Scalable video encoder/decoder with drift control
US6961383B1 · kind B1 · utility
31Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2001 |
| Grant date | Nov 1, 2005 |
| Priority date | — |
| Expiry date | Aug 19, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Scalable video coders have traditionally avoided using enhancement layer information to predict the base layer, so as to avoid so-called “drift”. As a result, they are less efficient than a one-layer coder. The present invention is directed to a scalable video coder that allows drift, by predicting the base layer from the enhancement layer information. Through careful management of the amount of drift introduced, the overall compression efficiency can be improved while only slighly degrading resilience for lower bit-rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.