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1. (WO2017155098) SOUND SIGNAL PROCESSING METHOD AND SOUND SIGNAL PROCESSING DEVICE

Pub. No.:    WO/2017/155098    International Application No.:    PCT/JP2017/009745
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Mar 11 00:59:59 CET 2017
IPC: G10G 3/04
Applicants: YAMAHA CORPORATION
ヤマハ株式会社
Inventors: MAEZAWA Akira
前澤 陽
Title: SOUND SIGNAL PROCESSING METHOD AND SOUND SIGNAL PROCESSING DEVICE
Abstract:
A sound signal processing method comprises: a step (S2) for acquiring a unit time length of an input sound signal; a step (S3) for calculating a timbre feature amount from the input sound signal; a step (S4) for, when the time lengths of one beat and one bar are assumed with reference to the unit time length of the input sound signal with respect to the timbre feature amount, calculating an index indicating the validity of the assumed time lengths; and a step (S5) for, on the basis of the index, estimating the time lengths of one beat and one bar based on the unit time length.