| DVB条件接收系统结构研究 |
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| 引用本文： | 朱倩,黄焱.DVB条件接收系统结构研究[J].中国有线电视,2005(2):126-129. |
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| 作者姓名： | 朱倩 黄焱 |
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| 作者单位： | 信息工程大学,河南,郑州,450002 |
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| 摘 要： | 条件接收系统(CAS)是数字视频广播实现保密业务安全传输的重要组成部分,它通过加解扰、加解密、数字视音频压缩、复用、智能卡、机顶盒等技术,实现对用户的授权控制和授权管理.研究了CAS的结构框架和工作原理,分析了同密、多密的工作模式,并对系统中的加密算法进行了探讨.
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| 关 键 词： | 数字视频广播 条件接收系统 同密 多密 加密算法 |
| 文章编号： | 1007-7022(2005)02-0126-03 |
| 修稿时间： | 2004年11月17 |
Research on the Structure of DVB Conditional Access System |
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| ZHU Qian,HUANG Yan.Research on the Structure of DVB Conditional Access System[J].China Cable Television,2005(2):126-129. |
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| Authors: | ZHU Qian HUANG Yan |
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| Abstract: | Conditional access system(CAS) is an important part to achieve secret and security transmission in the Digital Video Broadcasting(DVB). It realizes subscribers' authority and management with technologies of scrambling/ descrambling, encryption/decryption, digital video/ audio compression and complex, smartcard, STB and so on. The structure and principle of the CAS are introduced, application models of simulcrypt and multicrypt, used in CAS are analyzed. Besides,encryption arithmetic in CAS is discussed in this paper. |
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| Keywords: | digital video broadcasting(DVB) conditional access system(CAS) simulcrypt multicrypt encryption arithmetic |
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