| 摘要 |
PURPOSE:To generate a more natural synthesized voice by multiplying a synthesized voice signal by the output of a fluctuation time-series memory through an integrator and adding amplitude fluctuations to the synthesized voice. CONSTITUTION:The fluctuation time series memory 2a is stored with amplitude fluctuations obtained from a natural voice by an amplitude fluctuation extracting means 1 in advance. For example, a vowel which is generated steadily is used as the natural voice and the amplitude fluctuation extracting means 1 finds a maximum amplitude value in each pitch period of the natural voice and divide maximum values by a mean value for normalization to obtain amplitude fluctuations. The voice signal outputted by a synthesizing filter 4 is superposed upon the amplitude fluctuations from a fluctuation generating circuit 2 to obtain a voice signal given the amplitude fluctuations. Consequently, the amplitude fluctuations in the natural voice can be reflected faithfully and the more natural synthesized voice can be obtained. |
