Telephonic communications – Echo cancellation or suppression
Patent
1996-06-27
1998-11-17
Wolinsky, Scott
Telephonic communications
Echo cancellation or suppression
379390, 379420, H04M 908
Patent
active
058387870
ABSTRACT:
A telephone terminal having handsfree functionality is provided with an audio system which controls echo return loss while permitting virtual full-duplex operation. The system, which has a variolosser in both the transmit and receive path and an acoustic echo canceller, also has a complementary variolosser which introduces additional echo return loss only when required and as a function of the state of the system.
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Ding Heping
McClennon Scott
Northern Telecom Limited
Wolinsky Scott
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