Ecm and emm distribution for multimedia multicast content

H - Electricity – 04 – L

Patent

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Details

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 2425159

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 progam content. According to yet another embodiment, an initial viewing period can be provided to allow negociation of the encryption keys. According to another embodiment, rules and conditions for providing content in a multicasting environment can be utilized.

Selon un premier mode de réalisation, l'invention concerne une prévisualisation gratuite de programme pouvant être fournie à des ordinateurs de clients d'un système multidestinataire, ce qui permet à ces utilisateurs de visualiser une première partie de programme avant de demander le contenu de ce programme. Selon un deuxième mode de réalisation, différents procédés de distribution permettent de distribuer un contenu de programme à l'aide de clés de cryptage. Selon un troisième mode de réalisation, une période de visualisation initiale peut être fournie afin de permettre la négociation de clés de cryptage. Selon un quatrième mode de réalisation, on peut utiliser des règles et des conditions de distribution de contenu dans un environnement multidestinataire.

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