中文摘要：

为解决组播网络中基于网际互连协议的电视（IPTV）频道切换时间过长的问题,提出一种在组播环境下IPTV快速频道切换的方法.该方法利用终端的上传带宽,为其他终端提供快速的数据流,在短时间内充满频道切换终端播放缓存,可减少频道切换时间.理论分析与仿真验证的结果表明,在较高频道切换频率下,该方法用不足20%的新增带宽,使频道切换时间减小到原有的15%-45%.

英文摘要：

In order to reduce channel change time of Internet protocol television （IPTV） in Internet protocol（IP） multicast environment, a novel scheme of IPTV rapid channel change in IP multicast environment is proposed. This scheme utilizes terminal＇s upload bandwidth to supply rapid media stream rate to other terminals, and fulfills play-out buffer in channel change termianals for a short time period, so as to reduce the channel change time. According to theoretical analysis and simulation results, under a highly channel change rate, only no more than 20 % additional bandwidth is needed to reduce the channel change time to 15 % - 45 % of original multicast channel change time.