CN106935246A - A kind of voice acquisition methods and electronic equipment based on microphone array - Google Patents
A kind of voice acquisition methods and electronic equipment based on microphone array Download PDFInfo
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- CN106935246A CN106935246A CN201511033228.1A CN201511033228A CN106935246A CN 106935246 A CN106935246 A CN 106935246A CN 201511033228 A CN201511033228 A CN 201511033228A CN 106935246 A CN106935246 A CN 106935246A
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- voice
- microphone
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- voice signal
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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
-
- 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
- G10L21/0232—Processing in the frequency domain
-
- 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
- G10L2021/02166—Microphone arrays; Beamforming
Abstract
The present invention relates to technical field of electronic communication, and in particular to a kind of voice acquisition methods and electronic equipment based on microphone array, comprise the following steps：Omnidirectional array microphone continuous collecting contains the voice signal of voice；Determine voice direction, and the voice signal for collecting is filtered with the first filter unit, to gather the voice signal in correspondence voice direction；Second filter unit is filtered to the voice signal for collecting, and recognizable human voice signal is obtained to filter.Voice acquisition methods and electronic equipment based on microphone array that the present invention is provided, the corresponding voice direction of instruction is received by omnidirectional array microphone, and by filtering the sound that the noise outside voice and filtering equipment send in itself, the voice solved under complex scene is obtained, including remote, background is noisy, people's acoustic jamming, sound obtain problem of low quality, increased man-machine interactive, greatly improve the interaction and interactive experience of user and machine.
Description
Technical field
The present invention relates to technical field of electronic communication, and in particular to a kind of voice based on microphone array is obtained
Take method and electronic equipment.
Background technology
Microphone is received in the field of voice signal such as speech recognition, Voice command, phonetic synthesis
Voice signal by ambient noise and interference influenceed very big, had a strong impact on the treatment matter of voice signal
Amount, the general speech-enhancement system based on single microphone is difficult to obtain preferable enhancing effect.In reality
Under complicated acoustic enviroment, the voice signal of microphone pickup is inevitably subject to RMR room reverb, makes an uproar
It is noisy speech that sound and the interference of other speakers, i.e. microphone receive signal, so not only influences language
Sound quality, can also be such that the performance of many speech processing systems drastically deteriorates.The requirement of existing voice identifying system
The ambient noise of environment is small, speaker is near with a distance from microphone and can not be simultaneously emitted by sound in equipment
Voice is obtained while sound, the orientation of speaker can not be determined according to the voice for picking up in addition.Therefore,
Need to carry out effective noise suppression to the voice signal of microphone pickup, reduce disturbing factor and voice is believed
Number influence, to strengthen quality of speech signal, effectively improve speech processing system performance.
The content of the invention
It is an object of the invention to overcome drawbacks described above of the prior art, the voice under complex scene is solved
Obtain, including remote, background is noisy, people's acoustic jamming, sound obtain problem of low quality, there is provided
A kind of voice acquisition methods based on microphone array, solve above technical problem；
A kind of voice acquisition methods based on microphone array, comprise the following steps：
Step A, omnidirectional array microphone continuous collecting contains the voice signal of voice；
Step B, determines voice direction, and the voice signal for collecting is filtered with the first filter unit
Ripple, to gather the voice signal in correspondence voice direction；
Step C, the second filter unit is filtered to the voice signal for collecting, and be can recognize that with filtering
Human voice signal.
The above-mentioned voice acquisition methods based on microphone array, the omnidirectional array microphone includes：
Annular base plate；
A plurality of microphone devices, are circumferentially distributed in the annular base plate.
The above-mentioned voice acquisition methods based on microphone array, also including omnidirectional's phonation unit, the step
In rapid C, second filtration module is filtered in the voice signal, what omnidirectional's phonation unit sent
Sound.
The above-mentioned voice acquisition methods based on microphone array, the omnidirectional array microphone is arranged at institute
State omnidirectional's phonation unit top.
