REW parametric vector quantization and dual-predictive SEW vector quantization for waveform interpolative coding
US7010482B2 · kind B2 · utility
4Cited by
3References
8Claims
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Key dates
| Filing date | Mar 16, 2001 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Sep 10, 2022 |
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.