SOUND SOURCE SEPARATION DEVICE, SOUND SOURCE SEPARATION METHOD, AND SOUND SOURCE SEPARATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To shorten an output delay (delay between the occurrence of a mixture sound signal and outputting of separated signals separated and generated from the mixture sound signal) while securing a high sound source separation performance when performing sound source separation processing by an ICA method. SOLUTION: An execution period t2 of second Fourier transform processing for obtaining a second frequency domain signal S1 for use as an input signal of filter processing is made shorter than an execution period t1 of first Fourier transform processing for obtaining a first frequency domain signal S1 for use in learning computation of a separation matrix. In the case that the time length of the second time domain signal S1 is set shorter than that of a first time domain signal S0, matrix elements of a first separation matrix obtained by learning computation are aggregated by a plurality of groups, for setting a second separation matrix for use in filter processing. COPYRIGHT: (C)2008,JPO&INPIT