Echo canceling method and apparatus in a communication device

Details Echo canceling method and apparatus in a communication device Echo canceling method and apparatus in a communication device

1995-12-07

1999-08-03

Eisenzopf, Reinhard J.

Telephonic communications

Subscriber line or transmission line interface

Network interface device

379411, H04M 100

Patent

active

059334940

ABSTRACT:
A bidirectional communication device for transmitting and receiving communications signals in a system which presents a transmission path for conducting a communications signal from the device, a reception path for conducting a communications signal to the device, and an echo path which conducts echo signals from the transmission path to the reception path, the device having an echo canceler connected between the transmission path and the reception path for minimizing echo signals in the transmission path, the echo canceler comprising an adaptive filter for filtering the communications signals from the device according to a filter characteristic having a plurality of filter coefficients, wherein a first group of the coefficients, constituting less than all of the coefficients, has finite filter coefficient values and the remaining ones of the plurality of coefficients have values of zero.

REFERENCES:
patent: 3535473 (1970-10-01), Flanagan et al.
patent: 3735055 (1973-05-01), Thomas
patent: 3860768 (1975-01-01), Wehrmann
patent: 4582963 (1986-04-01), Danstrom
patent: 4805215 (1989-02-01), Miller
patent: 4823382 (1989-04-01), Martinez
patent: 5050160 (1991-09-01), Fuda
patent: 5295136 (1994-03-01), Ashley et al.
patent: 5307405 (1994-04-01), Sih
patent: 5343522 (1994-08-01), Yatrou et al.
patent: 5381474 (1995-01-01), Lahdemaki et al.
patent: 5410595 (1995-04-01), Park et al.
patent: 5475731 (1995-12-01), Rasmusson
patent: 5559881 (1996-09-01), Sih

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