CN109413253A - A kind of noise-eliminating method and device for realizing mobile terminal - Google Patents

A kind of noise-eliminating method and device for realizing mobile terminal Download PDF

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Publication number
CN109413253A
CN109413253A CN201710709083.5A CN201710709083A CN109413253A CN 109413253 A CN109413253 A CN 109413253A CN 201710709083 A CN201710709083 A CN 201710709083A CN 109413253 A CN109413253 A CN 109413253A
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China
Prior art keywords
noise reduction
mobile terminal
posture
reduction parameters
mic
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CN201710709083.5A
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Chinese (zh)
Inventor
于冰
刘波
谢姣
孙家训
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Xian Zhongxing New Software Co Ltd
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Xian Zhongxing New Software Co Ltd
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Priority to CN201710709083.5A priority Critical patent/CN109413253A/en
Priority to PCT/CN2018/101136 priority patent/WO2019034154A1/en
Publication of CN109413253A publication Critical patent/CN109413253A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0272—Voice signal separating
    • G10L21/028—Voice signal separating using properties of sound source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor

Abstract

The invention discloses a kind of noise-eliminating method and device for realizing mobile terminal, it is related to hand-held communicating tech.When the noise-eliminating method for realizing mobile terminal herein includes: that mobile terminal enters hand-held call mode, the current posture information of acquisition mobile terminal；Noise reduction parameters configuration file corresponding with the current posture information of the mobile terminal is called from the noise reduction parameters calibration data base pre-established, carries out audio amendment and noise reduction process according to dual microphone MIC of the noise reduction parameters configuration file called to the mobile terminal.

Description

A kind of noise-eliminating method and device for realizing mobile terminal
Technical field
The present invention relates to hand-held communicating tech, in particular to a kind of noise-eliminating method and device for realizing mobile terminal.
Background technique
The hand-held voice communication of mobile phone is the most widely used basic function.Therefore, the audio performance for holding call is non- It is often important, belong to the most easy cell-phone function for influencing user experience.In the more noisy environment of environment, hand-held call is carried out, it is right Side is difficult not hearing the voice content spoken.In order to solve this problem, at present industry it is more commonly used be to be eliminated using double MIC Ambient noise promotes the scheme of ascending voice communication effect.The basic principle is that: with preferably hand-held posture call, mouth away from MIC main from mobile phone is closer, farther out apart from auxiliary MIC.The voice signal that main MIC is picked up is larger, and the signal that auxiliary MIC is picked up is smaller.With Main MIC signal cuts auxiliary MIC signal, to realize that the purpose for balancing out ambient noise, the downlink of the other side of call are received by The clean call voice of one comparison, so that the quality of hand-held voice communication is wished to ensure that, from the influence of ambient noise.
In the related technology, the specific implementation process that the scheme of ambient noise is eliminated using double MIC is as follows:
1) main MIC picks up voice signal VMAIN, and VMAIN includes call audio signal VCALL_MAINIt makes an uproar with background to be filtered out Acoustical signal VNOISE_MAIN。
2) auxiliary MIC picks up voice signal VAUX, VAUXInclude the audio signal V that conversesCALL_AUXBelieve with ambient noise to be filtered out Number VNOISE_AUX。
3) audio CODEC chip, which finally calculates, obtains voice signal VNOICE, calculation formula is as follows:
VNOICE=VMAIN-VAUX
=(VCALL_MAIN+VNOISE_MAIN)-(VCALL_AUX+VNOISE_AUX)
Wherein, it for existing audio CODEC chip, requires to execute denoising algorithm to realize and optimize double MIC de-noisings Function.In order to effectively eliminate noise, while guaranteeing normal In Call size, needs to obtain a proper gain VNOICESignal.The MIC denoising algorithm of industry CODEC chip has all respectively done a basic range to VNOICE value and has defined, this Namely guarantee the primary condition of volume and effective de-noising.Defining gain ranging herein is [A:B] db, it may be assumed that
Adb<VNOICE<Bdb
Different CODEC chip producers, [A:B] is slightly different, from the point of view of summarizing, if A=6, B=9, it is ensured that each family The compatibility of CODEC chip MIC denoising algorithm.
In addition, in practical applications, the hand-held posture of difference can also affect to MIC denoising algorithm.
