CN106302906A - A kind of diamylose gram noise-reduction method and device, a kind of mobile terminal - Google Patents
A kind of diamylose gram noise-reduction method and device, a kind of mobile terminal Download PDFInfo
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- CN106302906A CN106302906A CN201610826711.3A CN201610826711A CN106302906A CN 106302906 A CN106302906 A CN 106302906A CN 201610826711 A CN201610826711 A CN 201610826711A CN 106302906 A CN106302906 A CN 106302906A
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- 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
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- 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
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
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- 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
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
- G10L2021/02165—Two microphones, one receiving mainly the noise signal and the other one mainly the speech signal
Abstract
The invention provides a kind of diamylose gram noise-reduction method and device, a kind of mobile terminal, wherein, this diamylose gram noise-reduction method includes: S10 gathers the first acoustical signal by main Mike, secondary Mike gathers second sound signal；The difference in magnitude of the first acoustical signal and second sound signal is compared by S20 with default difference in magnitude；The signal to noise ratio of the first acoustical signal, based on the comparison result in step S20, is compared by S30 with default signal to noise ratio；S40 is based on the comparison result in step S30, default difference in magnitude is adjusted, to reduce the de-noising degree of diamylose gram equipment, evade with this change because user grips the position of mobile phone, there is the phenomenon of the failure of distortion in ascending voice signal that the factor such as the seal difference of monomer Mike's difference, audio cavity structure and other path attenuation difference causes, improves audio identification efficiency.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of diamylose gram noise-reduction method and device thereof, further relate to one
Mobile terminal.
Background technology
Along with the continuous lifting of handset capability, user is more and more higher to the requirement of voice call quality.At present, same portion
Include on mobile phone that two Mikes have been universal phenomena, during using diamylose gram to carry out noise reduction, when setting up voice communication
Main Mike and secondary Mike gather the information such as user speech, background noise, echo simultaneously, distinguish useful and garbage with this, are
Whether mobile phone can transmit the key factor of voice the most clearly.
At present, in order to preferably voice signal be carried out diamylose gram noise reduction process, part mobile phone have employed Fluence V5
Noise reduction techniques processes, and the amplitude of the voice signal of upper to main Mike and secondary Mike input is contrasted by it, the most main
The difference of the Amplitude Ration secondary Mike input speech signal amplitude of Mike's input speech signal is more than or equal to 6dB (decibel), could be normal
Recognition of speech signals and noise signal, and then use suppression echo-algorithm, call voice is optimized and ensures.
But, in the situation that the amplitude of main Mike's input speech signal and secondary Mike input speech signal amplitude difference are the least
Under, a lot of suppression parameter can be used to carry out denoising Processing.It is reasonable so to seem, but due to monomer Mike's difference, audio cavity structure
Seal difference and other path attenuation difference, differ less or secondary wheat main Mike and secondary Mike input speech signal amplitude
In the case of gram input speech signal amplitude is relatively big, normal voice messaging can be mistaken for noise and directly eliminate, so, and user
During real speech communication, if the position that user grips mobile phone changes, the noise reference signal of generation will comprise
Efficient voice signal, can directly result in ascending voice signal and occur the phenomenon of the failure of distortion in these grip position, as lost word, leading to
The problems such as words are discontinuous or sound is the least.
Summary of the invention
For the problems referred to above, the invention provides a kind of diamylose gram noise-reduction method and device, a kind of mobile terminal, effectively
Solve in existing diamylose gram equipment and the problem that distortion occurs in ascending voice signal easily occurs.
The technical scheme that the present invention provides is as follows:
A kind of diamylose gram noise-reduction method, is applied to diamylose gram equipment, described diamylose gram equipment at least includes main Mike and
Secondary Mike, described diamylose gram noise-reduction method includes:
S10 gathers the first acoustical signal by main Mike, secondary Mike gathers second sound signal；
The difference in magnitude of the first acoustical signal and second sound signal is compared by S20 with default difference in magnitude；
The signal to noise ratio of the first acoustical signal, based on the comparison result in step S20, is compared by S30 with default signal to noise ratio
Right；
Default difference in magnitude, based on the comparison result in step S30, is adjusted by S40, to reduce disappearing of diamylose gram equipment
Make an uproar degree.
It is further preferred that described first acoustical signal includes first user voice signal and/or ambient noise signal；Institute
State second sound signal and include the second user voice signal and/or ambient noise signal；
Described default difference in magnitude includes first presetting difference in magnitude, second presetting difference in magnitude and the 3rd and preset difference in magnitude, and
First presets difference in magnitude presets difference in magnitude more than second, and second presets difference in magnitude presets difference in magnitude more than the 3rd.
If it is further preferred that the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal
Preset difference in magnitude less than first, preset difference in magnitude more than or equal to second, specifically include the most in step s 30:
Detect in the first acoustical signal that main Mike gathers and whether include first user voice signal；
If including, the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
If the signal to noise ratio of the first acoustical signal is more than presetting signal to noise ratio, specifically include the most in step s 40:
Preset first and be adjusted to the 4th under difference in magnitude and preset difference in magnitude, to reduce the de-noising degree of diamylose gram equipment.
