Context-based adaptive binary arithmetic coding (CABAC) video stream compliance
US8594366B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2009 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | May 30, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of providing CABAC compliant changes such as watermarks comprises accessing encoded data such as video which comprise at least two blocks; creating or accessing a list of changes to the encoded data that include a direct change to a block; determining motion character or motion vector differential of non-immediate block, non-immediate blocks being adjacent to an immediate block that are immediately adjacent to the block; determining change to the immediate block based on original motion character of the block and the non-immediate block and the motion character of the block that would result from the application of the change; storing the change to the list if the change does not cause a difference to the immediate block; and evaluating other potential changes if other potential changes are available, wherein the other potential changes are subjected to the same process steps as the direct change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.