EPG在数字电视以及网络电视中的实现与比较

EPG即电子节目菜单是数字电视以及网络电视中的重要业务。简要介绍EPG系统的构成,并分析了EPG在数字电视以及网络电视中的实现方式。通过比较表明,在数字电视中,EPG采用数据传输和本地应用的方案,虽然EPG解析和显示均由机顶盒(以下简称STB)处理,但交互性较差;而网络电视(以下简称IPTV)中,EPG采用交互式方案,STB通过HTTP协议从EPG门户服务器获得EPG有关的HTML文件,交互性较强,充分体现了网络电视的优势。

Realization and comparison of EPG in DTV and IPTV

EPG is an important service in the digital television and IPTV.This paper briefly introduces the composition of EPG system and its realization methods in the digital TV and IPTV.In digital TV,people always use local application method to design EPG system.Set-To-Box analyzes all EPG data and sends them to display on TV.In IPTV,people use interactive method to design it,in which Set-To-Box gets EPG information in HTML files from EPG server.Comparing the two methods,the latter one is highly interactive and fully reflects the advantages of IPTV.