First illustratively under standard gestures as shown in Figure 1, the realization principle of MIC denoising algorithm:
VNOICE=VMAIN-VAUX
=(VCALL_MAIN+VNOISE_MAIN)-(VCALL_AUX+VNOISE_AUX)
=(VCALL_MAIN-VCALL_AUX)+(VNOISE_MAIN-VNOISE_AUX)
Wherein, ambient noise VNOISE_MAINAnd VNOISE_AUXSize is essentially identical.So:
VNOICE=VCALL_MAIN-VCALL_AUX
And VCALL_MAINIt is bigger,VCALL_AUXIt is smaller, therefore, under standard gestures, it is easy to VNOICE value be accomplished to be transferred to Within the scope of [A:B] db, there is no problem.
Below illustratively under the non-standard posture of example as shown in Figure 2, the realization principle of MIC denoising algorithm:
VNOICE=VMAIN-VAUX
=(VCALL_MAIN+VNOISE_MAIN)-(VCALL_AUX+VNOISE_AUX)
=(VCALL_MAIN-VCALL_AUX)+(VNOISE_MAIN-VNOISE_AUX)
Wherein, ambient noise VNOISE_MAINAnd VNOISE_AUXSize is essentially identical.So:
VNOICE=VCALL_MAIN-VCALL_AUX
But due to different hand-held postures, it is remote that the distance of main MIC to mouth has change, and then leads to VCALL_MAIN Different degrees of becomes smaller.And the variation of the auxiliary relative position MIC is smaller, so VCALL_AUXSubstantially do not change.So: VNOICE= VCALL_MAIN-VCALL_AUX, this difference is also different degrees of to become smaller, and under certain postures, difference will not be fallen within the scope of [A:B] db.
It can be seen that from above-mentioned introduction since under the hand-held posture of difference, there are notable differences for the frequency response curve of main MIC.It is existing Method be using fixed noise reduction parameters, i.e., can only be to VCALL_MAINAnd VCALL_AUXGain carry out whole promotion or decaying.
For example, carrying out noise reduction using fixed noise reduction parameters 1 for different hand-held postures.At this point, from such as the following table 1 It arrives, for posture one and posture two, loudness of conversing and noise reduction effect can satisfy requirement.And for posture three and posture four, MIC Loudness is unable to satisfy requirement.
Table 1 is each index parameter table for carrying out noise reduction under different hand-held postures using fixed noise reduction parameters 1
Remarks: VCALL_MAIN and VCALL_AUX numerical value in table chooses the representative value of frequency response curve, can rough table Reveal the mean difference of two frequency response curve gains.
In another example carrying out noise reduction using fixed noise reduction parameters 2 for different hand-held postures.At this point, from as follows in table 2 It can be seen that call loudness can be met the requirements for four kinds of postures.But noise reduction effect is weakened completely, is not played pre- The purpose of double MIC de-noisings of phase.
Table 2 is each index parameter table for carrying out noise reduction under different hand-held postures using fixed noise reduction parameters 2
Remarks: VCALL_MAIN and VCALL_AUX numerical value in table chooses the representative value of frequency response curve, can rough table Reveal the mean difference of two frequency response curve gains.
In conclusion existing technical solution, due to that the same noise reduction can only be used to join to the entire frequency response curve same time Number variable, therefore will lead to non-standard posture (such as posture three, posture four) or In Call is less than normal or noise reduction effect becomes Difference.On the whole, it cannot be considered in terms of of both In Call and noise reduction effect.
Summary of the invention
Provided herein is a kind of noise-eliminating method and device for realizing mobile terminal, it can solve and hold in call in the related technology In Call the problem of cannot be considered in terms of with noise reduction effect less than normal under non-standard posture.
Disclosed herein is a kind of noise-eliminating methods for realizing mobile terminal, comprising:
When mobile terminal enters hand-held call mode, the current posture information of acquisition mobile terminal；
It is called from the noise reduction parameters calibration data base pre-established corresponding with the current posture information of the mobile terminal Noise reduction parameters configuration file, according to the noise reduction parameters configuration file called to the dual microphone MIC of the mobile terminal into The amendment of row audio and noise reduction process.