If it is further preferred that the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal
Preset difference in magnitude less than first, preset difference in magnitude more than or equal to second, specifically include the most in step s 30:
Detect in the first acoustical signal that main Mike gathers and whether include first user voice signal；
If including, the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
If the signal to noise ratio of the first acoustical signal is less than presetting signal to noise ratio, specifically include the most in step s 40:
Preset first and be adjusted to the 5th under difference in magnitude and preset difference in magnitude, to reduce the de-noising degree of diamylose gram equipment, wherein,
Described 5th presets difference in magnitude presets difference in magnitude more than the 4th.
If it is further preferred that the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal
Preset difference in magnitude less than second, preset difference in magnitude more than or equal to the 3rd, specifically include the most in step s 30:
Detect in the first acoustical signal that main Mike gathers and whether include first user voice signal；
If including, the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
If the signal to noise ratio of the first acoustical signal is more than presetting signal to noise ratio, specifically include the most in step s 40:
Increase main Mike's gain, preset being adjusted to the 4th under difference in magnitude and preset difference in magnitude, to reduce diamylose gram simultaneously by first
The de-noising degree of equipment.
If it is further preferred that the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal
Preset difference in magnitude less than second, preset difference in magnitude more than or equal to the 3rd, specifically include the most in step s 30:
Detect in the first acoustical signal that main Mike gathers and whether include first user voice signal；
If including, the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
If the signal to noise ratio of the first acoustical signal is more than presetting signal to noise ratio, determine whether whether main Mike has background noise；
If main Mike normally works, specifically include the most in step s 40: increase main Mike's gain, preset first simultaneously
It is adjusted to the 4th under difference in magnitude and presets difference in magnitude, to reduce the de-noising degree of diamylose gram equipment；
If main Mike has background noise, it is adjusted to secondary Mike sounding.
If it is further preferred that the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal
Preset difference in magnitude less than second, preset difference in magnitude more than or equal to the 3rd, specifically include the most in step s 30:
Detect in the first acoustical signal that main Mike gathers and whether include first user voice signal；
If including, the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
If the signal to noise ratio of the first acoustical signal is less than presetting signal to noise ratio, specifically include the most in step s 40:
Increase main Mike's gain, preset being adjusted to the 5th under difference in magnitude and preset difference in magnitude, to reduce diamylose gram simultaneously by first
The de-noising degree of equipment, wherein, the described 5th presets difference in magnitude presets difference in magnitude more than the 4th.
If it is further preferred that the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal
Preset difference in magnitude less than second, preset difference in magnitude more than or equal to the 3rd, specifically include the most in step s 30:
Detect in the first acoustical signal that main Mike gathers and whether include first user voice signal；
If including, the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
If the signal to noise ratio of the first acoustical signal is less than presetting signal to noise ratio, determine whether whether main Mike has background noise；
If main Mike normally works, specifically include the most in step s 40: increase main Mike's gain, preset first simultaneously
Being adjusted to the 5th under difference in magnitude and preset difference in magnitude, to reduce the de-noising degree of diamylose gram equipment, wherein, the described 5th presets difference in magnitude
Difference in magnitude is preset more than the 4th；
If main Mike has background noise, it is adjusted to secondary Mike sounding.
If it is further preferred that the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal
Preset difference in magnitude less than the 3rd, then main Mike and secondary Mike position are switched over, include the most in step s 30: by the rising tone
The signal to noise ratio of tone signal is compared with default signal to noise ratio.
Present invention also offers a kind of diamylose gram denoising device, be applied to diamylose gram equipment, in described diamylose gram equipment extremely
Include that main Mike and secondary Mike, described diamylose gram denoising device include less:
Sound acquisition module, for gathering the first acoustical signal by main Mike, secondary Mike gathers second sound signal；
Judge module, for comparing the difference in magnitude of the first acoustical signal and second sound signal with default difference in magnitude
Right, and the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
Difference in magnitude adjusting module, for the comparison result of the signal to noise ratio according to the first acoustical signal with default noise, in advance
If difference in magnitude is adjusted.
It is further preferred that described judge module is additionally operable to judge whether include background noise in main Mike；And/or,
Described diamylose gram denoising device also includes gain regulation module, for according to the signal to noise ratio of the first acoustical signal with
Preset the comparison result of noise, adjust the gain of main Mike.
It is further preferred that described diamylose gram denoising device also includes Mike's handover module, for according in main Mike
Whether include that main Mike and secondary Mike are switched over by background noise, and according to the first acoustical signal and the width of second sound signal
Main Mike and secondary Mike are switched over by value difference with the comparison result of default difference in magnitude.
Present invention also offers a kind of mobile terminal, described mobile terminal at least includes main Mike and secondary Mike, wherein,
Main Mike is located at the bottom of fuselage, and secondary Mike is located at top or the back side of fuselage, also includes above-mentioned diamylose in described mobile terminal
Gram denoising device.
Compared with prior art, the beneficial effects of the present invention is:
In the diamylose gram noise-reduction method and device of present invention offer, by the first acoustical signal collected and the second sound
The difference in magnitude of signal is compared with default difference in magnitude, and is compared with default signal to noise ratio by the first acoustical signal, and according to
Default difference in magnitude is adjusted by comparison result, is adjusted corresponding noise reduction algorithm, evades because user grips mobile phone with this
Position change, the factor such as the seal difference of monomer Mike's difference, audio cavity structure and other path attenuation difference causes
Ascending voice signal the phenomenon of the failure of distortion occurs, improve audio identification efficiency.Combined debugging noise suppression algorithm and voice
Recognizer preferably carries out voice transfer, improves diamylose gram equipment performance.
