Method and device for vocal synthesis at variable speed

Details Method and device for vocal synthesis at variable speed Method and device for vocal synthesis at variable speed

1997-06-25

1998-10-20

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Synthesis

704211, 704219, 704220, G10L 914

Patent

active

058262318

ABSTRACT:
A vocal synthesis method in which a speech signal is reconstituted by the selection from a dictionary of waveforms for the excitation of long-term and short-term predictive filters. To preserve, in the synthetic speech messages read at low speed or high speed, the same pitch and the same spectral characteristics as the messages read at normal speed, the period of excitation of the long-term predictive filter and the ranges of computation of both predictive filters are modified as a function of the speed of synthesis without modifying the values of pitch applied to the long-term predictor. Such a method may find application to dictaphones, telephone answering machines and vocal message systems.

REFERENCES:
patent: 3816664 (1974-06-01), Koch
patent: 3975763 (1976-08-01), Kitamura
patent: 4435832 (1984-03-01), Asada et al.
patent: 4596032 (1986-06-01), Sakurai
patent: 4709390 (1987-11-01), Atal et al.

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