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.
|Number of pages||7|
|Journal||Denki Tsushin Kenkyujo kenkyu jitsuyoka hokoku|
|Publication status||Published - 1988|
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