基于TVOS实现IP与DVB协同快速频道切换的方案研究

Research on Cooperative Fast Channel Change Between IP and DVB Based on TVOS

频道切换时间是有线运营商逐渐关注的用户服务质量(QoE)的一项重要指标,传统采用DVB传输方式的有线数字电视直播业务频道切换时间较长,一般为1~3秒。本文对影响频道切换时间的因素进行了分析,提出了三种智能电视操作系统(TVOS)终端支持的快速切台(FCC)方案,并重点对IP与DVB协同的FCC方案的原理和实现方法以及TVOS终端的处理流程进行了阐述,最后提供了有线电视网络实际应用测试的结果比对,从而证明通过IP与DVB协同FCC方案将频道切换时间缩短为0.5秒以内,提升了频道切换速度和用户体验。

Channel switching time is an important indicator of user quality of experience(QoE)gradually concerned by cable operators.Channel switching time of cable digital TV live broadcasting service with traditional DVB transmission mode is longer,generally 1 to 3 seconds.This paper analyzes factors that affect channel switching time,proposes three kinds of fast channel change(FCC)schemes supported by smart TV operating system(TVOS)terminal,focuses on principle and implementation method of FCC scheme based on IP and DVB cooperation,as well as processing flow of TVOS terminal,finally provides results comparison of practical application test for cable TV network,It is proved that channel switching time is reduced to less than 0.5 seconds by FCC scheme of IP and DVB cooperation,and it improves channel switching speed and user experience.