Speech transformation system
US5327521A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1993 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Aug 31, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/0135
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.