Selective inactivation and copy-protection

Details Selective inactivation and copy-protection Selective inactivation and copy-protection

H - Electricity

04

N

H04N 5/91 (2006.01) G11B 20/10 (2006.01) H04N 7/16 (2006.01) H04N 7/167 (2006.01) H04N 7/173 (2006.01) H04H 1/00 (2006.01)

Patent

CA 2428509

The present invention teaches a method for selectively preventing the access by a client to data-on-demand (DOD) services comprising the acts of: receiving at least one DOD service (706, 707), and receiving at least one associated expiration information packet corresponding to the at least one DOD service (704), wherein the at least one expiration information packet indicates a first predetermined time after which the at least one DOD service may no longer be accessed; and storing at least a portion of the at least one DOD service in memory location (708). In a second embodiment the method further comprises the act of receiving at least one associated copy protection information packet corresponding to the at least one DOD service (804, 834, 854), wherein the at least one copy protection information packet indicates a second predetermined time after which copying of the at least one DOD service will be hindered.

La présente invention concerne un procédé permettant d'empêcher un client d'accéder à des services de fourniture de données à la demande (Data-on-demand/DOD). Ce procédé consiste à : recevoir au moins un service DOD (706, 707) et au moins un paquet connexe d'informations d'expiration correspondant à au moins un service DOD (704), dans lequel au moins un paquet d'informations d'expiration indique une première durée prédéterminée au delà de laquelle le service DOD considéré ne sera plus accessible ; et stocker au moins une partie dudit service DOD dans un emplacement mémoire (708). Selon un second mode de réalisation, le procédé consiste en outre à recevoir au moins un paquet d'information sur la protection de copies connexes correspondant au service DOD en question, (804, 834, 854). Ici, au moins un paquet d'information sur la protection des copies indique une seconde durée prédéterminée au delà de laquelle le copiage du service DOD considéré sera interdit.

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