Method and apparatus for inserting video watermark in compression domain
US8094871B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2007 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Oct 2, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0053
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for video watermarking are provided. The apparatus and method include receiving a bit stream encoded by a video encoder by a spatial domain information analyzer and extracting information from a spatial domain of an image with respect to code words forming the bit stream, grouping the code words for each segmented domain by a domain classifier based on the information from the spatial domain, determining a sign of the each segmented domain by a domain sign determiner and inserting a watermark in the each segmented domain according to the sign determined by the domain sign determiner by a watermark bit inserter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.