Data processing: speech signal processing – linguistics – language – Speech signal processing – Synthesis
Patent
1996-09-20
2000-02-22
Dorvil, Richemond
Data processing: speech signal processing, linguistics, language
Speech signal processing
Synthesis
704262, G10L 302
Patent
active
060291346
ABSTRACT:
A speech synthesizing method and apparatus arranged to use a sinusoidal waveform synthesis technique provide for preventing degradation of acoustic quality caused by the shift of the phase when synthesizing a sinusoidal waveform. A decoding unit decodes the data from an encoding side. The decoded data is transformed into the voiced/unvoiced data through a bad frame mask unit. Then, an unvoiced frame detecting circuit detects an unvoiced frame from the data. If there exist two or more continuous unvoiced frames, a voiced sound synthesizing unit initializes the phases of a fundamental wave and its harmonic into a given value such as 0 or .pi./2. This makes it possible to initialize the phase shift between the unvoiced and the voiced frames at a start point of the voiced frame, thereby preventing degradation of acoustic quality such as distortion of a synthesized sound caused by dephasing.
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Yang H. et al. "Quadratic Phase Interpolation for Voiced Speech Synthesis in MBE Model" Electronics Letters, vol. 29, No. 10, May 13, 1993; p. 856-857.
Matsumoto Jun
Nishiguchi Masayuki
Dorvil Richemond
Maioli Jay H.
Sony Corporation
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