AUDIO TELECONFERENCING SET WITH MULTIPATH ECHO CANCELLER.

被引：0

作者：

Oikawa, Hiroshi ^{[1
]}

Koizumi, Nobuo ^{[1
]}

Makino, Shoji ^{[1
]}

机构：

[1] NTT, Jpn, NTT, Jpn

来源：

Reports of the Electrical Communication Laboratory | 1988年 / 36卷 / 02期

关键词：

DIGITAL COMMUNICATION SYSTEMS - Voice/Data Integrated Services;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

An audio teleconferencing set with an acoustic echo canceller has been developed which eliminates acoustic coupling and echo feedback, and allows full open and life-like conversation. It is designed to be used with a multiple microphone system containing gain switching. The echo canceller is provided with memories for multiple echo paths so that filter coefficients may be updated when an echo path is switched due to a change of actuated microphone when speaker alternation occurs. Delay processing time of 0. 5 sec. for 7 kHz band signal is achieved by using digital signal processor chips.

引用

页码：217 / 223

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