Accompanying drawing explanation
Below by the way of the most understandable, accompanying drawings preferred implementation, to above-mentioned characteristic, technical characteristic,
Advantage and implementation thereof are further described.
Fig. 1 is diamylose gram noise-reduction method schematic flow sheet in the present invention；
Fig. 2 is diamylose gram denoising device one embodiment schematic diagram in the present invention；
Fig. 3 is diamylose gram denoising device another embodiment schematic diagram in the present invention；
Fig. 4 is diamylose gram denoising device another embodiment schematic diagram in the present invention.
Drawing reference numeral illustrates:
100-diamylose gram denoising device, 110-sound acquisition module, 120-judge module, 130-difference in magnitude adjusting module,
140-gain regulation module, 150-Mike's handover module.
Detailed description of the invention
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will comparison accompanying drawing explanation
The detailed description of the invention of the present invention.It should be evident that the accompanying drawing in describing below is only some embodiments of the present invention, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing, and obtain other embodiment.
Being illustrated in figure 1 the diamylose gram noise-reduction method schematic flow sheet that the present invention provides, this diamylose gram noise-reduction method is applied
In diamylose gram equipment (at least including main Mike and secondary Mike), it can be seen that include at this diamylose gram noise-reduction method:
S10 gathers the first acoustical signal by main Mike, secondary Mike gathers second sound signal；S20 is by the first acoustical signal and second
The difference in magnitude of acoustical signal is compared with default difference in magnitude；S30 is based on the comparison result in step S20, by the first sound letter
Number signal to noise ratio compare with default signal to noise ratio；Default difference in magnitude, based on the comparison result in step S30, is adjusted by S40
Whole, to reduce the de-noising degree of diamylose gram equipment.
Specifically, main Mike is arranged at (the specially end of diamylose gram equipment, position of diamylose gram equipment normal talking
End), secondary Mike is arranged at top or back (the having certain distance with main Mike, as at a distance of 5cm etc.) of diamylose gram equipment.And first
Acoustical signal includes first user voice signal and/or ambient noise signal；Two acoustical signals include the second user voice signal
And/or ambient noise signal；Default difference in magnitude includes first presetting difference in magnitude, second presetting difference in magnitude and the 3rd and preset amplitude
Difference, and first preset difference in magnitude and preset difference in magnitude more than second, second presets difference in magnitude presets difference in magnitude more than the 3rd.
In one embodiment, the comparison result of step S20 is the amplitude of the first acoustical signal and second sound signal
Difference presets difference in magnitude more than or equal to first, illustrates that the first user voice signal that the most main Mike collects is relatively strong, and secondary Mike adopts
The second user voice signal that collection arrives is more weak, for background noise, and the basic phase of signal that main Mike and secondary Mike collect
With.Thus in the present embodiment, first user voice signal can be regarded as user voice signal, by the second user speech
Signal is ignored, and obtains ambient noise signal with this.Specifically, in the signal processor in diamylose gram equipment, by the rising tone
Tone signal is converted into contrary signal, is overlapped offsetting with the first acoustical signal, obtains user voice signal.
In a specific embodiment, above-mentioned first to preset difference in magnitude be 6dB, the i.e. first acoustical signal and rising tone message
Number difference in magnitude L >=6dB, processor in diamylose gram equipment uses Fluence V5 algorithm to be turned by the sound wave of second sound signal
Change contrary sound wave into and the sound wave with the first acoustical signal is overlapped offsetting, obtain the first user voice that main Mike receives
Signal (above-mentioned user voice signal).In other embodiments, first here presets difference in magnitude can also be set as other values,
As set it to 5dB, 4dB etc., it is set according to practical situation；Additionally processor can also use other algorithms to carry out
Noise reduction.
In one embodiment, the comparison result of step S20 is the amplitude of the first acoustical signal and second sound signal
Difference is less than first presetting difference in magnitude, presetting difference in magnitude more than or equal to second, the most in step s 30: detect that main Mike gathers the
Whether one acoustical signal includes first user voice signal；If detecting, the first acoustical signal includes that first user voice is believed
Number, with will the signal to noise ratio of the first acoustical signal compare with default signal to noise ratio.If the result of signal to noise ratio comparison is first
The signal to noise ratio of acoustical signal, more than presetting signal to noise ratio, presets being adjusted to the 4th under difference in magnitude and preset width the most in step s 40 by first
Value difference, to reduce the de-noising degree of diamylose gram equipment so that more voice signal can pass through, in order to avoid losing efficient voice letter
Number.If further, the signal to noise ratio of the first acoustical signal is less than presetting signal to noise ratio, the most in step s 40: preset difference in magnitude by first
Under be adjusted to the 5th and preset difference in magnitude, to reduce the de-noising degree of diamylose gram equipment, wherein, the 5th to preset difference in magnitude pre-more than the 4th
If difference in magnitude.
In a specific embodiment, above-mentioned first to preset difference in magnitude be 6dB, and second to preset difference in magnitude be 3dB, i.e. comparison
Result is: 6dB ＞ the first acoustical signal and the difference in magnitude L >=3dB of second sound signal, and the 4th to preset difference in magnitude be 4dB, the 5th
Default difference in magnitude is 5dB, and presetting signal to noise ratio A is 80dB, the most in the present embodiment: if the signal to noise ratio of the first acoustical signal is more than
80dB, presets being adjusted to the 4th under difference in magnitude 6dB and preset difference in magnitude 4dB by first；If the signal to noise ratio of the first acoustical signal is less than
80dB, presets being adjusted to the 5th under difference in magnitude 6dB and preset difference in magnitude 5dB by first.In other embodiments, above-mentioned first width is preset
Value, second preset amplitude, the 4th preset amplitude, the 5th preset amplitude and default noise ratio can be set as according to practical situation
Other values, as being 70dB, 90dB etc. by default signal-to-noise ratio settings, preset amplitude by second and are set as 4dB, 5dB etc., do not do at this
Concrete restriction, if the qualifications met in present embodiment.
