Patent Document ID: 5381514
Application ID: 08101621

Base Claim:
1. A speech synthesizer comprising: first indication means for indicating the amplitude of a waveform by using a random number; second indication means for indicating the superposition period for waveforms by using a random number; waveform generating means for generating a waveform having an amplitude indicated by said first indication means; waveform superposition means for superposing and adding the waveform generated by said waveform generating means onto a waveform obtained by delaying the waveform, which is previously generated by said waveform generating means, by a superposition period indicated by said second indication means; and output means for outputting the waveform added by said waveform superposition means as unvoiced speech.

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Claim 2:
2. A speech synthesizer according to claim 1, further comprising means for multiplying an unvoiced speech waveform synthesized by said waveform superposition means by a coefficient in order to control the power of the unvoiced speech waveform synthesized by said waveform superposition means.