Method and apparatus for scene-based video watermarking
US6226387A · kind A · utility
195Cited by
36References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1997 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Aug 27, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0202
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for the scene-based watermarking of video data is disclosed. In one embodiment, each of a number of frames of a scene of video host data undergoes a temporal wavelet transform, from which blocks are extracted. The blocks undergo perceptual masking in the frequency domain, such that a watermark is embedded therein. Once the watermark block is taken out of the frequency domain, a spatial mask of the original block is weighted to the watermark block, and added to the original block to obtain the watermarked block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.