Enforcement of content rights and conditions for multimedia...

Details Enforcement of content rights and conditions for multimedia... Enforcement of content rights and conditions for multimedia...

H - Electricity

04

L

H04L 12/14 (2006.01) H04L 29/06 (2006.01) H04N 5/00 (2006.01) H04N 7/16 (2006.01) H04N 7/167 (2006.01) H04N 7/173 (2006.01)

Patent

CA 2426159

According to one embodiment of the invention, a free preview of a program can be provided to client computers in a multicasting system. This can allow viewers in the multicasting system to view a first portion of the program before deciding whether to order the program content. According to another embodiment, various distribution methods can be accomplished using encryption keys to distribute program content. According to yet another embodiment, an initial viewing period can be provided to allow negotiation of the encryption keys. According to another embodiment, rules and conditions for providing content in a multicasting environment can be utilized.

Cette invention a trait à un aperçu libre d'un programme fourni à des ordinateurs clients dans un système de multidiffusion. Les visualiseurs peuvent dans un système de multidiffusion visionner une première partie du programme, avant de décider de commander ou non le contenu du programme. Selon un autre mode de réalisation, on peut réaliser divers procédés de distribution au moyen des clés de chiffrement pour distribuer le contenu du programme. Selon un autre mode de réalisation, une période de visualisation initiale peut être mise à disposition pour permettre la négociation des clés de chiffrement. Selon un autre mode de réalisation, on peut utiliser des règles et des conditions de distribution du contenu dans un environnement multidiffusion.

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