| 摘要 |
<p>The invention concerns a method for adaptive control of multichannel acoustic echo cancellation system comprising N speakers HPi (i = 1, 2, , N), N being an integer not less than 2, and M microphones MCj (j = 1, 2, , M), M being an integer not less than 1. The system comprises NxM identification filters Fij with variable coefficients, the identification filter Fij enabling to estimate the acoustic coupling between the speaker HPj and the microphone MCj based on a pitch ν adapting the variable coefficients. The pitch ν adapting the variable coefficients is based on the presence or absence of signal in the speakers HPk (k≠i). The invention is applicable to the hands-free use of communication tools.</p> |
