Echo canceling system

Details Echo canceling system Echo canceling system

2006-07-04

2006-07-04

Vu, Huy D. (Department: 2663)

Multiplex communications

Duplex

Transmit/receive interaction control

C379S406060

Reexamination Certificate

active

07072310

ABSTRACT:
An optimal echo canceling processing is provided regardless of a condition of a partner's system and even in the condition with large delay amount and large fluctuation amplitude of a network transmission. A speaker10inputs a voice via a microphone11.A voice signal of this voice is transmitted to a terminal14of a conversation partner via a VoIP application13and the internet30.Concurrently, the voice signal is inputted to an echo canceller100.The echo canceller100detects sound characteristics of an echo path in advance or dynamically, adjusts a filter coefficient for generating an echo canceling signal, and receives an adjustment by a user. The echo canceller100generates the echo canceling signal by processing the received voice signal based on the sound characteristics and the adjusting amount. The echo canceling signal is subtracted from a response signal containing an echo that has been re-inputted from a loudspeaker22of the partner via a microphone21.

REFERENCES:
patent: 4764955 (1988-08-01), Galand et al.
patent: 4935919 (1990-06-01), Hiraguchi
patent: 5313498 (1994-05-01), Sano
patent: 5400399 (1995-03-01), Umemoto et al.
patent: 5410595 (1995-04-01), Park et al.
patent: 62-107533 (1987-05-01), None
patent: 63-87027 (1988-04-01), None
patent: 1-319353 (1989-12-01), None
patent: 5-292174 (1993-11-01), None
patent: 5-313673 (1993-11-01), None
patent: 6-260972 (1994-09-01), None
patent: 7-240722 (1995-09-01), None
patent: 8-56218 (1996-02-01), None
patent: 9-116468 (1997-05-01), None
patent: 9-307609 (1997-11-01), None
patent: 11-8696 (1999-01-01), None
patent: 11-164389 (1999-06-01), None
patent: 11-187086 (1999-07-01), None
patent: 2000-3550 (2000-01-01), None
patent: 2000-115351 (2000-04-01), None
JPO Office Action dated Mar. 22, 2005.

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