Optionally, in the above method, the noise reduction parameters calibration data base is at least stored with to be believed with the posture of mobile terminal One-to-one noise reduction parameters configuration file is ceased, the posture information includes the posture coordinate data of mobile terminal, each posture letter Ceasing corresponding noise reduction parameters configuration file includes that the multiple parameters under this posture information for audio amendment and noise reduction process are repaired Positive variable.
Optionally, the above method further include: the noise reduction parameters calibration data base is pre-generated, wherein being divided into:
The various posture coordinate datas of mobile terminal are acquired, test mobile terminal is main and auxiliary under various posture coordinate datas The audio data of microphone MIC generates the frequency response curve data of the main and auxiliary MIC under different posture coordinate datas；
In the frequency response curve data of main and auxiliary MIC generated, multiple typical frequency points are chosen, for selected typical case Parameters revision variable is set separately in frequency point, and each posture coordinate data multiple parameters amendment variable corresponding with its is fitted life At noise reduction parameters configuration file and store.
Optionally, in the above method, the various posture coordinate datas of the acquisition mobile terminal include:
The various posture coordinate datas of the mobile terminal are acquired by aspect sensor.
Optionally, in the above method, the aspect sensor includes acceleration biography and gyroscope.
There is disclosed herein a kind of noise cancellation apparatus for realizing mobile terminal, comprising:
Acquisition unit, when mobile terminal enters hand-held call mode, the current posture information of acquisition mobile terminal；
Noise reduction processing unit is called from the noise reduction parameters calibration data base pre-established current with the mobile terminal The corresponding noise reduction parameters configuration file of posture information, according to the noise reduction parameters configuration file called to the double of the mobile terminal Microphone MIC carries out audio amendment and noise reduction process.
Optionally, in above-mentioned apparatus, the noise reduction parameters calibration data base is at least stored with to be believed with the posture of mobile terminal One-to-one noise reduction parameters configuration file is ceased, the posture information includes the posture coordinate data of mobile terminal, each posture letter Ceasing corresponding noise reduction parameters configuration file includes that the multiple parameters under this posture information for audio amendment and noise reduction process are repaired Positive variable.
Optionally, above-mentioned apparatus further includes noise reduction parameters calibration data base generation unit, the noise reduction parameters calibration data Library generation unit is divided into audio data test macro, audio frequency parameter correction module and noise reduction parameters calibration module；
The audio data test macro, in the mobile terminal that the acquisition unit acquires under various posture coordinate datas The audio data for testing main and auxiliary microphone MIC generates the frequency response curve data of the main and auxiliary MIC under different posture coordinate datas；
The audio frequency parameter correction module, in the frequency response curve number for the main and auxiliary MIC that the audio data test macro generates In, multiple typical frequency points are chosen, parameters revision variable is set separately for selected typical frequency point；
The noise reduction parameters calibration module, each posture coordinate data and corresponding multiple ginsengs that the acquisition unit is acquired Number amendment variable, which is fitted, to be generated noise reduction parameters configuration file and stores.
Optionally, in above-mentioned apparatus, the acquisition unit is realized using aspect sensor.
Optionally, in above-mentioned apparatus, the aspect sensor includes acceleration biography and gyroscope.
Technical scheme introduces sensor data acquisition system, is believed by multiple hardwares sensor mobile phone posture Breath is acquired and solidifies, and generates noise reduction parameters configuration file later, for calling when hand-held call, is finally reached in non-standard appearance Reach certain noise reduction effect while improvement In Call problem less than normal under gesture.
Detailed description of the invention
The schematic diagram of standard gestures when Fig. 1 is hand-held call in the prior art；
The schematic diagram of non-standard posture when Fig. 2 is hand-held call in the prior art；
Fig. 3 is the structural block diagram that the noise cancellation apparatus of mobile terminal is realized in the embodiment of the present invention；
Fig. 4 is the present invention in audio lab environment, and the signal of various hand-held postures is simulated using hand-held mode fixture Figure；
Fig. 5 is the schematic diagram that posture coordinate data is generated in the embodiment of the present invention；
Fig. 6 is frequency response curve data figure in the embodiment of the present invention；
Fig. 7 is the curve synoptic diagram in the embodiment of the present invention between posture and parameters revision variable；
Fig. 8 is the flow chart that the denoising of mobile terminal is realized in the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment pair Technical solution of the present invention is described in further detail.It should be noted that in the absence of conflict, embodiments herein and Feature in embodiment can be arbitrarily combined with each other.
