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Method and equipment for use in packet acoustic echo cancellation

A technology of acoustic echo cancellation and echo cancellation, which is applied in the field of communication to improve performance and reduce buffer consumption

Inactive Publication Date: 2015-07-08
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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  • Method and equipment for use in packet acoustic echo cancellation
  • Method and equipment for use in packet acoustic echo cancellation
  • Method and equipment for use in packet acoustic echo cancellation

Examples

Experimental program
Comparison scheme
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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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PUM

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Abstract

An object of the invention is providing a method and device for packet acoustic echo cancellation. The echo cancelling device obtains one or more source voice packet streams in a multi-party call, selects packets from the one or more source voice packet streams so as to obtain a broadcasted stream corresponding to the multi-party call, cancels echo in a target packet stream corresponding to the broadcasted stream based on a reference packet stream corresponding to the broadcasted stream, so as to obtain the echo-cancelled packet stream corresponding to the target packet stream, and finally broadcasts the echo-cancelled packet stream to participants in the multi-party call. Compared with the prior art, the present invention realizes packet acoustic echo cancellation for a multi-party call, reduces the buffer consumption, channel allocation and corresponding overheads of maintenance and signaling for packet acoustic echo cancellation, enhances the performance of packet acoustic echo cancellation, and makes the performance of packet 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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IPC IPC(8): H04M9/08H04L29/06
CPCH04M9/082
Inventor 李舟洲蔡亦钢
Owner ALCATEL LUCENT SAS
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