UNIT RHYTHM EXTRACTION METHOD FROM MUSICAL ACOUSTIC SIGNAL, MUSICAL PIECE STRUCTURE ESTIMATION METHOD USING THIS METHOD, AND REPLACING METHOD OF PERCUSSION INSTRUMENT PATTERN IN MUSICAL ACOUSTIC SIGNAL

摘要

PROBLEM TO BE SOLVED: To extract a percussion instrument pattern of a bar unit from a musical acoustic signal.;SOLUTION: A method for creating a map of a beat pattern is provided, by extracting a plurality of kinds of percussion patterns of the bar unit, which is included in the musical acoustic signal, and by estimating their performance positions at the same time. This method is utilized for automatic music genre classification, music information retrieval, and music processing such as replacing the percussion instrument pattern. Optimal segmentation to a bar by using One-pass DP (Dynamic Programming) method, and clustering of the percussion patterns by k-means clustering method are repeatedly performed, and the percussion patterns of the optimal number estimated by an information amount criterion are extracted, and as a result, the map for indicating a musical piece structure by using those is obtained.;COPYRIGHT: (C)2010,JPO&INPIT