Wideband speech synthesis from a narrowband speech signal
US6691083B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2000 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Aug 31, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0001
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Wideband speech is synthesized from a bandlimited speech signal, for example from speech which has been transmitted via the public switched telephone network. Due to the nature of the vocal tract, there is a correlation between a bandlimited signal and those parts of an original wideband speech signal which are missing from that signal. Narrowband speech is characterized in terms of estimated formant frequencies provided by a peak picker. The frequency of formants in speech give a good indication, for voiced sounds, as to the shape of the vocal tract. The set of frequencies provided by the peak picker is used to access a codebook which provides synthesis parameters for use by a synthesizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.