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A method and device for group acoustic echo cancellation

An acoustic echo cancellation and echo cancellation technology, applied in the field of communication, to achieve the effect of improving performance and reducing buffer consumption

Inactive Publication Date: 2017-11-03
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 2. Far end echo
[0007] 3. Adjacency Echo
[0013] The downside of this approach is obvious - it requires allocation of PAEC channels for all parties involved

Method used

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  • A method and device for group acoustic echo cancellation
  • A method and device for group acoustic echo cancellation
  • A method and device for group acoustic echo cancellation

Examples

Experimental program
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Embodiment Construction

[0043] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0044] Figure 8 A schematic diagram of an echo cancellation device for packet acoustic echo cancellation according to one aspect of the present invention is shown; Specifically, obtaining means 1 obtains one or more source voice packet streams in a multi-party call to be subjected to packet acoustic echo cancellation, wherein each source voice packet stream originates from a call end in the multi-party call; selecting means 2 obtains from Select a packet from the one or more source voice packet streams to obtain a broadcast stream corresponding to the multi-party call; the elimination device 3 performs a target call corresponding to the broadcast stream according to the reference packet stream corresponding to the broadcast stream. Echo cancellation is performed on the packet stream to obtain an echo-cancelled packet stream corresponding to the target packe...

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Abstract

The object of the present invention is to provide a method and device for group acoustic echo cancellation. The echo canceling device obtains one or more source voice packet streams in the same multi-party call to be subjected to packet acoustic echo cancellation, and selects packets from the one or more source voice packet streams, so as to obtain a broadcast corresponding to the multi-party call stream, according to the reference packet stream corresponding to the broadcast stream, perform echo cancellation on the target packet stream corresponding to the broadcast stream, so as to obtain the echo-cancelled packet stream corresponding to the target packet stream, and finally the A stream of echo-canceled packets is broadcast to peers in the multi-party call. Compared with the prior art, the present invention realizes packet echo cancellation for multi-party calls, reduces buffer consumption, channel allocation and corresponding maintenance and signaling overhead for packet acoustic echo cancellation, and improves the performance of packet acoustic echo cancellation And make the performance of group acoustic echo cancellation independent of the number of participants.

Description

technical field [0001] The present invention relates to the field of communication, in particular to a technique for group acoustic echo cancellation. Background technique [0002] In packet-based networks, media servers provide a variety of basic and enhanced services such as conferencing, audio and video interactive voice response (IVR), transcoding, audio and video notifications, and others Advanced Voice Services. The conferencing facility of the media server allows several participants to join a conference. figure 1 A simplified N-party (N=3) audio conferencing model is shown. The media server that provides conference services supports three-party audio conferences. The three participants are A, B, and C. The media server can implement transcoding for each conference participant to ensure that the packet voice received from each participant can be transcoded into a unified codec type (codec type), so that the subsequent "mixing" of the conference facility Tone" fun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M9/08H04L29/06
CPCH04M9/082
Inventor 李舟洲蔡亦钢
Owner ALCATEL LUCENT SAS
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