Method for adaptive control of multichannel acoustic echo cancellation system and device therefor
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United States of America Patent
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May 9, 2006
Grant Date -
Jul 8, 2004
app pub date -
May 14, 2002
filing date -
May 16, 2001
priority date (Note) -
Expired
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Abstract
A method for adaptive control of a multi-channel echo cancellation system including N loudspeakers, where N is an integer greater than or equal to 2, and M microphones, where M is an integer greater than or equal to 1. The system includes N.times.M identification filters with variable coefficients, the identification filters being used to estimate acoustic coupling between the loudspeakers and the microphones as a function of a variable coefficients adaptive step. The variable coefficients adaptive step depends on whether or not there is a signal present on the loudspeakers. The method is applicable to hands-off operation of communication tools.
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