G - Physics
10
L
354/47
G10L 1/08 (1980.01)
Patent
CA 1170370
- 46 - ABSTRACT OF THE DISCLOSURE A sound synthesizer in which pulses of a period indicated by a fundamental period parameter are produced by a fundamental period sound source, the output from the fundamental period sound source or the output from a noise source is selected depending on whether a sound to be synthesized is a voiced or unvoiced sound, and the selected pulses are applied to a sound synthesis filter section to synthesize the sound. The sound synthesis filter section is composed of second-order filter means which serves as a second-order filter having the zero on a unit circle in a complex plane, means for cascade- operating second-order filter means of different coef- ficients, and feedback means for feeding back the output from the synthesis filter section to the input side thereof through two kinds of such cascade-operating means, and coefficients of the second-order filters are controlled by control parameters.
430397
Itakura Fumitada
Sugamura Noboru
Kirby Eades Gale Baker
Nippon Telegraph & Telephone Public Corporation
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