In one embodiment, the comparison result of step S20 is the amplitude of the first acoustical signal and second sound signal
Difference is preset difference in magnitude less than second, is preset difference in magnitude more than or equal to the 3rd, then in step S30: detect the first of main Mike collection
Whether acoustical signal includes first user voice signal；If detecting, the first acoustical signal includes that first user voice is believed
Number, with will the signal to noise ratio of the first acoustical signal compare with default signal to noise ratio.If the result of signal to noise ratio comparison is first
The signal to noise ratio of acoustical signal is more than presetting signal to noise ratio, the most in step s 40: increase main Mike's gain, preset width by first simultaneously
It is adjusted to the 4th under value difference and presets difference in magnitude, to reduce the de-noising degree of diamylose gram equipment.If the signal to noise ratio of the first acoustical signal is little
In default signal to noise ratio, the most in step s 40: increase main Mike's gain, preset first simultaneously and be adjusted to the 5th under difference in magnitude and preset
Difference in magnitude, to reduce the de-noising degree of diamylose gram equipment, wherein, the 5th presets difference in magnitude presets difference in magnitude more than the 4th.
In a specific embodiment, above-mentioned second to preset difference in magnitude be 3dB, and the 3rd to preset difference in magnitude be 0dB, i.e. comparison
Result is: 3dB ＞ the first acoustical signal and the difference in magnitude L >=0dB of second sound signal, and the 4th to preset difference in magnitude be 4dB, the 5th
Default difference in magnitude is 5dB, and presetting signal to noise ratio A is 80dB, the most in the present embodiment: if the signal to noise ratio of the first acoustical signal is more than
80dB, suitably increases main Mike's gain, presets being adjusted to the 4th under difference in magnitude 6dB and preset difference in magnitude 4dB by first simultaneously；If first
The signal to noise ratio of acoustical signal is less than 80dB, suitably increases main Mike's gain, presets first simultaneously and be adjusted to the 5th under difference in magnitude 6dB
Preset difference in magnitude 5dB.In other embodiments, above-mentioned second preset amplitude, the 3rd preset amplitude, the 4th preset amplitude, the 5th
Preset amplitude and default noise ratio and can be set as other values according to practical situation, as by default signal-to-noise ratio settings be 70dB,
90dB etc., preset amplitude by second and are set as 4dB, 5dB etc., be not specifically limited at this, as long as meeting in present embodiment
Qualifications.
In one embodiment, the comparison result of step S20 is the amplitude of the first acoustical signal and second sound signal
Difference is preset difference in magnitude less than second, is preset difference in magnitude more than or equal to the 3rd, then in step S30: detect the first of main Mike collection
Whether acoustical signal includes first user voice signal；If detecting, the first acoustical signal includes that first user voice is believed
Number, with will the signal to noise ratio of the first acoustical signal compare with default signal to noise ratio.If the result of signal to noise ratio comparison is first
The signal to noise ratio of acoustical signal more than presetting signal to noise ratio, then determines whether whether main Mike has background noise, if main Mike is normal
Work, the most in step s 40: increase main Mike's gain, presets being adjusted to the 4th under difference in magnitude and preset difference in magnitude simultaneously by first, with
Reduce the de-noising degree of diamylose gram equipment.If the signal to noise ratio of the first acoustical signal is less than presetting signal to noise ratio, the most in step s 40:
Increase main Mike's gain, preset being adjusted to the 5th under difference in magnitude and preset difference in magnitude, to reduce disappearing of diamylose gram equipment simultaneously by first
Making an uproar degree, wherein, the 5th presets difference in magnitude presets difference in magnitude more than the 4th.If judging that main Mike has background noise, adjust
For secondary Mike sounding.
In a specific embodiment, above-mentioned second to preset difference in magnitude be 3dB, and the 3rd to preset difference in magnitude be 0dB, i.e. comparison
Result is: 3dB ＞ the first acoustical signal and the difference in magnitude L >=0dB of second sound signal, and the 4th to preset difference in magnitude be 4dB, the 5th
Default difference in magnitude is 5dB, and presetting signal to noise ratio A is 80dB, the most in the present embodiment: if the signal to noise ratio of the first acoustical signal is more than
80dB, then determine whether whether main Mike has background noise, if main Mike normally works, then suitably increases main Mike's gain,
Preset first simultaneously and be adjusted to the 4th under difference in magnitude 6dB and preset difference in magnitude 4dB；If the signal to noise ratio of the first acoustical signal is less than
80dB, then determine whether whether main Mike has background noise, if main Mike normally works, then suitably increases main Mike's gain,
Preset first simultaneously and be adjusted to the 5th under difference in magnitude 6dB and preset difference in magnitude 5dB.If judging that main Mike has background noise, adjust
Whole for secondary Mike sounding.In other embodiments, above-mentioned second preset amplitude, the 3rd preset amplitude, the 4th preset amplitude, the 5th
Preset amplitude and default noise ratio and can be set as other values according to practical situation, as by default signal-to-noise ratio settings be 70dB,
90dB etc., preset amplitude by second and are set as 4dB, 5dB etc., be not specifically limited at this, as long as meeting in present embodiment
Qualifications.
