CN108520754A - A kind of noise reduction meeting machine - Google Patents
A kind of noise reduction meeting machine Download PDFInfo
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- CN108520754A CN108520754A CN201810311054.8A CN201810311054A CN108520754A CN 108520754 A CN108520754 A CN 108520754A CN 201810311054 A CN201810311054 A CN 201810311054A CN 108520754 A CN108520754 A CN 108520754A
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Classifications
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/568—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants
-
- 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 discloses a kind of noise reduction meeting machine, including：Pickup module is converted into the first audio signal for being acquired to sound source and ambient sound；WiFi module, for the second audio signal and send final audio signal that other meeting machines send over to be interconnected, received with other meeting machines；Orientation button specifies sound bearing manually for user；CPU processing modules carry out the processing of Sounnd source direction speech enhan-cement according to the sound bearing that the sound bearing or user that calculate are specified manually to the first audio signal；Ambient sound is carried out to Sounnd source direction speech enhan-cement treated the first audio signal and filters out processing；Ambient sound is carried out to the second audio signal and filters out processing；And horn module, it plays through ambient sound second audio signal that filters out that treated；The final audio signal is the first audio signal after the processing of Sounnd source direction speech enhan-cement and ambient sound filter out processing.The call clear sound of the present invention, avoids phenomenon of uttering long and high-pitched sounds, using effect good.
Description
Technical field
The present invention relates to meeting machine technical field, more particularly to a kind of noise reduction meeting machine.
Background technology
Videoconference is the more extensive communication service of current application, it can efficiently solve more people strange lands and carry out voice
The problem of exchange, therefore welcome deeply by enterprises and individuals user.For example, the business people in enterprise is often in the trip to go on business
It is frequently necessary to actively more people with other strange lands on the way and carries out videoconference to carry out speech exchange.Therefore, they need one kind
The mode of videoconference can be held whenever and wherever possible.
Meeting machine used at present is very easy to phenomenon of uttering long and high-pitched sounds occur in communication process, and meeting machine receives other meetings
The audio signal of view machine is all much unintelligible, and it is poor to use effect.
Invention content
The technical problem to be solved by the present invention is to, for the above-mentioned prior art in deficiency, a kind of noise reduction meeting machine is provided,
It can effectively avoid phenomenon of uttering long and high-pitched sounds, and can make call clear sound, and using effect is good.
In order to solve the above technical problems, the technical scheme is that：
A kind of noise reduction meeting machine, including：
Pickup module, including multiple microphones arranged with array way, are converted for being acquired to sound source and ambient sound
At the first audio signal；
WiFi module, second sended over for interconnecting, receiving other meeting machines by wide area network with other meeting machines
Audio signal and the final audio signal of transmission；
Orientation button specifies sound bearing manually for user；
CPU processing modules calculate sound bearing according to the first audio signal；According to the sound bearing or user hand calculated
Specified sound bearing is moved, the processing of Sounnd source direction speech enhan-cement is carried out to the first audio signal；Sounnd source direction voice is increased
The first audio signal that treated by force carries out ambient sound and filters out processing；Ambient sound is carried out to the second audio signal and filters out processing；
And horn module, it plays through ambient sound second audio signal that filters out that treated；
The pickup module, WiFi module, orientation button and horn module are electrically connected with CPU processing modules, described final
Audio signal is to be handled through Sounnd source direction speech enhan-cement and ambient sound first audio signal that filters out that treated.
As a preferred embodiment, the sound source is user's one's voice in speech.
As a preferred embodiment, first audio signal include it is multiple by multiple microphones respectively to same sound source into
The capable audio electrical signal for acquiring and being converted to.
As a preferred embodiment, the method that the CPU processing modules obtain sound bearing according to the first audio signal, packet
Include following steps：
1）It arbitrarily chooses one of microphone to be used as with reference to microphone, reference microphone is acquired sound source and is converted to
Reference audio electric signal；
2）Same sound source is acquired with other microphones and other audio electrical signals for being converted to respectively with step 1）
To reference audio electric signal compare, obtain the difference in magnitude and phase between other audio electrical signals and reference audio electric signal
Difference；
3）According to by step 2）Obtained difference in magnitude and phasometer calculate the sound transmission of same sound source to reference microphone and
The time difference of other microphones；
4）According to by step 3）Between the time difference obtained and reference microphone corresponding with the time difference and other microphones
Distance calculates sound bearing.
