一种简化的分布式视频点播系统设计  

A Simplified Design of Distributed Video-on-Demand System

作　　者：王结太[1] 杨艺山[2] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710072 [2]温州大学信息科学与工程学院,浙江温州325035

出　　处：《计算机仿真》2005年第11期154-156,204,共4页Computer Simulation

摘　　要：随着网络技术和数字视频压缩技术的不断发展,视频点播系统取得了长足发展,在一定程度上满足了用户的需求,但是问题仍旧很多。该文提出了一种具有良好扩展性的分布式视频点播系统(DVODS)模型,将整个系统在组织上分为三个部分:视频服务器、管理服务器和客户端,能有效地在较大地域内为庞大的用户群提供点播服务。这种模型采用中央调度、多个视频服务器协同工作的解决方案,能够适应大规模的视频点播服务,不仅可以提高系统的容量,而且可以真正地提高服务质量,减少用户等待时间。当系统覆盖地域较大时,这种方式可以有效地降低系统对于主干网络带宽的要求,同时有利于系统的扩展和节目管理。The development of high speed networking technologies and digital compression video techniques has made great progress of Video - on - demand system, which meets the users＇demand to a certain extent. But there still exist many problems. This paper puts forward a new model of DVODS （ Distributed Video - On - Demand System） with flexible expansibility, scalability which divides the whole system into three parts - - - Video Server, Management Server and Clients and can provide the enormous clients with Video - On - Demand service effectively in a comparatively wider terrain. This model adopts a new solution scheme of center scheduling, many video servers working together, and it can adapt a large scale of VOD services. Not only does this schema improve the capacity of VOD system but also decreases the latency time of the users. When the covered terrain by the system extends, this method will help reduce the bandwidth demand of backbone networks successfully and be favor of system expansion and program management simultaneously.

关 键 词：分布式视频点播系统 视频服务器 管理服务器 服务质量 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]