Patent ID: 8271284
Filing Date: 2012-09-18
Classification: G10L

Abstract:
1. A speech synthesis device, which includes a storage unit which stores original speech waveforms that have been previously acquired, for generating synthesized speech corresponding to an input text sentence based on an original speech waveform stored in said storage unit, said speech synthesis device comprising: a conversion ratio calculation unit that calculates a conversion ratio of a pitch cycle of a pitch waveform which is obtained from said storage unit and which constitutes an original speech waveform for generating the synthesized speech to a pitch cycle of the synthesized speech obtained by analyzing the input text sentence; a fluctuation component suppression unit that suppresses a fluctuation component of a pitch cycle of a pitch waveform of the original speech waveform, the fluctuation component being reflected in the conversion ratio calculated by said conversion ratio calculation unit; a synthesized speech pitch cycle correction unit that corrects the pitch cycle of the synthesized speech based on the pitch cycle of the pitch waveform of the original speech waveform and the conversion ratio in which the fluctuation component is suppressed by said fluctuation component suppression unit; and a pitch waveform connection unit that connects, at the pitch cycle of the synthesized speech corrected by said synthesized speech pitch cycle correction unit, the pitch waveform of the original speech waveform obtained from said storage unit.