Patent ID: 7860714

Claim:
A detection system of a segment including a specific sound signal comprising: a reference signal spectrogram division portion which divides a reference signal spectrogram that is a time-frequency spectrogram of the reference signal into spectrograms of small-regions that are small-region reference signal spectrograms; a small-region reference signal spectrogram coding portion which encodes the small-region reference signal spectrogram to a reference signal small-region code; a small-region stored signal spectrogram coding portion which encodes a small-region stored signal spectrogram that is a spectrogram of a small-region in a stored signal spectrogram which is a time-frequency spectrogram of the stored signal, and obtain a stored signal small-region code; a similar small-region spectrogram detection portion which detects a small-region stored signal spectrogram similar to the small-region reference signal spectrograms respectively based on a degree of similarity of a code from the small-region stored signal spectrogram; and a degree of segment similarity calculation portion, by using a degree of small-region similarity between the small-region reference signal spectrogram and the small-region stored signal spectrogram which is similar to the small-region reference signal spectrogram and which is detected by the similar small-region spectrogram detection portion and calculates a degree of similarity between the segment of the stored signal including the small-region stored signal spectrogram which is similar to the small-region reference signal spectrogram and the reference signal.