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Method, system and equipment of protecting mobile multimedia service

A mobile multimedia and service protection technology, applied in broadcast transmission systems, broadcast-related systems, electrical components, etc., and can solve problems such as unsupported conditional access (CA)

Inactive Publication Date: 2008-04-09
INNOFIDEI TECHNOLOGIES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, if CMMB cooperates with CMCC (China Mobile Communication Corporation, China Mobile) in the cooperative operation mode, the user terminals owned by these operators may not support the service protection technology of conditional access CA, but only support the protection method of the operator itself

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  • Method, system and equipment of protecting mobile multimedia service
  • Method, system and equipment of protecting mobile multimedia service
  • Method, system and equipment of protecting mobile multimedia service

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Embodiment Construction

[0076] The present invention provides a method for mobile multimedia service protection. In an environment where the CMMB network is used as a mobile multimedia broadcast channel and other networks are used as uplink and interactive channels, two or more service protection systems coexist. The specific flow of the method is shown in Figure 3 shown, including the following steps:

[0077] Step s301, the network side device generates at least two kinds of encrypted information according to the same control word, encrypts the same mobile multimedia service with different encrypted information, and adds a system identifier to generate a multiplexed frame and sends it to the terminal side device. For mobile multimedia data (audio and video services, data services), the same control word (CW) generator and scrambling code generator are used, and the general scrambling algorithm is used to scramble the signal. The difference between different service protection systems is Starting fr...

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Abstract

The invention discloses a system for mobile multimedia service protection, which comprises a network side device for generating at least two encrypted messages based on the same one control word, encrypting the same one mobile service by using different encrypted messages, and generating a multiplex frame added with the system identifier and then sending the frame to a terminal side device; a terminal side device for receiving the multiplex frame from the network side device, obtaining a decryption message of the device based on the system identifier in the multiplex frame, and decrypting the encrypted data in the multiplex frame by using the decryption message to obtain the mobile multimedia service. The invention also discloses a method and a device for the mobile multimedia service protection. The invention can efficiently solve the problem of coexistence of different service protection modes in a CMMB system, and enable each terminal to descramble the scrambled audio / video and data services flexibly and correctly according to the service protection mode supported thereby.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method, system and equipment for protecting mobile multimedia services. Background technique [0002] For mobile multimedia services, the existing service protection technologies mainly include the following categories: service protection based on CA (Conditional Access), service protection based on SIM (Subscriber Identity Module, Subscriber Identity Module) card; service protection based on DRM (Digital rights management, digital rights management) service protection and IPSec-based (IP Security, IP security) service protection, etc. [0003] In the existing communication system, it includes a variety of operating systems, such as: CMMB (China MobileMultimedia Broadcasting, China Mobile Multimedia Broadcasting System) and independent operating systems of radio and television operators, among which CMMB is for mobile phones, PDA (Personal Digital Assistant, person...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04H60/14H04H20/57H04H20/72H04H60/91
Inventor 张辉王西强杨君云孙家旺
Owner INNOFIDEI TECHNOLOGIES INC
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