频道切换

首先，我们介绍基于传统IP组播的IPTV系统中所碰到的频道切换问题以及频道切换时延的构成。

First , we introduce the channel zapping in contemporary IPTV system based on IP multicasting .

然后着重研究和分析了层叠组播网络中不同信令流程对频道切换时延造成的影响。

After that , we demonstrate the network architecture and signaling procedure in overlay multicast network and discuss their influence on the channel zapping delay .

VIDEOoverIP固有的不稳定性和有时就像是频道切换这样简单的情况都会对IP网络造成问题。

Video over IP is inherently unreliable and something as simple as channel surfing can become a problem on an IP network .

组播环境下IPTV快速频道切换方法

An IPTV Fast Channel Change Scheme in Multicast Environment

基于EPON的网络电视传输系统的频道切换

Channel Change of Web Television over EPON Transmission System

从目前IPTV业务的试运营情况看，它在图像清晰度、唇音同步、频道切换时间、频道数目等方面还较有线电视网有一些差距。

Judging from the current test operation of the IPTV business situation , it still has a few gaps comparing with the cable television , for examples , image clarity , mouth shape and voice synchronization , channel switching time , the number of channels .

提出基于EPON的网络电视传输系统的频道切换机制，给出了利用IGMPSnooping组播技术在EPON系统中实现网络电视频道切换的方法与步骤。

In this paper , a scheme of channel change based on web television over Ethernet PON is proposed . The method and steps for realizing channel change with multicast technology using IGMP snooping are given in the system of web television over EPON .

浅谈蜂窝区移动通信系统中的频道切换

Handover in Cellular Mobile System

机顶盒中的客户端软件降低频道切换的时间：用户可享受和有线电视一样的观看体验。

The client software in STB shortens the time for changing channels to : even if different client applications are used , users can still enjoy the same experience same as cable TV .

最后，我们在实际网络中进行了实验，测量了不同信令流程所引入的网络时延，并参加了一次1040个并发用户的大规模测试来评估层叠组播网络对整体频道切换时延性能的影响。

Finally , we measure the network delay introduced by various signaling procedures on the testbed and present statistical results by 1040 concurrent users testing to evaluate the impact of overlay multicast network on the performance of the overall channel zapping time .

支持IPTV用户扩容的频道快速切换设计

Design of Channel Zapping Supporting IPTV Subscriber Increasing

直播型IPTVQoS指的是直播类IPTV业务的非功能属性，如频道启动时间、频道切换时间，不同节点之间播放进度的同步性等等。

Live IPTV QoS is the non-functional attributes of live IPTV service , e.g. channel start-up time , channel change time , play-out progress synchronization of different terminals .

一些电视机遥控器有一个标为跳转的功能，它在当前频道和先前的频道之间切换&这对于同时看两个节目来说非常方便。

Some TV remote controls include a function labeled Jump , which switches between the current channel and the previous channel & very convenient for viewing two programs concurrently .