Vector coding method and apparatus and computer program
US7738558B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 2008 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Dec 23, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/038
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A vector coding apparatus and method includes decomposing an initial vector to obtain a sign vector and an initial absolute vector. Coding the sign vector to obtain a sign code, performing multi-level permutation-based coding on the initial absolute vector to obtain an absolute vector code, and combining the sign code and the absolute vector code. Optionally determining, before decomposing the initial vector, a characteristic codebook to which the initial vector belongs, obtaining a characteristic value of the characteristic codebook, and combining a code of the initial vector to obtain a final code of the initial vector. The performing step can include removing from the initial absolute vector any element having a value which satisfies a preset condition, constructing a new absolute vector with elements not satisfying the preset condition, and coding positions of the elements not satisfying the preset condition in the initial absolute vector to obtain a position code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.