With the advancement of computer process capability, development of high-speed network technology and appearance of new multimedia device and compress technique, interactive video services, such as video-on-demand(VOD), get more and more notice.

• 随着计算机处理能力的提高、高速网络技术的发展、各种数字音频视频设备以及数据压缩技术的不断出现,视频点播(VOD,video-on-demand)等交互式视频服务受到了越来越多的关注。