The system also communicates with cas and bank system on tcp / ip 整个系统还利用tcp / ip协议与条件接收系统和银行系统进行通信。
Chapter 4 describes the implement of manage system which is closely related to cas 第四章介绍了与条件接收系统密切相关的管理系统。
Ca ( conditional access ) is a future function and we plan to use our own ca system Ca (条件接收)功能为本系统预留实现的功能，初步计划使用自行设计的ca系统。
Chapter 1 gives a brief description of digital television broadcase and conditional access system 国内电视广播的数字化已经启动，研究数字电视条件接收系统显得特别有意义。
Conditional access system is implemented to ensure that only the entitled customers can watch the programs 数字电视广播中采用条件接收( ca )系统来保证只有被授权得用户才能看到节目。
For implementing of these services , one key question is selecting a secure , open conditional access system 为了确保这些新业务的实现,一个重要的问题是选择一个安全、开放的条件接收系统。
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。
It includes the mepg2 demodulation module , the numeral regards the audio frequency coder and the conditional access module and so on 它主要包括mepg2解调模块、数字视音频编码器和条件接收模块等。
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。
