In this paper, its consistence and implement are introduced. Firstly, PSI/SI information, which is source of EPG information, is introduced. Then the implement and related key technology of EPG system are involved.

• 电子节目指南(Electronic Program Guide,EPG)在数字电视中的应用越来越普及,首先介绍EPG 的信息来源PSI/SI信息,然后介绍EPG系统的形成和其中用到的关键技术,最后总结目前EPG系统的缺陷和不足。