In one embodiment, if the width that the comparison result of step S20 is the first acoustical signal and second sound signal
Value difference presets difference in magnitude less than the 3rd, then main Mike and secondary Mike position are switched over, illustrate what the most main Mike collected
Second user voice signal is relatively strong, and the first user voice signal that secondary Mike collects is more weak, the most in step s 30: by second
The signal to noise ratio of acoustical signal is compared with default signal to noise ratio.Follow-up judgement step and the comparison process of aforementioned first acoustical signal
Identical, do not repeat at this.
In a specific embodiment, the above-mentioned 3rd to preset difference in magnitude be 0dB, i.e. comparison result is: the first acoustical signal
With the difference in magnitude L ＜ 0dB of second sound signal, now explanation second sound signal is stronger than the first acoustical signal, the most directly closes
Main Mike, uses secondary Mike to carry out voice collecting.
It is illustrated in figure 2 the diamylose gram denoising device one embodiment schematic diagram that the present invention provides, is applied to above-mentioned double
Mike's noise-reduction method, this diamylose gram denoising device be applied in diamylose gram equipment, and diamylose gram equipment at least to include main Mike and
Secondary Mike, it can be seen that include at this diamylose gram denoising device 100: sound acquisition module 110, judge module 120
And difference in magnitude adjusting module 130, wherein, it is judged that module 120 is connected with sound acquisition module 110, difference in magnitude adjusting module 130
It is connected with judge module 120.
In the course of the work, first, sound acquisition module 110 gathers the first acoustical signal by main Mike, secondary Mike adopts
The acoustical signal collected also is sent to judge module 120 by collection second sound signal；Judge module 120 receives acoustical signal
Afterwards, with will the difference in magnitude of the first acoustical signal and second sound signal compare with default difference in magnitude, and according to amplitude
The signal to noise ratio of the first acoustical signal is compared by the comparison result of difference further with default signal to noise ratio；Finally, difference in magnitude adjusts
The module 130 signal to noise ratio according to the first acoustical signal and the comparison result of default noise, be adjusted default difference in magnitude, with fall
The de-noising degree of low diamylose gram equipment.
Specifically, main Mike is arranged at (the specially end of diamylose gram equipment, position of diamylose gram equipment normal talking
End), secondary Mike is arranged at top or back (the having certain distance with main Mike, as at a distance of 5cm etc.) of diamylose gram equipment.And first
Acoustical signal includes first user voice signal and/or ambient noise signal；Two acoustical signals include the second user voice signal
And/or ambient noise signal；Default difference in magnitude includes first presetting difference in magnitude, second presetting difference in magnitude and the 3rd and preset amplitude
Difference, and first preset difference in magnitude and preset difference in magnitude more than second, second presets difference in magnitude presets difference in magnitude more than the 3rd.
In one embodiment, if the comparison result of difference in magnitude is the first acoustical signal and second in judge module 120
The difference in magnitude of acoustical signal presets difference in magnitude more than or equal to first, and the first user voice signal that the most main Mike collects is described
Relatively strong, the second user voice signal that secondary Mike collects is more weak, and for background noise, main Mike and secondary Mike collect
Signal essentially identical.Thus in the present embodiment, first user voice signal can be regarded as user voice signal, general
Second user voice signal is ignored, and obtains ambient noise signal with this.Specifically, the signal processor in diamylose gram equipment
In, second sound signal is converted into contrary signal, is overlapped offsetting with the first acoustical signal, obtain user speech letter
Number, the most do not do follow-up judgement, the most uncomfortable view picture value difference.
In a specific embodiment, above-mentioned first to preset difference in magnitude be 6dB, i.e. the comparison result of judge module 120 is
Difference in magnitude L of the first acoustical signal and second sound signal >=6dB, the processor in diamylose gram equipment uses Fluence V5 to calculate
The sound wave of second sound signal is converted into contrary sound wave by method and the sound wave with the first acoustical signal is overlapped offsetting, and is led
The first user voice signal (above-mentioned user voice signal) that Mike receives.
In one embodiment, diamylose gram denoising device 100 also includes a detection module.Specifically, if judge module
In 120 the comparison result of difference in magnitude be the first acoustical signal and second sound signal difference in magnitude less than first preset difference in magnitude,
Preset difference in magnitude more than or equal to second, then whether detection module includes in detecting the first acoustical signal that main Mike gathers further
First user voice signal；If detecting, the first acoustical signal includes first user voice signal, and judge module 120 will immediately
The signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio.If the result of signal to noise ratio comparison is the first acoustical signal
Signal to noise ratio is more than presetting signal to noise ratio, then difference in magnitude adjusting module 130 is preset first and is adjusted to the 4th under difference in magnitude and presets difference in magnitude,
To reduce the de-noising degree of diamylose gram equipment so that more voice signal can pass through, in order to avoid losing efficient voice signal.Again
Having, if the signal to noise ratio of the first acoustical signal is less than presetting signal to noise ratio, then difference in magnitude adjusting module 130 presets difference in magnitude by first
Under be adjusted to the 5th and preset difference in magnitude, to reduce the de-noising degree of diamylose gram equipment, wherein, the 5th to preset difference in magnitude pre-more than the 4th
If difference in magnitude.
