Speech transformation system
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United States of America Patent
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Jul 5, 1994
Issued Date -
N/A
app pub date -
Aug 31, 1993
filing date -
Mar 2, 1992
priority date (Note) -
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Abstract
A high quality voice transformation system and method operates during a training mode to store voice signal characteristics representing target and source voices. Thereafter, during a real time transformation mode, a signal representing source speech is segmented into overlapping segments, analyzed to separate the excitation spectrum from the tone quality spectrum. A stored target tone quality spectrum is substituted for the source spectrum and then convolved with the actual source speech excitation spectrum to produce a transformed speech signal having the word and excitation content of the source, but the acoustical characteristics of a target speaker. The system may be used to enable a talking, costumed character, or in other applications where a source speaker wishes to imitate the voice characteristics of a different, target speaker.
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