Video transcoder with drift compensation
US7088780B2 · kind B2 · utility
17Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 2001 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Nov 8, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method compensates for drift in macroblocks of a partially decoded input bitstream. The macroblocks include intra-mode and inter-mode macroblocks, and each macroblock includes DCT coefficients, and at least one motion vector. An estimate of drift is measured in the partially decoded input bitstream. The estimated drift is translated into an intra refresh rate. The modes of inter-mode macroblock are mapped to intra-mode macroblock according to the refresh rate. The DCT coefficients and the motion vector for each changed macroblock are modified in accordance with the mapping for each changed macroblock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.