut top distortion, will not be brought a negative impact to sound quality.
Fig. 2 is a kind of flow diagram for sound quality optimization method that another embodiment of the application provides.As shown in Fig. 2, should
Method, including：
200, the original useful signal for receiving the loud speaker of feedback noise reduction system to be sent into, according to the drop of feedback noise reduction system
The amount of making an uproar compensates original useful signal, with useful signal after being compensated；
201, according to predetermined dynamic range, the signal amplitude pressure of dynamic range will be exceeded in useful signal after compensation
It is reduced in dynamic range；
202, the loud speaker being sent to compressed useful signal and de-noising signal together in feedback noise reduction system, with defeated
Go out the useful signal after de-noising signal feedback noise reduction.
Sound quality optimization method provided in this embodiment can be applied to various feedback noise reduction processes and generate sound quality to useful signal
The scene of influence, for example, can be applied to feedback noise reduction earphone scene, the feedback noise reduction scene etc. in automobile, the present embodiment pair
This is not construed as limiting.
Wherein, feedback noise reduction system refers to the structure for providing feedback noise reduction processing, this implementation in various application scenarios
In example, feedback noise reduction system may include：Microphone, loud speaker and noise filter.Microphone and loud speaker are set to earphone
Inside earmuff, microphone is used to acquire the voice signal inside earmuff, and loud speaker is for playing useful signal and noise filter
The de-noising signal of generation.For microphone, collected voice signal is the useful signal and entrance that loud speaker plays
The mixed signal that ambient noise signal in earmuff is formed, the mixed signal will input noise filter, and noise filter
A de-noising signal corresponding with the mixed signal will be generated according to the mixed signal, noise filter by de-noising signal export to
Loud speaker plays out.At human ear, de-noising signal and useful signal that ambient noise signal and loud speaker play will generate sound
Wave interference.Wherein, de-noising signal is cancelled out each other with ambient noise signal, and the useful letter that de-noising signal will also be played with loud speaker
Number generate sound wave interference.Finally, what human ear can be heard will be by the useful of the loud speaker broadcasting after de-noising signal sound wave interference
Signal.
It is worth noting that the present embodiment does not limit the structure type of feedback noise reduction system.Except structure type above-mentioned
Outside, the feedback noise reduction system in the present embodiment can also include other structures unit, and the connection relation between structural unit also may be used
There are many deformations, can realize that the feedback noise reduction system of feedback noise reduction processing function should all belong to the scope of protection of the present invention.
In the present embodiment, first, the original useful signal of the loud speaker of feedback noise reduction system to be sent into and anti-is got
The de-noising signal that noise reduction system generates is presented, and original useful signal is compensated according to the noise reduction of feedback noise reduction system, with
Useful signal after being compensated.The noise reduction of feedback noise reduction system 10 can be advance in 10 design process of feedback noise reduction system
Determining, naturally it is also possible to it is the practical noise reduction during feedback noise reduction, the present embodiment is not construed as limiting this.
Wherein, original useful signal refers to the audio signal that useful signal generator is sent out, and is needed through feedback noise reduction system
The audio signal of loud speaker output in system.For different application scenarios, useful signal generator can be different.Example
Such as, when earphone connection computer listens to music, useful signal generator can be computer.In another example earphone is inserted into the earpiece holes of mobile phone
When, useful signal generator can be mobile phone.Certainly, useful signal generator can also be other forms, as long as can be to ear
Machine sends original useful signal to be played, and the present embodiment is not construed as limiting this.In addition, in the signal of original useful signal
Appearance can also be it is diversified, for example, it may be music signal, voice signal either it is other need by earphone play to
The audio signal of human ear, the present embodiment also do not limit this.
It, can be according to feedback noise reduction system in each frequency in the present embodiment when being compensated to original useful signal
Noise reduction, signal amplitude in each frequency of original useful signal is correspondingly lifted.Useful signal and original after compensation
Beginning useful signal is compared, and the signal amplitude on component frequency is lifted.Wherein, original useful signal signal amplitude in each frequency
The degree being lifted, it is related with noise reduction of the de-noising signal that feedback noise reduction system generates in each frequency.If feedback noise reduction
Noise reduction of the de-noising signal that system generates in corresponding frequencies or frequency range is larger, then original useful signal is in corresponding frequencies or frequency
Signal amplitude in section may exceed predetermined dynamic range after being lifted.For example, what if feedback noise reduction system generated
De-noising signal can reach 15dB or more in the noise reduction peak value of low-frequency range, then the original useful signal signal in frequency in this section
Amplitude be lifted after may exceed predetermined dynamic range, once and signal amplitude exceed dynamic range, it will cause
Signal cuts top distortion, if that is to say, useful signal is directly output to influence sound due to loud speaker may push up distortion because cutting after compensation
Matter.
