An activation method of digital broadcast service system and digital broadcast service

Abstract

The invention relates to a digital broadcasting services system and a digital broadcasting services platform which are used for a user terminal of the system, and a digital broadcasting services activation method. A content scrambling module uses control word to make scrambling to the program content, and the digital broadcasting network broadcasts the program content which is scrambled; the digital broadcasting services platform encrypts the control word to produce entitlement management message which is sent to the user terminal by mobile communication network. The invention sends the entitlement management message by mobile network, thereby saving digital broadcasting bandwidth; each user can only receive the own entitlement management message, thereby increasing safety of the system and reducing the workload of terminals; the invention adopts a point to point way to send business activation authentication information, thereby greatly increasing business activation speed.

Description

technical field [0001] The invention relates to digital broadcast technology, in particular to a digital broadcast service platform, a user terminal and system, and a digital broadcast service activation method. Background technique [0002] With the development of mobile information services, real-time mobile multimedia services have attracted much attention from users. Among them, the business based on digital broadcasting is an important direction of mobile multimedia business. [0003] At present, the existing digital broadcast services generally adopt the conditional access system based on the broadcast network to protect the service and content, that is, all video and audio contents are delivered through the digital broadcast link after being scrambled by the conditional access system. Authorization management information is also delivered through the digital broadcasting network. [0004] Such as figure 1 As shown, it is a schematic diagram of an existing digital b...

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Problems solved by technology

[0016] 1. Occupy the digital broadcast bandwidth; because the authorization management information package needs to be broadcast and sent, and the authorization management information package contains the authorization management information of all users, a certain amount of digital broadcast bandwidth is occupied;

[0017] 2. The service activation speed is slow; because the authorization management information package in the symmetric service activation method can only be broadcast to all users through periodic broadcasting, it will take longer for users to receive the authorization management information, and the service activation speed is slow. Currently, it is normal It takes about half an hour to download;

[0018] 3. Increase the processing workload of the terminal, and there are potential safety hazards; the symmetric service activation method broadcasts and sends the authorization management information package containing the authorization management information of all users, and each user extracts its own authorization management information from the authorization management information package, increasing the The processing workload of the terminal; at the same time, each user may obtain the authorization management information of other users, so there are exposure risks and security risks

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