In-band wavelet video coding with spatial scalability
US7801220B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2005 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Jul 22, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Exemplary improvements for in-band wavelet video coding with spatial scalability are described. In one implementation an encoder uses leaky prediction to balance a trade-off between reducing drifting errors at lower resolutions while maintaining coding performance at higher resolutions. In an alternative implementation, a trade-off technique defines two coding modes at the macroblock level. The first mode includes predictions employed at a low quality reference while the second mode includes predictions employed at a high quality reference. The method then adaptively selects the proper coding mode for each macroblock according to a rate-distortion criterion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.