A method to reduce training time of an acoustic echo...

Details A method to reduce training time of an acoustic echo... A method to reduce training time of an acoustic echo...

H - Electricity

04

M

H04M 9/08 (2006.01) H04B 3/23 (2006.01) H04M 3/56 (2006.01)

Patent

CA 2539798

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.

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