条件接收系统

• There maybe several ca systems ( cass ) in a simulcrypt cas . each cas manages its subscribers independently
  同密的核心在于其多个条件接收系统（ cas ）可以共存，每个cas分别管理自己的用户群。
• Finally , the system test content for serial conditional access and the solution for the problem in test are given
  最后文章给出了串口条件接收系统测试内容,及测试过程中所遇到问题的解决方案。
• But at present in china , the binding of set - top - box with ca system is impeding the development of domestic dtv industry
  但目前国内的机顶盒与条件接收系统绑定在一起,限制了中国数字电视产业的发展。
• Then paper analyses the working theory of normal conditional access system , and gives the realization frame for conditional access system
  随后文章分析了一般条件接收系统工作原理,给出了条件接收系统的实现框架。
• Conditional access is the process of determining which individual digital receivers shall be able to deliver particular broadcast programs to end users
  加扰系统对其业务数据进行加扰处理，是条件接收系统的核心技术。
• The development of conditional access system with our own ip is the key aspect for rapid acceptance of digital tv in our country
  开发具有我国自主知识产权的有条件接收系统( conditionalaccess )是推动,保证这种良好发展的关键
• Chapter 3 describes detailedly an advanced solution of conditional access system , including the details of scramble / descramble and encrypt / decrypt
  第三章介绍了一种多层加密条件接收系统的详细设计方案，包括加解扰系统、加解密系统。
• Chapter 2 describes all aspects of conditional access systen in dvb architecture including struct , principium , encrypt arithmetic , dvb simulcrypt and common interface
  第二章在dvb规范下论述了数字电视条件接收系统的结构和原理、加密算法、 dvb同密规范和通用接口规范。
• Determine scrambler and unify data interface through the adapter layer , to enable different type of conditional access system to set the descrambler by retrieving the descrambler code
  通过适配层对加扰层进行判断并统一数据接口,使不同的条件接收系统都能成功提取解扰字对解扰器进行设置。
• But this will not become reality without the surport of another technology - conditional access system . conditional access system guarantee that only those entitled costomer can access services
  然而如果没有另外一项重要的技术?有条件接收系统技术的保障，新的业务不会变成现实，因为电视运营商不愿意做没有回报的投资。