Method and apparatus for erasing acoustic echo

Details Method and apparatus for erasing acoustic echo Method and apparatus for erasing acoustic echo

1997-03-24

1999-11-16

Harvey, Minsun Oh

Electrical audio signal processing systems and devices

Dereverberators

379406, 379410, H04B 320

Patent

active

059871431

ABSTRACT:
An acoustic echo erasing apparatus which generates a pseudo-echo component from an audio reception signal (a vector x.sub.1) using an adaptive filter, and removes the pseudo-echo component from an audio transmission signal (a vector y). The apparatus extracts a feedback component depending only on the audio reception signal from the audio transmission signal, and passes the audio reception signal through the adaptive filter to generate the pseudo-echo component while setting a transfer characteristic of the adaptive filter in accordance with the feedback component.

REFERENCES:
patent: 5553014 (1996-09-01), De Leon
Hada et al. "Studies on Echo Canceller Having Duo-Filter Using ES Projection Algorithm", Transactions of Conference held by Institute of Acoustic Engineers of Japan, Mar. 1995, pp. 595-596.

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