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US 2004/0174996 A1Published application
Digital rights management
AssigneeDigimarc Corporation
InventorsAhmed Tewfik, Ahmed Sallam
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AssigneeDigimarc Corporation
InventorsAhmed Tewfik, Ahmed Sallam
Estimating the term…
A digital rights management system employs digital watermarks to enable users to sample public versions of music, movies and other content, and access private versions of that content whose use is controlled through encryption and associated content usage rules. In a system designed for personal computers, the system includes a digital watermark detector that operates within the operating system to intercept content signals from a device driver. The detector extracts the digital watermarks from the content signals to identify them as public or private content. The public content enables a user to sample the content. The watermark in the public content provides a mechanism for locating the private content and associated decryption key and usage rules governing playback of the private content.
A method for management of media content comprising:
A method of embedding a digital watermark into a host media signal comprising:
A method of detecting a digital watermark embedded in a host signal comprising:
A method of digital watermarking a media signal comprising:
A method of detecting a digital watermark in a host signal comprising:
Dependencies are inferred from the claim text.