Method for trick playing on streamed and encrypted multimedia

H - Electricity – 04 – L

Patent

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Details

H04L 29/06 (2006.01)

Patent

CA 2656144

The multimedia data transmitting apparatus (101) according to the present invention includes: a message receiving unit (4003) which receives a request message including a transmission start requested position and a transmission end requested position; a transmission position adjustment unit (4005) which performs at least one of a first adjustment process of adjusting the transmission start position to a unit of encryption boundary immediately ahead of the transmission start requested position or ahead of the boundary, and a second adjustment process of adjusting the transmission end position to a unit of encryption boundary immediately behind the transmission end requested position or behind the boundary; a data transmitting unit (4006) which transmits, to a terminal (102), multimedia data from the adjusted transmission start position up to the adjusted transmission end position, and first information indicating the transmission start requested position and the transmission end requested position within the multimedia data.

La présente invention porte sur un appareil de transmission de données multimédia (101) qui comprend : une unité (4003) de réception de message qui reçoit un message de requête comprenant une position demandée de départ de transmission et une position demandée de fin de transmission; une unité (4005) d'ajustement de position de transmission qui effectue au moins un premier traitement d'ajustement consistant à ajuster la position de départ de transmission à une unité de limite de cryptage immédiatement devant la position demandée de départ de transmission ou devant la limite, et un second traitement d'ajustement consistant à ajuster la position de fin de transmission à une unité de limite de cryptage immédiatement derrière la position demandée de fin de transmission ou derrière la limite; une unité (4006) de transmission de données qui transmet des données multimédia, à un terminal (102), à partir de la position de départ de transmission ajustée jusqu'à la position de fin de transmission ajustée, et de premières informations indiquant la position demandée de départ de transmission et la position demandée de fin de transmission à l'intérieur des données multimédia.

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