Patent ID: 9002711
Filing Date: 2015-04-07
Classification: G10L

Abstract:
1. A speech synthesis apparatus comprising: a selecting unit configured to select speaker's parameters, of a plurality of speakers, one by one for respective speakers and obtain a plurality of speakers' parameters, the speaker's parameters being prepared for respective pitch waveforms corresponding to speaker's speech sounds, the speaker's parameters including formant frequencies, formant phases, formant powers, and window functions concerning respective formants that are contained in the respective pitch waveforms; a mapping unit configured to use a cost function to assess a weighted sum of a difference between the formant frequencies and a difference between the formant powers, to determine formants of the plurality of speakers' parameters that correspond to each other; a generating unit configured to generate an interpolated speaker's parameter by interpolating, in accordance with desired interpolation ratios, the formant frequencies, formant phases, formant powers, and window functions of the formants of the plurality of speakers' parameters that correspond to each other; and a synthesizing unit configured to synthesize a pitch waveform corresponding to interpolated speaker's speech sounds based on the interpolation ratios using the interpolated speaker's parameter.