Time-warping frames of wideband vocoder
US8239190B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2006 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Apr 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/087
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of communicating speech comprising time-warping a residual low band speech signal to an expanded or compressed version of the residual low band speech signal, time-warping a high band speech signal to an expanded or compressed version of the high band speech signal, and merging the time-warped low band and high band speech signals to give an entire time-warped speech signal. In the low band, the residual low band speech signal is synthesized after time-warping of the residual low band signal while in the high band, an unwarped high band signal is synthesized before time-warping of the high band speech signal. The method may further comprise classifying speech segments and encoding the speech segments. The encoding of the speech segments may be one of code-excited linear prediction, noise-excited linear prediction or ⅛ frame (silence) coding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.