Speech generation using variable frequency oscillators

Details Speech generation using variable frequency oscillators Speech generation using variable frequency oscillators

1990-08-13

1992-08-18

Shaw, Dale M.

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Loudspeaker operation

G10L 706, G10L 502

Patent

active

051406390

ABSTRACT:
Artificial speech is produced with minimized memory requirements by using a bank of digital oscillators to produce voiced sounds by combining multiple harmonies of a fundamental-frequency sine wave, and using only one of these oscillators to reproduce stored nonsinusoidal waveforms for unvoiced sounds. Sufficient dynamic range is achieved with a minimum number of oscillators by generating only every other harmonic at the higher frequencies. All harmonics are derived from a single stored digitized sine wave by using stored sets of skip counts and amplitude codes corresponding to various voiced sounds to be produced.

REFERENCES:
patent: 3668294 (1972-06-01), Kameoka et al.
patent: 3830977 (1974-08-01), Dechaux
patent: 3974334 (1976-08-01), Cockerell
patent: 3995116 (1976-11-01), Flanagan
patent: 4360708 (1982-11-01), Taguchi et al.
patent: 4584922 (1986-04-01), Kamiya
patent: 4624012 (1986-11-01), Lin et al.
Flanagan, Speech Analysis Synthesis and Perception, Second Edition, pp. 212-214, New York 1972 by Springer Verlag.

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