| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a multichannel echo cancellation device which can reduce an arithmetic operation amount in multichannel echo cancellation processing. <P>SOLUTION: In a multichannel echo cancellation device 20 of the present invention, a received talk signal vector conversion unit 100 converts a received talk signal into a frequency domain. An echo replica generation unit 220 generates a spatially thinned-out echo replica for a microphone selected on the basis of a spatial sampling interval. An echo replica spatial interpolation unit 300 performs spatial interpolation from the spatially thinned-out echo replica to generate an echo replica. An inverse FFT unit 400 converts the echo replica into a time domain. An echo cancellation unit 510 generates an error signal from a transmitted talk signal and the echo replica. An FFT unit 600 converts the error signal into the frequency domain. The echo replica generation unit 220 calculates a correction amount for the microphone selected on the basis of the spatial sampling interval to update a filter coefficient. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