In the related technology, it holds in communication process, if user holds the non-standard posture of mobile phone and the appearance of standard gestures When state difference is larger, it will lead to In Call and reduce the feelings that these two aspects problem is deteriorated and can not improved simultaneously with noise reduction effect Condition.For this problem, present inventor proposes that mobile phone posture information is acquired and consolidates when can hold posture to difference Changing, pre-generate different noise reduction parameters configuration files, being called when for holding call, is finally reached and solves under non-standard posture, Noise reduction is realized while improving In Call.
Based on above-mentioned thought, the present embodiment provides a kind of noise-eliminating methods for realizing mobile terminal, specifically include that
When mobile terminal enters hand-held call mode, the current posture information of acquisition mobile terminal；
It is called from the noise reduction parameters calibration data base pre-established corresponding with the current posture information of the mobile terminal Noise reduction parameters configuration file；
According to the noise reduction parameters configuration file called to the dual microphone MIC of the mobile terminal carry out audio amendment and Noise reduction process.
Wherein, the posture information and noise reduction of mobile terminal are at least stored in pre-generated noise reduction parameters calibration data base One-to-one relationship between parameter configuration files, wherein posture information includes the posture coordinate data of mobile terminal, right with it The noise reduction parameters configuration file answered includes the multiple parameters amendment change that audio amendment and noise reduction process are carried out under this posture information Amount.
In addition, based on the above method, can also pre-generate noise reduction parameters calibration data base, this process is as follows:
The various posture coordinate datas of memory mobile terminal are acquired, test mobile terminal under various posture coordinate datas The audio data of main and auxiliary microphone MIC, the frequency response curve data for generating main MIC and auxiliary MIC are stored；
According to the frequency response curve data of main MIC generated and auxiliary MIC, multiple typical frequency points are chosen, for selected Parameters revision variable is set separately in frequency point, generates noise reduction parameters configuration file and is stored.
In practical application, when acquiring the various posture coordinate datas of mobile terminal according to the method described above, orientation can be passed through Sensor, such as acceleration biography, gyroscope etc. are acquired the various posture coordinate datas of mobile terminal.
Below with reference to the specific implementation of each Detailed description of the invention above scheme.
A kind of noise cancellation apparatus for realizing mobile terminal, including acquisition unit and noise reduction processing unit.
Acquisition unit, when mobile terminal enters hand-held call mode, the current posture information of acquisition mobile terminal is (specific Including posture coordinate data).
Noise reduction processing unit is called and the current posture number of coordinates of mobile terminal from the noise reduction parameters calibration data base According to corresponding noise reduction parameters configuration file, by the noise reduction parameters configuration file of calling to mobile terminal to the mobile terminal Dual microphone MIC carries out audio amendment and noise reduction process.
The frequency response curve of main MIC and auxiliary MIC are modified in each frequency point, realize that main MIC and auxiliary MIC frequency response curve are supplied Noise reduction in communication process calculates.
Wherein, pre-generated noise reduction parameters calibration data base, be at least stored with the posture coordinate data of mobile terminal with One-to-one relationship between noise reduction parameters configuration file；Posture information includes the posture coordinate data of mobile terminal, right with it The noise reduction parameters configuration file answered includes the multiple parameters amendment change that audio amendment and noise reduction process are carried out under this posture information Amount.
Optionally, above-mentioned apparatus may include having noise reduction parameters calibration data base generation unit, and this element includes such as Fig. 3 institute Show, including audio data test macro, audio frequency parameter correction module and noise reduction parameters calibration module.Audio data test macro is logical It crosses audio frequency parameter correction module to be connected with noise reduction parameters calibration module, acquisition unit is directly connected with noise reduction parameters calibration module.
Wherein, audio data test macro, in audio lab environment, using hand-held mode fixture, as shown in figure 4, Under various postures, the frequency response curve data of main MIC and auxiliary MIC are measured and recorded.
Acquisition unit (specifically can be described as mobile phone posture coordinate acquisition module), in audio lab environment, using hand-held Mode fixture acquires the seat of mobile phone spatial attitude by acceleration transducer and gyro sensor under various mobile phone postures Mark, the process for producing posture coordinate data are as shown in Figure 5.
