| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal extracting method, a signal extracting device and a signal extraction program for estimating a separation filter with a length sufficient for separation while holding the assumption of the independence a signal in each band by adopting a configuration for applying subband analysis combination to a plurality of mixed signals to calculate an output signal corresponding to the original signal, and to provide a recording medium recorded with the program. SOLUTION: This signal extracting method is for separatingly extracting the original signal from the plurality of mixed signals observed through a path having a long impulse response on the basis of its independence. By using the signal extracting method, the signal extracting device, the signal extraction program and the recording medium recorded with the program, the plurality of mixed signals are inputted to a subband analyzing part 51, the mixed signals are respectively subjected to a subband analysis into N (N is positive integer) bands, the subband-analyzed signal of each band is inputted to a time domain BSS part 53 of a corresponding band to be subjected to sound source separation in each band, and the sound source-separated signal is inputted to a subband combining part 55 to calculate an output signal corresponding to the original signal. COPYRIGHT: (C)2003,JPO
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