US 7,224,819 · Granted 2007-05-29
Integrating digital watermarks in multimedia content
A method for tracking media signals in multimedia content is provided by uniquely identifying the multimedia content with a digital watermark identifier. A video channel is preferably embedded with a first watermark identifier. The first identifier uniquely identifies the multimedia content or the content family. A second digital watermark is embedded in an audio channel of the multimedia content. The second digital watermark uniquely identifies a user or user device. When the multimedia content is found in an unauthorized or unexpected channel, the content can be traced back to its misappropriating source via the user identifier.
Patent details
- Publication number
- US 7,224,819
- Filing date
- 2002-10-21
- Grant date
- 2007-05-29
- Assignee
- Digimarc Corporation
- Inventor(s)
- LEVY KENNETH L., HANNIGAN BRETT T., BRADLEY BRETT ALAN, RHOADS GEOFFREY B.
- CPC class
- G06K7/1417
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