The above-mentioned voice acquisition methods based on microphone array, the step B includes：
Step B1, determines the voice direction in the voice signal；
Step B2, compensates to the voice in the voice signal；
Step B3, controls the omnidirectional array microphone to receive the voice signal in the correspondence voice direction.
The above-mentioned voice acquisition methods based on microphone array, in the step B1, determine the people
The method in sound direction is by recognizing that the keyword in voice determines the direction of voice；And/or
In the step B2, the method for voice compensation is frequency domain compensation.
The above-mentioned voice acquisition methods based on microphone array, in the step B3, control described complete
The method that the voice signal in the correspondence voice direction is received to array microphone is Spatially adaptive filtering.
The above-mentioned voice acquisition methods based on microphone array, the step C includes：
Step C1, with the first filtering method to being filtered through filtered voice signal in the step B
Ripple is filtering the voice signal outside voice；
Step C2, with the second filtering method to being carried out through the filtered voice signals of the step C1
Filtering, with the voice sent in omnidirectional's phonation unit described in filtering sound signal.
The above-mentioned voice acquisition methods based on microphone array, first filtering method is segmented for frequency domain
Filtering；And/or
Second filtering method is minimum mean square error criterion adaptive-filtering, the least mean-square error
The reference signal of criterion adaptive-filtering is the voice signal of omnidirectional's phonation unit.
Interaction and interactive experience the present invention also aims to user and machine can be effectively increased
Property, the convenience for using is improve, increased the enjoyment of human-computer interaction, there is provided a kind of table type electronic equipment,
Solve above technical problem.
Technical problem solved by the invention can be realized using following technical scheme：A kind of electronic table
Equipment, including the voice acquisition methods based on microphone array in accordance with the above.
Beneficial effect：Due to using above technical scheme, the people based on microphone array that the present invention is provided
Sound acquisition methods and electronic equipment, the corresponding voice direction of instruction is received by omnidirectional array microphone, and
By filtering the sound that the noise outside voice and filtering equipment send in itself, the voice under complex scene is solved
Obtain, including remote, background is noisy, people's acoustic jamming, sound obtain problem of low quality, increases
Man-machine is interactive, greatly improves the interaction and interactive experience of user and machine.
Brief description of the drawings
Fig. 1 is a kind of workflow of the voice acquisition methods based on microphone array in the embodiment of the present invention
Cheng Tu；
Fig. 2 is the workflow diagram in the direction of the voice in the determination voice signal in the embodiment of the present invention；
Fig. 3 is the workflow diagram of the human voice signal that the filter acquisition in the embodiment of the present invention can recognize that；
Fig. 4 is the overlooking the structure diagram of the omnidirectional array microphone in the embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are without work
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
It should be noted that in the case where not conflicting, the embodiment in the present invention and the spy in embodiment
Levying to be mutually combined.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as of the invention
Limit.
A kind of reference picture 1, Fig. 4, voice acquisition methods based on microphone array, comprises the following steps：
Step A, omnidirectional array microphone continuous collecting contains the voice signal of voice；
Step B, determines voice direction, and the voice signal for collecting is filtered with the first filter unit,
To gather the voice signal in correspondence voice direction；
Step C, the second filter unit is filtered to the voice signal for collecting, and recognizable people is obtained to filter
Acoustical signal.
In above-mentioned technical proposal, by providing omnidirectional array microphone, 360 degree of scopes around collecting device
Interior voice signal, after determining the voice direction in voice signal, by the first filtering unit filters and adopts
The voice signal in collection correspondence voice direction, filters further according to the voice signal that voice direction collects with second
Unit is filtered, so that filtering environmental noise, obtains recognizable human voice signal.Obtain what be can recognize that
The other functions module of equipment can be further supplied to be processed after voice signal, to have realized
Whole Voice command, speech recognition or semantics recognition function.
On the basis of above-mentioned technical proposal, further, a kind of voice based on microphone array of the present invention
In the preferred embodiment of acquisition methods, omnidirectional array microphone includes：
Annular base plate 1；
A plurality of microphone devices 2, are circumferentially distributed in annular base plate 1.