Audio frequency parameter correction module, the frequency response curve data measured by audio data test macro, as shown in fig. 6, On frequency response curve, typical frequency point is chosen, appropriate amendment is carried out to main MIC gain and auxiliary MIC gain respectively, then records each allusion quotation On type frequency point, the parameters revision variable Δ that needs to adjust.
Posture coordinate data and parameters revision variable Δ are fitted by noise reduction parameters calibration module.
By taking mobile phone posture 1~6 as an example, due to testing completion in advance, posture coordinate can be directly found according to test data Data and parameters revision variable Δ are fitted, and the curve data after fitting is as shown in Figure 7.
By taking mobile phone posture 7~8 as an example, since posture 7 and posture 3,4 are very close, posture 8 and posture 5,6 are very close. It is obtained so the parameters revision variable Δ of posture 7 can be calculated by the parameters revision variable Δ of posture 3,4 come local linearization.Appearance The calculating of the parameters revision variable Δ of state 8 is similarly.
Above-mentioned four part of module is combined, can accurately be completed under different mobile phone postures, sound intensity of conversing It is promoted simultaneously with noise reduction effect.
Below by table 3 it can be seen that the advantage of technical solution of the present invention:
Table 3 is each parameter list that denoising is carried out using technical scheme
A kind of noise-eliminating method for realizing mobile terminal, as shown in figure 8, noise-reduction method process is specific under hand-held talking state Are as follows:
Step S801: the posture coordinate data of mobile phone is acquired by aspect sensors such as acceleration biography, gyroscopes.
Step S802: by audio lab environment, under different mobile phone postures (i.e. different posture coordinate datas), The audio data for testing main and auxiliary MIC generates the frequency response curve data of main MIC and auxiliary MIC.
Step S803: according to the frequency response curve data of main MIC and auxiliary MIC, multiple typical frequency points are chosen, for each typical frequency Parameters revision variable is set separately in point, generates noise reduction parameters configuration file.Step S804: pass through above-mentioned posture coordinate data, frequency Ring curve data, noise reduction parameters configuration file is fitted, generation noise reduction parameters calibration data base.
It should be noted that the posture coordinate data being referred to herein, frequency response curve data and noise reduction parameters configuration file are One-to-one relationship.
Whether step S805: entering hand-held call mode, if so, entering in next step, otherwise it is assumed that being other call moulds Formula terminates this process.
Step S806: under hand-held call mode, whether in the reasonable scope hand-held posture is judged, if so, into next The judgement of step S807 holds otherwise it is assumed that being detached from, terminates this process.
In the step, under hand-held call mode, it is blocked if proximity sensor can detecte, illustrates mobile phone user's Hand-held posture is in the reasonable scope.Present document relates to zone of reasonableness include standard handheld posture and non-standard hand-held posture.
Step S807: user enters hand-held call mode, the current posture coordinate data of acquisition mobile phone；
Step S808: calling corresponding noise reduction parameters configuration file according to the posture coordinate data of acquisition, to main MIC and auxiliary The frequency response curve of MIC is modified in each frequency point.
Step S809: auxiliary MIC frequency response curve is advocated peace for the noise reduction algorithm realization noise reduction process in communication process using optimization.
From above-described embodiment as can be seen that mobile phone posture information carries out when technical scheme is for different hand-held postures Acquisition and solidification, pre-generate different noise reduction parameters configuration files, and for calling when hand-held call, it is non-standard to be finally reached solution Under posture, noise reduction is realized while improving In Call.Wherein, when the noise reduction parameters configuration file of generation, for different hands The multiple typical frequency points for holding the frequency response curve data of main MIC and auxiliary MIC under posture, are set separately parameters revision variable, i.e., at certain It is modified at the same time it can also the different parameters revision of utilization using different parameters revision variable progress audios under one hand-held posture Variable reaches noise reduction process, to reach certain noise reduction effect while improvement In Call problem less than normal.
Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be instructed by program Related hardware is completed, and described program can store in computer readable storage medium, such as read-only memory, disk or CD Deng.Optionally, one or more integrated circuits can be used also to realize in all or part of the steps of above-described embodiment.Accordingly Ground, each module/unit in above-described embodiment can take the form of hardware realization, can also use the shape of software function module Formula is realized.The application is not limited to the combination of the hardware and software of any particular form.
