Speech coder using a non-uniform pulse type sparse excitation codebook
US5774840A · kind A · utility
6Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1995 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Aug 8, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An excitation codebook 351 includes a plurality of codevectors each generated with pulse positions and amplitudes obtained by training such as to reduce the distance between the codevector and training speech data. The excitation codebook 351 further includes a plurality of sparse codevectors each generated with the pulse number, pulse positions and amplitudes obtained by training such as to reduce the distance between the codevector and training speech data, the individual codevectors having different pulse numbers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.