CN101262252B - Tuning station for eliminating echo and method for eliminating echo based this station - Google Patents
Tuning station for eliminating echo and method for eliminating echo based this station Download PDFInfo
- Publication number
- CN101262252B CN101262252B CN2008100351892A CN200810035189A CN101262252B CN 101262252 B CN101262252 B CN 101262252B CN 2008100351892 A CN2008100351892 A CN 2008100351892A CN 200810035189 A CN200810035189 A CN 200810035189A CN 101262252 B CN101262252 B CN 101262252B
- Authority
- CN
- China
- Prior art keywords
- output
- audio
- sound
- input interface
- digital signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention discloses an audio mixer which can eliminate echo, comprising an input interface unit and an output interface unit. The input interface unit comprises at least one first input interface and at least one second input interface. The first input interface is connected with a microphone and the second input interface is connected with a local terminal audio-output device; the output interface unit comprises at least one first output interface and at least one second output interface. The first output interface is connected to a local audio extraction device and the second output interface is connected to an audio power amplifier; the audio mixer also comprises an echo elimination unit, the input terminal of which is connected with the first input interface and the second input interface while the output terminal thereof is connected with the first output interface. By adding the echo elimination unit to the audio mixer, output sounds from the local terminal audio-output device are cancelled from mixed sound outputted from the microphone while only sounds in the microphone are reserved, thus better realizing requirements of video conferences.
Description
Technical field
The invention belongs to the audio frequency and video field, relate to a kind of sound console, relate in particular to a kind of sound console of eliminating echo, in addition, the invention still further relates to and utilize this sound console to eliminate the method for echo.
Background technology
Present sound console does not have echo cancellation function, can only in a meeting room, use, if use software video meeting or audio frequency echo can occur when chatting.
As, in the network teleconference, side speech, this sound is transferred to the other end of video conference on the one hand through microphone, send through local terminal audio output apparatus such as audio amplifiers on the other hand; At this moment, the sound that sends from audio amplifier also can follow voice to be transferred to the other end of video conference from microphone, causes echo.
Summary of the invention
Technical problem to be solved by this invention is: a kind of sound console that can effectively eliminate echo is provided.
In addition, the present invention also provides the method for utilizing above-mentioned sound console to eliminate echo.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of sound console of eliminating echo; Comprise input interface unit and output interface unit; Said input interface unit comprises at least one first input interface, reaches at least one second input interface; Said first input interface connects microphone, and said second input interface connects the local terminal audio output apparatus; Said output interface unit comprises at least one first output interface, reaches at least one second output interface, and said first output interface is connected to the local audio collecting device, and said second output interface is connected to audio-frequency power amplifier; Said sound console also comprises the echo cancellation unit, and the input of this echo cancellation unit connects above-mentioned first input interface, second input interface, and the output of said echo cancellation unit connects said first output interface.
As a kind of preferred version of the present invention, said echo cancellation unit comprises main audio input interface, reference audio input interface, audio output interface, analog-to-digital conversion module, digital signal processing module, D/A converter module; Said main audio input interface, reference audio input interface are connected with said analog-to-digital conversion module respectively, and said audio output interface is connected with said D/A converter module; Said digital signal processing module is connected with said analog-to-digital conversion module, D/A converter module respectively.
As a kind of preferred version of the present invention, said digital signal processing module is through the morbid sound of comparing said microphone output, the sound that reaches local terminal audio output apparatus output; From the morbid sound of microphone output, eliminate the sound of local terminal audio output apparatus output and only keep the voice in the microphone.
As a kind of preferred version of the present invention, said digital signal processing module is the TMS320C6713 chip.
As a kind of preferred version of the present invention, said analog-to-digital conversion module, D/A converter module are the AIC23 chip.
As a kind of preferred version of the present invention, said local audio collecting device is a computer equipment.
Utilize above-mentioned sound console to eliminate the method for echo, comprise the steps:
The sound of the sound of steps A, microphone output and the output of local terminal audio output apparatus exports audio-frequency power amplifier to through said sound console;
Step B, through the morbid sound of microphone output through the main audio input interface, and analog-to-digital conversion module transfer to said digital signal processing module; The sound of local terminal audio output apparatus output through the reference audio input interface, and analog-to-digital conversion module transfer to said digital signal processing module;
Step C, said digital signal processing module are compared morbid sound, and the sound of local terminal audio output apparatus output of said microphone output;
Step D, from the morbid sound of microphone output, eliminate the sound of local terminal audio output apparatus output and only keep the voice in the microphone;
Step e, voice output to the local audio collecting device of the said reservation of step D.
