CN101262252A - 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
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- CN101262252A CN101262252A CNA2008100351892A CN200810035189A CN101262252A CN 101262252 A CN101262252 A CN 101262252A CN A2008100351892 A CNA2008100351892 A CN A2008100351892A CN 200810035189 A CN200810035189 A CN 200810035189A CN 101262252 A CN101262252 A CN 101262252A
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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 use in a meeting room, 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 by microphone, send by 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, described input interface unit comprises at least one first input interface, reaches at least one second input interface, described first input interface connects microphone, and described second input interface connects the local terminal audio output apparatus; Described output interface unit comprises at least one first output interface, reaches at least one second output interface, and described first output interface is connected to the local audio collecting device, and described second output interface is connected to audio-frequency power amplifier; Described 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 described echo cancellation unit connects described first output interface.
As a preferred embodiment of the present invention, described 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; Described main audio input interface, reference audio input interface are connected with described analog-to-digital conversion module respectively, and described audio output interface is connected with described D/A converter module; Described digital signal processing module is connected with described analog-to-digital conversion module, D/A converter module respectively.
As a preferred embodiment of the present invention, described digital signal processing module is by the morbid sound of comparing described microphone output, the sound that reaches local terminal audio output apparatus output; The sound of local terminal audio output apparatus output eliminated from the morbid sound of microphone output and only keep voice in the microphone.
As a preferred embodiment of the present invention, described digital signal processing module is the TMS320C6713 chip.
As a preferred embodiment of the present invention, described analog-to-digital conversion module, D/A converter module are the AIC23 chip.
As a preferred embodiment of the present invention, described 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 by described sound console;
Step B, through the morbid sound of microphone output by the main audio input interface, and analog-to-digital conversion module transfer to described digital signal processing module; The sound of local terminal audio output apparatus output by the reference audio input interface, and analog-to-digital conversion module transfer to described digital signal processing module;
Step C, described digital signal processing module are compared morbid sound, and the sound of local terminal audio output apparatus output of described microphone output;
Step D, the sound of local terminal audio output apparatus output eliminated from the morbid sound of microphone output and only keep voice in the microphone;
Step e, the voice output of the described reservation of step D to the local audio collecting device.
As a preferred embodiment of the present invention, step D comprises step D1: described local terminal audio output apparatus output sound is converted into the terminal audio frequency digital signal through described analog-to-digital conversion module, be converted into the mixed audio digital signal from the morbid sound of microphone output through described analog-to-digital conversion module, part identical with described terminal audio frequency digital signal in the described mixed audio digital signal is subtracted each other.
As a preferred embodiment of the present invention, step D also comprises step D2: judge that whether described mixed audio digital signal and described 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 by adding the echo cancellation unit in sound console, the sound of local terminal audio output apparatus output eliminated from the morbid sound of microphone output and only keep 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 schematic diagram of sound console of the present invention.
Fig. 2 is the composition schematic diagram of echo cancellation of the present invention unit.
Fig. 3 eliminates the flow chart of echo method for the present invention.
Embodiment
Describe the preferred embodiments of the present invention in detail 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.
Described input interface unit comprises first input interface unit 2, reaches second input interface unit 3; Described 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 connects local terminal audio output apparatus (as audio amplifier etc.), and it comprises at least one second input interface 31, comprises three second input interfaces 31 in the present embodiment.
Described 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 described echo cancellation unit connects described first output interface 41.
See also Fig. 2, described 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; Described main audio input interface 14, reference audio input interface 15 are connected with described analog-to-digital conversion module 12 respectively, and described audio output interface 16 is connected with described D/A converter module 13; Described digital signal processing module 11 is connected with described 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 by 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 by audio output interface 16, thereby realize local recording or audio-frequency information by computer equipment and the Network Transmission far-end to the video conference.Described local audio collecting device is a computer equipment.
See also Fig. 3, introduce the method that above-mentioned sound console is eliminated echo by 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 by described sound console.
Step B, through the morbid sound of microphone output by the main audio input interface, and analog-to-digital conversion module transfer to described digital signal processing module; The sound of local terminal audio output apparatus output by the reference audio input interface, and analog-to-digital conversion module transfer to described digital signal processing module.
Step C, described digital signal processing module are compared morbid sound, and the sound of local terminal audio output apparatus output of described microphone output.
Step D, the sound of local terminal audio output apparatus output eliminated from the morbid sound of microphone output and only keep voice in the microphone.Specific as follows:
Step D1: described local terminal audio output apparatus output sound is converted into the terminal audio frequency digital signal through described analog-to-digital conversion module, be converted into the mixed audio digital signal from the morbid sound of microphone output through described analog-to-digital conversion module, part identical with described terminal audio frequency digital signal in the described mixed audio digital signal is subtracted each other.
