Speech segment coding and pitch control methods for speech synth

Details Speech segment coding and pitch control methods for speech synth Speech segment coding and pitch control methods for speech synth

1994-07-14

1997-04-01

MacDonald, Allen R.

395 291, 395 294, G01L 106, G06F 1500

Patent

active

056175078

ABSTRACT:
The present invention relates to a method and system for synthesizing speech utilizing a periodic waveform decomposition and relocation coding scheme. According to the scheme, signals of voiced sound interval among original speech are decomposed into wavelets, each of which corresponds to a speech waveform for one period made by each glottal pulse. These wavelets are respectively coded and stored. The wavelets nearest to the positions where the wavelets are to be located are selected from stored wavelets and decoded. The decoded wavelets are superposed to each other such that original sound quality can be maintained and duration and pitch frequency of speech segment can be controlled arbitrarily.

REFERENCES:
patent: 3700815 (1972-10-01), Doddington et al.
patent: 4912768 (1990-03-01), Benbassat
patent: 4914701 (1990-04-01), Zibman
A Diphone Synthesis System Based on Time-Domain Prosodic Modification of Speech, pp. 238-241, vol. 1, ICASSP May 23-26, 1989, Hamon et al.
Improving Naturalness in Text-To-Speech Synthesis Using Natural Glottal Source, pp. 769-772, vol. 2, ICASSP, May 14-17, 1991, Matsui et al.

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