Telephonic communications – Repeater – With signal conversion
Patent
1983-03-01
1987-03-24
Rubinson, Gene Z.
Telephonic communications
Repeater
With signal conversion
379410, H04B 320
Patent
active
046527036
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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Jayapalan Jay P.
Lu Chun C.
Miller William J.
Stephenson Jack E.
Miller Jerry A.
Newton William A.
Racal Data Communications Inc.
Rubinson Gene Z.
Vaas R.
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