Patent ID: 6021388
Filing Date: 2000-02-01
Classification: G10L

Abstract:
A speech synthesis apparatus for outputting synthesized speech on the basis of a parameter sequence of a speech waveform, comprising:pitch waveform generation means for generating pitch waveforms on the basis of waveform and pitch parameters which are included in the parameter sequence used in speech synthesis and represent a power spectrum envelope of speech in the frequency domain, said pitch waveform generation means generating the pitch waveform by,a) calculating the product sum of the waveform parameters and an inverse matrix of a matrix representing a cosine series expansion,b) obtaining sample values of the speech envelope, which correspond to integer multiples of the pitch frequency of synthesized speech, by calculating the product sum of said calculated product sum and cosine function, andc) generating pitch waveform based on the obtained sample value; andspeech waveform generatiom means for generating a speech waveform by connecting the pitch waveforms generated by said pitch waveform generation means.