In this regard, in the present embodiment, signal amplitude compression can be carried out to useful signal after compensation, to ensure compressed compensation
All signal amplitudes of useful signal are all located in predetermined dynamic range afterwards, to avoid cutting the generation of top distortion.It is dynamic
State range can require the value that directly sets according to signal output, can also be according in usage scenario with original useful signal
The relevant scene unit of transmission process and the value of determination, the present embodiment are not construed as limiting this.Wherein, to the letter beyond dynamic range
The compression degree of number amplitude can be set according to actual conditions, for example, can be compressed to the signal amplitude beyond dynamic range
It is equal with the boundary threshold of dynamic range, the signal amplitude beyond dynamic range can be also compressed to the boundary threshold of dynamic range
Hereinafter, the present embodiment is not construed as limiting this.It is worth noting that the compression degree to the signal amplitude on different frequency also can be each
It differs.
The de-noising signal that compressed useful signal and feedback noise reduction system generate will be exported together to feedback noise reduction system
Loud speaker in system, wherein compressed useful signal refers to useful signal after compressed compensation.As previously shown, in human ear
The de-noising signal and useful signal that place, ambient noise signal and loud speaker play will generate sound wave interference.De-noising signal will be with ring
Border noise signal is cancelled out each other, and the compressed useful signal played with loud speaker is also generated sound wave interference by de-noising signal, and
After de-noising signal carries out sound wave interference to compressed useful signal, the benefit carried out to original useful signal by compensator will be offset
Repay, accordingly, human ear heard by be the loss of no sound quality useful signal.
In embodiment, for the original useful signal for needing to export by the loud speaker in feedback noise reduction system, logical
It crosses before loud speaker output, first original useful signal is compensated according to the noise reduction of feedback noise reduction system, then according to pre-
The signal amplitude for exceeding the dynamic range in the useful signal obtained after compensation is compressed to dynamic model by first determining dynamic range
In enclosing, exported after feedback noise reduction again later, can not only reduce interference of the noise signal to useful signal, and can avoid by
Signal amplitude after compensation signal caused by beyond dynamic range cuts top distortion, can effectively reduce feedback noise reduction process to original
The sound quality of beginning useful signal influences.
In above-mentioned or following embodiments, the signal amplitude beyond dynamic range is compressed in useful signal after by compensation
When in dynamic range, it is thus necessary to determine which/a little frequency location on signal amplitude have exceeded predetermined dynamic range, and it is right
Signal amplitude is compressed.
In a kind of optional realization method, signal detection can be carried out to the full frequency band of useful signal after compensation, be believed with determining
Number amplitude has exceeded the frequency location of predetermined dynamic range, and is compressed to signal amplitude.
In another implementation, useful letter after compensation can be determined according to effective noise reduction frequency range of feedback noise reduction system
Frequency range to be compressed in number with the signal frequency range of effective noise reduction frequency band match as useful signal after compensation；Useful letter after compensating
Number frequency range to be compressed in be compressed in dynamic range beyond the signal amplitude of dynamic range.
Wherein, effective noise reduction frequency range of feedback noise reduction system is the noise reduction frequency range for referring to reach default noise reduction requirement.Example
Such as, the noise reduction frequency range for the de-noising signal that feedback noise reduction system generates is 30HZ~2KHZ, preset noise reduction require be noise reduction not
Frequency range less than 10dB, but after 1KHZ, the corresponding noise reduction of noise signal are less than default noise reduction requirement, and,
Frequency range before 50HZ, the corresponding noise reduction of noise signal are required also below default noise reduction, then can determine feedback noise reduction system
Effective noise reduction frequency range is 50HZ~1KHZ.It is worth noting that effective noise reduction frequency range of feedback noise reduction system can carried out
It is determined according to experiment when feedback noise reduction designs, it certainly can also be in actual use according to the reality of feedback noise reduction system
Noise reduction and determine, the present embodiment is not construed as limiting this.
