Expressivity of voice synthesis by emphasizing source signal features
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United States of America Patent
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Oct 12, 2004
Grant Date -
Feb 28, 2002
app pub date -
Jun 1, 2001
filing date -
Jun 2, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Voice synthesis with improved expressivity is obtained in a voice synthesiser of source-filter type by making use of a library of source sound categories in the source module. Each source sound category corresponds to a particular morphological category and is derived from analysis of real vocal sounds, by inverse filtering so as to subtract the effect of the vocal tract. The library may be parametrical, that is, the stored data corresponds not to the inverse-filtered sounds themselves but to synthesis coefficients for resynthesising the inverse-filtered sounds using any suitable re-synthesis technique, such as the phase vocoder technique. The coefficients are derived by Short Time Fourier Transform (STFT) analysis.
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