嵌入式无线视频监控系统的设计与实现

针对目前视频监控系统中采用有线网络使用不便的情况或者在无线网络环境中流媒体不能实时高效传输的现象,提出了一种基于ARM平台和嵌入式Linux的无线视频监控方案.首先对Linux操作系统进行修改和裁剪,搭建起嵌入式系统工作平台,然后利用V4L提供的接口函数来实现Linux下的视频采集,对采集的视频数据采用最新的H.264视频编码标准进行编码处理,将编码后的视频数据进行RTP/RTCP(实时传输协议/实时传输控制协议)的封装并进行无线网络传输,最后在远程监控端采用DirectShow技术实现了视频解码播放.实验结果表明:在Arm-Linux平台上采用基于RTP/RTCP的H.264传输算法,获得的视频清晰流畅、失真小、延迟低,满足实时视频监控的要求.

Design and implementation of embedded wireless video surveillance system

To solve the problems of inconvenience and inefficiency in the current schemes of video monitoring system,a wireless video monitoring system was designed based on ARM-Linux.First,the Linux was altered to adapt the embedded hardware platform.Second,the interface functions of V4L(Video for Linux) were used to implement the video collecting.Then,the video data was encoded by the newest video coding standard H.264.After these,the encoded video data was packaged by RTP/RTCP(Real-time Transport Protocol) protocol and transferred from the wireless network.Lastly,DirectShow was chosen to implement the video decoding at the remote client.The experimental result shows that the video obtained has high quality of compression and little distortion,which indicates that this solution suits for real-time video monitoring.