Signal extraction program signal extraction system, and signal extraction method

摘要

PPROBLEM TO BE SOLVED: To provide a signal extraction system for easily and accurately performing signal extraction processing of taking out only a specific signal component from various input signals such as a voice signal. PSOLUTION: A band signal matrix of each band i after division of a mixed signal into N bands in a frequency domain is subjected to first independent component analysis processing to output M separated signals 1SBi,j/SBfor each band. An amplitude envelope signal matrix after band division is subjected to second independent component analysis processing to output M separated signals 1'SBi,j/SBfor each band. On the basis of signals 1'SBi,j/SB, a radial basis function neural network constructed on the basis of a plurality of reference sound signal patterns similar to a plurality of sound signal patterns included in the mixed signal is referred to determine an output channel corresponding to a sound signal pattern to be taken out and a relative value of an amplitude value. Thus, a final extraction signal is obtained on the basis of signals 1'SBi,j/SBin an extraction signal output part 17. PCOPYRIGHT: (C)2004,JPO