System and method for protecting digital media
First Claim
1. A system for marking a digital recording, wherein the digital recording includes a plurality of tracks, the system comprising:
- a mechanism for dividing the digital recording into a plurality of first sections interleaved with a plurality of second sections;
a mechanism for calculating an identifier as a function of data contained in each of the plurality of first sections; and
a watermarking mechanism for watermarking each of the plurality of second sections with information related to the identifier.
1 Assignment
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Accused Products
Abstract
A system and method for verifying digital recordings that have a plurality of tracks. The invention provides a protection system and method that verifies ownership of a digital recording by requiring the presence of the entire or significant portion of the medium (e.g., CD) as it existed when the digital recording was originally distributed.
Verification is accomplished by providing a mechanism that can generate a watermarked digital recording that comprises a plurality of first sections interleaved with a plurality of second sections, wherein the second sections include watermark information relating to data contained in the first sections. A compliant device is also provided that examines the watermarked digital recording and compares the data contained in the first sections with the watermark information to determine if any of the first sections have been removed or modified.
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Citations
28 Claims
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1. A system for marking a digital recording, wherein the digital recording includes a plurality of tracks, the system comprising:
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a mechanism for dividing the digital recording into a plurality of first sections interleaved with a plurality of second sections;
a mechanism for calculating an identifier as a function of data contained in each of the plurality of first sections; and
a watermarking mechanism for watermarking each of the plurality of second sections with information related to the identifier. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for verifying a digital recording, comprising:
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a mechanism for reading a plurality of first sections from the digital recording and calculating a first verification identifier from data contained in the plurality of first sections;
a mechanism for reading watermarks from each of a plurality of second sections from the digital recording;
a mechanism for determining a second verification identifier from at least one of the watermarks; and
a mechanism for comparing the first verification identifier and the second verification identifier. - View Dependent Claims (9, 10, 11, 12, 14, 15, 16, 18, 20, 21, 22, 23, 24, 25, 26, 28)
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13. A program product stored on a recordable media for marking a digital recording having a plurality of tracks that, when executed, comprises:
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means for dividing the digital recording into a plurality of first sections interleaved with a plurality of second sections;
means for calculating an identifier as a function of data contained in each of the plurality of first sections; and
means for watermarking each of the plurality of second sections with information related to the identifier.
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17. A program product stored on a recordable media for verifying a digital recording that, when executed, comprises:
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means for reading a plurality of first sections from the digital recording and calculating a first verification identifier from data contained in the plurality of first sections;
means for reading watermarks from each of a plurality of second sections from the digital recording;
means for determining a second verification identifier from at least one of the watermarks; and
means for comparing the first verification identifier and the second verification identifier.
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19. A method for processing a digital recording, the method comprising:
marking the digital recording with the steps of;
dividing the digital recording into a plurality of first sections interleaved with a plurality of second sections;
calculating an identifier as a function of data contained in each of the plurality of first sections; and
watermarking each of the plurality of second sections with information related to the identifier.
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27. A watermarked digital recording having a plurality of tracks, comprising:
a plurality of first sections interleaved with a plurality of second sections, wherein the second sections include watermark information relating to data contained in the first sections.
Specification