Methods and systems for reducing requantization-originated generational error in predictive video streams using motion compensation
US6804299B2 · kind B2 · utility
17Cited by
3References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 15, 2001 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Jan 16, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/86
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Adaptive compensation for requantization. A reference picture is decoded. Another copy of the reference picture is then requantized and then decoded. Next, an error picture is calculated and stored. The error picture represents the difference between the reference picture as decoded without requantization and the reference picture as decoded with requantization. The error picture and the requantized reference picture are used to generate a predictive picture that at least partially compensates for generational error introduced by requantization. This compensation for error may be adaptively performed based on system conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.