提出一种以Nios Ⅱ软核处理器为核心,利用SOPC技术构建硬件平台,采用H.263协议压缩视频数据的网络视频监控系统设计方案；详细分析了系统的功能需求,确定了系统设计的总体方案；按照模块化的思想,设计了各个功能模块,并给出了网络芯片DM9000A电路的具体实现,利用μClinux中的TCP/IP协议栈进行数据通信,分析H.263视频编码协议基本原理,提出在硬件上实现H.263协议的设计方法;实验结果显示系统的网络视频传输速率达到25～30fps,满足实时性的要求.本设计方法灵活、成本较低、易扩展,具有一定的实用价值.%A design plan was provided tor the network video momtonng system centered on Nios II sott processor, used SOPC technology to build hardware platform, adopted H. 263 protocol to compress video data. The overall design of system was decided by analyzing the functional requirements. The function modules were designed by the thought of modularization, and the implementation of network chip DM9000A was illustrated. The implementation of information data transmission method was presented by using the μClinux TCP/IP protocol. The hardware implementation of H. 263 protocol was illustrated by analyzing fundamentals. The result shows that the transmission rate of video data is up to 25～30fps, and meets the requirement of real time. This method is very flexible, cost low, easy to expand, and has certain practical value.
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