Efficient temporal envelope coding approach by prediction between low band signal and high band signal
US8352279B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 2009 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | Apr 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
This invention proposes a more efficient way to quantize temporal envelope shaping of high band signal by benefiting from energy relationship between low band signal and high band signal; if low band signal is well coded or it is coded with time domain codec such as CELP, temporal envelope shaping information of low band signal can be used to predict temporal envelope shaping of high band signal; the temporal envelope shaping prediction can bring significant saving of bits to precisely quantize temporal envelope shaping of high band signal. This prediction approach can be combined with other specific approach to further increase the efficiency and save mores bits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.