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System and method for improving quality of multichannel audio call

An audio call and multi-channel technology, applied in two-way working systems, video conferencing systems, subscriber special services, etc., can solve problems such as difficult echo and noise processing, and achieve the effect of improving call quality, ensuring realism, and improving quality

Active Publication Date: 2009-05-06
SHANGHAI AVCON INFORMATION TECH
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AI Technical Summary

Problems solved by technology

[0006] But this method uses an independent adaptive filter, it is difficult to expand from two channels to more channels for echo and noise processing

Method used

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  • System and method for improving quality of multichannel audio call
  • System and method for improving quality of multichannel audio call
  • System and method for improving quality of multichannel audio call

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Embodiment Construction

[0031] The system for improving the quality of multi-channel audio communication of the present invention The technical problem to be solved by the present invention is to provide a multi-channel echo noise cancellation system and combine it into a set of audio processing system to achieve the realism and high fidelity of multi-channel audio communication audio quality.

[0032] In order to solve the problem of echo and noise in multiple channels, the present invention proposes a multi-channel echo cancellation and noise cancellation system. This system is easy to expand and implement, and has an efficient echo noise cancellation function. It completely solves the problem of sound processing in multi-channel systems.

[0033] The whole system adopts the following principles and design ideas:

[0034] 1>Two (or more) microphones are used as signal input terminals, and each microphone corresponds to a collection and playback device (AD / DA chip or sound card). Only in this way...

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Abstract

A system for improving multi-channel audio speech quality, is provided with at least two audio collecting devices and at least two audio playback apparatus at local, wherein, each audio collecting device correspondingly collects an audio signal, each audio playback apparatus correspondingly outputs a reference signal. The system for improving multi-channel audio speech quality further includes several reecho path processing modules, wherein, the audio signal collected by each audio collecting device and the reference signal output by each audio playback apparatus adopt a hierarchical combination mode to realize the improvement of multi-channel audio speech quality by these reecho processing modules, the noise in the audio signal can be effectively removed by using a hierarchical combination mode to estimate residual reecho and noise of multi-channel audio signals, thereby greatly improving the speech quality and realizing channel expansion easily.

Description

technical field [0001] The invention relates to a system and method for improving the quality of multi-channel audio communication. In particular, it relates to a system and method for eliminating noise and echo and multi-channel audio communication quality. Background technique [0002] At present, mainstream video conferencing systems have begun to use two-channel or multi-channel audio technology, and echo and noise interference have become the biggest problems in the system. [0003] Usually, the echo is caused by an acoustic loop between the speaker and the microphone, that is, after the signal from one end of the call is played by the speaker at the other end of the call, it will be picked up by the microphone at the end of the call and sent back to the end of the call. of talkers are able to hear their own echo, severely affecting call quality. In addition, the steady state or non-stationary noise signal generated by the surrounding environment of the microphone als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M3/56H04N7/15
Inventor 刘睿刘晓露熊模昌
Owner SHANGHAI AVCON INFORMATION TECH
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