探讨了图书馆开展VOD服务的必要性，对如何在图书馆建立VOD点播系统进行了详尽的阐述，为图书馆建立VOD点播系统提供了必要的参考信息。
This paper probes into the necessity of developing VOD service in library, expounds in detail how to construct VOD in library, and provides some necessary reference information for constructing VOD.
应用服务器是视频点播系统的信息发布平台和系统与用户的互动平台。
Application server is an information release platform of VOD system as well as an interactive platform between the whole system and the users.
它是一种双向不对称的服务，从视频服务器向用户端的视频数据传输远远大于相反方向的点播请求信息数据传输。
It is a two-way asymmetry of services from video server to the client's video data transmission outweigh the opposite direction of vod request information data transmission.
视频点播服务是一种新的信息服务。
The value-added service of Video-On-Demand is a new information service.
视频点播服务是一种新的信息服务。
The value-added service of Video-On-Demand is a new information service.
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