CN104581538B - The method and apparatus to abate the noise - Google Patents
The method and apparatus to abate the noise Download PDFInfo
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- CN104581538B CN104581538B CN201510045051.0A CN201510045051A CN104581538B CN 104581538 B CN104581538 B CN 104581538B CN 201510045051 A CN201510045051 A CN 201510045051A CN 104581538 B CN104581538 B CN 104581538B
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Abstract
This application discloses a kind of method and apparatus to abate the noise.One embodiment of this method includes：Before the first audio signal is played, the intensity level of the first audio signal is obtained；Detect the second audio signal that intensity level in the first audio signal is fallen outside a predetermined range；When detecting the second audio signal, noise reduction process is carried out to the first audio signal so that the intensity level of the first audio signal after noise reduction process is fallen into preset range；Play the first audio signal through noise reduction process.The embodiment is realized before the first audio signal is played, and eliminates the noise signal in the first audio signal, and then add Consumer's Experience.
Description
Technical field
The application is related to communication technical field, and in particular to the method and apparatus to abate the noise.
Background technology
Currently, people are increasingly got used to being made a phone call using intelligent mobile terminal, listen music and play video etc., still
Occasional hears the even sharp plosive of the noise of some louder volumes during audio is played, and then reduces user
Experience.
The content of the invention
In view of the above-mentioned problems, this application provides a kind of method and apparatus to abate the noise.
First aspect, there is provided a kind of method to abate the noise, including：
Before the first audio signal is played, the intensity level of first audio signal is obtained；Detect first audio
The second audio signal that intensity level is fallen outside a predetermined range in signal；When detecting second audio signal, to described
First audio signal carries out noise reduction process so that the intensity level of the first audio signal after noise reduction process falls into the preset range
It is interior；Play the first audio signal through noise reduction process.
In some embodiments, the acquisition includes：Pulse code modulation is carried out to first audio signal
(Pulse Code Modulation, PCM))；Obtain the intensity level of sign first audio signal obtained after PCM
PCM data.
In some embodiments, before the detection, methods described also includes：Institute is obtained according at least one of following
State the higher limit of preset range：Ambient noise signal, the playback equipment type for playing first audio signal.
In some embodiments, when it is at least one of described include the ambient noise signal when, the acquisition it is described
Higher limit and the intensity level correlation of ambient noise signal；Include the playback equipment type when at least one of described
When, the broadcasting away from human ear is apart from correlation, different type when the higher limit of acquisition plays audio with playback equipment
Playback equipment broadcasting distance it is different.
In some embodiments, the ambient noise signal and the playback equipment type are included when at least one of described
When, the higher limit is obtained, including：The higher limit is calculated according to below equation：Y=λ A+ σ B+ ρ；Wherein, the y is described
Higher limit, the A characterize playback equipment type, and the B characterizes the intensity level of the ambient noise signal, and the ρ is characterized in peace
User can receive the maximum intensity value of audio under stationary ring border, and the λ is the coefficient of the A, and the σ is the coefficient of the B.
In some embodiments, before the higher limit is calculated, in addition to：At least two are obtained by statistical method
Upper limit measured value；The λ and σ is calculated according to the upper limit measured value and ambient noise signal and playback equipment type.
In some embodiments, it is described according to the upper limit measured value and ambient noise signal and playback equipment type
The λ and the σ are calculated, including：The λ and σ is calculated according to below equation：
Wherein, the y 'mFor m-th of upper limit measured value, the m is positive integer, the AmCharacterize and obtain the y 'mWhen
Playback equipment type, the BmCharacterize and obtain the y 'mWhen ambient noise signal intensity level.
In some embodiments, according to the numerical value order from small to large of the A, the playback equipment type include with
It is any one of lower：Earphone, receiver, loudspeaker.
In some embodiments, the noise reduction process, including：Delete second audio signal.
In some embodiments, after the deletion, the noise reduction process also includes：Determine whether to described in execution
The first audio signal after deletion is smoothed；When it is determined that carrying out the smoothing processing, believed according to second audio
Number it is smoothed to performing the first audio signal after the deletion.
In some embodiments, the determination includes：Whether judge time span corresponding to second audio signal
More than scheduled time length；When more than the scheduled time length, it is determined that carrying out the smoothing processing.
In some embodiments, the scheduled time length and the intensity level correlation of ambient noise signal.
Second aspect, there is provided a kind of device to abate the noise, described device include：
Acquiring unit, for before the first audio signal is played, obtaining the intensity level of first audio signal；Detection
Unit, for detecting the second audio signal that intensity level is fallen outside a predetermined range in first audio signal；Noise reduction process
Unit, for when the detection unit detects second audio signal, being carried out to first audio signal at noise reduction
Reason so that the intensity level of the first audio signal after noise reduction process is fallen into the preset range；Broadcast unit, passed through for playing
First audio signal of the noise reduction processing unit noise reduction process.
In some embodiments, the acquiring unit, including：PCM modules, for being carried out to first audio signal
PCM；Acquisition module, for obtaining the intensity level for characterizing first audio signal obtained after the PCM modules PCM
PCM data.
In some embodiments, the acquiring unit, it is additionally operable to before the detection unit detects, according to below extremely
One item missing obtains the higher limit of the preset range：Ambient noise signal, the playback equipment class for playing first audio signal
Type.
In some embodiments, when it is at least one of described include the ambient noise signal when, the acquisition it is described
Higher limit and the intensity level correlation of ambient noise signal；Include the playback equipment type when at least one of described
When, the broadcasting away from human ear is apart from correlation, different type when the higher limit of acquisition plays audio with playback equipment
Playback equipment broadcasting distance it is different.
In some embodiments, the ambient noise signal and the playback equipment type are included when at least one of described
When, the acquiring unit, including：Computing module, for calculating the higher limit according to below equation：Y=λ A+ σ B+ ρ；Wherein,
The y is the higher limit, and the A characterizes playback equipment type, and the B characterizes the intensity level of the ambient noise signal, institute
The maximum intensity value of audio can be received by stating ρ and being characterized in user under quiet environment, and the λ is the coefficient of the A, and the σ is institute
State B coefficient.
In some embodiments, the computing module, it is additionally operable to before the higher limit is calculated, passes through statistic device
Obtain at least two upper limit measured values；Institute is calculated according to the upper limit measured value and ambient noise signal and playback equipment type
State λ and the σ.
