Identifying material using a watermark and a signature
US7818577B2 · kind B2 · utility
8Cited by
13References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2001 |
| Grant date | Oct 19, 2010 |
| Priority date | — |
| Expiry date | Nov 10, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3236
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of identifying material comprises the step of inserting an identifying code into a signal as a watermark, and deriving a signature from the material. The code and signature are stored in a database. The watermarked signal may be distributed and/or transmitted through a network. The signal may be processed in the network. A monitor derives from the received signal, the signature and the code. They are compared with the stored signature and code to check the provenance of the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.