Step D2: judge that whether described mixed audio digital signal and described 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, the voice output of the described reservation of step D to the local audio collecting device.In the present embodiment, described local audio collecting device is a computer equipment.
The present invention is by adding the echo cancellation unit in sound console, the sound of local terminal audio output apparatus output is eliminated from the morbid sound of microphone output and only kept 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.Any modification or partial replacement that does not break away from spirit and scope of the invention all should be encompassed in the middle of the claim scope of the present invention.
Claims (9)
1, a kind of sound console of eliminating echo, comprise input interface unit and output interface unit, described input interface unit comprises at least one first input interface, reaches at least one second input interface, described first input interface connects microphone, and described second input interface connects the local terminal audio output apparatus; Described output interface unit comprises at least one first output interface, reaches at least one second output interface, and described first output interface is connected to the local audio collecting device, and described second output interface is connected to audio-frequency power amplifier; It is characterized in that:
Described 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 described echo cancellation unit connects described first output interface.
2, sound console according to claim 1 is characterized in that: described 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; Described main audio input interface, reference audio input interface are connected with described analog-to-digital conversion module respectively, and described audio output interface is connected with described D/A converter module; Described digital signal processing module is connected with described analog-to-digital conversion module, D/A converter module respectively.
3, sound console according to claim 2 is characterized in that: described digital signal processing module is by the morbid sound of comparing described microphone output, the sound that reaches local terminal audio output apparatus output; The sound of local terminal audio output apparatus output removed from the morbid sound of microphone output and only keep voice in the microphone.
4, according to claim 1 or 2 or 3 described sound consoles, it is characterized in that: described digital signal processing module is the TMS320C6713 chip.
5, according to claim 1 or 2 or 3 described sound consoles, it is characterized in that: described analog-to-digital conversion module, D/A converter module are the AIC23 chip.
6, according to claim 1 or 2 or 3 described sound consoles, it is characterized in that: described local audio collecting device is a computer equipment.
7, utilize the described 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 by described sound console;
Step B, through the morbid sound of microphone output by the main audio input interface, and analog-to-digital conversion module transfer to described digital signal processing module; The sound of local terminal audio output apparatus output by the reference audio input interface, and analog-to-digital conversion module transfer to described digital signal processing module;
The morbid sound that step C, described digital signal processing module are exported by the described microphone of comparison, the sound that reaches local terminal audio output apparatus output;
Step D, the sound of local terminal audio output apparatus output eliminated from the morbid sound of microphone output and only keep voice in the microphone;
Step e, the voice output of the described reservation of step D to the local audio collecting device.
8, method according to claim 7, it is characterized in that: step D comprises step D1: described local terminal audio output apparatus output sound is converted into the terminal audio frequency digital signal through described analog-to-digital conversion module, be converted into the mixed audio digital signal from the morbid sound of microphone output through described analog-to-digital conversion module, part identical with described terminal audio frequency digital signal in the described mixed audio digital signal is subtracted each other.
9, method according to claim 8 is characterized in that: step D also comprises step D2: judge that whether described mixed audio digital signal and described terminal audio frequency digital signal also have same section, if having, and execution in step D1 once more.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100351892A CN101262252B (en) | 2008-03-26 | 2008-03-26 | Tuning station for eliminating echo and method for eliminating echo based this station |
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| CN2008100351892A CN101262252B (en) | 2008-03-26 | 2008-03-26 | Tuning station for eliminating echo and method for eliminating echo based this station |
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| CN101262252B CN101262252B (en) | 2012-01-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103761970A (en) * | 2013-12-31 | 2014-04-30 | 青岛歌尔声学科技有限公司 | Audio processing method and device and electronic equipment |
| CN106535055A (en) * | 2017-01-17 | 2017-03-22 | 潍坊学院 | Audio system with code display and verification functions |
| CN110191244A (en) * | 2019-05-17 | 2019-08-30 | 四川易简天下科技股份有限公司 | Remote interaction method and system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06104970A (en) * | 1992-09-18 | 1994-04-15 | Fujitsu Ltd | Loudspeaking 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 |
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2008
- 2008-03-26 CN CN2008100351892A patent/CN101262252B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103761970A (en) * | 2013-12-31 | 2014-04-30 | 青岛歌尔声学科技有限公司 | Audio processing method and device and electronic equipment |
| 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 |
| CN106535055A (en) * | 2017-01-17 | 2017-03-22 | 潍坊学院 | Audio system with code display and verification functions |
| CN106535055B (en) * | 2017-01-17 | 2019-05-07 | 潍坊学院 | Sound system with coding display and authentication function |
| CN110191244A (en) * | 2019-05-17 | 2019-08-30 | 四川易简天下科技股份有限公司 | Remote interaction method and system |
| 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 |
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| CN101262252B (en) | 2012-01-04 |
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