Speech synthesis system by rule using phonemes as systhesis unit

Details Speech synthesis system by rule using phonemes as systhesis unit Speech synthesis system by rule using phonemes as systhesis unit

1988-05-17

1990-01-23

Clark, David L.

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Loudspeaker operation

G10L 502

Patent

active

048963593

ABSTRACT:
A speech synthesizer that synthesizes speech by actuating a voice source and a filter which processes output of the voice source according to speech parameters in each successive short interval of time according to feature vectors which include formant frequencies, formant bandwidth, speech rate and so on. Each feature vector, or speech parameter is defined by two target points (r.sub.1, r.sub.2), and a value at each target point together with a connection curve between target points. A speech rate is defined by a speech rate curve which defines elongation or shortening of the speech rate, by start point (d.sub.1) of elongation (or shorteninng), end point (d.sub.2), and elongation ratio between d.sub.1 and d.sub.2. The ratios between the relative time of each speech parameter and absolute time are preliminarily calculated according to the speech rate table in each predetermined short interval.

REFERENCES:
patent: 4278838 (1981-07-01), Antonou
patent: 4685135 (1987-08-01), Lin et al.
patent: 4692941 (1987-09-01), Jacks et al.
"Real-Time Text-to-Speech Using Custom LSI and Standard Microcomputers", James L. Caldwell, 1980 IEEE, pp. 43-45.

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