CN102456352A - Background audio frequency processing device and method - Google Patents
Background audio frequency processing device and method Download PDFInfo
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- CN102456352A CN102456352A CN2010105239256A CN201010523925A CN102456352A CN 102456352 A CN102456352 A CN 102456352A CN 2010105239256 A CN2010105239256 A CN 2010105239256A CN 201010523925 A CN201010523925 A CN 201010523925A CN 102456352 A CN102456352 A CN 102456352A
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Abstract
The invention discloses a background audio frequency processing device and method. The device comprises an environmental sound input unit, a correspondent sound input unit, a difference processing unit and an audio frequency synthesizing unit, wherein the environmental sound input unit is used for receiving sounds of the environment of a correspondent; the correspondent sound input unit is used for receiving the sounds of the correspondent; the difference processing unit is used for carrying out difference processing on the correspondent sounds and the environmental sounds to extract the pure correspondent sounds; and the audio frequency synthesizing unit is used for synthesizing the pure video correspondent sounds with the needed background sounds. The device is used for extracting the sounds of the correspondent and overlapping the sounds with the needed background sounds, so as to ensure that the background sounds of the video correspondent are completely eliminated and the sounds with the changed background are output. The invention further discloses a background audio frequency processing method.
Description
Technical field
The invention belongs to the audio signal processing technique field, relate in particular to a kind of background audio treating apparatus and disposal route.
Background technology
At present, Internet video has obtained developing rapidly, particularly along with the development of IPTV technology, realizes that on Web TV Internet video becomes very general.But the ubiquitous problem of Internet video be the user when utilizing network video device to carry out Internet video, tend to demonstrate the background of back, in order to change background; Develop and panoramic technology; But after the change background, often can't cover the sound of video communication person's environment of living in, particularly various noises; Existing microphone also can't receive only video communication person's business, and does not accept environmental noise.
This just causes video communication person's background to change, but whole ambient sound and background misfit.The method that adopts at present usually is to set a threshold value, when sound during greater than this threshold value, just can be received by audio devices, and it is very little and above the situation of threshold value that this way is only applicable to noise.When surpassing this threshold value, can't handle.
Therefore, be necessary to provide a kind of method that can change video communication person's ambient sound of living in.
Summary of the invention
The object of the present invention is to provide a kind of background audio treating apparatus and disposal route, be intended to solve the problem that can't change background sound in video communication person's environment of living in the prior art.
The present invention is achieved in that a kind of background audio treating apparatus, and this device comprises: ambient sound input block, the sound of received communication person environment of living in; Correspondent's sound input block, received communication person's sound; Difference processing is done with correspondent's sound and ambient sound in the difference processing unit, extracts pure correspondent's sound; The audio frequency synthesis unit synthesizes pure video communication person's sound and required background sound.
In this background audio treating apparatus, correspondent's sound input block is compared than ambient sound input block, near the correspondent; This difference processing unit is a difference channel.
In addition, this background audio treating apparatus also comprises noise reduction unit, after correspondent's sound that this noise reduction unit is extracted the difference processing unit carries out noise reduction process, exports this audio frequency synthesis unit to; This background audio treating apparatus also comprises audio coding unit and transmission unit, and the sound after audio coding unit synthesizes the audio frequency synthesis unit is encoded, and the sound after will encoding transfers to network through transmission unit.
The present invention also provides a kind of background audio disposal route, and this method comprises the steps: step S1, input environment sound and correspondent's sound; Step S2 obtains pure correspondent's sound; Step S3 synthesizes required background sound and pure correspondent's sound.Wherein, among the step S2, ambient sound and correspondent's sound are carried out difference processing, obtain pure correspondent's sound; After carrying out difference processing, also pure correspondent's sound is carried out noise reduction process, make correspondent's sound further pure.
In addition, this method also comprises step S4, transmission after synthetic sound is encoded.
This background audio treating apparatus and disposal route thereof extract correspondent's sound, superpose with required background sound then, just can guarantee that video communication person's background sound is eliminated fully, output be through changing the sound of background.