360 degree of scopes around equipment can be realized by the circumferential microphone device 2 being distributed on substrate 1
Interior collected sound signal.As preferred embodiment, can be circumferential uniform in the upper surface of annular base plate 1
, further, can be set to for the central through hole center of circle heart of annular base plate by least 8 microphone devices 2
It is 4.5mm with the distance of microphone device 2.
On the basis of above-mentioned technical proposal, further, a kind of voice based on microphone array of the present invention
In the preferred embodiment of acquisition methods, also including omnidirectional's phonation unit 3, omnidirectional's phonation unit 3 is provided
The function that 360 degree of sound is played；
In step C, the second filtration module is also filtered in the voice signal for collecting, and belongs to omnidirectional's sounding list
The sound that unit 3 sends.
On the basis of above-mentioned technical proposal, further, a kind of voice based on microphone array of the present invention
In the preferred embodiment of acquisition methods, omnidirectional array microphone may be disposed at the top of omnidirectional's phonation unit 3.
Reference picture 2, further, a kind of voice acquisition methods based on microphone array of the present invention compared with
In good embodiment, step B includes：
Step B1, determines the direction of voice in voice signal；
Step B2, the voice stated in voice signal is compensated；
Step B3, control omnidirectional array microphone receives the voice signal in correspondence voice direction.
In above-mentioned technical proposal, the corresponding voice direction of present instruction is can first determine that, and then sound is believed
Voice in number is compensated, and controls omnidirectional array microphone to receive the voice signal in correspondence voice direction afterwards,
So as to the interference of other direction sound can be reduced.
On this basis, in step B1, determine that the method in voice direction can be using the pass in identification voice
Keyword determines the direction of voice, and the current voice direction for sending control instruction is recognized by keyword, can keep away
The interference of other voice arround exempting from；
On this basis, in step B2, the method for voice compensation can use frequency domain compensation.
Further, in step B3, control omnidirectional array microphone receives the correspondence voice direction
The method of voice signal can make omnidirectional array wheat using Spatially adaptive filtering, Spatially adaptive filtering
Gram wind receives the voice signal in voice direction, so as to the noise from other directions can be suppressed.
Reference picture 3, on the basis of above-mentioned technical proposal, further, the present invention is a kind of to be based on microphone
In the preferred embodiment of the voice acquisition methods of array, step C includes：
Step C1, with the first filtering method to through filtered voice signal in step B be filtered with
Filter the voice signal outside voice；
Step C2, with the second filtering method to being filtered through the filtered voice signals of step C1, with
The voice sent in omnidirectional's phonation unit 3 in filtering sound signal.
In above-mentioned technical proposal, filtered by the first filtering method, make only to leave voice in voice signal,
Further, due to the presence of omnidirectional's phonation unit 3, there may be the voice that omnidirectional's phonation unit 3 sends,
Voice in the song such as played, or voice quilt that may be present in other audios played
Omnidirectional array microphone is collected, therefore the voice signal for only staying voice can be entered by the second filtering method
Row filtering, to filter the voice sent from omnidirectional's phonation unit 3.
Used as wired implementation method, the first filtering method can use frequency domain region filtering.
Used as further preferred embodiment, the second filtering method can be using minimum mean square error criterion certainly
Adaptive filtering, wherein, the reference signal of minimum mean square error criterion adaptive-filtering can use omnidirectional's sounding
The voice signal of unit 3.
Reference picture 4, also includes a kind of table type electronic equipment in technical scheme, wherein, including
The voice acquisition methods based on microphone array above.Including pedestal and annular base plate 1, annular base plate 1
Positioned at pedestal top, pedestal is provided with omnidirectional's phonation unit 3, and annular base plate 1 is provided with microphone device 2；
Omnidirectional's phonation unit 3, for detecting voice signal；Microphone device 2, voice is received for analyzing
The direction of signal source of sound and its change.
Used as preferred embodiment, above-mentioned table type electronic equipment can be robot device, intelligent terminal
Equipment, multimedia video equipment etc..