In some embodiments, the computing module, is specifically used for, and the λ and σ is calculated according to below equation：
Wherein, the y 'mFor m-th of upper limit measured value, the m is positive integer, the AmCharacterize and obtain the y 'mWhen
Playback equipment type, the BmCharacterize and obtain the y 'mWhen ambient noise signal intensity level.
In some embodiments, according to the numerical value order from small to large of the A, the playback equipment type include with
It is any one of lower：Earphone, receiver, loudspeaker.
In some embodiments, the noise reduction process processing unit, including：Removing module, for deleting described second
Audio signal.
In some embodiments, the noise reduction process processing unit, in addition to：Determining module, in the deletion
Module is deleted after second audio signal, it is determined whether the first audio signal after noise reduction process is smoothed；
Smoothing module, for when the determining module determine carry out the smoothing processing when, according to second audio signal pair
The first audio signal after noise reduction process is smoothed.
In some embodiments, the determining module, including：Judging submodule, for judging the second audio letter
Whether time span corresponding to number is more than scheduled time length；Determination sub-module, for judging to be more than institute when the judge module
When stating scheduled time length, it is determined that carrying out the smoothing processing.
In some embodiments, the scheduled time length and the intensity level correlation of ambient noise signal.
The third aspect, there is provided a kind of terminal to abate the noise, the terminal include：
Audio signal sample device, for before the first audio signal is played, obtaining the intensity of first audio signal
Value；Detector, decline for detecting intensity level in first audio signal obtained by the audio signal sample device
The second audio signal outside preset range；Noise reduction process engine, for detecting the second audio letter when the detector
Number when, to first audio signal carry out noise reduction process so that the intensity level of the first audio signal after noise reduction process falls
Outside the preset range；Playback equipment, for playing the first audio signal through the noise reduction process engine noise reduction process.
In some embodiments, the audio signal sample device, including：Pulse code modulator, for described
One audio signal carries out PCM, and the PCM data of the intensity level of first audio signal is characterized with generation.
In some embodiments, the terminal also includes：Calculator, for detecting second sound in the detector
Before frequency signal, according at least one of following higher limit for obtaining the preset range：Ambient noise signal, play described first
The playback equipment type of audio signal.
In some embodiments, it is described when it is at least one of described include the ambient noise signal when, the acquisition
The higher limit and the intensity level correlation of ambient noise signal；Include the playback equipment class when at least one of described
During type, the broadcasting away from human ear is apart from correlation, inhomogeneity when the higher limit of acquisition plays audio with playback equipment
The broadcasting distance of the playback equipment of type is different.
In this programme, before the first audio signal is played, the intensity level of the first audio signal is obtained；Detect the first sound
The second audio signal that intensity level is fallen outside a predetermined range in frequency signal；When detecting the second audio signal, to the first sound
Frequency signal carries out noise reduction process so that the intensity level of the first audio signal after noise reduction process is fallen into preset range；Play warp
First audio signal of noise reduction process.Compared with prior art, the application is strong when detecting before the first audio signal is played
During the second audio signal that angle value is fallen outside a predetermined range, noise reduction process is carried out to the first audio signal, so so that enter
First audio signal of playback equipment is the audio signal through noise reduction process, thus, is avoided when playing the first audio signal
User's uppick noise, and then add Consumer's Experience.
Brief description of the drawings
By reading the detailed description made to non-limiting example made with reference to the following drawings, the application's is other
Feature, objects and advantages will become more apparent upon：
Fig. 1 shows a kind of flow chart of the embodiment for the method to abate the noise that the application provides；
Fig. 2 shows a kind of audiograph for first audio signal that the application provides；
Fig. 3 shows the flow chart of another embodiment for the method to abate the noise that the application provides；
Fig. 4 show the application provide a kind of PCM before and after the first audio signal oscillogram；
Fig. 5 shows a kind of oscillogram carried out to the first audio signal after PCM that the application provides；
Fig. 6 show the application provide a kind of carry out noise reduction process after the first audio signal PCM data oscillogram；
Fig. 7 shows determining whether to the first audio signal progress after execution deletion smoothly for the application offer
A kind of flow chart of embodiment of processing；
Fig. 8 shows the PCM data oscillogram before and after the carry out noise reduction process that the application provides；
Fig. 9 shows a kind of structural representation of the embodiment for the device to abate the noise that the application provides；
Figure 10 shows a kind of structural representation of the embodiment for the terminal to abate the noise that the application provides；
Figure 11 shows the structural representation of another embodiment for the terminal to abate the noise that the application provides.
Embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
Be easy to describe, illustrate only in accompanying drawing to about the related part of invention.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The application provides the one embodiment of method to abate the noise, and the embodiment in terminal by applied to illustrating
It is bright.Wherein, terminal can be but be not limited to：Smart mobile phone, tablet personal computer, pocket computer on knee and desktop computer etc..
Fig. 1 shows a kind of flow chart of the embodiment for the method to abate the noise that the application provides.
As shown in figure 1, the method to abate the noise can include：Step 110 is to step 140.
Specifically, in step 110, before the first audio signal is played, obtain the intensity level of the first audio signal.
First audio signal is the frequency of the regular sound wave with voice, music and audio, changes in amplitude information load
Body.In the present embodiment, the first audio signal can be but be not limited to any one of following：Converse audio, play music audio,
Play audio of video etc..
The audio signal that terminal is got is usually analog signal, and thus, the first audio signal in this step can be
Analog signal, or the data signal obtained after analog-to-digital conversion.When the first audio signal is analog signal, terminal can
To be sampled first to the first audio signal, then, the intensity level of the audio signal obtained after sampling is obtained；When the first audio
When signal is data signal, terminal can directly obtain the intensity level of the first audio signal.
The present embodiment is not construed as limiting to the method for obtaining the intensity level of simulated audio signal and digital audio and video signals, is ability
Technology known to the personnel of domain, therefore not to repeat here.
In the step 120, the second audio signal that intensity level is fallen outside a predetermined range in the first audio signal is detected.
Before noise reduction process is carried out to the first audio signal, it should determine to whether there is in the first audio signal first and make an uproar
Sound signal, however, it is determined that noise signal be present, then noise reduction process is carried out to the first audio signal.
In the present embodiment, terminal can determine to whether there is noise signal in the first audio signal according to intensity level.Tool
Body, Fig. 2 shows a kind of audiograph for first audio signal that the application provides.As shown in Fig. 2 terminal can determine first
The preset range 220 of intensity level, it is then detected that in the first audio signal 210 intensity level fall outside preset range 220 second
Audio signal 230, if detecting the second audio signal 230, it is determined that noise signal be present in the first audio signal 210, if not
Detect the second audio signal 230, it is determined that noise signal is not present in the first audio signal, wherein, noise signal is
Two audio signals 230.
