Identifying material using a watermark and a signature
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United States of America Patent
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Oct 19, 2010
Grant Date -
Sep 26, 2002
app pub date -
Dec 4, 2001
filing date -
Apr 5, 2000
priority date (Note) -
In Force
status (Latency Note)
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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.
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