摘要
考虑到开发的难易程度、生产成本和软件升级等因素,本文介绍了一种基于ARM处理器和嵌入式Linux操作系统的无线视频监控终端的设计和实现方法;分析了在嵌入式Linux操作系统下基于V4L的视频采集的新思路与基于MPEG-4的视频编码的优点,阐述了整个终端系统开发的难点及相应的解决方案;给出了无线监控终端的实现方案、视频采集模块的设计方法、XVID编码器的编码过程和MPEG-4视频编码标准在ARM平台上的优化方案。系统在ARM-Linux平台上进行了实际的视频采集及编码性能测试。测试结果表明,基于V4L的视频采集和基于XVID的MPEG-4编码的无线监控终端视频采集实时性好,压缩效率高,码流平稳,完全能满足用户的监控需求。
Considering the degree of realization,cost of manufacturing and upgrading,this paper introduces the design and implementation of wireless video monitoring terminals based on ARM and embedded Linux systems. The new idea of video capture based on V4L and the merits of video coding based on MPEG4 in the Linux systems are analysed.We described the difficulty of the whole system development and the corresponding solutions. Also, the implementation of wireless video monitoring terminals, the design of video capture, the encoding process of the XVID encoder and the optimization schemes of the MPEG4 video coding standard on the ARM platform are all given in this paper. After the actual video capture and encoding performance test based on the AMRLinux, the results show that the wireless monitoring terminals based on V4L and MPEG4 do well in realtime video capturing ,high compression efficiency and steady streams,and are fully able to meet the user’s needs on video monitoring.
出处
《计算机工程与科学》
CSCD
北大核心
2011年第1期122-126,共5页
Computer Engineering & Science
基金
2009年广西区研究生科研创新项目(2009105950810M14)
广西教育厅科研基金(200808XL128
200911XL105)
