摘要
详细介绍了地面数字电视广播中的条件接收（Conditional Access）标准，包括系统的基本原理、加密信息的设置等，并以ATSC标准的通用加扰算法TDES为例，讨论了数据加扰的基本过程及实现。
Conditional access standard for terrestrial digital television broadcast is introduced in detail， including the fundamental principle of CA system and the information of scrambling etc． At last， TDES is applied to CA system， then the basic process of data scrambling and the implementation are discussed．
出处
《电视技术》
北大核心
2001年第6期9-11,共3页
Video Engineering
