ANALYZING METHOD FOR OBSERVATION DATA, ESPECIALLY, SOUND SIGNAL HAVING MIXED SOUNDS FROM A PLURALITY OF SOUND SOURCES

摘要

PROBLEM TO BE SOLVED: To provide a framework that enables a wide-area time structure and a frequency structure to be estimated at the same time.;SOLUTION: An observation spectrum of a sound signal having mixed sounds from a plurality of sound sources is modeled with a superposition object model obtained by superposing a plurality of sound object models, the respective sound object models are represented with a model function having two variables of a frequency (x) and a time (t), and model parameters of the model function are optimized to estimate characteristics of the observation spectrum. The respective sound object models correspond to one harmonic structure. The model function includes a harmonic structure function including the frequency (x) as a variable and an envelope function including the time (t) as a variable.;COPYRIGHT: (C)2006,JPO&NCIPI