摘要： 设计了一种适用于工业现场的嵌入式视频编码器，视频压缩按照H.264标准，在Intel 推出的PXA255 Xscale架构的处理机和源码开放的Linux嵌入式操作系统的基础上，实现了视频的实时动态采集、压缩和网络传输，介绍了系统的研制过程，给出了系统架构和关键技术。通过构建网络测试平台，将此编码器接入以太网，服务器端将接收到的压缩码流进行实时解压、回放。此编码器可用于远程视频监控系统中前端视频的实时采集、压缩和跨IP网传输。

关键词: Linux嵌入式操作系统, PXA255, Xscale架构的处理机, IP网络, 视频传输

Abstract: This paper presents an embedded video codec that can be applied to industry scene, the video compression standard is H.264. Based on the PXA255 Xscale processor of Intel and the embedded Linux operating system whose source code is opened, dynamic collection, compression and network transmission of video in real time are achieved, the research process of this system is interpreted, the system’s framework and pivotal technology are offered. By building network test platform, the codec is connected to Ethernet, and the server decoders and playbackes the received video code flow. Test result shows that this codec can be applied to collection, compression and transmission through IP net in real time of the forward-end video in remote video-supervision system.

Key words: Linux embedded operating system, PXA255, Xscale processor, IP Network, Video transmission