| 摘要 |
A conversion rule and a rule selection parameter are stored. The conversion rule converts a spectral parameter of a source speaker to a spectral parameter of a target speaker. The rule selection parameter represents the spectral parameter of the source speaker. A first conversion rule of start timing and a second conversion rule of end timing in a speech unit of the source speaker are selected by the spectral parameter of the start timing and the end timing. An interpolation coefficient corresponding to the spectral parameter of each timing in the speech unit is calculated by the first conversion rule and the second conversion rule. A third conversion rule corresponding to the spectral parameter of each timing in the speech unit is calculated by interpolating the first conversion rule and the second conversion rule with the interpolation coefficient. The spectral parameter of each timing is converted to a spectral parameter of the target speaker by the third conversion rule. A spectral acquired from the spectral parameter of the target speaker is compensated by a spectral compensation quantity. A speech waveform is generated from the compensated spectral.
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