Tempo analysis device and tempo analysis method
AssigneeSony Corporation
InventorsGoro Shiraishi, Chie Sekine, Kumiko Masuda, Kuniharu Mori
Life of this patent
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Abstract
A tempo analyzer to analyze the tempo of sound such as a musical composition or the like is provided in which a controller (9) takes, based on level information on a sound signal from an analysis data extraction unit (62), a frame which is a predetermined unit-time interval as a unit of process, detects positions of peaks of the level of the sound signal (apex of the change in level) higher than a predetermined level to find a time interval (peak-to-peak interval) between the peak positions in the frame, and determines a peak-to-peak time interval having occurred frequently as a tempo.
Claims20
A tempo analyzing apparatus comprising:
- a peak detecting means for detecting positions of a plurality of ones, higher than a predetermined threshold, of peaks of change in level of an input sound signal;
- a time interval detecting means for detecting a time interval between the peak positions detected by the peak detecting means in a predetermined unit-time interval;
- and
- an identifying means for identifying the tempo of sound to be reproduced with the sound signal on the basis of a frequently occurring one of the time intervals detected by the time interval detecting means.
A tempo analyzing method comprising the steps of:
- detecting positions of a plurality of ones, higher than a predetermined threshold, of peaks of change in level of an input sound signal;
- detecting a time interval between the detected peak positions in a predetermined unit-time interval;
- and
- identifying the tempo of sound to be reproduced with the sound signal on the basis of one, having occurred at a high frequency, of the detected time intervals.
Dependencies are inferred from the claim text.