Description of drawings
Fig. 1 is the block diagram of background audio treating apparatus of the present invention;
Fig. 2 is the process flow diagram of background audio disposal route of the present invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, be the block diagram of background audio treating apparatus of the present invention.This background audio treating apparatus comprises ambient sound input block 11, correspondent's sound input block 12, difference processing unit 13, noise reduction unit 14, audio frequency synthesis unit 15, audio coding unit 16, transmission unit 17.
The sound of ambient sound input block 11 received communication persons environment of living in for example adopts microphone.Correspondent's sound input block 12, received communication person's sound.But in reality; Ambient sound input block 11 is except reception environment sound; Unavoidably can receive correspondent's sound, correspondent's sound input block 12 also unavoidably can receive outside ambient sound, in order to reduce this kind influence; Generally with correspondent's sound input block 12 near the correspondent, and with ambient sound input block 11 be provided with away from the correspondent.Ambient sound input block 11 all is input to difference processing unit 13 with the sound that correspondent's sound input block 12 receives.
The sound of correspondent's sound that difference processing unit 13 receives correspondent's sound input block 12 and 11 inputs of ambient sound input block is done difference processing; Like this; The sound of preserving is to be pure correspondent's sound basically, but the system noise that this sound is introduced when having comprised difference processing.Difference processing unit 13 is difference channel and similar circuit normally.Sound after the treating apparatus of checking the mark will be handled is input to noise reduction unit 14.
14 pairs of sound that receive of noise reduction unit carry out noise reduction process, the system noise that normally reduction system brings, and the sound after noise reduction unit 14 is handled is exactly purer correspondent's sound.Arrive this, the sound that is about to the correspondent is complete from the mixed and disorderly sound that comprises correspondent's sound and ambient sound to be peeled off out.Noise reduction unit 14 will be purer correspondent's voice output to audio frequency synthesis unit 15.
Audio frequency synthesis unit 15 is input to audio coding unit 16 after video communication person's sound and required background sound are synthesized.Sound after 16 pairs of audio coding units synthesize is encoded, and is convenient in network, transmit.Sound after 17 of transmission units will be encoded is through the correspondent of Network Transmission to the opposing party.
This background audio treating apparatus extracts correspondent's sound, superposes with required background sound then, just can guarantee that video communication person's background sound is eliminated fully, output be through changing the sound of background.
Fig. 2 is the process flow diagram of background audio disposal route of the present invention.This background audio disposal route comprises that step is following:
Step S1, input environment sound and correspondent's sound;
Being main with ambient sound in the ambient sound, comprising less correspondent's sound, is main with correspondent's sound in correspondent's sound, comprises less ambient sound;
Step S2 obtains pure correspondent's sound;
Ambient sound and correspondent's sound are carried out difference processing, and correspondent's sound is just purer like this, but during difference processing, has introduced system noise, also need carry out noise reduction process, like this, obtains pure correspondent's sound;
Step S3 synthesizes required background sound and pure correspondent's sound;
In this step, required background sound can be the sound of liking according to the selected sound of correspondent's picture background or correspondent;
Step S4 is with the back transmission of encoding of synthetic sound;
Synthetic sound is encoded the transfer voice after being convenient to like this will synthesize through network.
This method superposes with required background sound through extracting correspondent's sound then, just can guarantee that video communication person's background sound is eliminated fully, output be sound through the change background.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. background audio treating apparatus, this device comprises:
The ambient sound input block, the sound of received communication person environment of living in;
Correspondent's sound input block, received communication person's sound;
Difference processing is done with correspondent's sound and ambient sound in the difference processing unit, extracts pure correspondent's sound;
The audio frequency synthesis unit synthesizes pure video communication person's sound and required background sound.
2. background audio treating apparatus according to claim 1 is characterized in that, correspondent's sound input block is compared than ambient sound input block, near the correspondent.
3. background audio treating apparatus according to claim 1 is characterized in that the difference processing unit is a difference channel.