In a specific embodiment, above-mentioned first to preset difference in magnitude be 6dB, and second to preset difference in magnitude be 3dB, i.e. judges
The comparison result of module 120 is: 6dB ＞ the first acoustical signal and the difference in magnitude L >=3dB of second sound signal, the 4th presets width
Value difference is 4dB, and the 5th to preset difference in magnitude be 5dB, and presetting signal to noise ratio A is 80dB, the most in the present embodiment: if judge module 120
The signal to noise ratio that comparison result is the first acoustical signal more than 80dB, difference in magnitude adjusting module 130 first is preset difference in magnitude 6dB
Under be adjusted to the 4th and preset difference in magnitude 4dB；If the signal to noise ratio that the comparison result of judge module 120 is the first acoustical signal is less than
80dB, difference in magnitude adjusting module 130 is preset first and is adjusted to the 5th under difference in magnitude 6dB and presets difference in magnitude 5dB.
It is illustrated in figure 3 the diamylose gram denoising device another embodiment schematic diagram that the present invention provides, permissible from figure
Find out, in this diamylose gram denoising device 100, also include gain regulation module 140, for the noise according to the first acoustical signal
Than the comparison result with default noise, adjust the gain of main Mike.
Specifically, if the comparison result of difference in magnitude is the width of the first acoustical signal and second sound signal in judge module 120
Value difference is preset difference in magnitude less than second, is preset difference in magnitude more than or equal to the 3rd, then detection module detects main Mike collection further
The first acoustical signal in whether include first user voice signal；If detecting, the first acoustical signal includes first user language
Tone signal, the signal to noise ratio of the first acoustical signal is compared by judge module 120 with default signal to noise ratio immediately.If signal to noise ratio ratio
To the signal to noise ratio that result is the first acoustical signal more than preset signal to noise ratio, then gain regulation module 140 increases main Mike's gain,
Difference in magnitude adjusting module 130 is preset first and is adjusted to the 4th under difference in magnitude and presets difference in magnitude, to reduce diamylose gram equipment simultaneously
De-noising degree.If the signal to noise ratio of the first acoustical signal is less than presetting signal to noise ratio, then gain regulation module 140 increases main Mike increasing
Benefit, difference in magnitude adjusting module 130 is preset first and is adjusted to the 5th under difference in magnitude and presets difference in magnitude, to reduce diamylose gram equipment simultaneously
De-noising degree, wherein, the 5th presets difference in magnitude presets difference in magnitude more than the 4th.
In a specific embodiment, above-mentioned second to preset difference in magnitude be 3dB, and the 3rd to preset difference in magnitude be 0dB, i.e. judges
The comparison result of module 120 is: 3dB ＞ the first acoustical signal and the difference in magnitude L >=0dB of second sound signal, the 4th presets width
Value difference is 4dB, and the 5th to preset difference in magnitude be 5dB, and presetting signal to noise ratio A is 80dB, the most in the present embodiment: if judge module 120
The signal to noise ratio that comparison result is the first acoustical signal more than 80dB, then gain regulation module 140 suitably increases main Mike's gain,
Difference in magnitude adjusting module 130 is preset first and is adjusted to the 4th under difference in magnitude 6dB and presets difference in magnitude 4dB simultaneously；If judge module 120
The signal to noise ratio that comparison result is the first acoustical signal less than 80dB, then gain regulation module 140 suitably increases main Mike's gain,
Difference in magnitude adjusting module 130 is preset first and is adjusted to the 5th under difference in magnitude 6dB and presets difference in magnitude 5dB simultaneously.
In one embodiment, above-mentioned judge module 120 is additionally operable to judge whether to include in main Mike background noise, tool
Body, if the comparison result of difference in magnitude is that the difference in magnitude of the first acoustical signal and second sound signal is less than the in judge module 120
Two preset difference in magnitude, preset difference in magnitude more than or equal to the 3rd, then detection module detects the first sound that main Mike gathers further
Whether signal includes first user voice signal；If detecting, the first acoustical signal includes first user voice signal, with
The signal to noise ratio of the first acoustical signal is compared by i.e. judge module 120 with default signal to noise ratio.If the result of signal to noise ratio comparison
It is that the signal to noise ratio of the first acoustical signal is more than presetting signal to noise ratio, it is judged that module 120 determines whether whether include this in main Mike
Back noise, if judging, main Mike is working properly, then gain regulation module 140 increases main Mike's gain, and difference in magnitude adjusts simultaneously
Module 130 is preset first and is adjusted to the 4th under difference in magnitude and presets difference in magnitude, to reduce the de-noising degree of diamylose gram equipment.If first
The signal to noise ratio of acoustical signal is less than presetting signal to noise ratio, and same judge module 120 determines whether whether include background in main Mike
Noise, if judging, main Mike is working properly, then gain regulation module 140 increases main Mike's gain, and difference in magnitude adjusts mould simultaneously
Block 130 is preset first and is adjusted to the 5th under difference in magnitude and presets difference in magnitude, to reduce the de-noising degree of diamylose gram equipment, wherein, and
Five preset difference in magnitude presets difference in magnitude more than the 4th.
