Digital watermark systems and methods
US8364966B2 · kind B2 · utility
3Cited by
182References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2007 |
| Grant date | Jan 29, 2013 |
| Priority date | — |
| Expiry date | Oct 28, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/327
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital watermark is added to audio or visual content. An illustrative embodiment permutes the content, alters the permuted content to encode a watermark, and inverse-permutes the content to return same to substantially its original form. Related watermark decoding methods are also detailed, as are ancillary features and techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.