Phase vocoder speech synthesis system

Details Phase vocoder speech synthesis system Phase vocoder speech synthesis system

1974-06-05

1976-09-21

Claffy, Kathleen H.

G10L 100

Patent

active

039820700

ABSTRACT:
Disclosed is a system for synthesizing speech from stored signals representative of words precoded in accordance with phase vocoder techniques. The stored signals comprise short-time Fourier transform parameters which describe the magnitude and phase derivative of the short-time signal spectrum. Speech synthesis is achieved by extracting the stored signals of chosen words under control of a duration factor signal, by concatenating the extracted signals, by operating on the phase derivative parameters to effect a desired speech pitch change, by interpolating the magnitude parameters of the short-time Fourier transform in response to the pitch and duration changes, and by decoding the resultant signals in accordance with phase vocoder techniques.

REFERENCES:
patent: 3360610 (1967-12-01), Flanagan
patent: 3369077 (1967-12-01), French
patent: 3450838 (1969-06-01), Bandat
patent: 3828132 (1974-08-01), Flanagan et al.
Flanagan, J. and Golden, R., "Phase Vocoder," Bell Syst. Tech. J., Nov. 1966.

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