| With the rapid development of the computing power and storage capacity of thecomputer, the fixed size of the screen display technology and a single source of video contentcan no longer meet the growing mass of information. Information visualization as animportant part in the information construction, large-screen multi-the video informationsuperimposed fusion technology is growing demand in the field of Internet of Things,intelligent transportation networks, smart grid, and digital city construction.The Large-screen LCD display wall processing device is the research background forthis paper, designed and implemented a set of an external real-time video wall hardwaredevice. The core of the video system with Xilinx’s FPGA-XC6SLX100, equipped withMicron’s high-speed DDR2SDRAM memory chips whose highest maximum data rate is800Mbps. To improve the the splicing system’s adaptive capacity, the system supports high-definition VGA and DVI interface, providing two video fusion input channels and four videooutput channels. Gigabit Ethernet interface to transmit the video signal can also be used aftercompression encoding process. Input channel DVI supports a maximum resolution of5940×1080@50Hz, maximum VGA resolution of3840×1024@60Hz. Each output of theLCD screen has the maximum display resolution of1920×1080@60Hz.This paper mainly include VGA and other interface protocols, DDR2operating principle,high-speed PCB design, signal integrity theory, and simulation of the DDR2circuitparameters and layout with the SigXplorer of Cadence. Implement system schematic and PCBdesign using Altium Designer10development platform, and the system on chip isprogrammed by Xillinx’s ISE. Finally, the system board level debugging is processed and thesystem requirements are achieved.The system design useing a modular design concept, provides a hardware board for thevideo image shaped splicing, the fusion processing and long-distance transmission functionsand this also gives a reference for other similar design. |
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