| Video central control platform is one of the important equipment for TV production.In TV production,the working stability of video central control platform directly affects the security of video broadcast.In this paper,ARM as the main processor and CPLD as the coprocessor are selected to design and implement video central control platform with stable performance and high safety coefficient.The main contents of this paper include:(1)Understand the design requirements of video central control platform,develop the design scheme,and complete the overall design block diagram of the system.(2)According to the overall design scheme of the system,using ARM as the main processor and CPLD as the auxiliary processor,completed the circuit principle design of video central control platform and PCB drawing,and realized the complete design of video central control platform.(3)Completed the friendly interface design according to the functional requirements,and realized the development of LCD interface software logic.(4)To Complete the T-Bar,rocker,FLASH,the design of the sampling chip,the underlying drivers,analyzes the structure of the development of USB host system,initialization of USB host,USB enumeration of initialization and control of USB transmission mode,based on the FAT file system has realized the USB device to read and write,completed...the development of Ethernet interface program,realize the data communication between MB front-end ports.Innovation of this paper:(1)In Order To improve the accuracy of the AD sampling module of the system,weighted iterative filtering algorithm is adopted.Based on the analysis of test data,the accuracy is as high as 98%.(2)From the point of realizing the robustness and self-repairing ability of system software design,Pamas algorithm is adopted.According to the test data,the probability of abnormal occurrence without Parnas algorithm is 0.875%?1.5%,while the probability of abnormal occurrence with self-inspection algorithm of software system is 0.15%?0.25%. |
PDF Full Text Request