Detecting acoustic echoes using microphone arrays

Details Detecting acoustic echoes using microphone arrays Detecting acoustic echoes using microphone arrays

2004-10-21

2009-12-08

Mei, Xu (Department: 2614)

Electrical audio signal processing systems and devices

Directive circuits for microphones

C381S066000

Reexamination Certificate

active

07630503

ABSTRACT:
A method is provided for discriminating between the case of a single talker with an acoustic reflection and the case of two talkers, regardless of their power levels. The method is implemented in real time by performing a cross-correlation between pairs of average power signals originating from pairs of beamformers. A detection decision is then made based on the value of the cross correlation and its lag.

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