Research Of Embedded Video Monitoring Technology

With the development of technology and the advancement of people's living standard, video monitoring system is widely used in the industry, security field and daily life. Video monitoring technology, combining the technology of computer, multimedia, telecommunication and network, is one of the focuses that is being researched and it has a extensive future and practical value. With development of the embedded system and the degree of the integration of the chips, embedded video monitoring technology is getting more and more attention and being applied in many occasions.Wuhan Routon Electronic Company's embedded video monitoring system is based on ARM processor EP9315 and TMS320DM642, and uses embedded Linux operating system. In the system, video capturing module uses the video decoder TW2814. In order to capture better data, the control of TW2814 is needed. Through the imitation of I2C bus, the driver provide the application with the function of the setting of capturing parameters such as hue, color saturation, contrast and brightness, and the check of video losing.In the system that consists of two processors, data transfer in the two processors is indispensable. Through the HPI port provided by DM642, the read and write operation can easily be implemented. In order to achieve the transfer, HPI driver is programmed. Also, the performance of different interfaces in the driver is analyzed and how to start DSP by using HPI driver is discussed. The system needs the support of graphic system to make users control it conveniently. Therefore, display driver is devised and implemented through extending HPI driver. In this way, users can configure and manage the system through graphic system, increasing the degree of convenience of users'interacting with the system.