The paper describes the principle of multicast and its route protocol, designs a system of collecting video data, and analyses a network of real time video data transmission.

论述了组播传输技术的原理和相关的路由协议，设计了一个视频信息的采集系统，分析了实时视频信息组播传输网络。

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The structure and the feature of the real-time monitoring system's network were analyzed, so multicast as the main communication way of the real-time monitoring system is put forward here.

因此也不能完全满足电铁分布式监控系统网络通讯的实时性要求。本文通过分析电铁实时监控系统的结构及其网络通讯的特点，提出在电铁实时监控系统中使用组播的通讯方式。

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Adopting RTP, IP multicast and JMF, we design a real-time surgery remote teaching system based on software, which is flexible and extendible.

本文采用RTP、IP组播、J MF等技术，设计出纯软件实现的实时远程手术教育系统。系统具有较好的灵活性和易扩展性。

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