Mpeg4 Embedded Network Real-time Video System Design And Implementation

Embedded Technology is the center of Interest in PC-after Era. In this Dissertation, Based on Embedded System Technology, we implement a Network Video System. This System can be used for Network Multimedia Application System. The Typical Application is Digital Network Video Camera , Digital Network Monitoring Device ,and so all. Because the Video Data is so large that it is not suitable for Network Application. So The Application needs a Compression Coding Method. We choose MPEG4 Part2 as the Video Compression Coding Method. IME6400 chip is produced by InTime Corp in Korea. It is a Real Time MPEG4 SOP@LEVEL3 and Multi-Channel Video Coding Single Chip.In this Dissertation, The CPU of The Embedded Platform is S3C2410 produced by Samsung Corp. The Extend part is included by IME6400 and its accessorial Circuit. ELinux operating system is run on the Embedded Platform. In order to let Elinux operating system call the Extend Circuit, we need Device Driver just for the Extend Circuit. Device Driver adopts Zero-Copy Technology. Zero-Copy Technology assures that at one time there only is one piece of Video Steam in the Physical Memory with no copy. It no only improves the efficiency of the usage of Memory, and also save the CPU resource of copying the Video Stream. After it, a User Application is used for Network Transport of Multimedia Information. Special RTP/RTCP Transport Protocol is adopted. In order to test the capability of the system, Based on the system, a real Application system, Network Video Real Time Monitoring System, is designed. The User just needs IE Browser to monitor the system. The Video is optional 320X240 & 640X480 pixels Picture.