Signal amplifier system with improved echo cancellation

Details Signal amplifier system with improved echo cancellation Signal amplifier system with improved echo cancellation

1997-03-21

1998-05-05

Harvey, Minsun Oh

Electrical audio signal processing systems and devices

Feedback suppression

381 83, 381 66, 381 941, H04B 1500

Patent

active

057487510

ABSTRACT:
In a signal amplifier system, a microphone (2) is connected to an echo canceller (16) via a decorrelator (6). The output signal of the echo canceller (16) is amplified by an amplifier (14) and fed to a loudspeaker (18). The echo canceller (16) is included to avoid instability caused by undesired feedback of the signal coming from the loudspeaker (18) through a feedback path (11). To improve the stabilizing effect of the echo canceller (16), the decorrelator (6) is included for decorrelating the signal coming from the microphone (2) and the signal transmitted by the loudspeaker (18).

REFERENCES:
patent: 4039753 (1977-08-01), Balogh et al.
patent: 4449237 (1984-05-01), Stepp et al.
patent: 4903247 (1990-02-01), Van Gerwen et al.
patent: 4905290 (1990-02-01), Yaoita
patent: 5091952 (1992-02-01), Williamson
patent: 5259033 (1993-11-01), Goodings et al.
patent: 5402496 (1995-03-01), Soli

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