| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device and a method for detecting a musical piece structure that can properly detect the structure of a musical piece including a repetitive part with simple constitution. <P>SOLUTION: Partial musical piece data consisting of a specified number of successive chords are generated from positions of respective chords in chord progression musical piece data showing time-series variation of chords of a musical piece, the respective partial musical piece data and chord progression musical piece data are compared with each other as to root change quantities of the chords in the chord progression musical piece data at the time of chord changes from their position and properties of the chords after the changes to calculate similarities by the chords; and the positions of the chords in the chord progression musical piece data where the similarities calculated by the partial musical piece data reach peak values larger than a specified value are detected according to the similarities, frequencies at which the similarities reaches the peak values larger than the specified value are calculated as to the partial musical piece data by the positions of the chords in the chord progression musical piece data, and a detection output showing the musical piece structure is generated according to the calculated frequencies by the positions of the chords. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
