Reducing search complexity for code-excited linear prediction (CELP) coding
US5526464A · kind A · utility
13Cited by
7References
9Claims
0Family size
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Key dates
| Filing date | Apr 29, 1993 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Apr 29, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0013
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A code-excited linear prediction (CELP) coding method and code divide the residual signal into frequency bands. Codebooks provided for each band decrease in size with increasing band frequency. Reduction in codebook size with increasing frequency together with reduction in sampling rate with decreasing frequency provide reductions in codebook search complexity that allow real time implementation on digital signal processor chips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.