Method and apparatus for modifying a video stream to encode metadata
US9330428B2 · kind B2 · utility
2Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 11, 2013 |
| Grant date | May 3, 2016 |
| Priority date | — |
| Expiry date | Apr 22, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0065
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A watermark encoder receives a current video image together with current metadata associated with the current image. A metadata delay also makes available to the watermark decoder delayed metadata associated respectively with four or more of the preceding. Then the watermark encoder modifies pixel values of the current image not only to encode the current metadata but also the delayed metadata. At a decoder, if metadata for the current image is corrupted or missing, it can be recovered from one of the succeeding images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.