| 摘要 |
PROBLEM TO BE SOLVED: To provide a speech analysis and synthesis device capable of avoiding synthesis of a speech waveform that gives a feeling of phase shifting. SOLUTION: An FFT (Fast Fourier Transform) part 25 performs FFT on master speech data of one frame, of which the high-frequency component has been removed and to which a pitch shift has been applied. A time scaling part 26 calculates a frequency amplitude, a phase, a phase difference between the present frame and the frame immediately preceding the present frame, and a phase difference obtained by developing the above phase difference, for each channel of which the frequency component has been obtained by the FFT, and detects a channel B as a standard by paying attention to a peak of the frequency amplitude. With the channel B used as a standard, the time scaling part 26 calculates the phase of each channel in the synthesized speech using these calculation results. An IFFT (Inverse FFT) part 27 operates the frequency component according to the phase, performs IFFT on the frequency component after the operation, and synthesizes the synthesis speech data of one frame. COPYRIGHT: (C)2010,JPO&INPIT |