As a kind of preferred version of the present invention; Step D comprises step D1: be converted into the terminal audio frequency digital signal to said local terminal audio output apparatus output sound through said analog-to-digital conversion module; Be converted into the mixed audio digital signal from the morbid sound of microphone output through said analog-to-digital conversion module, subtracting each other with the identical part of said terminal audio frequency digital signal in the said mixed audio digital signal.
As a kind of preferred version of the present invention, step D also comprises step D2: judge that whether said mixed audio digital signal and said terminal audio frequency digital signal also have same section, if having, and execution in step D1 once more.
Beneficial effect of the present invention is: the present invention is through adding the echo cancellation unit in sound console; From the morbid sound of microphone output, eliminate the sound of local terminal audio output apparatus output and only keep the voice in the microphone, thereby can realize the requested session of video better; In addition, the user need not acquire special echo cancellation equipment, easy to use and maintenance.
Description of drawings
Fig. 1 is the composition sketch map of sound console of the present invention.
Fig. 2 is the composition sketch map of echo cancellation of the present invention unit.
Fig. 3 eliminates the flow chart of echo method for the present invention.
Embodiment
Specify the preferred embodiments of the present invention below in conjunction with accompanying drawing.
See also Fig. 1, the present invention has disclosed a kind of sound console of eliminating echo, comprises echo cancellation unit 1, input interface unit, output interface unit.
Said input interface unit comprises first input interface unit 2, and second input interface unit 3; Said first input interface unit 2 connects microphone, and it comprises at least one first input interface 21, comprises two first input interfaces 21 in the present embodiment; Second input interface unit, 3 connection local terminal audio output apparatus (like audio amplifier etc.), it comprises at least one second input interface 31, comprises three second input interfaces 31 in the present embodiment.
Said output interface unit comprises the first output interface unit 4, the second output interface unit 5; The first output interface unit 4 is connected to the local audio collecting device, and it comprises at least one first output interface 41, comprises three first output interfaces 41 in the present embodiment; The second output interface unit 5 is connected to audio-frequency power amplifier, and it comprises at least one second output interface 51, comprises two second output interfaces 51 in the present embodiment.
The input of echo cancellation unit 1 connects above-mentioned first input interface 21, second input interface 31, and the output of said echo cancellation unit connects said first output interface 41.
See also Fig. 2, said echo cancellation unit 1 comprises digital signal processing module 11, analog-to-digital conversion module 12, D/A converter module 13, main audio input interface 14, reference audio input interface 15, audio output interface 16; Said main audio input interface 14, reference audio input interface 15 are connected with said analog-to-digital conversion module 12 respectively, and said audio output interface 16 is connected with said D/A converter module 13; Said digital signal processing module 11 is connected with said analog-to-digital conversion module 12, D/A converter module 13 respectively.In the present embodiment, digital signal processing module 11 is the TMS320C6713 chip, and analog-to-digital conversion module 12, D/A converter module 13 are the AIC23 chip.
As shown in the figure; Sound process analog-to-digital conversion module 12 processing through main audio input interface 14,15 transmission of reference audio input interface are converted into digital signal; Transfer to digital signal processing module 11 and handle, digital signal processing module 11 is realized functions such as echo cancellation, feedback inhibition, frequency adjustment; Give D/A converter module 13 after disposing and be converted into analog signal; And export the local audio collecting device to through audio output interface 16, thereby realize local recording or audio-frequency information through the far-end in computer equipment and Network Transmission to the video conference.Said local audio collecting device is a computer equipment.
See also Fig. 3, introduce the method that above-mentioned sound console is eliminated echo through Fig. 3, this method comprises the steps:
The sound of the sound of steps A, microphone output and the output of local terminal audio output apparatus exports audio-frequency power amplifier to through said sound console.
Step B, through the morbid sound of microphone output through the main audio input interface, and analog-to-digital conversion module transfer to said digital signal processing module; The sound of local terminal audio output apparatus output through the reference audio input interface, and analog-to-digital conversion module transfer to said digital signal processing module.
