| 摘要 |
PROBLEM TO BE SOLVED: To perform highly accurate separation processing in consideration of a delay amount for mixed sound signals having various delay amounts. SOLUTION: Observation spectrograms generated by converting an input sound signal into a time-frequency domain is interpreted as observation signals subjected to convolution mixtures in the time-frequency domain and an independent component analysis solving the convolutive mixtures is performed to generate signal separated results. Alternatively, modulation spectrograms generated by short-time Fourier transform (STFT) is interpreted as instantaneous mixting and an independent component analysis solving the instantaneous mixting is performed to generate signal separated results. Therefore, highly accurate separation processing is performed by taking into account a delay amount for mixed sound signals having various delay amounts such as direct waves and reflected waves. COPYRIGHT: (C)2009,JPO&INPIT
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