| 摘要 |
PROBLEM TO BE SOLVED: To provide a frequency analysis method with which a sound signal obtained from the performance sound recording or the like can be correctly reproduced, and an encoding method of the sound signal. SOLUTION: A time series signal is extracted as a section signal (S3), correlation between the section signal and two ore more standard frequencies is determined and stored (S4), then the greatest correlation value in the correlation array is selected, and is added to the intensity value of the corresponding standard frequency in the intensity array (S6). Then, by subtracting the containing signal generated by the product of the selected maximum correlation value and the corresponding standard periodic function from the section signal, it is made to a new section signal (S7), a step S4 is performed, and is updated as a correlation value of the standard frequency (S8). The intensity array obtained by repeating and performing steps S6-S8 is determined as the intensity value for each of all the standard frequencies in the unit section. |