4. background audio treating apparatus according to claim 1 is characterized in that the background audio treating apparatus also comprises noise reduction unit, after correspondent's sound that this noise reduction unit is extracted the difference processing unit carries out noise reduction process, exports this audio frequency synthesis unit to.
5. background audio treating apparatus according to claim 4; It is characterized in that; The background audio treating apparatus also comprises audio coding unit and transmission unit, and the sound after audio coding unit synthesizes the audio frequency synthesis unit is encoded, and the sound after will encoding transfers to network through transmission unit.
6. a background audio disposal route comprises the steps:
Step S1, input environment sound and correspondent's sound;
Step S2 obtains pure correspondent's sound;
Step S3 synthesizes required background sound and pure correspondent's sound.
7. background audio disposal route according to claim 6 is characterized in that, among the step S2, ambient sound and correspondent's sound is carried out difference processing, obtains pure correspondent's sound.
8. background audio disposal route according to claim 7 is characterized in that, among the step S2, among the step S2, carry out difference processing after, also pure correspondent's sound is carried out noise reduction process, make correspondent's sound further pure.
9. background audio disposal route according to claim 6 is characterized in that this method also comprises step S4, transmission after synthetic sound is encoded.
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| CN2010105239256A CN102456352A (en) | 2010-10-26 | 2010-10-26 | Background audio frequency processing device and method |
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| CN2010105239256A CN102456352A (en) | 2010-10-26 | 2010-10-26 | Background audio frequency processing device and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102915732A (en) * | 2012-10-31 | 2013-02-06 | 黑龙江省电力有限公司信息通信分公司 | Method and device for identifying voice commands restraining background broadcasts |
| CN104036782A (en) * | 2013-03-06 | 2014-09-10 | 联想(北京)有限公司 | Noise reduction method and handheld mobile terminal |
| CN104658535A (en) * | 2015-02-26 | 2015-05-27 | 深圳市中兴移动通信有限公司 | Voice control method and device |
| CN106779679A (en) * | 2016-11-28 | 2017-05-31 | 同济大学 | A kind of mobile-payment system based on visible light communication |
| CN111837183A (en) * | 2018-03-09 | 2020-10-27 | 雅马哈株式会社 | Sound processing method, sound processing device and recording medium |
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| US5869783A (en) * | 1997-06-25 | 1999-02-09 | Industrial Technology Research Institute | Method and apparatus for interactive music accompaniment |
| CN1953059A (en) * | 2006-11-24 | 2007-04-25 | 北京中星微电子有限公司 | A method and device for noise elimination |
| CN101056322A (en) * | 2006-04-13 | 2007-10-17 | 中兴通讯股份有限公司 | A device and method for overlapping the background sound at the mobile communication terminal |
| CN101123629A (en) * | 2006-08-08 | 2008-02-13 | 英华达(上海)电子有限公司 | An environmental noise filtering method and device for mobile phone |
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| US5869783A (en) * | 1997-06-25 | 1999-02-09 | Industrial Technology Research Institute | Method and apparatus for interactive music accompaniment |
| CN1205499A (en) * | 1997-07-11 | 1999-01-20 | 财团法人工业技术研究院 | Interactive musical accompaniment method and equipment |
| CN101056322A (en) * | 2006-04-13 | 2007-10-17 | 中兴通讯股份有限公司 | A device and method for overlapping the background sound at the mobile communication terminal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102915732A (en) * | 2012-10-31 | 2013-02-06 | 黑龙江省电力有限公司信息通信分公司 | Method and device for identifying voice commands restraining background broadcasts |
| CN104036782A (en) * | 2013-03-06 | 2014-09-10 | 联想(北京)有限公司 | Noise reduction method and handheld mobile terminal |
| CN104658535A (en) * | 2015-02-26 | 2015-05-27 | 深圳市中兴移动通信有限公司 | Voice control method and device |
| CN106779679A (en) * | 2016-11-28 | 2017-05-31 | 同济大学 | A kind of mobile-payment system based on visible light communication |
| CN111837183A (en) * | 2018-03-09 | 2020-10-27 | 雅马哈株式会社 | Sound processing method, sound processing device and recording medium |
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