| 摘要 |
PROBLEM TO BE SOLVED: To effectively suppress an undesired sound even when a desired sound and the undesired sound are similar to each other. SOLUTION: A first sound collector 71 and a second sound collector 72 are separated from each other. A sound source separation unit 20 extracts a desired sound frequency FA at which the desired sound is superior and an undesired sound frequency FB at which the undesired sound is superior among K frequencies for each frame from a sound signal S1 generated by the first sound collector 71 and a sound signal S2 generated by the second sound collector 72. An undesired sound estimation unit 32 generates an undesired sound spectrum Q where intensities at undesired sound frequencies FB of a plurality of frames are set according to intensities of components of the undesired sound frequencies FB. An undesired sound suppression unit 34 subtracts the undesired sound spectrum Q from a desired sound spectrum X including respective components of desired sound frequencies FA. COPYRIGHT: (C)2009,JPO&INPIT
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