数字电视系统中的本地节目插播实例  

The Instance of Spotting Local Programs on Digital TV

作　　者：孙焱 

机构地区：[1]金湖县广播电视台,江苏金湖211600

出　　处：《中国有线电视》2013年第3期249-252,共4页China Digital Cable TV

摘　　要：介绍EPG原理,阐述机顶盒自动搜台过程与EPG的关系,并根据其原理讨论数字电视传输平台建设过程中如何解决本地自办节目插播的问题,由此综合分析讨论了3种节目插播方案,根据其设计要求,比较各自的优缺点,从而得出最佳方案。最后介绍如何通过PBI编码器和调制器实现本地自办节目的插播,提出2种不同配置方式。This paper introduces the principle of epg and clarifies the relation between the set-top boxs auto search process and epg. It also discusses how to broadcast local programs during the construction of digital TV transmission platform according to the principle. After comprehensive analysis, it puts forward three ways to realize program spot. Among them, one best is chosen by comparing their advantages and disadvantages ac- cording to design requirements. Finally, the paper shows how to use PBI eneoder and a modulator to realize program spot and describes these two different manners in detail for the colleagues＇ reference.

关 键 词：电子节目指南 网络信息表 业务描述表 编码器 QAM调制器 

分 类 号：TN949.197[电子电信—信号与信息处理]