Integrating digital watermarks in multimedia content
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United States of America Patent
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May 29, 2007
Grant Date -
Jun 5, 2003
app pub date -
Oct 21, 2002
filing date -
May 8, 1995
priority date (Note) -
In Force
status (Latency Note)
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Abstract
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.
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