Digital voice transmission having improved echo suppression
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United States of America Patent
Stats
-
Mar 24, 1987
Grant Date -
N/A
app pub date -
Mar 1, 1983
filing date -
Mar 1, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A digital voice communication apparatus having improved echo suppression includes a transmission gain detection circuit for detecting a near talker signal and a receiver gain detection circuit for detecting a far talker signal. An echo detecting circuit detects which of the near talker and far talker signals has a lesser value and suppresses the gain of the one detected to have the lesser value. A far talker suppressing circuit detects whether the most recent peak gain in this near talker signal is greater than a threshold and is greater than the gain of the far talker signal. If this condition exists the far talker signal is suppressed. A near talker signal suppressing circuit detects whether the most recent gain of the far talker signal is greater than a threshold and is greater than the gain of the near talker signal. If so, the gain of the near talker signal is suppressed.
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