Patent ID: 7214868
Filing Date: 2007-05-08
Classification: G10H,G10L,G11B

Abstract:
1. An acoustic signal processing apparatus for detecting a featuring portion in acoustic signals, comprising: amplitude calculating means for calculating short-term amplitudes, at an interval of a preset time length in the acoustic signals; candidate domain extraction means for extracting candidate domains of said featuring portion based on said short-term amplitudes; feature extraction means for extracting sound quality featuring quantities, quantifying the sound quality, at an interval of said preset time length in the acoustic signals; and candidate domain evaluating means for evaluating, based on said short-term amplitudes and said sound quality featuring quantities, whether or not said candidate domain is said featuring portion, wherein said sound quality featuring quantities are selected from the group consisting of the short-term power spectrum coefficients of said acoustic signals, short-term cepstrum coefficients of said acoustic signals, and coefficients obtained on Kiarhunen-Loeve transforming said short-term power spectrum coefficients, and wherein said candidate domain evaluating means assigns at least a maximum value of the sound quality featuring quantities to a feature vector and uses the feature vector for candidate domain evaluation.