Wherein, the intensity level that preset range includes is that normal person feels more comfortable intensity level when listening to audio,
Its higher limit and lower limit, which can be specifically actually needed, to be set, or, it can be set manually by user.
Fig. 1 is returned, in step 130, when detecting the second audio signal, the first audio signal is carried out at noise reduction
Reason so that the intensity level of the first audio signal after noise reduction process is fallen into preset range.
If detecting the second audio signal, illustrate that the first audio signal includes noise signal, thus, when detecting
During two audio signals, the audio signal of terminal-pair first carries out noise reduction process so that in the first audio signal through noise reduction process not
The noise signal fallen outside a predetermined range including intensity level.
In step 140, the first audio signal through noise reduction process is played.
In the present embodiment, terminal can play the first audio signal by following any type of playback equipment：Earphone,
Receiver, loudspeaker etc..
In this programme, before the first audio signal is played, the intensity level of the first audio signal is obtained；Detect the first sound
The second audio signal that intensity level is fallen outside a predetermined range in frequency signal；When detecting the second audio signal, to the first sound
Frequency signal carries out noise reduction process so that the intensity level of the first audio signal after noise reduction process is fallen into preset range；Play warp
First audio signal of noise reduction process.Compared with prior art, the application is strong when detecting before the first audio signal is played
During the second audio signal that angle value is fallen outside a predetermined range, noise reduction process is carried out to the first audio signal, so so that enter
First audio signal of playback equipment is the audio signal through noise reduction process, thus, is avoided when playing the first audio signal
User's uppick noise, and then add Consumer's Experience.
With further reference to Fig. 3, the flow of another embodiment of the method to abate the noise provided it illustrates the application
Figure.As shown in figure 3, the step 110 shown in Fig. 1 " before the first audio signal is played, obtains the intensity of the first audio signal
Value ", can further include step 310 and step 320.
Specifically, in the step 310, PCM is carried out to the first audio signal.
PCM refers to that, a Time Continuous, the continuous analog signal of value is transformed into time discrete, the discrete numeral of value
Transmitted in the channel after signal.Specifically, PCM is that analog signal is first sampled, then to sample value amplitude quantizing, the process of coding.
In the present embodiment, if the first audio signal that terminal receives is analog signal, terminal can be by
One audio signal carries out PCM to obtain the intensity level of the first audio signal.Fig. 4 is shown before and after a kind of PCM that the application provides
The first audio signal oscillogram.As shown in Figure 4.First audio signal can be continuous analog signal 410 by terminal, be turned
Discrete data signal 420 is changed to, wherein, the value of the digital representation PCM data of the longitudinal axis, unit is bit.Such as, terminal can incite somebody to action
The value of PCM data be 14 bits to the analog signal 411 between 15 bits, be all quantified as 15 bits.PCM specific implementation methods
For technology well known to those skilled in the art, therefore not to repeat here.
Fig. 3 is returned, in step 320, obtains the PCM numbers of the intensity level of the audio signal of sign first obtained after PCM
According to.
After the audio of terminal-pair first carries out PCM, the PCM data of the first audio signal, the PCM data can be got
It can be used for the intensity level for characterizing the first audio signal.As shown in figure 4, the intensity level of the value of PCM data and the first audio signal
The value of correlation, i.e. PCM data is bigger, and the intensity level of its first audio signal characterized is bigger, conversely, then smaller.
For example, Fig. 5 shows a kind of oscillogram carried out to the first audio signal after PCM that the application provides.Such as Fig. 5
Shown, when the time is " 1 ", the numerical value of PCM data is maximum, and when the time is " 0 ", the numerical value of PCM data is minimum, thus may be used
Know, when the time is " 1 ", the intensity level of the first audio signal is maximum, when the time is " 0 ", the intensity level of the first audio signal
It is minimum.
Because different types of playback equipment is in playing audio signal, the distance away from human ear is different, scene is different so that
The intensity level section for the audio signal that user is comfortable on differs, and e.g., rainy sound may in daytime noisy environment
It is difficult to heard by people, but people may clearly hear under night quiet environment；For another example, due to playing audio
When, earphone is different from distance of the loudspeaker away from human ear, and therefore, user is likely larger than using the intensity of the noise of earphone uppick
Using the intensity of the identical noise of loudspeaker uppick, therefore, in order to increase the accuracy of noise reduction process, and then further increase and use
Family experience, terminal it is determined that intensity level preset range when, it may be considered that made an uproar caused by the environment of playback equipment type and surrounding
Sound signal.Wherein, playback equipment type can include：Earphone, receiver, loudspeaker etc.
Return to Fig. 3, the content in epimere, alternatively, in the step 120 shown in Fig. 1 " in the first audio signal of detection
Before the second audio signal that intensity level is fallen outside a predetermined range ", it can also further include step 330.
Specifically, in a step 330, according at least one of following higher limit for obtaining preset range：Ambient noise signal,
Play the playback equipment type of the first audio signal.
In the present embodiment, before the first audio signal is played, terminal can obtain current ambient noise letter first
Number and/or play the first audio signal playback equipment type；Then, set according to the ambient noise signal of acquisition and/or broadcasting
Standby type obtains the higher limit of preset range.
Alternatively, when according to ambient noise signal acquisition preset range, higher limit and the ambient noise signal of acquisition
Intensity level correlation；When obtaining preset range according to playback equipment type, higher limit and the playback equipment of acquisition are broadcast
The broadcasting away from human ear is different apart from correlation, the broadcasting distance of different types of playback equipment during playback frequency.
Can be successively according to the order of broadcasting distance from small to large away from human ear, playback equipment type when playing：Earphone,
Receiver, loudspeaker.Wherein, earphone can include：Bluetooth earphone, line control earphone etc., receiver can include：It is built-in receiver, external
Receiver, similarly, loudspeaker can also include：Boombox, external loudspeaker.
Alternatively, when obtaining preset range according to ambient noise signal and playback equipment type, specifically can according to
Lower formula calculating upper limit value：Y=λ A+ σ B+ ρ；
Wherein, y is higher limit, and A characterizes playback equipment type, and B characterizes the intensity level of ambient noise signal, and ρ is characterized in peace
User can receive the maximum intensity value of audio under stationary ring border, and λ is A coefficient, and σ is B coefficient.
