Formant shift-compensated sound synthesizer and method of operat

Details Formant shift-compensated sound synthesizer and method of operat Formant shift-compensated sound synthesizer and method of operat

1998-03-02

2000-08-08

Knepper, David D.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Synthesis

704261, 704278, 704207, 704218, 84602, 84603, 84604, 84623, 84627, 84633, 84659, 84661, G01L 502, G10H 112

Patent

active

061014699

ABSTRACT:
For use in a synthesizer having a wave source that produces a periodic wave, frequency shifting circuitry for frequency-shifting the periodic wave and waveshaping circuitry for transforming the periodic wave into a waveform containing a formant, the frequency-shifting causing displacement of the formant, a circuit for, and method of, compensating for the displacement and a synthesizer employing the circuit or the method. In one embodiment, the circuit includes bias circuitry, coupled to the wave source and the frequency shifting circuitry, that introduces a bias into the periodic wave based on a degree to which the frequency shifting circuitry frequency shifts the periodic wave, the bias reducing a degree to which the formant is correspondingly frequency-shifted.

REFERENCES:
patent: 5007095 (1991-04-01), Nara
patent: 5641929 (1997-06-01), Okamoto et al.
patent: 5691496 (1997-11-01), Suzuki et al.
Patent Abstracts of Japan: vol. 017, No. 707 (P-1667), Dec. 24, 1993 & JP 05 241580 A (Yamaha Corp), Sep. 21, 1993 * Abstract *.
Patent Abstracts of Japan: vol. 015, No. 030 (P-1157), Jan. 24, 1991 & JP 02 271398 A (Yamaha Corp), Nov. 6, 1990 * Abstract *.
"Digital Waveshaping Synthesis*" by Marc Le Brun: Journal of the Audio Engineering Society Apr. 1979; vol. 27, No. 4, pp. 250-266.

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