Patent ID: 6553343
Filing Date: 2003-04-22
Classification: G10L

Abstract:
A speech synthesis method comprising:generating a representative speech pitch wave from a reference speech signal by subjecting the reference speech signal to one of Fourier transform and Fourier series expansion to produce a discrete spectrum, interpolating the discrete spectrum to generate a consecutive spectrum, and subjecting the consecutive spectrum to inverse Fourier transform; generating a linear prediction coefficient by subjecting the reference speech signal to a linear prediction analysis; subjecting the representative speech pitch wave to inverse-filtering based on the linear prediction coefficient to produce a residual pitch wave; storing information on the residual pitch wave and the linear prediction coefficient in a storage; generating a voiced speech source signal based on the residual pitch wave from the storage; generating an unvoiced speech source signal; and driving a vocal tract filter having the linear prediction coefficient by the voiced speech source signal or the unvoiced speech source signal to generate a synthesis speech.