Excitation vector generator, speech coder and speech decoder
US6757650B2 · kind B2 · utility
8Cited by
9References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 2001 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Oct 16, 2021 |
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.