Acoustic echo cancellation

Details Acoustic echo cancellation Acoustic echo cancellation

2000-05-18

2010-02-09

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Dereverberators

C381S093000, C381S071110, C455S570000, C379S406010, C379S406090

Reexamination Certificate

active

07660425

ABSTRACT:
A multiple channel steered spatialized signal is generated from a signal input modified according to respective spatialization gain functions to generate a plurality of audio channels. An echo cancellation signal is applied to a return path using a combined spatialization and echo path estimate. The estimate is derived from the gain functions applied to the respective channels. When the gain functions applied in the respective channels are changed, for instance to represent a different apparent position of the sound source, a new estimate of the echo paths is generated, based on a previous estimate of the echo path and on the new gain functions.

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Office Action, Canadian Patent Office, Application No. 2,373,114, Dec. 9, 2005, pp. 1-2.

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