Acoustic signal feature extraction method, extraction apparatus, extraction program, a recording medium recording the program, and an acoustic signal search method using the feature, the search device, a search program, and recording medium storing the program

摘要

PPROBLEM TO BE SOLVED: To provide a sound signal retrieval device capable of accurately retrieving a sound signal at high speed in a flexible way, even when frequency of each sound signal is fluctuating. PSOLUTION: In the sound signal retrieval device 1, a base frequency detection section 11 extracts a predetermined base feature part for each time interval, from each time frequency spectrogram of a reference signal and an accumulation signal, and frequency of an extracted predetermined base feature part is made into base frequency of each of the reference signal and the accumulation signal. A feature extraction section 12 extracts a reference feature amount in a whole signal of the reference signal based on a power spectrum value of the frequency which is uniquely defined with the base frequency as a base. A similarity calculation section 13 extracts a feature amount of the accumulation signal for each time interval, based on the extracted reference feature amount, and calculates an interval feature amount of the extracted accumulation signal for each interval, and a similarity degree is calculated based on the calculated interval feature amount and the reference feature amount. PCOPYRIGHT: (C)2008,JPO&INPIT