有条件接收系统通过对节目信息进行加扰从而达到对用户收取收视费用。
Conditional Access System (CAS) is used to charge the subscriber for subscribing fee by scrambling the program information.
为了保护有线电视加扰系统的安全，采用了随机数的产生、数据的加密等技术。
In order to protect CATV scrambling system, random number generator and data encryption techniques are used.
该系统可以针对指定的节目信息进行加扰，提供了加扰后的TS流，并验证其正确性。
The system can scramble the information of the program selected, then provide the scrambled TS and validate the outcome.
安全性是衡量有条件接收系统的重要指标，它直接取决于所采用的加扰算法和密钥分配算法。
Security is an essential factor of CAS, which mainly depends on scrambling algorithm and key distribution algorithm.
叙述了该系统的组成及原理，并着重分析和讨论了编码方式、滤波、均衡、加扰及解扰等问题。
This paper describes the architecture and principle of DITS system. The problems about coding, filtering, equalization, scramble and descramble are discussed in detail.
EIS是数字电视前端的管理调度系统，完成产品管理、加扰器的调度、CAS的同密管理等功能。
EIS is to schedule and manage the front devices in DTV field, it can manage products, schedule scramblers, arrange CAS simulcrypt and so on.
在分析各种加解扰技术的基础上，提出了一种结构简单，成本低，性能价格比较高的电视加解扰方案。
This paper has put forward a project of scrambling and descrambling which owns attributes of simple structure, low price and high cost performance ratio.
在分析各种加解扰技术的基础上，提出了一种结构简单，成本低，性能价格比较高的电视加解扰方案。
This paper has put forward a project of scrambling and descrambling which owns attributes of simple structure, low price and high cost performance ratio. This project can be used in mini CATV net.
仿真结果表明，在AWGN加性高斯白噪声和相关瑞利衰落信道下，系统性能均有显著改进，并能有效克服GMSK信号所固有的严重符号间串扰ISI。
Simulation results show an evident improvement in AWGN and correlated Rayleigh fading channels. The severe intersymbol interference (ISI) of GMSK signals is also effectively suppressed.
加解扰的控制信息通过FSK调制后传送到用户端解扰器。
The controlling information is sent to the descrambler after being FSK modulated.
加解扰的控制信息通过FSK调制后传送到用户端解扰器。
The controlling information is sent to the descrambler after being FSK modulated.
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