Digitally watermarking physical media
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United States of America Patent
Stats
-
Jul 24, 2007
Grant Date -
Oct 10, 2002
app pub date -
Sep 20, 2001
filing date -
Apr 6, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A digital watermark is embedded through varying pit locations on a data side of a CD, SACD or DVD. In one embodiment, a pattern of pits or data indentations forms a visual design on the data side. A watermark is embedded by slightly varying various pit locations within the visual design. In another embodiment, the varied pit locations are imperceptible or nearly imperceptible to human observation. The digital watermark is used as a counterfeit deterrent and as an identifier. Once extracted, the identifier is used to link to related content via the internet.
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