SOUND SOURCE SEPARATION SYSTEM, SOUND SOURCE SEPARATION METHOD, AND ACOUSTIC SIGNAL ACQUISITION DEVICE
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United States of America Patent
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app pub date -
Jun 1, 2012
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Dec 17, 2004
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Abstract
A sound source separation system separates a target sound and a disturbance sound coming from an arbitrary direction other than the direction the target sound comes from. The system includes different-directional-signal-group generators and a sensitive region formation unit. The generators each generate two or more combinations of spectra of signals each of which has a different directivity, using received sound signals of microphones. The sensitive region formation unit determines, for each frequency band, whether or not a relationship between powers of the spectra in each combination simultaneously satisfies conditions each defined for each combination, using two or more combinations of the spectra of the signals generated by the respective different-directional-signal-group generators, and performs multidimensional band selection of assigning power of a spectrum selected beforehand to a spectrum of the target sound to be separated, for a frequency band where the conditions are simultaneously satisfied.
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