Method and apparatus for dynamically adapting a vector-quantizing coder codebook
US5007092A · kind A · utility
31Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1989 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Oct 13, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0005
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A signal vector quantizing coder (CELP) is provided with an adaptive codebook originally loaded with preselected codewords. The codebook is split into a fixed contents portion and a fixed length adaptive contents portion. During coding operations, the codewords dynamically selected for coding the coder input signal are shifted into the fixed length adaptive codebook section for codebook contents updating purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.