[摘要]：网络化学习首先需要构筑一个综合的，多样化的学习资源支撑环境和平台，视音频资源作为学习知识的重要载体，具有其它资源不可比拟的优势，其地位和作用已越来越突出；在计算机网络教育中如何寻找出一种合适的视音频应用方案已是当务之急。本文即以构建一个高效率的适应网络化学习的流式视音频服务和管理系统为目的，讨论了在远程教育中引入视音频服务和管理系统的背景和意义，并对流式技术，视频服务器负载均衡技术等关键技术作了初步的介绍，在此基础上分析了构建远程教育视音频服务和管理系统的可行性以及所要解决的技术难点，提出了系统设计的可行性方案，着重介绍了系统的体系结构和系统各个功能模块的设计思路和功能特点；最后，提出了系统向广域网扩展的技术方案。
[关键词]：流媒体 负载均衡 传输协议 服务器集群 视音频服务 流服务平台
Abstract:The first important thing in e-Learning is to construct an integrated and multiform Supporting environment and plat of learning resources. As one of the most important carrier of knowledge, audio/audio resource have a lot of advantage comparing to other kinds of resources . It is now playing a more and more important role. To seek after an appropriate application mode in the teaching/learning process in computer networks is now a urgent affairs. This dissertation aims at constructing an WEB-based streaming audio/video service and management system for distance education. Popular streaming audio/video techniques, platforms as well as products are discussed and compared. We present the system frame after in-depth analysis of feasibility and technical difficulty, while emphasis is given to functional modules’ design and system structure. Finally, As a teaching system this system must be applied to Wide Area Network(WAN), this dissertation also designs an technique scheme applying to WAN.
Keywords: Streaming Media, Load balancing, Transmission Protocol, Server Pack, audio/audio services, Streaming Server Plat.
