| 摘要 |
PROBLEM TO BE SOLVED: To provide a sound input device capable of removing diffusive noise with a slight increase in calculation quantity as compared with SBE applied to a general frequency domain ICA. SOLUTION: The sound input device detects a sound including a target sound and a non-target sound by a plurality of microphones 10-1 to 10-n to obtain a plurality of sound signals including target sound signals and non-target sound signals and implements an independent component analyzing method of acquiring, by repetitive learning, a filter separating one target sound signal from the sound signals. A sound frequency band is divided into a plurality of frequency division bands at a band division stage 30, discrimination levels for evaluating target sound separation performance of the filter obtained by the learning are calculated by the frequency division bands at an evaluation stage 50, and a frequency division band for learning calculation is determined at a determination stage 60 among the frequency division bands based upon the discrimination levels. COPYRIGHT: (C)2006,JPO&NCIPI
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