Content authentication and recovery using digital watermarks
US7389420B2 · kind B2 · utility
45Cited by
42References
44Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 18, 2001 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Apr 11, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3283
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The disclosure describes methods for using digital watermarking to authenticate digital media signals, such as images, audio and video signals. It also describes techniques for using embedded watermarks to repair altered parts of a media signal when alteration is detected. Alteration is detected using hashes, digital watermarks, and a combination of hashes and digital watermarks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.