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Condition reception assembled controlling method without addressing authorization

A combined control and conditional access technology, applied in electrical components, user identity/authority verification, analog security/charging systems, etc., to achieve the effect of overcoming bandwidth bottlenecks

Inactive Publication Date: 2005-02-23
大庆英辰创新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the use conditions of the corresponding keys in the common conditional access smart card are controlled by its internal static state information, and it is possible to change only after receiving the personalized authorization management information EMM

Method used

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  • Condition reception assembled controlling method without addressing authorization
  • Condition reception assembled controlling method without addressing authorization
  • Condition reception assembled controlling method without addressing authorization

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Experimental program
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Embodiment Construction

[0041] figure 1 Among them, the dynamic control information is generated at the front end of the broadcast, and the plain text TS such as video, audio, and data is scrambled through multiplexing and scrambling devices to form a scrambled TS, and then the scrambled TS and the ECM generated by the CA module, The ciphertext dynamic control information generated by EMM and SI generator is transmitted to the receiving terminal through various transmission forms such as ground, cable and satellite. The information generated by SI generator and CA module is related to the content of program information management. The user management system and CA The ECM and EMM generated by the module are related. The smart card of the authorized receiving terminal decrypts the ciphertext dynamic control information through the demultiplexer and the decryption module to obtain the plaintext dynamic control information, and uses the plaintext dynamic control information to complete the descrambling ...

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Abstract

The method includes following steps: the entitlement control message (ECM) transmitted by broadcast front-end equipment includes composite control message about conditional access; the composite control message is composed of non-randomness conditional message and randomness message to construct the data relating to cryptographic algorithm of scramble / descramble control word; the conditional message is a conditional reception control message relating to active reception time field or time quantum; the smart card in the reception end uses cipher key and conditional message in composite control message to compare and renew the relevant control message in smart card, and decides if the entitlement control message or composite control message are processed by using a certain kind cipher algorithm; the correct scramble / descramble control word is obtained to make descrambling for received scramble / descramble transport stream (TS).

Description

technical field [0001] The invention belongs to the field of television broadcasting conditional access, in particular to a combined control method for conditional access without addressing authorization. Background technique [0002] Conditional Access (CA) is described in the "Digital TV Broadcasting Conditional Access System Specification" (draft for comments) issued by the State Administration of Radio, Film and Television: "Conditional Access refers to a technical means that only allows authorized Unauthorized users cannot use this service. The conditional access system is the system that realizes this function.” The so-called service generally refers to the video, audio, subtitles, and other data that are provided to users as programs. The basic data transmission stream TS (Transport Stream) composed of etc. [0003] The CA conditional access system is a comprehensive system that integrates a variety of technologies, including system management technology, network tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/28H04L9/32H04N7/16H04N7/24
Inventor 王耀
Owner 大庆英辰创新科技有限公司
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