Patent ID: 7251601
Filing Date: 2007-07-31
Classification: G10L

Abstract:
1. A speech synthesis method comprising: storing a plurality of formant parameter groups each including a number of formant parameters in a storage in units of a synthesis unit, the formant parameters representing a formant frequency, a formant phase and a windowing function; selecting predetermined formant parameters from the formant parameters stored in the storage according to a phoneme symbol string; generating a plurality of sine waves based on formant frequencies and formant phases corresponding to the formant parameters selected; multiplying the sine waves by the windowing functions corresponding to the selected formant parameters, respectively, to generate a plurality of formant waveforms each having a characteristic of one formant; adding the formant waveforms to generate a pitch waveform having characteristics of a plurality of formants; and superposing pitch waveforms each corresponding to the pitch waveform according to a pitch period to generate a speech signal.