Encoding a speech signal using code excited linear prediction using a plurality of codebooks
US6389388B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Nov 13, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech signal is encoded using code excited linear prediction for use in transmitting the speech signal to a receiver. The speech signal is sampled. A current sample of the speech signal is predicted based on in part a previous sample. An innovation sequence is determined based on in part a prediction error between the predicted current sample and the current sample of the speech signal. A code from each of a plurality of codebooks is selected. A combination of the selected codes is the determined innovation sequence. An index of the selected codes is identified and transmitted to the receiver. The transmitted index enables reconstruction of the speech signal at the receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.