| 摘要 |
PROBLEM TO BE SOLVED: To always perform stable echo cancellation without sound quality deterioration during multichannel reproduction, and without depending on either double talk time or single talk time. SOLUTION: A multichannel echo canceler according to the present invention includes an echo cancellation section which: receives loudspeaker input signals (sp1 , sp2) including a second acoustic signal to be respectively input to a plurality of loudspeakers (10, 20) provided in a first location and detection signals (m1, m2) detected by a plurality of microphones (11, 21) provided in the first location; separates a first acoustic signal and the second acoustic signal, which are included in the detection signals (m1, m2) by performing signal processing based on an independent component analysis; and cancels as an echo the second acoustic signal, which is included in the detection signals (m1, m2) by outputting only the separated first acoustic signal to a plurality of loudspeakers (30, 40) provided in a second location. COPYRIGHT: (C)2008,JPO&INPIT
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