Apparatus and method for encoding/decoding a speech signal using adaptively changing codebook vectors
US5828996A · kind A · utility
47Cited by
18References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 25, 1996 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Oct 25, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An encoding apparatus in which an input speech signal is divided into blocks and encoded in units of blocks. The encoding apparatus includes an encoding unit for performing CELP encoding having a noise codebook memory containing having codebook vectors generated by clipping Gaussian noise and codebook vectors obtained by learning using the code vectors generated by clipping the Gaussian noise as initial values. The encoding apparatus enables optimum encoding for a variety of speech configurations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.