Design scheme of ultra-high-definition LED display single-card network cable control system
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.
Analysis of advantages and disadvantages of 4G industrial routers
First, what is the classification of industrial routers?
Industrial Router (a communication device that can be divided into 2G routers, 2.5G routers, 3G routers and 4G routers according to network standards.
For users, you can communicate with the Internet by setting a default gateway on your PC or network device. In fact, the default gateway configured for network devices is the packet export for network devices. After the packet is sent to the Ethernet port of the router, the router performs the next job, so the router is an Internet relay.
Second, how do industrial routers work
So how does the router forward the packet? Just like getting somewhere, you need to place a route. This route is a routing table. This routing table contains all the destination network addresses owned by the router, as well as the best path to reach those networks through the router. This is because there is a routing table, so the router can forward packets according to the routing table. That's how routers work.
Understand what is an industrial router and how it works, it is not difficult to understand the advantages and disadvantages of the router. Here we focus on the advantages and disadvantages of 4G industrial routers.
Third, the advantages of 4G industrial routers
For networks interconnected via single-protocol industrial-grade wireless routers, the same or different protocols can be used at layers 1-2. Layer 3 uses the same routable protocol and requires the same or compatible protocols at layer 4 and beyond.
Industrial routers can perform complex routing calculations and are suitable for connecting three or more large networks with complex network topologies.
Industrial-grade routers can isolate broadcast storm information in the source network, thereby reducing and mitigating the impact of broadcast storms.
Multiprotocol industrial wireless routers can be used as network interconnection platforms using different communication protocols because they can connect to the network using different communication protocols.
The entire network router can also be used as a bridge to handle non-routable protocols.
Industrial 4G routers enable you to isolate unnecessary communications so that the interconnected network maintains its own area of independent management and control, thereby improving network security performance. Therefore, industrial-grade 4G routers are commonly used as firewalls to restrict access to the internal and external networks (Internet) of the LAN, as well as the internal areas of the LAN, and act as network masking.
It can provide reliable transport and prioritization services, and industrial LTE routers do not need to maintain a persistent connection between networks that communicate with each other.
Complete Netcom router network segmentation improves network performance and reduces host load.
Third, the advantages of 4G industrial routers
High price
When installing an industrial LTE router, it is difficult to install and maintain due to the large number of initial configurations
If you spend more time processing, the transmission performance of the entire network of the industrial router will decrease.
Unlike Bridges, routers across industrial networks are protocol-related. Each advanced protocol used for network connectivity must be configured separately, and an industrial-grade network-grade router with a separate protocol for each protocol must be provided.
Industrial Netcom routers do not support non-routed protocols, so when interconnecting multiple networks, there are restrictions on the protocols used by the connected networks.
4G Industrial Router,Sim Router Industrial,Industrial Lan Router,4G Modem Router Industrial
Shenzhen MovingComm Technology Co., Ltd. , https://www.szmovingcomm.com