Digital content distribution system and method

US7698570B2 · kind B2 · utility

Assignee

• Dolby Laboratories Licensing Corporation · US

Inventors

• Robert Wilhelm Schumann · Madison, US
• Richard Whittemore · Herndon, US
• David Goldschlag · Silver Spring, US
• David William Kravitz · San Jose, US
• Siu-Leong Iu · Falls Church, US
• Guillaume Mercier · McLean, US
• Michael Bergeron · Pineville, US
• Jack Ehrhardt · Richmond, US
• Richard Vitkus · Richmond, US

Key dates

• Filing date: Oct 11, 2006
• Grant date: Apr 13, 2010
• Expiry date: Nov 8, 2028

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2463/101
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A content distribution system and method which prevents unauthorized access to secured content such as movies and music. The system includes a source, a receiver, an authorized security device such as a conditional access module (CAM) for decrypting authorized content and an output device for outputting content. The system can also include a backend for managing accounts and system operations. One aspect of this invention is that the content data is derived from the Internet. The system allows for the verification of authorization to play secured content, the addition of watermarks to the secured content, the conversion of the secured content to a displayable form and the means for preventing output of the secured content.