Invention Grant
- Patent Title: Method and apparatus for multicast delivery of program information
- Patent Title (中): 用于多播传送节目信息的方法和装置
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Application No.: US11201675Application Date: 2005-08-11
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Publication No.: US07865723B2Publication Date: 2011-01-04
- Inventor: Petr Peterka , Alexander Medvinsky
- Applicant: Petr Peterka , Alexander Medvinsky
- Applicant Address: US PA Horsham
- Assignee: General Instrument Corporation
- Current Assignee: General Instrument Corporation
- Current Assignee Address: US PA Horsham
- Agent Larry T. Cullen
- Main IPC: H04L29/06
- IPC: H04L29/06

Abstract:
Method and apparatus providing program information to client devices for at least one multicast stream of digital content is described. In one embodiment, session description messages for the at least one multicast stream of digital content are generated. Each of the session description messages includes at least one content access parameter. The at least one content access parameter may include digital rights management (DRM) data, channel key identification data associated with the at least one channel of the at least one multicast stream of digital content, and/or data indicative of whether each session description message is associated with a channel, a program, or a program segment. Each of the session description messages is signed using a cryptographic key. The session description messages are then multicasted to the client devices using a predefined multicast address.
Public/Granted literature
- US20060050701A1 Method and apparatus for multicast delivery of program information Public/Granted day:2006-03-09
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