In this realization method, when determining frequency range to be compressed, bandpass filtering can be carried out to useful signal after compensation,
In, the band logical boundary of bandpass filtering is determined according to the boundary value of effective noise reduction frequency range of feedback noise reduction system；After bandpass filtering
The corresponding frequency range of signal as compensation after useful signal frequency range to be compressed.Bandpass filtering is carried out to useful signal after compensation
Afterwards, signal detection need to be only carried out to the signal after bandpass filtering, and the signal amplitude detected is exceeded to the frequency of dynamic range
To be compressed position of the position as useful signal after compensation；According to the position to be compressed of useful signal after compensation, will have after compensation
It is compressed in dynamic range with the signal amplitude on the position to be compressed of signal.
Accordingly, need to only signal detection be carried out to the band segment of useful signal after compensation, this greatly reduces data processing
Amount, improves treatment effeciency.It is worth noting that since the noise reduction except effective noise reduction frequency range is usually very small, it is corresponding
Ground, when carrying out signal amplitude lifting to original useful signal according to noise reduction, on the frequency location except effective noise reduction frequency range
Signal amplitude uplift scope it is also very small.Therefore, the frequency location except effective noise reduction frequency range is not considered in this realization method
On amplitude lifting whether beyond predetermined dynamic range can't cause to cut top distortion, will not be brought to sound quality negatively
It influences.
Fig. 3 is a kind of structural schematic diagram for earphone that the another embodiment of the application provides.As shown in figure 3, the earphone can wrap
Include the sound quality optimization system that aforementioned any embodiment provides.
Wherein, which can be headphone or PlayGear Stealth.
In addition, as shown in figure 3, in addition to sound quality optimization system, earphone provided in this embodiment may also include the structures such as earmuff
Unit.
It is worth noting that Fig. 3 is only the basic system of earphone, but this should not caused to earphone in the present embodiment
Structure qualification, it should be appreciated that the earphone of the sound quality optimization system provided comprising aforementioned any embodiment should all belong to this
The protection domain of invention.
Correspondingly, the embodiment of the present application also provides a kind of computer readable storage medium being stored with computer program, meter
Calculation machine program is performed each step that can be realized and can be executed by sound quality optimization system in above method embodiment.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, the application can be used in one or more wherein include computer usable program code computer
The computer program production implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The application is with reference to method, the flow 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 can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of 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 count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
In a typical configuration, computing device includes one or more processors (CPU), input/output interface, net
Network interface and memory.
Memory may include computer-readable medium in volatile memory, random access memory (RAM) and/or
The forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable medium
Example.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology realizes information storage.Information can be computer-readable instruction, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase transition internal memory (PRAM), static RAM (SRAM), moves
State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable
Programmable read only memory (EEPROM), fast flash memory bank or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM),
Digital versatile disc (DVD) or other optical storages, magnetic tape cassette, tape magnetic disk storage or other magnetic storage apparatus
Or any other non-transmission medium, it can be used for storage and can be accessed by a computing device information.As defined in this article, it calculates
Machine readable medium does not include temporary computer readable media (transitory media), such as data-signal and carrier wave of modulation.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Including so that process, method, commodity or equipment including a series of elements include not only those elements, but also wrap
Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that wanted including described
There is also other identical elements in the process of element, method, commodity or equipment.
It these are only embodiments herein, be not intended to limit this application.To those skilled in the art,
The application can have various modifications and variations.It is all within spirit herein and principle made by any modification, equivalent replacement,
Improve etc., it should be included within the scope of claims hereof.
Claims (10)
1. a kind of sound quality optimization method, which is characterized in that including：
The original useful signal for receiving the loud speaker of feedback noise reduction system to be sent into, according to the noise reduction of the feedback noise reduction system
The original useful signal is compensated, with useful signal after being compensated；
According to predetermined dynamic range, the signal amplitude pressure of the dynamic range will be exceeded in useful signal after the compensation
It is reduced in the dynamic range；
Compressed useful signal and the de-noising signal are sent to the loud speaker in the feedback noise reduction system together, with defeated
Go out the useful signal after the de-noising signal feedback noise reduction.
2. according to the method described in claim 1, it is characterized in that, described according to predetermined dynamic range, by the benefit
The signal amplitude beyond the dynamic range in rear useful signal is repaid to be compressed in the dynamic range, including：
According to effective noise reduction frequency range of the feedback noise reduction system, determine after the compensation in useful signal with effective noise reduction
To be compressed frequency range of the signal frequency range of frequency band match as useful signal after the compensation；
The signal amplitude for exceeding the dynamic range in the frequency range to be compressed of useful signal after the compensation is compressed to described dynamic
Within the scope of state.