Step C, said digital signal processing module are compared morbid sound, and the sound of local terminal audio output apparatus output of said microphone output.
Step D, from the morbid sound of microphone output, eliminate the sound of local terminal audio output apparatus output and only keep the voice in the microphone.Specific as follows:
Step D1: be converted into the terminal audio frequency digital signal to said local terminal audio output apparatus output sound through said analog-to-digital conversion module; Be converted into the mixed audio digital signal from the morbid sound of microphone output through said analog-to-digital conversion module, subtracting each other with the identical part of said terminal audio frequency digital signal in the said mixed audio digital signal.
Step D2: judge that whether said mixed audio digital signal and said terminal audio frequency digital signal also have same section, if having, execution in step D1 once more is not if there is execution in step E.
Step e, voice output to the local audio collecting device of the said reservation of step D.In the present embodiment, said local audio collecting device is a computer equipment.
The present invention is through adding the echo cancellation unit in sound console, from the morbid sound of microphone output, eliminate the sound of local terminal audio output apparatus output and only keep the voice in the microphone, thereby can realize the requested session of video better; In addition, the user need not acquire special echo cancellation equipment, easy to use and maintenance.
Above embodiment is the unrestricted technical scheme of the present invention in order to explanation only.Do not break away from any modification or the local replacement of spirit and scope of the invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (5)
1. the sound console that can eliminate echo; Comprise input interface unit and output interface unit; Said input interface unit comprises at least one first input interface, reaches at least one second input interface; Said first input interface connects microphone, and said second input interface connects the local terminal audio output apparatus; Said output interface unit comprises at least one first output interface, reaches at least one second output interface, and said first output interface is connected to the local audio collecting device, and said second output interface is connected to audio-frequency power amplifier; It is characterized in that:
Said sound console also comprises the echo cancellation unit; The input of this echo cancellation unit connects above-mentioned first input interface, second input interface; The output of said echo cancellation unit connects said first output interface, and said echo cancellation unit comprises main audio input interface, reference audio input interface, audio output interface, analog-to-digital conversion module, digital signal processing module, D/A converter module; Said main audio input interface, reference audio input interface are connected with said analog-to-digital conversion module respectively, and said audio output interface is connected with said D/A converter module; Said digital signal processing module is connected with said analog-to-digital conversion module, D/A converter module respectively, and said digital signal processing module is through the morbid sound of comparing said microphone output, the sound that reaches local terminal audio output apparatus output; From the morbid sound of microphone output, remove the sound of local terminal audio output apparatus output and only keep the voice in the microphone; Wherein, Said digital signal processing module is in order to echo cancellation, feedback inhibition, frequency adjustment; And after disposing, give D/A converter module and be converted into analog signal, and export the local audio collecting device to through audio output interface.
2. sound console according to claim 1 is characterized in that: said digital signal processing module is the TMS320C6713 chip.
3. sound console according to claim 1 is characterized in that: said analog-to-digital conversion module, D/A converter module are the AIC23 chip.
4. sound console according to claim 1 is characterized in that: said local audio collecting device is a computer equipment.