Alternatively, the broadcasting away from human ear is apart from correlation when A numerical value and playback equipment play audio, i.e. A's
Numerical value is bigger, and its sign is to play the bigger playback equipment of distance, conversely, what is then characterized sets to play apart from smaller broadcasting
It is standby.
It is well known that when playing the first audio signal by earphone, it is necessary to earphone is put into duct, when passing through receiver
, it is necessary to which receiver is bonded with human ear when playing the first audio-frequency information, when by loudspeaker play the first audio signal when, it is necessary to
Certain distance be present in human ear.Thus, it can be seen from the above, away from human ear during different types of the first audio signal of device plays
Broadcasting distance it is different, and the order according to broadcasting distance from small to large, i.e., according to A numerical value order from small to large, broadcast
Put device type and include but is not limited to following any one：Earphone, receiver, loudspeaker.Such as, as A=2, earphone can be characterized, when
During A=4, receiver can be characterized, as A=8, loudspeaker can be characterized.
In the present embodiment, can if terminal detects that the playback equipment type for playing the first audio signal is loudspeaker
Selection of land, in order to further increase the accuracy of the preset range of acquisition, terminal can also determine whether be boombox also
It is external loudspeaker.It is common, the broadcasting distance away from human ear during external loudspeaker playing audio signal, broadcast more than boombox
The broadcasting distance of playback frequency Signal off-set human ear, thus, terminal can set the numerical value for the A for characterizing external loudspeaker, more than table
Levy the A of boombox numerical value.
The present embodiment to playback equipment type, all types of playback equipments when playing audio away from human ear broadcasting distance and
Its magnitude relationship is not construed as limiting, and is not limited to the above-mentioned content enumerated, and can specifically be set according to being actually needed.
In the present embodiment, λ and σ can be predetermined value, or computationally be calculated before limit value.
Alternatively, before the higher limit of preset range is calculated, terminal can calculate λ and σ by following steps：Pass through system
Meter method obtains at least two upper limit measured values；Calculated according to upper limit measured value and ambient noise signal and playback equipment type
λ and σ.
Alternatively, terminal calculates λ and σ with specific reference to below equation：
Wherein, y 'mFor m-th of upper limit measured value, m is positive integer, AmCharacterize and obtain y 'mWhen playback equipment type, BmTable
Sign obtains y 'mWhen ambient noise signal intensity level.
For example, exemplified by obtaining two upper limit measured values, i.e. m can be respectively 1 or 2, and two upper limit measured values are respectively
y1' and y2′.It is possible, firstly, to two different scenes, scene 1 are set：Play the first audio letter in a noisy environment using receiver
Number, scene 2：The first audio signal is played in quiet environment using earphone, it follows that broadcasting between scene 1 and scene 2
Device type difference is put, the intensity level of external noise signal is also different；Then, user can be respectively in scene 1 with receiving in scene 2
Listen the audio signal of identical first, and set listened to respectively in scene 1 and scene 2 during the maximum intensity that is comfortable on
Two intensity levels of setting are defined as two upper limit measured values, i.e. y by value1' and y2′；Then, according to below equation calculate λ and
σ：
Wherein, y1′、A1、B1、y2′、A2、B2And ρ is known parameters；A1And B1The broadcasting characterized respectively in scene 1 is set
Standby type and external noise signal, A1Embodiments receiver, B1The intensity level of noise signal in embodiments noisy environment；A2
And B2Playback equipment type and the external noise signal in scene 2, A are characterized respectively2Embodiments earphone, B2Embodiments are quiet
The intensity level of noise signal in environment.Thus, it is possible to by solving above-mentioned equation group to calculate λ and σ.
What deserves to be explained is step 330 is not limited to perform after step 310 and step 320, can also be with step 310
Or step 320 performs simultaneously, the sequencing specifically performed can specifically be set according to being actually needed, and not gone to live in the household of one's in-laws on getting married herein
State.
Fig. 3 is returned to, alternatively, the step 130 in Fig. 1 " when detecting the second audio signal, is entered to the first audio signal
Row noise reduction process ", it can further include step 340.
Specifically, in step 340, delete the second audio signal.
For example, using preset range as the numerical intervals [0,0.6] of PCM data exemplified by, wherein, section [0,0.6] includes
Numerical value be that the numerical value of PCM data that is obtained after PCM is carried out to the first audio signal.As shown in figure 5, according to the first audio
PCM data oscillogram after signal progress PCM understands that the value that PCM data in the first audio signal be present falls in section [0,0.6]
Outside the second audio signal 510, thus, terminal need delete the second audio signal 510.Fig. 6 shows what the application provided
A kind of PCM data oscillogram of the first audio signal after carry out noise reduction process, that is, show after deleting the second audio signal
The PCM data oscillogram of first audio signal.As shown in fig. 6, delete the PCM of the first audio signal after the second audio signal
The numerical value of data, each fall within section [0,0.6].
In the present embodiment, noise reduction process is carried out to the first audio signal to be not limited to delete the second audio signal, may be used also
The numerical value of the PCM data of the second audio signal of adjustment is thought, to cause it to fall into section [0,0.6].Noise reduction process is specific
Implementation can specifically be set according to being actually needed, and therefore not to repeat here.
In the present embodiment, the lower limit of preset range can be configured to default fixed value, or, can also be by end
End is configured according to current noise signal and playback equipment type, and e.g., lower limit can be in just with the intensity level of noise signal
Dependency relation, the broadcasting away from human ear is apart from correlation when can also play audio with different types of playback equipment.Under
Limit value and its method to set up can specifically be set according to being actually needed, and be not limited to the above-mentioned method enumerated.
Fig. 3 is returned to, alternatively, as shown in figure 3, in order to reduce the distortion journey of the first audio signal after carrying out noise reduction process
Degree, after step 340 " deleting the second audio signal ", it can also further include step 350 and step 360.
Specifically, in step 350, it is determined whether be smoothed to performing the first audio signal after deleting.
Alternatively, Fig. 7 show the application provide determine whether to perform delete after the first audio signal put down
A kind of flow chart of embodiment of sliding processing.As shown in fig. 7, the step 350 shown in Fig. 3 " is determined whether to deleting the second audio
The first audio signal after signal is smoothed ", it can further include step 710 and step 720.
Specifically, in step 720, judge whether time span corresponding to the second audio signal is more than scheduled time length
Degree.If being more than scheduled time length, step 720 is performed, if being less than or equal to scheduled time length, flow terminates.