3. according to the method described in claim 2, it is characterized in that, effective noise reduction frequency according to the feedback noise reduction system
Section determines after the compensation in useful signal with the signal frequency range of effective noise reduction frequency band match as useful after the compensation
The frequency range to be compressed of signal, including：
Bandpass filtering is carried out to useful signal after the compensation, wherein the band logical boundary of bandpass filtering is according to the feedback noise reduction
The boundary value of effective noise reduction frequency range of system determines；
Using the corresponding frequency range of the signal after bandpass filtering as the frequency range to be compressed of useful signal after the compensation.
4. according to the method in claim 2 or 3, which is characterized in that it is described by after the compensation useful signal it is to be compressed
The signal amplitude beyond the dynamic range is compressed in the dynamic range in frequency range, including：
Signal detection is carried out to the signal after the bandpass filtering, and the signal amplitude detected is exceeded into the dynamic range
To be compressed position of the frequency location as useful signal after the compensation；
According to the position to be compressed of useful signal after the compensation, by the letter on the position to be compressed of useful signal after the compensation
In number amplitude compression to the dynamic range.
5. a kind of sound quality optimization system is applied to feedback noise reduction earphone, which is characterized in that including：Feedback noise reduction system, control electricity
Road and compensator；
The feedback noise reduction system is sent to it for generating the de-noising signal needed for feedback noise reduction, and by the de-noising signal
Loud speaker, the signal to be sent into the loud speaker together to the control circuit by the de-noising signal carry out feedback noise reduction；
The compensator, the original useful signal of the loud speaker for receiving feedback noise reduction system to be sent into, according to the feedback
The noise reduction of noise reduction system compensates the original useful signal, with useful signal after being compensated；
The control circuit is connect with the compensator and the feedback noise reduction system, for according to predetermined dynamic model
It encloses, the signal amplitude that the dynamic range is exceeded in useful signal after the compensation is compressed in the dynamic range；It will pressure
Useful signal after contracting is exported to the loud speaker of the feedback noise reduction system, to export after the de-noising signal feedback noise reduction
Useful signal.
6. system according to claim 5, which is characterized in that the control circuit is after by the compensation in useful signal
When signal amplitude beyond the dynamic range is compressed in the dynamic range, it is used for：
According to effective noise reduction frequency range of the feedback noise reduction system, determine after the compensation in useful signal with effective noise reduction
To be compressed frequency range of the signal frequency range of frequency band match as useful signal after the compensation；
The signal amplitude for exceeding the dynamic range in the frequency range to be compressed of useful signal after the compensation is compressed to described dynamic
Within the scope of state.
7. system according to claim 6, which is characterized in that the control circuit is used for when determining frequency range to be compressed：
Bandpass filtering is carried out to useful signal after the compensation, wherein the band logical boundary of bandpass filtering is according to the feedback noise reduction
The boundary value of effective noise reduction frequency range of system determines；
Using the corresponding frequency range of the signal after bandpass filtering as the frequency range to be compressed of useful signal after the compensation.
8. the system described according to claim 6 or 7, which is characterized in that the control circuit useful letter after by the compensation
Number frequency range to be compressed in when being compressed in the dynamic range beyond the signal amplitude of the dynamic range, be used for：
Signal detection is carried out to the signal after the bandpass filtering, and the signal amplitude detected is exceeded into the dynamic range
To be compressed position of the frequency location as useful signal after the compensation；
According to the position to be compressed of useful signal after the compensation, by the letter on the position to be compressed of useful signal after the compensation
In number amplitude compression to the dynamic range.
9. a kind of earphone, which is characterized in that including the sound quality optimization system described in any one of claim 5~8.
