REW parametric vector quantization and dual-predictive SEW vector quantization for waveform interpolative coding
US7584095B2 · kind B2 · utility
0Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2005 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | Dec 30, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/097
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An enhanced analysis-by-synthesis waveform interpolative speech coder able to operate at 2.8 kbps. Novel features include dual-predictive analysis-by-synthesis quantization of the slowly-evolving waveform, efficient parametrization of the rapidly-evolving waveform magnitude, and analysis-by-synthesis vector quantization of the rapidly evolving waveform parameter. Subjective quality tests indicate that it exceeds G.723.1 at 5.3 kbps, and of G.723.1 at 6.3 kbps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.