Abstract: In view of the current low bandwidth of 2 & TImes; 1 Gbit / s network LED display controller, a IEEE Gigabit IEEE 102.3 standard based on 10 Gbit / s Ethernet is proposed, which uses twisted pair as the transmission medium and transmission distance. Design scheme of a single-card network cable control system for ultra-high-definition LED displays up to 100 m. Audio and video adopt HDMI 1. 4a / DVI dual input, communication adopts 10 GbE LAN / WAN PHY, information processing adopts mid-to-high grade field programmable gate array (FPGA) with XAUI / SGMII interface, and the display display distribution adopts Gigabit Network matrix shunt technology to realize 4K2K, 3D display and synchronous audio playback of LED display controlled by a single card.
introduction
At present, many companies have launched 4K2K (physical resolution 3840 & TImes; 2160 or 4096 & TImes; 2160) high-end graphics cards, ultra-high-definition TVs, naked-eye 3D TVs and projectors. Whether in the horizontal or vertical direction, the 4K2K specification is twice the resolution of the current mainstream full HD display device 1920 & TImes; 1080p, and the total number of pixels reaches more than 8 million, which is 4 times that of full HD. In the field of LED full-color display, especially in the application of stage background screens and square advertising screens, due to its infinite splicing characteristics, more than 4K2K high-end LED displays and 3DLED displays have already come out. However, the current mainstream LED display control system in the market is mainly the DVI input dual-port Gigabit network mode, and the long-distance is a single channel 1-3. 125Gbit / s optical fiber communication mode. The 8-bit color scale input supports the largest single board The resolution can only reach 1280 × 1024 (60 Hz, uncompressed). To support ultra-high resolution display or output above 30-bit color gradation, multi-card or multi-controller systems must be used, together with expensive video splitting splicers. Obviously, the current LED display control system, especially the short-distance dual-port Gigabit network control system that has been used for many years, has lagged behind the development of video and communication technology, and cannot meet the higher demands of the market and users. To this end, on the basis of the development of the previous generation dual-port Gigabit network LED controller, a HDMI / DVI dual input ultra-high-definition LED display single-card network cable control system was designed, which greatly improved the traditional LED display controller. Bandwidth, features and cost-effectiveness.
1 Overall design
The ultra-high-definition LED display single-card network cable control system includes two parts: sending and receiving. Figure 1 shows the design of the transmitter control logic, including HDMI input port, DVI input port, USB interface, ADV7619, CP2102, FPGA, DDR, FLASH, PCIe socket, peripherals and high-speed communication logic.
Figure 1 Schematic diagram of transmitter logic design
Figure 2 shows the design of the receiver control logic, including high-speed communication logic, FPGA, 3 × 4 port 1Gbit / s PHY, 12 × integrated RJ45 socket, DDR, FLASH, audio output and external devices, including high-speed communication logic and transmitter Exactly the same.
Figure 2 Schematic diagram of receiver logic design.
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