10. a kind of computer readable storage medium of storage computer instruction, which is characterized in that when the computer instruction is by one
When a or multiple processors execute, one or more of processor perform claims is caused to require 1~4 any one of them sound quality
Optimization method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810846601.2A CN108810747A (en) | 2018-07-27 | 2018-07-27 | A kind of sound quality optimization method, system, earphone and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810846601.2A CN108810747A (en) | 2018-07-27 | 2018-07-27 | A kind of sound quality optimization method, system, earphone and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108810747A true CN108810747A (en) | 2018-11-13 |
Family
ID=64078513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810846601.2A Pending CN108810747A (en) | 2018-07-27 | 2018-07-27 | A kind of sound quality optimization method, system, earphone and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108810747A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111741409A (en) * | 2020-06-12 | 2020-10-02 | 瑞声科技(新加坡)有限公司 | Method for compensating for non-linearity of speaker, speaker apparatus, device, and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101742382A (en) * | 2009-11-24 | 2010-06-16 | 北京中星微电子有限公司 | Active noise cancellation method and earphone |
| CN104012110A (en) * | 2011-12-23 | 2014-08-27 | 伯斯有限公司 | Communications headset speech-based gain control |
| CN104303227A (en) * | 2012-03-26 | 2015-01-21 | 弗朗霍夫应用科学研究促进协会 | Apparatus and method for improving the perceived quality of sound reproduction by combining active noise cancellation and perceptual noise compensation |
| CN107077838A (en) * | 2014-09-30 | 2017-08-18 | 杜比实验室特许公司 | Earphone mixing active noise is eliminated and noise compensation |
| CN107395149A (en) * | 2017-07-28 | 2017-11-24 | 矽力杰半导体技术(杭州)有限公司 | Acoustic signal processing method, device and integrated circuit |
-
2018
- 2018-07-27 CN CN201810846601.2A patent/CN108810747A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101742382A (en) * | 2009-11-24 | 2010-06-16 | 北京中星微电子有限公司 | Active noise cancellation method and earphone |
| CN104012110A (en) * | 2011-12-23 | 2014-08-27 | 伯斯有限公司 | Communications headset speech-based gain control |
| CN104303227A (en) * | 2012-03-26 | 2015-01-21 | 弗朗霍夫应用科学研究促进协会 | Apparatus and method for improving the perceived quality of sound reproduction by combining active noise cancellation and perceptual noise compensation |
| CN107077838A (en) * | 2014-09-30 | 2017-08-18 | 杜比实验室特许公司 | Earphone mixing active noise is eliminated and noise compensation |
| CN107395149A (en) * | 2017-07-28 | 2017-11-24 | 矽力杰半导体技术(杭州)有限公司 | Acoustic signal processing method, device and integrated circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111741409A (en) * | 2020-06-12 | 2020-10-02 | 瑞声科技(新加坡)有限公司 | Method for compensating for non-linearity of speaker, speaker apparatus, device, and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102947685B (en) | Method and apparatus for reducing the effect of environmental noise on listeners | |
| KR101482488B1 (en) | Integrated psychoacoustic bass enhancement (pbe) for improved audio | |
| CN109348322B (en) | Wind noise prevention method, feedforward noise reduction system, earphone and storage medium | |
| CN111800687B (en) | Active noise reduction method and device, electronic equipment and storage medium | |
| CN109688498B (en) | Volume adjusting method, earphone and storage medium | |
| US9779718B2 (en) | Control circuit for active noise control and method for active noise control | |
| US20140105417A1 (en) | Audio signal playback system and electronic device | |
| CN109474865B (en) | Wind noise prevention method, earphone and storage medium | |
| CN108540895B (en) | Intelligent equalization device design method and noise cancelling headphone with intelligent equalization device | |
| CN111971975B (en) | Active noise reduction method, system, electronic equipment and chip | |
| JP2016504868A (en) | Micro speaker module, method for enhancing frequency response thereof, and electronic apparatus | |
| US20170111736A1 (en) | Audio bass compensation system and compensation method | |
| CN108600915B (en) | Audio output method and device, harmonic distortion filtering equipment and terminal | |
| CN107889007A (en) | Eliminate active denoising method and system of the noise reduction path to broadcasting acoustic impacts | |
| KR20140055932A (en) | Apparatus and method for keeping output loudness and quality of sound among differernt equalizer modes | |
| US9906198B2 (en) | Narrowing audio filter transition band | |
| CN108257617A (en) | A kind of noise scenarios identifying system and method | |
| CN111656436B (en) | Noise cancellation filter structure, noise cancellation system, and signal processing method | |
| CN108810747A (en) | A kind of sound quality optimization method, system, earphone and storage medium | |
| CN207835739U (en) | Active noise reduction system and active noise reduction earphone | |
| KR20140006394A (en) | Noise reduction processing device of earphone and headphone. | |
| CN206181308U (en) | Noise reduction device | |
| CN115278438A (en) | Noise reduction earphone, noise reduction method and device, storage medium and processor | |
| CN110191398B (en) | Howling suppression method, howling suppression device and computer readable storage medium | |
| US8509858B2 (en) | Source dependent wireless earpiece equalizing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181113 |
|
| RJ01 | Rejection of invention patent application after publication |