As a preferred embodiment, first audio signal of CPU processing modules pair carries out Sounnd source direction speech enhan-cement
The method of processing, includes the following steps：
1）CPU processing modules are chosen according to the sound bearing that the sound bearing or user calculated are specified manually closest to sound source
Microphone as target microphone, target microphone is acquired sound source and is converted to target audio electric signal；
2）CPU processing modules other microphones are acquired same sound source and other audio electrical signals for being converted to and by
Step 1）Obtained target audio electric signal is converted into other frequency spectrums and target spectrum, and other frequencies and target spectrum is made to oppose
Than；
3）CPU processing modules amplify the amplitude corresponding prior to the frequency of other frequency spectrums of phase in target spectrum, while CPU processing
The corresponding amplitude of frequency that phase in target spectrum is lagged behind other frequency spectrums by module reduces.
As a preferred embodiment, the ambient sound includes that horn module is played through ambient sound second sound that filters out that treated
The sound of frequency signal, first audio signal further include pickup module ambient sound is acquired and the third audio that is converted into
Signal.
As a preferred embodiment, the CPU processing modules are to through Sounnd source direction speech enhan-cement treated the first sound
Frequency carries out the method that ambient sound filters out processing, includes the following steps：
1）CPU processing modules will be carried out through Sounnd source direction speech enhan-cement treated the first audio signal and the second audio signal
Comparison；
2）CPU processing modules will through in Sounnd source direction speech enhan-cement treated the first audio signal with the second audio signal phase
As third audio signal filter out, obtain final audio signal.
As a preferred embodiment, second audio signal of CPU processing modules pair carries out the side that ambient sound filters out processing
Method includes the following steps：
1）Second audio signal is converted into the first frequency spectrum by CPU processing modules；
2）CPU processing modules are filtered out by step 1）In letter other than obtained the first frequency spectrum Mid Frequency ranging from 200-3000Hz
Number.
As a preferred embodiment, the noise reduction meeting machine further includes temporald eixis lamp, at the temporald eixis lamp and CPU
Manage module connection.
As a preferred embodiment, the noise reduction meeting machine further includes the input mould for inputting other meeting machine IP address
Block, the sending module for sending other meeting machine IP address to noise reduction meeting machine and for the storage mould of stored session side's information
Block, the input module, sending module and storage module set form application and are installed on intelligent terminal.
The beneficial effects of the invention are as follows：Pass through CPU processing modules, pickup module, WiFi module, orientation button and welding bell
Block makes sound bearing pair the first audio letter that this noise reduction meeting function is specified manually according to the sound bearing or user calculated
It number carries out the processing of Sounnd source direction speech enhan-cement, environment is carried out to Sounnd source direction speech enhan-cement treated the first audio signal
Sound, which filters out processing and carries out ambient sound to the second audio signal, filters out processing, so as to effectively avoid phenomenon of uttering long and high-pitched sounds, and energy
Keep call clear sound, using effect good.
Description of the drawings
Fig. 1 is the structural schematic diagram of embodiments of the present invention and intelligent terminal；
Fig. 2 is that the CPU processing modules of the present invention obtain the method flow frame diagram of sound bearing according to the first audio signal；
Fig. 3 is that first audio signal of CPU processing modules pair of the present invention carries out the side of Sounnd source direction speech enhan-cement processing
Method flow frame diagram；
Fig. 4 is the CPU processing modules of the present invention to through Sounnd source direction speech enhan-cement treated the first audio progress ring
Border sound filters out the method flow frame diagram of processing；
Fig. 5 is that second audio signal of CPU processing modules pair of the present invention carries out the method flow frame that ambient sound filters out processing
Frame figure.
In figure：1- pickup modules, 2-WiFi modules, the orientation 3- button, 4-CPU processing modules, 5- horn modules, the orientation 6-
Indicator light, 7- input modules, 8- sending modules, 9- memory modules, 10- intelligent terminals.
Specific implementation mode
Xia Mianjiehefutuduibenfamingjiegouyuanlihegongzuoyuanlizuojinyibuxiangxishuoming.
As shown in Figure 1, a kind of noise reduction meeting machine, including：
Pickup module 1, including multiple microphones arranged with array way, are converted for being acquired to sound source and ambient sound
At the first audio signal；
WiFi module 2, second sended over for interconnecting, receiving other meeting machines by wide area network with other meeting machines
Audio signal and the final audio signal of transmission；
Orientation button 3 specifies sound bearing manually for user；
CPU processing modules 4 calculate sound bearing according to the first audio signal；According to the sound bearing or user calculated
Specified sound bearing manually carries out the processing of Sounnd source direction speech enhan-cement to the first audio signal；To Sounnd source direction voice
Enhancing treated the first audio signal carries out ambient sound and filters out processing；Ambient sound is carried out to the second audio signal and filters out processing；
And horn module 5, it plays through ambient sound second audio signal that filters out that treated；
The pickup module 1, WiFi module 2, orientation button 3 and horn module 5 are connect with CPU processing modules 4, described final
Audio signal is to be handled through Sounnd source direction speech enhan-cement and ambient sound first audio signal that filters out that treated.