When the intensity level of ambient noise signal is smaller, the distortion effect for carrying out the first audio signal after noise reduction process is brighter
It is aobvious.Thus, alternatively, scheduled time length can be with the intensity level correlation of ambient noise signal.I.e. when the external world makes an uproar
The intensity level of sound signal is bigger, and scheduled time length is bigger, and when the intensity level of ambient noise signal is smaller, scheduled time length is got over
It is small.Common, scheduled time length can be：0.2 second, 0.3 second etc..Scheduled time length and its method to set up specifically can roots
According to being set, therefore not to repeat here.
In step 720, when more than scheduled time length, it is determined that being smoothed.
If time span corresponding to the second audio signal is more than scheduled time length, illustrate deleting the second audio signal
Afterwards, the first audio signal occur distortion degree it is larger, thus, it is desirable to delete the second audio signal after the first audio believe
Number it is smoothed.
Fig. 3 is returned to, in step 360, when it is determined that being smoothed, after being deleted according to the second audio signal execution
The first audio signal be smoothed.
Smoothing processing specifically may comprise steps of：First, it is determined that intensity level is maximum in the second audio signal deleted
When time point, the i.e. PCM data of the second audio signal numerical value maximum when time point；It is then possible to by the time point pair
The numerical value of the PCM data for the second audio signal answered is reduced to the higher limit of preset range；Finally, the PCM around determining successively
The numerical value of data, and the waveform of PCM data is recombined, it is occurred without breakpoint.Smoothing processing is those skilled in the art's number
The technology of value, therefore not to repeat here.
For example, Fig. 8 shows the PCM data oscillogram before and after the carry out noise reduction process that the application provides.As shown in figure 8,
Exemplified by using preset range as the numerical intervals [0,0.6] of PCM data, before waveform 810 is progress noise reduction process, that is, second is deleted
Audio signal and the waveform of the PCM data of the first audio signal before being smoothed, waveform 820 are progress noise reduction process
Afterwards, that is, the waveform of the PCM data of the first audio signal after deleting the second audio signal and being smoothed.
As the realization to method shown in above-mentioned each figure, the application provides the dress for implementing the above-mentioned method to abate the noise
The one embodiment put.With reference to figure 9, a kind of structure of embodiment of the device to abate the noise provided it illustrates the application is shown
It is intended to.
Specifically, as shown in figure 9, the device 900 to abate the noise includes：Acquiring unit 910, for playing the first audio
Before signal, the intensity level of the first audio signal is obtained；Detection unit 920, fall for detecting intensity level in the first audio signal
The second audio signal outside preset range；Noise reduction processing unit 930, for detecting the second audio when detection unit 920
During signal, noise reduction process is carried out to the first audio signal so that the intensity level of the first audio signal after noise reduction process falls into pre-
Determine in scope；Broadcast unit 940, for playing the first audio signal through the noise reduction process of noise reduction processing unit 930.
Alternatively, acquiring unit 910, including：PCM modules 911, for carrying out PCM to the first audio signal；Acquisition module
912, the PCM data of the intensity level for obtaining the audio signal of sign first obtained after PCM modules 911PCM.
Alternatively, acquiring unit 910, it is additionally operable to before detection unit 920 detects, is obtained in advance according at least one of following
Determine the higher limit of scope：Ambient noise signal, the playback equipment type for playing the first audio signal.
Alternatively, when at least one includes ambient noise signal, the higher limit of acquisition and the intensity of ambient noise signal
It is worth correlation；When at least one includes playback equipment type, when the higher limit of acquisition plays audio with playback equipment
Broadcasting away from human ear is different apart from correlation, the broadcasting distance of different types of playback equipment.
Alternatively, when at least one includes ambient noise signal and playback equipment type, acquiring unit 910, including：Meter
Module 913 is calculated, for according to below equation calculating upper limit value：Y=λ A+ σ B+ ρ；Wherein, y is higher limit, and A characterizes playback equipment
Type, B characterize the intensity level of ambient noise signal, and ρ, which is characterized in user under quiet environment, can receive the maximum intensity value of audio,
λ is A coefficient, and σ is B coefficient.
Alternatively, computing module 913, it is additionally operable to before computationally limit value, is obtained by statistic device at least two
Limit measured value；λ and σ is calculated according to upper limit measured value and ambient noise signal and playback equipment type.
Alternatively, computing module 913, it is specifically used for, λ and σ is calculated according to below equation：
Wherein, y 'mFor m-th of upper limit measured value, m is positive integer, AmCharacterize and obtain y 'mWhen playback equipment type, BmTable
Sign obtains y 'mWhen ambient noise signal intensity level.
Alternatively, include any one of following according to A numerical value order from small to large, playback equipment type：Earphone, listen
Cylinder, loudspeaker.
Alternatively, noise reduction process processing unit 930, including：Removing module 931, for deleting the second audio signal.
Alternatively, noise reduction process processing unit 930 can also include：Determining module 932, for being deleted in removing module 931
After the second audio signal, it is determined whether the first audio signal after noise reduction process is smoothed；Smoothing processing mould
Block 933, for when determining module 932 determine be smoothed when, according to the second audio signal to first after noise reduction process
Audio signal is smoothed.
Optionally it is determined that module 932, including：Judging submodule 9321, for judging the time corresponding to the second audio signal
Whether length is more than scheduled time length；Determination sub-module 9322, for judging to be more than the scheduled time when judging submodule 9321
During length, it is determined that being smoothed.
Alternatively, scheduled time length can be with the intensity level correlation of ambient noise signal.
In this programme, before broadcast unit plays the first audio signal, acquiring unit obtains the first audio signal
Intensity level；Detection unit detects the second audio signal that intensity level is fallen outside a predetermined range in the first audio signal；Work as detection
When unit detects the second audio signal, noise reduction processing unit carries out noise reduction process to the first audio signal so that noise reduction process
The intensity level of the first audio signal afterwards is fallen into preset range；Broadcast unit plays the first audio signal through noise reduction process.
Compared with prior art, the application is before the first audio signal is played, when detecting what intensity level was fallen outside a predetermined range
During the second audio signal, noise reduction process is carried out to the first audio signal, so so that into the first audio signal of playback equipment
For the audio signal through noise reduction process, thus, user's uppick noise when playing the first audio signal is avoided, and then increase
Consumer's Experience.
With further reference to Figure 10, it illustrates a kind of embodiment of the terminal for implementing the above-mentioned method to abate the noise
Structural representation.
