Distributed VGA Display Technology

"Distributed VGA display technology" is a portable embedded VGA display device, and it also offers the Fast networks and digital signal processing functions.,It can show and control the VGA image without using computer or display card. The mainly application of the system is to show the advertisements or the attention information in public place such as the super market, the station or the air station. And it can also be used in the workshop to display the operating information of the production or in the daily life as a multimedia electronic calendar system. The display of three different resolutions of images 1024*768(XGA), 800*600(SVGA) and 640*480(VGA) has been designed and realized.I Program the DM9000A Driver and TCP / IP protocol .TCP / IP protocol is a high-speed real-time validation of the agreement, and it can achieve long-distance communications, computer control can achieve a number of embedded devices, each device exclusive IP and a physical address. It can achieve digital signal processing, network control , Transmit data, video, and so on.The main work includes:1, Based on the study of the theory about the VGA display system, detailed project has been put forward.2, Structures distributed VGA display technology hardware structure, able to conduct real-time images of the VGA display and rapid realization of the adjustable resolution. Design of a programmable logic device CPLD in VGA display timing method.3, One of the high speed one dimension IDCT algorithms has been adopted. Only 29 times of multiplication and 11 times of addition are needed in the one dimension IDCT transformation of 8 bits, which improved the decode speed of the JPEG and further more, the real-time performance.4, I design the Distributed VGA display technology embedded software and PC software. WINSOCK programming using the PC network control process. Large capacity SDRAM, FLASH store data. DM9000A controller can achieve 100 M-duplex transmission.