视频点播论文：基于P2P的视频点播系统设计与实现

1、视频点播论文：基于P2P的视频点播系统设计与实现【中文摘要】随着计算机网络和多媒体技术的发展,人们对网络视频点播的需求越来越高,高清、流畅和互动已经成为人们对视频点播的要求,在传统的C/S模式的视频点播系统中,客户终端要观看视频都需要依赖中心化的视频服务器,而且对带宽的要求越来越大,视频服务器就容易成为网络的瓶颈,当网络规模越大时,服务器的负担就会越重,一旦服务器崩溃,整个网络就会瘫痪。另外由于服务器的能力有限,往往不能及时地对每一个客户端的请求作出响应,因此会造成资源利用率低下。而P2P网络中没有中心化的服务器,不存在系统瓶颈,每个节点既充当客户端又充当服务器端,因而具有很高的资源利用率。本

2、文所设计的基于P2P的视频点播系统包括后台服务和前台用户两个主要模块。后台服务模块主要包括:点播管理、视频内容服务、目录服务器和用户账户服务器等模块。在服务器端通过以上几个模块,实现视频点播节目和用户账户的统一管理,直接为认证用户提供视频数据资源,对整个P2P点播系统中有效结点进行有效调度,协助快速构建P2P网络,为视频点播系统提供良好的平台环境。前台用户模块主要由客户端和基于浏览器的页面点播两部分组成。客户端是指用户播放器,用户通过播放器可以直接观看后台内容出来的点播节目,而基于浏览器的页面点播则是可以通过浏览器直接在网页中观看本系统内容的P2P视频点播节目。通过基于P2P的点播系统研究,实

3、现一个可承受大量并发用户的P2P视频点播服务,解决由于当前带宽紧张给用户方实现网上视频点播带来的限制问题,从而提高用户观看视频的流畅性。【英文摘要】With the development of network and multimedia technique, the demand of people on the network video on demand is more and more high.High definition, fluency and interaction have become the requirements of people to video on de

4、mand, in the traditional C / S model of video on demand system, client terminal to watch video need to rely on the center of the video server, and the higher bandwidth demand, the video server the easilier becomes the bottleneck of network, when the network size is large, the burden on the server wi

5、ll be more heavy, once the server is crash, the entire network will be paralysis. In addition the servers capacity is limited, often cannot respond timely to every client, it will cause the utilization rate of resources is low. While the P2P network does not have a centralized server, and the bottle

6、neck of the system is not exist, each node acts as both a client and a server, thus it has higher resource utilization rate.The VOD system based on P2P services designed by this paper includes background service and upstage user two main modules. The background service module mainly includes: bunch

7、planting management, video content services, directory server and user account server module. In the server through the above modules to realize unified management of both dibble seeding program and user account ,directly provide authenticated users with video data resources, efficiently schedule ef

8、fective nodes in the whole P2P system ,rapidly help to construct P2P network, provide a good platform environment for the video on demand system. The upstage user module mainly make up of a client and a web page dibble seeding based on the browser two parts. The client is a user player, users can di

9、rectly watch the program from background content, and the web page dibble seeding based on the browser supply users with direct P2P video on demand program through the browser in this system.Through the research of VOD system based on P2P, to realize a server which can carry a large of concurrent users, to s