Method to reduce training time of an acoustic echo canceller...

Details Method to reduce training time of an acoustic echo canceller... Method to reduce training time of an acoustic echo canceller...

2006-05-05

2010-11-09

Tsang, Fan (Department: 2614)

Telephonic communications

Echo cancellation or suppression

Using digital signal processing

C379S406110, C379S286000, C379S290000

Reexamination Certificate

active

07831036

ABSTRACT:
A method is set forth for reducing the total acoustic echo cancellation convergence time for all look directions in a microphone array based full-duplex system. The method is based on capturing the loudspeaker signal due to the first far-end speech bursts when the conferencing system is first used, as well as the corresponding loudspeaker feedback signals in the individual microphones. The captured signals are then used for consecutive adaptation of the acoustic echo canceller on all echo paths corresponding to all look directions of the beamformer, thereby training the AEC. This training process can be executed concurrently with normal phone operation, for example, as a background process that utilizes available processing cycles.

REFERENCES:
patent: 5428604 (1995-06-01), Fuda
patent: 6049607 (2000-04-01), Marash et al.
patent: 2002/0015500 (2002-02-01), Belt et al.
patent: 2004/0120511 (2004-06-01), Beaucoup et al.
patent: 2413217 (2004-05-01), None

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