In a specific embodiment, above-mentioned second to preset difference in magnitude be 3dB, and the 3rd to preset difference in magnitude be 0dB, i.e. judges
The comparison result of module 120 is: 3dB ＞ the first acoustical signal and the difference in magnitude L >=0dB of second sound signal, the 4th presets width
Value difference is 4dB, and the 5th to preset difference in magnitude be 5dB, and presetting signal to noise ratio A is 80dB, the most in the present embodiment: if judge module 120
The signal to noise ratio that comparison result is the first acoustical signal more than 80dB, then determine whether whether main Mike has background noise, if
Main Mike normally works, then gain regulation module 140 suitably increases main Mike's gain, and difference in magnitude adjusting module 130 is by simultaneously
One presets and is adjusted to the 4th under difference in magnitude 6dB and presets difference in magnitude 4dB；If the comparison result of judge module 120 is the first acoustical signal
Signal to noise ratio less than 80dB, then determine whether whether main Mike has background noise, if main Mike normally works, then Gain tuning
Module 140 suitably increases main Mike's gain, and difference in magnitude adjusting module 130 is preset first and is adjusted to the 5th under difference in magnitude 6dB simultaneously
Preset difference in magnitude 5dB.
It is illustrated in figure 4 the diamylose gram denoising device 100 another embodiment schematic diagram that the present invention provides, can from figure
To find out, diamylose gram denoising device 100 also includes Mike's handover module 150, for whether including background according in main Mike
Main Mike and secondary Mike are switched over by noise, and according to the difference in magnitude of the first acoustical signal and second sound signal and default width
Main Mike and secondary Mike are switched over by the comparison result of value difference.
Specifically, if the comparison result of difference in magnitude is the width of the first acoustical signal and second sound signal in judge module 120
Value difference is preset difference in magnitude less than second, is preset difference in magnitude more than or equal to the 3rd, then detection module detects main Mike collection further
The first acoustical signal in whether include first user voice signal；If detecting, the first acoustical signal includes first user language
Tone signal, the signal to noise ratio of the first acoustical signal is compared by judge module 120 with default signal to noise ratio immediately.If signal to noise ratio ratio
To the signal to noise ratio that result is the first acoustical signal more than preset signal to noise ratio, it is judged that module 120 determine whether main Mike is
No including background noise, if judging, main Mike includes this Earth noise, then Mike's handover module 150 directly switches to secondary Mike
Sounding.
If further, the width that the comparison result of the difference in magnitude of judge module 120 is the first acoustical signal and second sound signal
Value difference presets difference in magnitude less than the 3rd, then main Mike and secondary Mike position are switched over by Mike's handover module 150, illustrate now
The second user voice signal that main Mike collects is relatively strong, and the first user voice signal that secondary Mike collects is more weak, follow-up
The signal to noise ratio of second sound signal is compared by judge module 120 with default signal to noise ratio.Concrete follow-up judgement step is with aforementioned
The comparison process of the first acoustical signal is identical, does not repeats at this.
In a specific embodiment, the above-mentioned 3rd to preset difference in magnitude be 0dB, i.e. the comparison result of judge module 120 is:
The difference in magnitude L ＜ 0dB of the first acoustical signal and second sound signal, now explanation second sound signal is than the first acoustical signal
By force, then Mike's handover module 150 directly closes main Mike, uses secondary Mike to carry out voice collecting.
Present invention also offers a kind of mobile terminal, mobile terminal at least includes main Mike and secondary Mike, wherein, main wheat
Gram being located at the bottom of fuselage, secondary Mike is located at top or the back side of fuselage, also includes that above-mentioned diamylose gram noise reduction fills in mobile terminal
Put 100.The difference in magnitude of the second sound signal that its first acoustical signal main Mike collected and secondary Mike collect is with pre-
If difference in magnitude is compared, and the first acoustical signal is compared with default signal to noise ratio, and according to comparison result to default width
Value difference is adjusted, and is adjusted corresponding noise reduction algorithm, evade with this change because user grips the position of mobile phone, single
The ascending voice signal that the factors such as body Mike's difference, the seal difference of audio cavity structure and other path attenuation difference cause occurs
The phenomenon of the failure of distortion, improves audio identification efficiency.
It should be noted that, above-described embodiment all can independent assortment as required.The above is only the preferred of the present invention
Embodiment, it is noted that for those skilled in the art, in the premise without departing from the principle of the invention
Under, it is also possible to making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (7)
1. a diamylose gram noise-reduction method, it is characterised in that be applied to diamylose gram equipment, at least include in described diamylose gram equipment
Main Mike and secondary Mike, described diamylose gram noise-reduction method includes:
S10 gathers the first acoustical signal by main Mike, secondary Mike gathers second sound signal；
The difference in magnitude of the first acoustical signal and second sound signal is compared by S20 with default difference in magnitude；
The signal to noise ratio of the first acoustical signal, based on the comparison result in step S20, is compared by S30 with default signal to noise ratio；
Default difference in magnitude, based on the comparison result in step S30, is adjusted by S40, to reduce the de-noising journey of diamylose gram equipment
Degree.
2. diamylose gram noise-reduction method as claimed in claim 1, it is characterised in that
Described first acoustical signal includes first user voice signal and/or ambient noise signal；
Described second sound signal includes the second user voice signal and/or ambient noise signal；
Described default difference in magnitude includes first presetting difference in magnitude, second presetting difference in magnitude and the 3rd and preset difference in magnitude, and first
Presetting difference in magnitude and preset difference in magnitude more than second, second presets difference in magnitude presets difference in magnitude more than the 3rd.