As a preferred embodiment, the noise reduction meeting machine further includes temporald eixis lamp 6, the temporald eixis lamp 6 and CPU
Processing module 4 connects, and such user will be lighted by temporald eixis lamp 6 while orientation button 3, inform user to which orientation
It is the most clear to speak, user-friendly.
As a preferred embodiment, the noise reduction meeting machine further includes the input mould for inputting other meeting machine IP address
Block 7, the sending module 8 for sending other meeting machine IP address to noise reduction meeting machine and for the storage of stored session side's information
Module 9, the input module 7, sending module 8 and the set of storage module 9 form application and are installed on intelligent terminal 10, the intelligence
Energy terminal 10 passes through WiFi wide area networks with noise reduction meeting machine and connect.The intelligent terminal 10 is mobile phone, tablet or computer.
The method of the noise reduction meeting prow time access WiFi wide area networks, includes the following steps：
Open the WiFi module 2 of noise reduction meeting machine, then intelligent terminal 10 input the account that is connect with WiFi Wide Area Networks and
Password, then intelligent terminal 10 account and password are sent to the CPU processing modules 4 of noise reduction meeting machine with WiFi broadcast modes,
CPU processing modules 4 control WiFi module 2 after receiving account and password and connect WiFi wide area networks, and by account and password storage
It is next to connect automatically when being connect with identical WiFi wide area networks in CPU processing modules 4.
The method that the noise reduction meeting machine opens videoconference with other meeting machines, includes the following steps：
1）The intelligent terminal 10 passes through WiFi wide area networks with noise reduction meeting machine and connect；
2）The input module 7 for passing through application inputs the IP address of other meeting machines, is then sent IP address by sending module 8
It gives noise reduction meeting machine, noise reduction meeting machine to be connect with other meeting machines after receiving IP address, opens videoconference.
The sending module 8 of application, can will be using upper storage module 9 while sending IP address to noise reduction meeting machine
IP address stores, and inputs other information for user, user-friendly so that user recognizes and is grouped.
As a preferred embodiment, the sound source is user's one's voice in speech.
As a preferred embodiment, first audio signal include it is multiple by multiple microphones respectively to same sound source into
The capable audio electrical signal for acquiring and being converted to.
As shown in Fig. 2, the method that the CPU processing modules 4 obtain sound bearing according to the first audio signal, including it is following
Step：
1）It arbitrarily chooses one of microphone to be used as with reference to microphone, reference microphone is acquired sound source and is converted to
Reference audio electric signal；
2）Same sound source is acquired with other microphones and other audio electrical signals for being converted to respectively with step 1）
To reference audio electric signal compare, obtain the difference in magnitude and phase between other audio electrical signals and reference audio electric signal
Difference；
3）According to by step 2）Obtained difference in magnitude and phasometer calculate the sound transmission of same sound source to reference microphone and
The time difference of other microphones；
4）According to by step 3）Between the time difference obtained and reference microphone corresponding with the time difference and other microphones
Distance calculates sound bearing.
Since multiple microphones in pickup module are to be arranged with array way, and the distance between multiple microphones are
It is known, using reference microphone as origin, then the coordinate of other microphones is also known, according to formula：
Wherein,（X, y）Sound source coordinate is represented,（xi, yi）The coordinate value of reference microphone is represented,（xj, yj）It represents in pickup module
The coordinate of one other microphone；C represents the aerial spread speed of sound wave；AndAcoustic Wave Propagation is represented to reference microphone
Time difference between other microphones；The coordinate of sound source can so be found out, you can know sound source and each microphone
Location information and they the distance between information.
It should be noted that among the above in addition to reference can also be chosen using reference microphone as origin
Origin of the geometric center position of microphone and other microphones as reference coordinate.
As shown in figure 3, the CPU processing modules 4 carry out the processing of Sounnd source direction speech enhan-cement to the first audio signal
Method includes the following steps：
1）CPU processing modules 4 are chosen according to the sound bearing that the sound bearing or user calculated are specified manually closest to sound
The microphone in source is acquired sound source and is converted to target audio electric signal as target microphone, target microphone；
2）CPU processing modules 4 other microphones are acquired same sound source and other audio electrical signals for being converted to and
By step 1）Obtained target audio electric signal is converted into other frequency spectrums and target spectrum, and other frequencies and target spectrum is made to make
Comparison；
3）CPU processing modules 4 amplify the amplitude corresponding prior to the frequency of other frequency spectrums of phase in target spectrum, while at CPU
The corresponding amplitude of frequency that phase in target spectrum is lagged behind other frequency spectrums by reason module 4 reduces.
