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

H - Electricity

04

M

H04M 1/65 (2006.01) G10L 21/04 (2006.01) G10L 9/14 (1990.01)

Patent

CA 2097548

11 ABSTRACT OF THE DISCLOSURE According to the method, the 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. Application to dictaphones, telephone answering machines and vocal message systems. Figure 1.

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