Low-delay low-bit-rate speech coder
US5142583A · kind A · utility
14Cited by
5References
11Claims
0Family size
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Key dates
| Filing date | May 14, 1990 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | May 14, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A vector quantizing speech coder includes a Short-Term-Predictive filter which receives originally sampled speech signal s(n) and decorrelates it into a residual signal r(n). A device is provided to quantize the residual signal r(n) at a low bit rate. The device also generates a reconstructed signal r(n) from which coefficients for adjusting the Short-Term-Predictive filter are dynamically derived.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.