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- Patents > 2009-10-08 > SECTION G PHYSICS > MUSICAL INSTRUMENTS; ACOUSTICS > SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION
APPARATUS, METHOD, AND COMPUTER PROGRAM PRODUCT FOR JUDGING SPEECH/NON-SPEECH
A spectrum calculating unit calculates, for each of the frames, a spectrum by performing a frequency analysis on an acoustic signal. An estimating unit estimates a noise spectrum. An energy calculating unit calculates an energy characteristic amount. An entropy calculating unit calculates a normalized spectral entropy value. A generating unit generates a characteristic vector based on the energy characteristic amounts and the normalized spectral entropy values that have been calculated for a plurality of frames. A likelihood calculating unit calculates a speech likelihood value of a target frame that corresponds to the characteristic vector. In a case where the speech likelihood value is larger than a threshold value, a judging unit judges that the target frame is a speech frame.
Filed on: 2008-09-22; Application Number: 12234976