5. utilize the said sound console of claim 2 to eliminate the method for echo, it is characterized in that: this method comprises the steps:
The sound of the sound of steps A, microphone output and the output of local terminal audio output apparatus exports audio-frequency power amplifier to through said sound console;
Step B, through the morbid sound of microphone output through the main audio input interface, and analog-to-digital conversion module transfer to said digital signal processing module; The sound of local terminal audio output apparatus output through the reference audio input interface, and analog-to-digital conversion module transfer to said digital signal processing module;
The morbid sound that step C, said digital signal processing module are exported through the said microphone of comparison, the sound that reaches local terminal audio output apparatus output; Wherein, Said digital signal processing module is in order to echo cancellation, feedback inhibition, frequency adjustment; And after disposing, give D/A converter module and be converted into analog signal, and export the local audio collecting device to through audio output interface;
Step D, from the morbid sound of microphone output, eliminate the sound of local terminal audio output apparatus output and only keep the voice in the microphone, step D comprises:
Step D1: be converted into the terminal audio frequency digital signal to said local terminal audio output apparatus output sound through said analog-to-digital conversion module; Be converted into the mixed audio digital signal from the morbid sound of microphone output through said analog-to-digital conversion module, subtracting each other with the identical part of said terminal audio frequency digital signal in the said mixed audio digital signal;
Step D2: judge that whether said mixed audio digital signal and said terminal audio frequency digital signal also have same section, if having, execution in step D1 once more;
Step e, voice output to the local audio collecting device of the said reservation of step D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100351892A CN101262252B (en) | 2008-03-26 | 2008-03-26 | Tuning station for eliminating echo and method for eliminating echo based this station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100351892A CN101262252B (en) | 2008-03-26 | 2008-03-26 | Tuning station for eliminating echo and method for eliminating echo based this station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101262252A CN101262252A (en) | 2008-09-10 |
| CN101262252B true CN101262252B (en) | 2012-01-04 |
Family
ID=39962504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100351892A Active CN101262252B (en) | 2008-03-26 | 2008-03-26 | Tuning station for eliminating echo and method for eliminating echo based this station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101262252B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103761970B (en) * | 2013-12-31 | 2016-09-28 | 青岛歌尔声学科技有限公司 | A kind of audio-frequency processing method and device and a kind of electronic equipment |
| CN106535055B (en) * | 2017-01-17 | 2019-05-07 | 潍坊学院 | Sound system with coding display and authentication function |
| CN110191244B (en) * | 2019-05-17 | 2021-08-31 | 四川易简天下科技股份有限公司 | Remote interaction method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5384843A (en) * | 1992-09-18 | 1995-01-24 | Fujitsu Limited | Hands-free telephone set |
| CN1728886A (en) * | 2004-07-29 | 2006-02-01 | 中兴通讯股份有限公司 | Microphone possessing function for cancelling out echo |
| CN200987901Y (en) * | 2006-12-15 | 2007-12-12 | 纬创资通股份有限公司 | Game controller |
-
2008
- 2008-03-26 CN CN2008100351892A patent/CN101262252B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5384843A (en) * | 1992-09-18 | 1995-01-24 | Fujitsu Limited | Hands-free telephone set |
| CN1728886A (en) * | 2004-07-29 | 2006-02-01 | 中兴通讯股份有限公司 | Microphone possessing function for cancelling out echo |
| CN200987901Y (en) * | 2006-12-15 | 2007-12-12 | 纬创资通股份有限公司 | Game controller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101262252A (en) | 2008-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103458137A (en) | Systems and methods for voice enhancement in audio conference | |
| CN105611222A (en) | Voice data processing method, device and system and controlled device | |
| CN100477675C (en) | Bluetooth handset being able to realize wireless audio output | |
| CN101262252B (en) | Tuning station for eliminating echo and method for eliminating echo based this station | |
| CN204216969U (en) | A kind of voice-communication device of novel meeting stereo process | |
| CN103366757A (en) | Communication system and method with echo cancellation mechanism | |
| CN102325230A (en) | Processing method and system for eliminating echoes and digital microphone | |
| CN102097115B (en) | Audio frequency playing method and mobile terminal | |
| CN201167379Y (en) | Videoconference system and echo eliminating apparatus for the same | |
| CN106603877A (en) | Collaborative conference voice collection method and apparatus | |
| CN214154670U (en) | Dual-hot backup video conference system | |
| CN201430636Y (en) | TV set top box | |
| CN105491302A (en) | Audio signal output method and device, terminal, and system | |
| CN201216010Y (en) | Microphone with echo eliminating function equipped with USB sound card and loudspeaker | |
| CN102143350A (en) | Video phone conference system | |
| CN202004895U (en) | Video telephone conference system | |
| CN101163136B (en) | Method of broadcasting telephonist number using session inceptive protocol soft terminal | |
| CN220830535U (en) | Conference terminal with voice noise reduction function | |
| CN108307137A (en) | A method of mobile phone is optimized into video calling sound quality as IPTV set top box source of sound input equipment | |
| CN218998232U (en) | Microphone echo cancellation control circuit | |
| WO2006065289A1 (en) | Amplifier for use with voice over internet protocol signal | |
| CN106454637A (en) | Audio module silencing structure and method of server system | |
| CN213028316U (en) | Integrated high-definition audio and video communication equipment | |
| CN103078929A (en) | Three-in-one audio set transmission control system | |
| CN218734483U (en) | Video conference terminal based on Dante interface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |