Method and arrangement for echo compensation

Details Method and arrangement for echo compensation Method and arrangement for echo compensation

1997-09-26

1999-09-14

Isen, Forester W.

Telephonic communications

Echo cancellation or suppression

379410, 379411, 370289, H04M 908

Patent

active

059534109

ABSTRACT:
A method for echo compensation is provided in which filter coefficients are obtained by correlation of a transmission signal and an error signal, the coefficients determining a correction signal that is subtracted from the sum signal formed from the speech signal and the echo signal so that the disturbing signal portion is eliminated. Auxiliary coefficients are determined in the same way and the absolute values of the auxiliary coefficients control the product of the transmission signal and the error signal and thus determine the time curve of the filter coefficients.

REFERENCES:
patent: 4688245 (1987-08-01), Schenk
patent: 4937813 (1990-06-01), Schenk
patent: 4956838 (1990-09-01), Gilloire et al.
patent: 4972467 (1990-11-01), Nakagawa et al.
patent: 5193112 (1993-03-01), Sano
patent: 5230012 (1993-07-01), Schenk
patent: 5263020 (1993-11-01), Yatsuzuka et al.
patent: 5278900 (1994-01-01), Van Gerwen et al.
patent: 5315585 (1994-05-01), Lizuka et al.
"Echokompensation Unter Verwendung Rekursiver Filter", Kleinheubach Bericht 26 1983, pp. 427-435.

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