Echo canceller

Details Echo canceller Echo canceller

1992-11-12

1994-04-19

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

379411, H04B 323

Patent

active

053053095

ABSTRACT:
An echo cancellor includes an echo replica generator which generates an echo replica signal based on a received signal, a subtractor which obtains a transmitting side output signal by subtracting the echo replica signal from a transmitting side input signal, a divergence detector which detects a divergence of the echo cancellor based on the transmitting side input signal and the echo replica signal and outputs a detection signal when the divergence is detected, and a resetting part which automatically resets the echo replica generator in response to the detection signal from the divergence detector.

REFERENCES:
patent: 3735055 (1973-05-01), Thomas
patent: 4064378 (1977-12-01), Kitayama et al.
patent: 4467146 (1984-08-01), Lassaux
patent: 4633046 (1986-12-01), Kitayama et al.
patent: 4679230 (1987-07-01), Lassaux et al.
patent: 4712235 (1987-12-01), Jones, Jr.
patent: 4757527 (1988-07-01), Beniston et al.
patent: 4998241 (1991-03-01), Brox et al.

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