【作者】 刘杰；

【导师】 宋彬； 郑茳；

【作者基本信息】 西安电子科技大学 ， 软件工程， 2010， 硕士

【摘要】 H.264是新一代的视频压缩标准,具有较高的压缩比和较好的网络适配性,如何将H.264视频压缩标准应用于网络视频监控系统中,成为了当今研究的热点问题。本文通过查阅H.264编解码标准文档和H.264视频实时传输负载格式文档,分析了H.264视频压缩标准的特点及其关键技术和视频网络传输的流媒体技术。设计了集视频编码、视频流化、流媒体服务器于一体的网络视频监控系统。依据视频信息的压缩、流化、传输等各个模块的工作原理,选用相应的H.264编码软件x264,MPEG4IP中的视频流化工具mp4live和视频流媒体服务器Darwin Streaming Server。通过优化x264消除快速移动物体的拖影,使其与mp4live更加高效的工作在基于Freescale i.MX27的嵌入式Linux系统上。然后移植x264、MPEG4IP中的mp4live和Darwin Streaming Server,并进行相关使用配置,实现了嵌入式网络摄像机的视频编码与流化传输功能,监控终端使用Mplayer进行监控视频的解码与播放。最后对网络视频监控系统的视频网络传输进行测试,结果表明,该系统的视频监控画面清晰、流畅,实时性强,可广泛应用于视频监控产品中。更多还原

【Abstract】 H.264 is the new video compression standard and has a higher compression ratio and the better network suitability. How to use the H.264 video compression standard in the network video surveillance system has become hot topic now.This paper through consults H.264 standard documents and RTP payload format for H.264 video to analyze the H.264 video compression standard’s characteristic and key technologies, and analyze the technology of streaming media. Network video surveillance system, combining video code, video streaming, streaming server in one, is designed. Principle of video compression, streaming and transmission is based on to select x264 for H.264 encoding, mp4live of MPEG4IP for video’s streaming and Darwin Streaming Server for streaming media server. By optimizing x264 to eliminate shadow of moving objects, x264 has better cooperation with mp4live. In the following, x264, mp4live of MPEG4IP and Darwin Streaming Server are chosen according to system which is designed. Embedded IP Camera’s function is achieved by porting x264, MPEG4IP and Darwin Streaming Server to embedded Linux system based on Freescale i.MX27 and configuring them. The monitor terminal uses Mplayer to decode and play H.264 video.Finally, network video surveillance system is tested, the result show that network video surveillance system have clear video, fluent transmission and is real-time, and it can be widely used in production of video surveillance.更多还原