Multiple watermarks in content
US7266217B2 · kind B2 · utility
75Cited by
91References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 2006 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | May 30, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3283
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Image, video, and/or audio data is encoded with at least first and second watermarks. In one implementation a method includes: receiving content; embedding a first watermark signal in the content; compressing the content; embedding a second watermark signal in the content. The first watermark signal and the second watermark signal are designed to respond differently to at least a first type of signal processing. Other implementations are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.