As a preferred embodiment, the ambient sound includes that horn module 5 plays and filters out that treated second through ambient sound
The sound of audio signal and other sound around sound source, the first audio signal is by above-mentioned Sounnd source direction speech enhan-cement
Other acoustic processings around the sound source in ambient sound are fallen after reason, leaves behind horn module 5 in ambient sound and plays through environment
The sound for the second audio signal that sound filters out that treated, first audio signal further include that pickup module 1 carries out ambient sound
The third audio signal for acquiring and being converted into.
Since when call, possible other side and one's own side are speaking, then horn module 5 is filtered in broadcasting through ambient sound
When except treated the second audio, pickup module 1 can also collect horn module 5 and send out while acquiring the voice of one's own side
Sound, i.e., the first audio signal at this time includes third audio signal, if will not pass through that ambient sound filters out processing the
One audio signal is directly sent out, and is equivalent to and is transmitted the voice of other side back and forth, is so easy to be formed and be uttered long and high-pitched sounds, leads to language in call
Sound is unintelligible, so CPU processing modules 4 need to filter out third audio signal parts in the first audio signal, audio final in this way
The sound that horn module 5 is sent out just is not included in signal（That is ambient sound）, only it is left user's one's voice in speech（That is sound source）, in this way
Can be to avoid phenomenon of uttering long and high-pitched sounds, conversing can also become apparent, and give one better usage experience of user.
As shown in figure 4, the CPU processing modules 4 through Sounnd source direction speech enhan-cement treated the first audio to carrying out
The method that ambient sound filters out processing, includes the following steps：
1）CPU processing modules 4 will through Sounnd source direction speech enhan-cement treated the first audio signal and the second audio signal into
Row comparison；
2）CPU processing modules 4 will through in Sounnd source direction speech enhan-cement treated the first audio signal with the second audio signal
Similar third audio signal filters out, and obtains final audio signal.
As shown in figure 5, the CPU processing modules 4 carry out the second audio signal the method that ambient sound filters out processing, including
Following steps：
1）Second audio signal is converted into the first frequency spectrum by CPU processing modules 4；
2）CPU processing modules 4 are filtered out by step 1）In letter other than obtained the first frequency spectrum Mid Frequency ranging from 200-3000Hz
Number.
Between 200-3000Hz being concentrated mainly on due to people's one's voice in speech frequency, audibility range normal person's energy of human ear
Reach 30-18000Hz, and the meeting machine that other side uses is not necessarily band decrease of noise functions, thus other side be transmitted through the sound that comes in addition to
People's one's voice in speech may include other ambient sounds, and the aphthenxia that so other side can be caused to send is clear, therefore CPU
Processing module 4 comes out the frequency extraction of 200-3000Hz, and the frequency range other than 200-3000Hz is filtered out, and can effectively filter out ring
Border sound ensures the lamprophonia that other side sends.
The above is only better embodiment of the present invention, and every technical solution according to the present invention is to above implementation
Any subtle modifications, equivalent variations and modifications, belong in the range of technical solution of the present invention made by mode.
Claims (10)
1. a kind of noise reduction meeting machine, it is characterised in that：Including：
Pickup module, including multiple microphones arranged with array way, are converted for being acquired to sound source and ambient sound
At the first audio signal；
WiFi module, second sended over for interconnecting, receiving other meeting machines by wide area network with other meeting machines
Audio signal and the final audio signal of transmission；
Orientation button specifies sound bearing manually for user；
CPU processing modules calculate sound bearing according to the first audio signal；According to the sound bearing or user hand calculated
Specified sound bearing is moved, the processing of Sounnd source direction speech enhan-cement is carried out to the first audio signal；Sounnd source direction voice is increased
The first audio signal that treated by force carries out ambient sound and filters out processing；Ambient sound is carried out to the second audio signal and filters out processing；
And horn module, it plays through ambient sound second audio signal that filters out that treated；
The pickup module, WiFi module, orientation button and horn module are electrically connected with CPU processing modules, described final
Audio signal is to be handled through Sounnd source direction speech enhan-cement and ambient sound first audio signal that filters out that treated.
2. a kind of noise reduction meeting machine according to claim 1, it is characterised in that：The sound source is user's one's voice in speech.