Specifically, as shown in Figure 10, the terminal 1000 to abate the noise includes：Audio signal sample device 1010, for broadcasting
Before putting the first audio signal, the intensity level of the first audio signal is obtained；Detector 1020, adopted for detecting by audio signal
The second audio signal fallen outside a predetermined range in the first audio signal that storage 1010 obtains in intensity level；Noise reduction process is drawn
1030 are held up, for when detector 1020 detects the second audio signal, carrying out noise reduction process to the first audio signal so that drop
The intensity level for the first audio signal after handling of making an uproar is fallen outside a predetermined range；Playback equipment 1040, for playing at through noise reduction
Manage the first audio signal of the noise reduction process of engine 1030.
Alternatively, audio signal sample device 1010, including：Pulse code modulator 1011, for the first audio signal
PCM is carried out, the PCM data of the intensity level of the first audio signal is characterized with generation.
Alternatively, the terminal 1000 to abate the noise can also include：Calculator 1050, in the detection of detector 1,020 the
Before two audio signals, according at least one of following higher limit for obtaining preset range：Ambient noise signal, play the first audio
The playback equipment type of signal.
Alternatively, when at least one includes ambient noise signal, the higher limit of acquisition and the intensity of ambient noise signal
It is worth correlation；When at least one includes playback equipment type, higher limit and the playback equipment 1040 of acquisition play sound
The broadcasting away from human ear is different apart from correlation, the broadcasting distance of different types of playback equipment during frequency.
Alternatively, calculator 1050, specifically for when at least one includes ambient noise signal and playback equipment type,
According to below equation calculating upper limit value：Y=λ A+ σ B+ ρ；Wherein, y is higher limit, and A characterizes playback equipment type, and B characterizes extraneous
The intensity level of noise signal, ρ, which is characterized in user under quiet environment, can receive the maximum intensity value of audio, and λ is A coefficient, and σ is
B coefficient.
Alternatively, calculator 1050, it is additionally operable to before computationally limit value, at least two upper limits is obtained by statistical method
Measured value；λ and σ is calculated according to upper limit measured value and ambient noise signal and playback equipment type.
Alternatively, calculator 1050, specifically for calculating λ and σ according to below equation：
Wherein, y 'mFor m-th of upper limit measured value, m is positive integer, AmCharacterize and obtain y 'mWhen playback equipment type, BmTable
Sign obtains y 'mWhen ambient noise signal intensity level.
Alternatively, include any one of following according to A numerical value order from small to large, playback equipment type：Earphone, listen
Cylinder, loudspeaker.
Alternatively, noise reduction process engine 1030, specifically for deleting the second audio signal.
Alternatively, noise reduction process engine 1030, it is additionally operable to after the second audio signal is deleted, it is determined whether execution is deleted
The first audio signal after removing is smoothed；When it is determined that being smoothed, execution is deleted according to the second audio signal
The first audio signal after removing is smoothed.
Alternatively, noise reduction process engine 1030, specifically for judging whether time span is big corresponding to the second audio signal
In scheduled time length；When more than scheduled time length, it is determined that being smoothed.
Alternatively, scheduled time length and the intensity level correlation of ambient noise signal.
In this programme, before the first audio signal is played, the terminal to abate the noise obtains the strong of the first audio signal
Angle value；Detect the second audio signal that intensity level in the first audio signal is fallen outside a predetermined range；When detecting the second audio
During signal, noise reduction process is carried out to the first audio signal so that the intensity level of the first audio signal after noise reduction process falls into pre-
Determine in scope；Play the first audio signal through noise reduction process.Compared with prior art, the application is playing the first audio signal
Before, when detecting the second audio signal that intensity level is fallen outside a predetermined range, the first audio signal is carried out at noise reduction
Reason, so so that the first audio signal into playback equipment is the audio signal through noise reduction process, thus, avoids and is broadcasting
User's uppick noise when putting the first audio signal, and then add Consumer's Experience.
As the realization to method shown in above-mentioned each figure, it is provided below another for implementing the above-mentioned method to abate the noise
Terminal.With reference to figure 11, the structural representation of another embodiment of the terminal provided it illustrates the application.
Specifically, as shown in figure 11, the terminal 1100 to abate the noise includes：At least one processor 1110, such as CPU
(Central Processing Unit, central processing unit), at least one output interface 1120 or other users interface
1130, memory 1140, at least one communication bus 1150.Communication bus 1150 is used to realize that the connection between said modules is led to
Letter.The terminal 1100 to abate the noise optionally includes other users interface 1130, including display, keyboard or pointing device
(for example, mouse, trace ball (trackball), touch-sensitive plate or touch sensitive display screen).Memory 1140 may include high-speed RAM
(Random Access Memory, random access memory), it is also possible to also including non-labile memory (non-
Volatile memory), a for example, at least magnetic disk storage.Memory 1140 can optionally include at least one be located at
Storage device away from aforementioned processor 1110.
In some embodiments, memory 1140 stores following element, can perform module or data structure, or
Their subset of person, or their superset:
Operating system 1141, comprising various system programs, for realizing that various basic businesses and processing are hardware based
Task.
Application program 1142, comprising various application programs, for realizing various applied business.
Specifically, it can be, but not limited to include in application program 1141：
Acquiring unit, for before the first audio signal is played, obtaining the intensity level of the first audio signal；Detection is single
Member, for detecting the second audio signal that intensity level is fallen outside a predetermined range in the first audio signal；Noise reduction processing unit, use
In when detection unit detects the second audio signal, noise reduction process is carried out to the first audio signal so that after noise reduction process
The intensity level of first audio signal is fallen into preset range；Broadcast unit, for playing through noise reduction processing unit noise reduction process
First audio signal.
Alternatively, acquiring unit, including：PCM modules, for carrying out PCM to the first audio signal；Acquisition module, it is used for
Obtain the PCM data of the intensity level of the audio signal of sign first obtained after PCM modules PCM.
Alternatively, acquiring unit, it is additionally operable to before detection unit detects, preset range is obtained according at least one of following
Higher limit：Ambient noise signal, the playback equipment type for playing the first audio signal.
Alternatively, when at least one includes ambient noise signal, the higher limit of acquisition and the intensity of ambient noise signal
It is worth correlation；When at least one includes playback equipment type, when the higher limit of acquisition plays audio with playback equipment
Broadcasting away from human ear is different apart from correlation, the broadcasting distance of different types of playback equipment.
