System for generating formant tracks by modifying formants synthesized from speech units
US6502066B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 2001 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Apr 2, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2025/906
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Formants, corresponding to input speech units based either on a known text or the results of a speech recognition procedure, are generated from a formant synthesizer. A frequency response is generated based on the synthesized formants. A second frequency response is generated based on a speech signal which is received and which corresponds to utterances of speech units. The synthesized formants are modified based on a comparison of the frequency response corresponding to the synthesized formants and specific proportional characteristics of a frequency response of the input speech signal. In one illustrative embodiment, the comparison is then recalculated and further modifications are made accordingly to improve accuracy. In one illustrative embodiment, time aligning and frequency warping are utilized as modification functions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.