3. a kind of noise reduction meeting machine according to claim 2, it is characterised in that：First audio signal include it is multiple by
Multiple microphones are acquired respectively to same sound source and the audio electrical signal that is converted to.
4. a kind of noise reduction meeting machine according to claim 3, it is characterised in that：The CPU processing modules are according to the first sound
The method of frequency signal acquisition sound bearing, includes the following steps：
1）It arbitrarily chooses one of microphone to be used as with reference to microphone, reference microphone is acquired sound source and is converted to
Reference audio electric signal；
2）Same sound source is acquired with other microphones and other audio electrical signals for being converted to respectively with step 1）
To reference audio electric signal compare, obtain the difference in magnitude and phase between other audio electrical signals and reference audio electric signal
Difference；
3）According to by step 2）Obtained difference in magnitude and phasometer calculate the sound transmission of same sound source to reference microphone and
The time difference of other microphones；
4）According to by step 3）Between the time difference obtained and reference microphone corresponding with the time difference and other microphones
Distance calculates sound bearing.
5. a kind of noise reduction meeting machine according to claim 4, it is characterised in that：First audio of CPU processing modules pair
The method that signal carries out the processing of Sounnd source direction speech enhan-cement, includes the following steps：
1）CPU processing modules are chosen according to the sound bearing that the sound bearing or user calculated are specified manually closest to sound source
Microphone as target microphone, target microphone is acquired sound source and is converted to target audio electric signal；
2）CPU processing modules other microphones are acquired same sound source and other audio electrical signals for being converted to and by
Step 1）Obtained target audio electric signal is converted into other frequency spectrums and target spectrum, and other frequencies and target spectrum is made to oppose
Than；
3）CPU processing modules amplify the amplitude corresponding prior to the frequency of other frequency spectrums of phase in target spectrum, while CPU processing
The corresponding amplitude of frequency that phase in target spectrum is lagged behind other frequency spectrums by module reduces.
6. a kind of noise reduction meeting machine according to claim 3, it is characterised in that：The ambient sound includes that horn module plays
Sound through ambient sound second audio signal that filters out that treated, first audio signal further includes pickup module to ambient sound
The third audio signal for being acquired and being converted into.
7. a kind of noise reduction meeting machine according to claim 6, it is characterised in that：The CPU processing modules are to through sound source side
Tropism speech enhan-cement treated the first audio carries out the method that ambient sound filters out processing, includes the following steps：
1）CPU processing modules will be carried out through Sounnd source direction speech enhan-cement treated the first audio signal and the second audio signal
Comparison；
2）CPU processing modules will through in Sounnd source direction speech enhan-cement treated the first audio signal with the second audio signal phase
As third audio signal filter out, obtain final audio signal.
8. a kind of noise reduction meeting machine according to claim 1, it is characterised in that：Second audio of CPU processing modules pair
Signal carries out the method that ambient sound filters out processing, includes the following steps：
1）Second audio signal is converted into the first frequency spectrum by CPU processing modules；
2）CPU processing modules are filtered out by step 1）In letter other than obtained the first frequency spectrum Mid Frequency ranging from 200-3000Hz
Number.
9. a kind of noise reduction meeting machine according to claim 1, it is characterised in that：Further include temporald eixis lamp, the orientation
Indicator light is connect with CPU processing modules.
10. a kind of noise reduction meeting machine according to claim 1, it is characterised in that：Further include for inputting other meeting machines
The input module of IP address, the sending module for sending other meeting machine IP address to noise reduction meeting machine and be used for stored session
The storage module of square information, the input module, sending module and storage module set form application and are installed on intelligent terminal.
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| CN106878533A (en) * | 2015-12-10 | 2017-06-20 | 北京奇虎科技有限公司 | The communication means and device of a kind of mobile terminal |
| CN110708330A (en) * | 2019-10-16 | 2020-01-17 | 北京字节跳动网络技术有限公司 | Howling prevention method, device, equipment and storage medium |
| CN110972032A (en) * | 2018-09-28 | 2020-04-07 | 塞舌尔商元鼎音讯股份有限公司 | Method for eliminating sound and electronic device for executing method |
| CN114339331A (en) * | 2020-09-27 | 2022-04-12 | 深圳Tcl新技术有限公司 | Playing method, intelligent terminal and computer readable storage medium |
| CN114979902A (en) * | 2022-05-26 | 2022-08-30 | 珠海市华音电子科技有限公司 | Noise reduction and pickup method based on improved variable-step DDCS adaptive algorithm |
| CN117746880A (en) * | 2024-02-20 | 2024-03-22 | 江苏鑫埭信息科技有限公司 | Intelligent noise reduction method and system for teleconference communication |
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