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围绕ＩＰ多播在数字视频监控系统中的实现，深入讨论了系统引人ＩＰ多播技术所涉及的一系列关键技术及其相关的实现方法．ＩＰ多播流程的建立、基于Winsock的ＩＰ多播技术的实现步骤、传输层协议的选择、网络流量控制策略以及用户权限控制的实现等技术在文中都提供了其具体的解决办法．该系统采用Digital ２１２３０芯片硬件实现音视频 ＭＰＥＧ－１标准的实时压缩，应用软件实时解压缩以及系统多功能操作等，软件基于 Windows 9x/NT平台用 Visual Ｃ＋＋开发．ＩＰ多播技术能够最大限度地利用现有带宽资源，具有广阔的应用前景．
Focusing on the realization of IP multicasting in digital video surveillance system, a series of key technologies involved in system introduction of IP multicast technology and its related implementation methods are discussed in depth. The establishment of IP multicast process, the realization of IP multicast based on Winsock, the selection of transport layer protocol, the control strategy of network traffic and the realization of user rights control all provide concrete solutions in this paper. The system uses Digital 21230 chip hardware to achieve real-time audio and video MPEG-1 standard compression, real-time application software decompression and multi-system operation, the software is based on Windows 9x / NT platform with Visual C + + development. IP multicast technology to maximize the use of existing bandwidth resources, has broad application prospects.