Method and system for data delivery and reproduction
First Claim
1. A method of watermarking title data with identification data, the method comprising the steps of:
- identifying a plurality of possible placement locations in the title data based on characteristics of the title data;
selecting a plurality of placement locations from the plurality of possible placement locations;
randomly selecting a plurality of number to frequency modulation relationships; and
frequency modulating at least a portion of the title data at each of the plurality of selected placement locations with the identification data using one of the selected plurality of number to frequency modulation relationships.
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Accused Products
Abstract
A system and method for distributing title data, such as songs, videos or computer games. The title data is provided from a central location to a customer who may purchase or rent a copy of the title data. The title data is made available on a computer readable media, which may be physical media, such as a CD or DVD, or virtual media, such as a computer network. Before distribution, the title data is watermarked with information to identify the customer to whom the title data was distributed. The watermark may be created using identifying information to modulate the title data using a randomly selected modulation scheme at multiple randomly selected locations. The system stores an indication of the locations and frequency modulation scheme, allowing the identifying information to be recovered from the watermarked copy of the title data.
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Citations
26 Claims
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1. A method of watermarking title data with identification data, the method comprising the steps of:
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identifying a plurality of possible placement locations in the title data based on characteristics of the title data; selecting a plurality of placement locations from the plurality of possible placement locations; randomly selecting a plurality of number to frequency modulation relationships; and frequency modulating at least a portion of the title data at each of the plurality of selected placement locations with the identification data using one of the selected plurality of number to frequency modulation relationships. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of watermarking title data with identification data, the method comprising:
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identifying a plurality of locations in the title data based on properties of the title data; randomly selecting a subset of placement locations from the plurality of identified locations; for each placement location in the subset; (i) randomly selecting one of a plurality of number to frequency modulation relationships; (ii) modulating the title data at the placement location with the identification data based on the selected number to frequency modulation relationship; and storing an indication of the randomly selected subset of placement locations and randomly selected number to frequency modulation relationships. - View Dependent Claims (26)
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Specification