3. diamylose gram noise-reduction method as claimed in claim 2, it is characterised in that
If the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal presets amplitude less than first
Differ from, preset difference in magnitude more than or equal to second, specifically include the most in step s 30: detect the first acoustical signal that main Mike gathers
In whether include first user voice signal；If including, the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
If the signal to noise ratio of the first acoustical signal is more than presetting signal to noise ratio, specifically include the most in step s 40: preset first under difference in magnitude
It is adjusted to the 4th and presets difference in magnitude, to reduce the de-noising degree of diamylose gram equipment；
If the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal presets amplitude less than first
Differ from, preset difference in magnitude more than or equal to second, specifically include the most in step s 30: detect the first acoustical signal that main Mike gathers
In whether include first user voice signal；If including, the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
If the signal to noise ratio of the first acoustical signal is less than presetting signal to noise ratio, specifically include the most in step s 40: preset first under difference in magnitude
Being adjusted to the 5th and preset difference in magnitude, to reduce the de-noising degree of diamylose gram equipment, wherein, the described 5th presets difference in magnitude more than the 4th
Preset difference in magnitude；
If the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal presets amplitude less than second
Differ from, preset difference in magnitude more than or equal to the 3rd, specifically include the most in step s 30: detect the first acoustical signal that main Mike gathers
In whether include first user voice signal；If including, the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
If the signal to noise ratio of the first acoustical signal is more than presetting signal to noise ratio, specifically include the most in step s 40: increase main Mike's gain, with
Time preset first and to be adjusted to the 4th under difference in magnitude and preset difference in magnitude, to reduce the de-noising degree of diamylose gram equipment；
If the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal presets amplitude less than second
Differ from, preset difference in magnitude more than or equal to the 3rd, specifically include the most in step s 30: detect the first acoustical signal that main Mike gathers
In whether include first user voice signal；If including, the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
If the signal to noise ratio of the first acoustical signal is more than presetting signal to noise ratio, determine whether whether main Mike has background noise；If main Mike
Normal work, specifically includes: increase main Mike's gain, preset first simultaneously and be adjusted to the 4th under difference in magnitude the most in step s 40
Preset difference in magnitude, to reduce the de-noising degree of diamylose gram equipment；If main Mike has background noise, it is adjusted to secondary Mike sounding；
If the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal presets amplitude less than second
Differ from, preset difference in magnitude more than or equal to the 3rd, specifically include the most in step s 30: detect the first acoustical signal that main Mike gathers
In whether include first user voice signal；If including, the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
If the signal to noise ratio of the first acoustical signal is less than presetting signal to noise ratio, specifically include the most in step s 40: increase main Mike's gain, with
Time preset first and to be adjusted to the 5th under difference in magnitude and preset difference in magnitude, to reduce the de-noising degree of diamylose gram equipment, wherein, described
Five preset difference in magnitude presets difference in magnitude more than the 4th；
If the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal presets amplitude less than second
Differ from, preset difference in magnitude more than or equal to the 3rd, specifically include the most in step s 30: detect the first acoustical signal that main Mike gathers
In whether include first user voice signal；If including, the signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
If the signal to noise ratio of the first acoustical signal is less than presetting signal to noise ratio, determine whether whether main Mike has background noise；If main Mike
Normal work, specifically includes: increase main Mike's gain, preset first simultaneously and be adjusted to the 5th under difference in magnitude the most in step s 40
Presetting difference in magnitude, to reduce the de-noising degree of diamylose gram equipment, wherein, the described 5th presets difference in magnitude presets amplitude more than the 4th
Difference；If main Mike has background noise, it is adjusted to secondary Mike sounding；
If the difference in magnitude that the comparison result of step S20 is the first acoustical signal and second sound signal presets amplitude less than the 3rd
Difference, then main Mike and secondary Mike position are switched over, include the most in step s 30: by the signal to noise ratio of second sound signal with
Default signal to noise ratio is compared.
4. a diamylose gram denoising device, it is characterised in that be applied to diamylose gram equipment, at least include in described diamylose gram equipment
Main Mike and secondary Mike, described diamylose gram denoising device includes:
Sound acquisition module, for gathering the first acoustical signal by main Mike, secondary Mike gathers second sound signal；
Judge module, for the difference in magnitude of the first acoustical signal and second sound signal is compared with default difference in magnitude, and
The signal to noise ratio of the first acoustical signal is compared with default signal to noise ratio；
Difference in magnitude adjusting module, for the comparison result of the signal to noise ratio according to the first acoustical signal with default noise, to default width
Value difference is adjusted.
5. diamylose gram denoising device as claimed in claim 4, it is characterised in that
Described judge module is additionally operable to judge whether include background noise in main Mike；And/or,
Described diamylose gram denoising device also includes gain regulation module, for the signal to noise ratio according to the first acoustical signal with default
The comparison result of noise, adjusts the gain of main Mike.
6. diamylose gram denoising device as claimed in claim 5, it is characterised in that also include wheat in described diamylose gram denoising device
Gram handover module, for according to whether including in main Mike that main Mike and secondary Mike are switched over by background noise, and according to the
Main Mike and secondary Mike are cut by the difference in magnitude of one acoustical signal and second sound signal with the comparison result of default difference in magnitude
Change.
7. a mobile terminal, it is characterised in that at least include main Mike and secondary Mike, wherein, main wheat in described mobile terminal
Gram being located at the bottom of fuselage, secondary Mike is located at top or the back side of fuselage, described mobile terminal also includes such as claim 4～
Diamylose gram denoising device described in 6 any one.
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