基于IP技术的新型数字电视前端的研究与构建  

Study and Building of IP Technology-based New Type DTV Headend

作　　者：王伟 徐军 

机构地区：[1]南京广电网络公司传输部

出　　处：《广播与电视技术》2005年第12期67-70,15,共4页Radio & TV Broadcast Engineering

摘　　要：随着数字电视内容的增多和业务的扩展,传统的数字电视前端在功能和扩展能力等方面面临一些问题。面对数字电视发展的迫切要求,南京广电网络公司积极研究和分析新一代数字电视的传输技术,构建了新一代基于IP技术的多功能、集成式数字电视前端,为广电网络多功能业务的开展提供了平台。The DTV headend system is the basis on which the DTV services can develop and operate. However, with the increased and expanded DTV program content the lack of functions and expansibility of the traditional headend is becoming more and more obvious. A new idea of building a new generation IP technology-based multifunctional, integrated DTV headend is proposed through careful analysis of new requirements of transmission platform in DTV development and combination of IP technology and DTV technology. Key technologies and building scheme of new type headend are introduced in detail on the basis of comparing differences between the traditional and new type headends.

关 键 词：数字电视前端 统计复用 MPEG over IP 媒体路由交换 码率转换 

分 类 号：TN943.6[电子电信—信号与信息处理] TP393[电子电信—信息与通信工程]