The above, preferred embodiments only of the invention, is not intended to limit the scope of the present invention.It is all this Within the spirit and principle of invention, any modification, equivalent substitution, improvement and etc. done should be included in protection model of the invention Within enclosing.

Claims (10)

1. a kind of noise-eliminating method for realizing mobile terminal, comprising:
When mobile terminal enters hand-held call mode, the current posture information of acquisition mobile terminal；
Drop corresponding with the current posture information of the mobile terminal is called from the noise reduction parameters calibration data base pre-established It makes an uproar parameter configuration files, carries out sound according to dual microphone MIC of the noise reduction parameters configuration file called to the mobile terminal Frequency amendment and noise reduction process.
2. the method as described in claim 1, which is characterized in that the noise reduction parameters calibration data base is at least stored with and movement The one-to-one noise reduction parameters configuration file of the posture information of terminal, the posture information include the posture number of coordinates of mobile terminal According to the corresponding noise reduction parameters configuration file of each posture information includes under this posture information for audio amendment and noise reduction process Multiple parameters correct variable.
3. method according to claim 2, which is characterized in that the method also includes: pre-generate the noise reduction parameters school Quasi- database, wherein being divided into:
The various posture coordinate datas of mobile terminal are acquired, mobile terminal main and auxiliary Mike under various posture coordinate datas is tested The audio data of wind MIC generates the frequency response curve data of the main and auxiliary MIC under different posture coordinate datas；
In the frequency response curve data of main and auxiliary MIC generated, multiple typical frequency points are chosen, for selected typical frequency point Parameters revision variable is set separately, each posture coordinate data multiple parameters amendment variable corresponding with its is fitted generation drop Parameter configuration files of making an uproar simultaneously store.
4. method as claimed in claim 2 or claim 3, which is characterized in that the various posture coordinate datas of the acquisition mobile terminal Include:
The various posture coordinate datas of the mobile terminal are acquired by aspect sensor.
5. method as claimed in claim 4, which is characterized in that the aspect sensor includes acceleration biography and gyroscope.
6. a kind of noise cancellation apparatus for realizing mobile terminal, comprising:
Acquisition unit, when mobile terminal enters hand-held call mode, the current posture information of acquisition mobile terminal；
Noise reduction processing unit is called and the current posture of the mobile terminal from the noise reduction parameters calibration data base pre-established The corresponding noise reduction parameters configuration file of information, according to the noise reduction parameters configuration file called to the diamylose gram of the mobile terminal Wind MIC carries out audio amendment and noise reduction process.
7. device as claimed in claim 6, which is characterized in that the noise reduction parameters calibration data base is at least stored with and movement The one-to-one noise reduction parameters configuration file of the posture information of terminal, the posture information include the posture number of coordinates of mobile terminal According to the corresponding noise reduction parameters configuration file of each posture information includes under this posture information for audio amendment and noise reduction process Multiple parameters correct variable.
8. device as claimed in claim 7, which is characterized in that it further include noise reduction parameters calibration data base generation unit, it is described Noise reduction parameters calibration data base generation unit is divided into audio data test macro, audio frequency parameter correction module and noise reduction parameters calibration Module；
The audio data test macro is tested under various posture coordinate datas in the mobile terminal of acquisition unit acquisition The audio data of main and auxiliary microphone MIC generates the frequency response curve data of the main and auxiliary MIC under different posture coordinate datas；
The audio frequency parameter correction module, in the frequency response curve data for the main and auxiliary MIC that the audio data test macro generates In, multiple typical frequency points are chosen, parameters revision variable is set separately for selected typical frequency point；
The noise reduction parameters calibration module repairs each posture coordinate data that the acquisition unit acquires and corresponding multiple parameters Positive variable, which is fitted, to be generated noise reduction parameters configuration file and stores.
9. such as the described in any item devices of claim 6-8, which is characterized in that the acquisition unit is real using aspect sensor It is existing.
10. device as claimed in claim 9, which is characterized in that the aspect sensor includes acceleration biography and gyroscope.
CN201710709083.5A 2017-08-17 2017-08-17 A kind of noise-eliminating method and device for realizing mobile terminal Pending CN109413253A (en)

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