Method and apparatus for producing component of excitation vector
US6453288B1 · kind B1 · utility
38Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1998 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Jul 6, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0013
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A random code vector reading section and a random codebook of a conventional CELP type speech coder/decoder are respectively replaced with an oscillator for outputting different vector streams in accordance with values of input seeds, and a seed storage section for storing a plurality of seeds. This makes it unnecessary to store fixed vectors as they are in a fixed codebook (ROM), thereby considerably reducing the memory capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.