Voice acquisition methods and electronic equipment based on microphone array that the present invention is provided, by omnidirectional's battle array
Row microphone receives the corresponding voice direction of instruction, and by filtering the noise outside voice and filtering equipment sheet
The sound that body sends, the voice acquisition under solution complex scene, including remote, background are noisy, voice
Interference, sound obtain problem of low quality, and the same of effective suppression can be carried out to the noise in broadband
When and ensure voice quality well, improve the signal to noise ratio of Whole frequency band, increased it is man-machine interactive, greatly
The big interaction and interactive experience that improve user and machine.
Preferred embodiments of the present invention are these are only, embodiments of the present invention and protection is not thereby limited
Scope, to those skilled in the art, should can appreciate that all utilization description of the invention and figure
Show the equivalent done by content and the scheme obtained by obvious change, should be included in this
In the protection domain of invention.
Claims (10)
1. a kind of voice acquisition methods based on microphone array, it is characterised in that comprise the following steps：
Step A, omnidirectional array microphone continuous collecting contains the voice signal of voice；
Step B, determines voice direction, and the voice signal for collecting is entered with the first filter unit
Row filtering, to gather the voice signal in correspondence voice direction；
Step C, the second filter unit is filtered to the voice signal for collecting, can to filter acquisition
The human voice signal of identification.
2. a kind of voice acquisition methods based on microphone array according to claim 1, its feature
It is that the omnidirectional array microphone includes：
Annular base plate (1)；
A plurality of microphone devices (2), are circumferentially distributed in the annular base plate (1).
3. a kind of voice acquisition methods based on microphone array according to claim 2, its feature
It is that, also including omnidirectional's phonation unit (3), in the step C, second filtration module filters institute
In stating voice signal, the sound that omnidirectional's phonation unit (3) sends.
4. a kind of voice acquisition methods based on microphone array according to claim 3, its feature
It is that the omnidirectional array microphone is arranged at omnidirectional's phonation unit (3) top.
5. a kind of voice acquisition methods based on microphone array according to claim 1, its feature
It is that the step B includes：
Step B1, determines the voice direction in the voice signal；
Step B2, compensates to the voice in the voice signal；
Step B3, controls the omnidirectional array microphone to receive the voice signal in the correspondence voice direction.
6. a kind of voice acquisition methods based on microphone array according to claim 5, its feature
It is that in the step B1, the method for determining the voice direction is by recognizing the key in voice
Word determines the direction of voice；And/or
In the step B2, the method for voice compensation is frequency domain compensation.
7. a kind of voice acquisition methods based on microphone array according to claim 6, its feature
It is in the step B3, to control the omnidirectional array microphone to receive the correspondence voice direction
The method of voice signal is Spatially adaptive filtering.
8. a kind of voice acquisition methods based on microphone array according to claim 3, its feature
It is that the step C includes：
Step C1, with the first filtering method to being filtered through filtered voice signal in the step B
Ripple is filtering the voice signal outside voice；
Step C2, with the second filtering method to being carried out through the filtered voice signals of the step C1
Filtering, with the voice sent in omnidirectional's phonation unit (3) described in filtering sound signal.
9. a kind of voice acquisition methods based on microphone array according to claim 8, its feature
It is that first filtering method is frequency domain region filtering；And/or
Second filtering method is minimum mean square error criterion adaptive-filtering, the least mean-square error
The reference signal of criterion adaptive-filtering is the voice signal of omnidirectional's phonation unit (3).
10. a kind of table type electronic equipment, it is characterised in that including the base according to claim 1-9
In the voice acquisition methods of microphone array.
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| CN108377605A (en) * | 2018-04-03 | 2018-08-07 | 海盐瑞科光电科技有限公司 | A kind of bathroom voice control intelligent switch |
| CN108694957A (en) * | 2018-04-08 | 2018-10-23 | 湖北工业大学 | The echo cancelltion design method formed based on circular microphone array beams |
| CN113763982A (en) * | 2020-06-05 | 2021-12-07 | 阿里巴巴集团控股有限公司 | Audio processing method and device, electronic equipment and readable storage medium |
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Application publication date: 20170707 |