Method and apparatus to search fixed codebook and method and apparatus to encode/decode a speech signal using the method and apparatus to search fixed codebook
US8595000B2 · kind B2 · utility
1Cited by
4References
34Claims
0Family size
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Key dates
| Filing date | Feb 22, 2007 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | May 30, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0013
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus to encode and decode a speech signal using a code excited linear prediction (CELP) algorithm. In order to reduce a bit rate without degrading performance in an enhancement layer based on CELP, each of a fixed codebook of a core layer and a fixed codebook of the enhancement layer is divided into a plurality of spaces. The spaces of the fixed codebook of the enhancement layer excludes a space corresponding to a least distorted space determined from among the spaces of the fixed codebook of the core layer are searched.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.