Digitally watermarking physical media
First Claim
Patent Images
1. A method comprising:
- altering values representing a visual design to embed a plural-bit digital watermark therein; and
applying the embedded visual design to physical media through changes to a pit-pattern carried by the physical media, wherein the changes to the pit-pattern convey the visual design including the digital watermark embedded therein.
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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.
179 Citations
29 Claims
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1. A method comprising:
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altering values representing a visual design to embed a plural-bit digital watermark therein; and applying the embedded visual design to physical media through changes to a pit-pattern carried by the physical media, wherein the changes to the pit-pattern convey the visual design including the digital watermark embedded therein. - View Dependent Claims (2, 3, 4, 5, 29)
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6. Media including a plurality of pits, said media comprising:
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a visual design formed by the plurality of pits; and a plural-bit digital watermark embedded within the visual design through subtle changes to data representing the visual design. - View Dependent Claims (7, 8, 9, 10)
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11. A method involving media comprising a first machine-readable digital watermark formed by pit placement on a data side of the media, said media further comprising a second machine-readable digital watermark embedded on a non-data side of the media, said method comprising:
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receiving first optical scan data corresponding to the data side and second optical scan data corresponding to the non-data side; decoding the first watermark and second watermark from the respective first and second scan data; and linking to content related to the media through information carried by the first or second watermark, wherein said first watermark is compared to the second watermark to authenticate the media. - View Dependent Claims (12, 13, 14, 23)
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15. A method to identify physical media comprising:
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analyzing a visual pattern on the physical media through at least one of hashing and fingerprinting of the visual pattern to derive a plural-bit identifier from the visual pattern itself, wherein the visual pattern is provided with a pit-pattern arranged on or in the surface of the media; and identifying the physical media through said analyzing. - View Dependent Claims (16, 17, 18, 28)
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19. Optical storage media comprising:
a data side comprising a plurality of pits, wherein physical locations for a set of the pits are arranged to convey a graphic design or visual image, and wherein the graphic design or visual image comprises a plural-bit digital watermark embedded therein through subtle changes to data representing the visual design, wherein the plural-bit digital watermark is detectable from a 2-dimensional image of the data side. - View Dependent Claims (20, 21, 22)
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24. A method comprising:
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receiving optical scan data representing at least a portion of a data side of physical media, wherein the data side of the physical media comprises a machine-readable watermark formed through a pit pattern formed on or in the data side of the physical media decoding the watermark to obtain a plural-bit message; linking to a remote resource using at least some information carried by the message, whereby successfully completing said linking authenticates the physical media. - View Dependent Claims (25, 26, 27)
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Specification