Research And Design Of Networkvideo System Based On Embedded Linux

With the computer network technology, communication technology and digital videocompression technologies become more sophisticated, remote video surveillancetechnology has developed rapidly. Because of its information-rich, content intuitive, easy touse, video images are widely used in industrial control, traffic control, security systems,community safety and other areas.This article combines the video image data acquisition technology, data compressionand TCP/IP network data transmission technologies, designed and implemented the remotevideo monitoring system based on B/S mode and S3C2440as core hardware platform,including: Firstly, the overall hardware and software system design are given, U-boot hasbeen modified and transplanted for the hardware; the transplantation of the compiler andproduction of Linux kernel, file system of YAFFS also be studied in detail; has beenachieved V4L2video image data acquisition, video image data compression, networktransmission of video data; analyzes the method of video retrieval and hereby bringsforward a technique of video label, which takes the motion image as an event label andthen find out the position of the event in the video file accordingly.System consists of two parts: server and video surveillance client. Video surveillanceserver uses an embedded Linux operating system and Samsung S3C2440A processor as thecore platform software and hardware systems. With the IE browser, client-side access tovideo surveillance servers and sent video surveillance requests to the server. After videosurveillance server receives a client request, the system uses theV4L2Linux video interfaceto capture image data, and then the video data using JPEG compression, and finally thecompressed video data is transmitted through the Internet to video surveillance client. Withthe IE browser, the client receives and real-time monitors remote video images.The modular design approach is used in the system which makes the design morecompactable, efficient, and ease to upgrade. Experimental results show that compared totraditional video surveillance system, the system has outstanding advantages in processingspeed, stability, real time, Etc, to achieve the expected project design goals.