Alternatively, when at least one includes ambient noise signal and playback equipment type, acquiring unit, including：Calculate
Module, for according to below equation calculating upper limit value：Y=λ A+ σ B+ ρ；Wherein, y is higher limit, and A characterizes playback equipment type, B
The intensity level of ambient noise signal is characterized, ρ, which is characterized in user under quiet environment, can receive the maximum intensity value of audio, and λ is A's
Coefficient, σ are B coefficient.
Alternatively, computing module, it is additionally operable to before computationally limit value, obtaining at least two upper limits by statistic device surveys
Value；λ and σ is calculated according to upper limit measured value and ambient noise signal and playback equipment type.
Alternatively, computing module, it is specifically used for, λ and σ is calculated according to below equation：
Wherein, y 'mFor m-th of upper limit measured value, m is positive integer, AmCharacterize and obtain y 'mWhen playback equipment type, BmTable
Sign obtains y 'mWhen ambient noise signal intensity level.
Alternatively, include any one of following according to A numerical value order from small to large, playback equipment type：Earphone, listen
Cylinder, loudspeaker.
Alternatively, noise reduction process processing unit, including：Removing module, for deleting the second audio signal.
Alternatively, noise reduction process processing unit, in addition to：Determining module, for deleting the second audio letter in removing module
After number, it is determined whether the first audio signal after noise reduction process is smoothed；Smoothing module, for when determination
When module determines to be smoothed, the first audio signal after noise reduction process is smoothly located according to the second audio signal
Reason.
Optionally it is determined that module, including：Judging submodule, for judging that time span corresponding to the second audio signal is
It is no to be more than scheduled time length；Determination sub-module, for when judge module judge be more than the scheduled time length when, it is determined that being put down
Sliding processing.
Alternatively, scheduled time length and the intensity level correlation of ambient noise signal.
In the present embodiment, the program or instruction that processor 1150 is stored by calling in memory 1140 perform corresponding step
Suddenly, processor 1150, it is used for：
Before the first audio signal is played, the intensity level of the first audio signal is obtained；Detect strong in the first audio signal
The second audio signal that angle value is fallen outside a predetermined range；When detecting the second audio signal, the first audio signal is carried out
Noise reduction process so that the intensity level of the first audio signal after noise reduction process is fallen into preset range；Play through noise reduction process
First audio signal.
Alternatively, processor 1150, specifically for carrying out PCM to the first audio signal；Obtain the sign obtained after PCM
The PCM data of the intensity level of first audio signal.
Alternatively, processor 1150, it is additionally operable to before testing, according at least one of following upper limit for obtaining preset range
Value：Ambient noise signal, the playback equipment type for playing the first audio signal.
Alternatively, when at least one includes ambient noise signal, the higher limit of acquisition and the intensity of ambient noise signal
It is worth correlation；When at least one includes playback equipment type, when the higher limit of acquisition plays audio with playback equipment
Broadcasting away from human ear is different apart from correlation, the broadcasting distance of different types of playback equipment.
Alternatively, processor 1150, specifically for when at least one includes ambient noise signal and playback equipment type,
According to below equation calculating upper limit value：Y=λ A+ σ B+ ρ；Wherein, y is higher limit, and A characterizes playback equipment type, and B characterizes extraneous
The intensity level of noise signal, ρ, which is characterized in user under quiet environment, can receive the maximum intensity value of audio, and λ is A coefficient, and σ is
B coefficient.
Alternatively, processor 1150, before computationally limit value, obtained by statistical method at least two
Limit measured value；λ and σ is calculated according to upper limit measured value and ambient noise signal and playback equipment type.
Alternatively, processor 1150, specifically for calculating λ and σ according to below equation：
Wherein, y 'mFor m-th of upper limit measured value, m is positive integer, AmCharacterize and obtain y 'mWhen playback equipment type, BmTable
Sign obtains y 'mWhen ambient noise signal intensity level.
Alternatively, include any one of following according to A numerical value order from small to large, playback equipment type：Earphone, listen
Cylinder, loudspeaker.
Alternatively, processor 1150, specifically for deleting the second audio signal.
Alternatively, processor 1150, specifically for after deletion, it is determined whether believe performing the first audio after deleting
Number it is smoothed；When it is determined that being smoothed, believed according to the second audio signal performing the first audio after deleting
Number it is smoothed.
Alternatively, processor 1150, specifically for judging it is predetermined whether time span corresponding to the second audio signal is more than
Time span；When more than scheduled time length, it is determined that being smoothed.
Alternatively, scheduled time length and the intensity level correlation of ambient noise signal.
In this programme, before the first audio signal is played, the terminal to abate the noise obtains the strong of the first audio signal
Angle value；Detect the second audio signal that intensity level in the first audio signal is fallen outside a predetermined range；When detecting the second audio
During signal, noise reduction process is carried out to the first audio signal so that the intensity level of the first audio signal after noise reduction process falls into pre-
Determine in scope；Play the first audio signal through noise reduction process.Compared with prior art, the application is playing the first audio signal
Before, when detecting the second audio signal that intensity level is fallen outside a predetermined range, the first audio signal is carried out at noise reduction
Reason, so so that the first audio signal into playback equipment is the audio signal through noise reduction process, thus, avoids and is broadcasting
User's uppick noise when putting the first audio signal, and then add Consumer's Experience.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.People in the art
Member should be appreciated that invention scope involved in the application, however it is not limited to the technology that the particular combination of above-mentioned technical characteristic forms
Scheme, while should also cover in the case where not departing from the inventive concept, carried out by above-mentioned technical characteristic or its equivalent feature
The other technical schemes for being combined and being formed.Such as features described above has similar work(with (but not limited to) disclosed herein
The technical scheme that the technical characteristic of energy is replaced mutually and formed.
Claims (16)
- A kind of 1. method to abate the noise, it is characterised in that methods described includes：Before the first audio signal is played, the intensity level of first audio signal is obtained；Detect the second audio signal that intensity level is fallen outside a predetermined range in first audio signal；When detecting second audio signal, noise reduction process is carried out to first audio signal so that after noise reduction process The intensity level of the first audio signal fall into the preset range；AndPlay the first audio signal through noise reduction process；Wherein, before the detection, in addition to：According at least one of following higher limit for obtaining the preset range：Ambient noise signal, play the first audio letter Number playback equipment type；When it is at least one of described include the ambient noise signal and the playback equipment type when, obtain the higher limit, bag Include：The higher limit is calculated according to below equation：Y=λ A+ σ B+ ρ；Wherein, the y is the higher limit, and the A characterizes playback equipment type, and the B characterizes the ambient noise signal Intensity level, the ρ, which is characterized in user under quiet environment, can receive the maximum intensity value of audio, and the λ is the coefficient of the A, The σ is the coefficient of the B.
