Speech decoding apparatus and method using prediction and class taps
US7269559B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2002 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Apr 13, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a data processing apparatus capable of obtaining high-quality sound, etc. A tap generation section 121 generate a prediction tap from synthesized speech data for 40 samples in a subframe of subject data of interest within the synthesized speech data such that speech coded data coded by a CELP method, and synthesized speech data in which a position in the past from a subject subframe by a lag indicated by an L code located in that subject subframe is a starting point. Then, a prediction section 125 decodes high-quality sound data by performing a predetermined prediction computation by using the prediction tap and a tap coefficient stored in a coefficient memory 124. The present invention can be applied to mobile phones for transmitting and receiving speech.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.