MULTI-CHANNEL ECHO ERASURE METHOD, MULTI-CHANNEL ECHO ERASURE DEVICE, AND PROGRAM OF THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a multi-channel echo erasure technology which can erase an echo swiftly without being affected by variance in an echo path and cross-correlation between a double-talk and a receiving signal channel.

SOLUTION: A residual echo erasure part or a second residual echo erasure part estimates an input-output transfer characteristic by using a power spectrum of a pseudo echo signal and a cross spectrum between a second sound collection signal or a third sound collection signal and the pseudo echo signal, and predicts a residual echo component included in the second sound collection signal or the third sound collection signal from the pseudo echo signal and the input-output transfer characteristic.

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