| 摘要 |
PROBLEM TO BE SOLVED: To provide an encoding method for a sound signal which can separate the sound signal including sounds from multiple sound sources by the sound sources. SOLUTION: A timbre database wherein timbre patterns are registered is prepared. Unit sections are set for a time-series sound signal (S1), the signal is analyzed by the unit sections to generate phoneme data consisting of a frequency, an intensity value, section start time, and section end time (S2), and data whose intensity values do not reach a signal level are deleted (S3). Data having the same frequency and succeed in the time direction among the remaining phoneme data are integrated to generate connected phoneme data (S4). Envelope data and spectrum data are generated from the connected phoneme data and matched against envelope data and spectrum data of respective timbre patterns in the timbre database (S5, S6), a corresponding timbre group is determined according to the matching result (S7), and the ID of the timbre group is given to the connected phoneme data. |
