AUDIO TELECONFERENCING SET WITH MULTI-PATH ECHO CANCELLER.

Hiroshi Oikawa, Nobuo Koizumi, Shoji Makino

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

An Audio Conferencing Set with an acoustic echo canceller has been developed which eliminates acoustic coupling and echo feedback, and allows fully open and life-like conversation. It is designed to be used with 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 echo path is switched due to a change of actuated microphone when speaker alternation occurs. Delay processing time of 0. 5 sec. for 7kHz band signal is achieved by using digital signal processor chips.

Original languageEnglish
Pages (from-to)191-197
Number of pages7
JournalDenki Tsushin Kenkyujo kenkyu jitsuyoka hokoku
Volume37
Issue number2
Publication statusPublished - 1988
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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