- 2. according to the method for claim 1, it is characterised in that the acquisition includes：Pulse code modulation PCM is carried out to first audio signal；Obtain the PCM data of the intensity level of sign first audio signal obtained after PCM.
- 3. according to the method for claim 1, it is characterised in that include the ambient noise signal when at least one of described When, the higher limit of the acquisition and the intensity level correlation of ambient noise signal；When it is at least one of described include the playback equipment type when, when the higher limit of acquisition is with playback equipment broadcasting audio Broadcasting away from human ear is different apart from correlation, the broadcasting distance of different types of playback equipment.
- 4. according to the method for claim 1, it is characterised in that before the higher limit is calculated, in addition to：At least two upper limit measured values are obtained by statistical method；The λ and σ is calculated according to the upper limit measured value, ambient noise signal, playback equipment type.
- 5. according to the method for claim 4, it is characterised in that described to be believed according to the upper limit measured value and ambient noise Number and playback equipment type calculate the λ and σ, including：The λ and σ is calculated according to below equation：Wherein, the y 'mFor m-th of upper limit measured value, the m is positive integer, the AmCharacterize and obtain the y 'mWhen broadcasting Device type, the BmCharacterize and obtain the y 'mWhen ambient noise signal intensity level.
- 6. according to the method for claim 1, it is characterised in that described to broadcast according to the numerical value order from small to large of the A Putting device type includes following any one：Earphone, receiver, loudspeaker.
- 7. according to the method for claim 1, it is characterised in that the noise reduction process, including：Delete second audio signal.
- 8. according to the method for claim 7, it is characterised in that after the deletion, the noise reduction process also includes：Determine whether to be smoothed the first audio signal after the execution deletion；When it is determined that carrying out the smoothing processing, the first audio after performing the deletion is believed according to second audio signal Number it is smoothed.
- 9. according to the method for claim 8, it is characterised in that the determination includes：Judge whether time span corresponding to second audio signal is more than scheduled time length；When more than the scheduled time length, it is determined that carrying out the smoothing processing.
- 10. according to the method for claim 9, it is characterised in that the scheduled time length is strong with ambient noise signal Angle value correlation.
- 11. a kind of device to abate the noise, it is characterised in that described device includes：Acquiring unit, for before the first audio signal is played, obtaining the intensity level of first audio signal；Detection unit, for detecting the second audio signal that intensity level is fallen outside a predetermined range in first audio signal；Noise reduction processing unit, for when the detection unit detects second audio signal, believing first audio Number carry out noise reduction process so that the intensity level of the first audio signal after noise reduction process is fallen into the preset range；AndBroadcast unit, for playing the first audio signal through the noise reduction processing unit noise reduction process；The acquiring unit, it is additionally operable to before the detection unit detects, the predetermined model is obtained according at least one of following The higher limit enclosed：Ambient noise signal, the playback equipment type for playing first audio signal；When it is at least one of described include the ambient noise signal and the playback equipment type when, the acquiring unit, including： Computing module, for calculating the higher limit according to below equation：Y=λ A+ σ B+ ρ；Wherein, the y is the higher limit, institute State A and characterize playback equipment type, the B characterizes the intensity level of the ambient noise signal, and the ρ is characterized under quiet environment and used Family can receive the maximum intensity value of audio, and the λ is the coefficient of the A, and the σ is the coefficient of the B.
- 12. device according to claim 11, it is characterised in that the acquiring unit, including：PCM modules, for carrying out PCM to first audio signal；Acquisition module, for obtaining the intensity level for characterizing first audio signal obtained after the PCM modules PCM PCM data.
- 13. device according to claim 11, it is characterised in that described to include the ambient noise when at least one of described During signal, the higher limit of the acquisition and the intensity level correlation of ambient noise signal；When it is at least one of described include the playback equipment type when, when the higher limit of acquisition is with playback equipment broadcasting audio Broadcasting away from human ear is different apart from correlation, the broadcasting distance of different types of playback equipment.
- 14. a kind of terminal to abate the noise, it is characterised in that the terminal includes：Audio signal sample device, for before the first audio signal is played, obtaining the intensity level of first audio signal；Detector, decline for detecting intensity level in first audio signal obtained by the audio signal sample device The second audio signal outside preset range；Noise reduction process engine, for when the detector detects second audio signal, to first audio signal Carry out noise reduction process so that the intensity level of the first audio signal after noise reduction process falls outside the preset range；AndPlayback equipment, for playing the first audio signal through the noise reduction process engine noise reduction process；Wherein, the terminal also includes：Calculator, for before the detector detects second audio signal, according at least one of following obtain The higher limit of preset range：Ambient noise signal, the playback equipment type for playing first audio signal；When it is at least one of described include the ambient noise signal and the playback equipment type when, the calculator is additionally operable to： The higher limit is calculated according to below equation：Y=λ A+ σ B+ ρ；Wherein, the y is the higher limit, and the A characterizes broadcasting and set Standby type, the B characterize the intensity level of the ambient noise signal, and the ρ, which is characterized in user under quiet environment, can receive sound The maximum intensity value of frequency, the λ are the coefficient of the A, and the σ is the coefficient of the B.
- 15. terminal according to claim 14, it is characterised in that the audio signal sample device, including：Pulse code modulator, for carrying out PCM to first audio signal, first audio signal is characterized with generation The PCM data of intensity level.
- 16. terminal according to claim 14, it is characterised in that described to include the ambient noise when at least one of described During signal, the higher limit of the acquisition and the intensity level correlation of ambient noise signal；When it is at least one of described include the playback equipment type when, when the higher limit of acquisition is with playback equipment broadcasting audio Broadcasting away from human ear is different apart from correlation, the broadcasting distance of different types of playback equipment.
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| CN105635916A (en) * | 2015-12-28 | 2016-06-01 | 小米科技有限责任公司 | Audio processing method and apparatus |
| CN109554852B (en) * | 2018-12-29 | 2021-03-09 | 杰克缝纫机股份有限公司 | Resonance and noise eliminating method, sewing machine controller and sewing machine |
| CN114520988B (en) * | 2021-12-21 | 2024-01-12 | 海能达通信股份有限公司 | Squelch control method, device, equipment and readable storage medium |
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