| 摘要 |
PURPOSE:To obtain a composite voice being natural and having a high quality by varying a sampling frequency of a D/A converter, converting a parameter given to a voice meatus filter so as to conform with this sampling frequency and synthesizing a voice whose pitch is different. CONSTITUTION:A residual waveform 1 obtained from voice data is used as it is at the time of synthesis by using a phoneme, etc., as a unit, and in a parameter converting part 5, a voice meatus characteristic parameter 2 is converted so that a frequency characteristic of a synthesizing filter 4 in the case a sampling frequency is varied becomes equivalent to the original frequency characteristic. Subsequently, a D/A converting part 6 brings an output from the synthesizing filter 4 to D/A conversion, while varying dynamically the sampling frequency by a value given from a pitch parameter 3, and synthesizes a voice whose pitch is different. In such a way, a voice of a high quality can be synthesized. |
