Video Wall Controller Solution

With the development of information technology worldwide, the use of centralized management methods of information technology to coordinate the centralized interactive expression of information will make the management work more rigorous and effective, and the service will be more convenient and efficient. The large-screen display system is the most advanced video wall in today, and the ultra HD image information centralized control and display system has been widely used in various fields of China's national economic production.

Video wall control system has been widely used in exhibition halls, sports venues, news centers, TV studios, meteorological stations, railway stations, airports, entertainment plazas, military operations command centers, traffic command systems, public security 110 command systems, power dispatching, flood control dispatching , shopping centers, banks, outdoor advertising, control rooms, etc.

The main features of the video wall controller:

(1). Information reception
The video wall controller must not only receive VGA, RGB, network computer information, but also receive wideband voice and video signals, and can perform appropriate information conversion as needed.

(2). Information display
The video wall controller can publish shared information in the form of multimedia and can display situation, text, table and video image information in different modes according to the divided areas. The required situation is clear, high quality, high resolution, and the text and image display are clear and stable.

(3). Preview, camera, and switch
In order to ensure the accuracy and quality of the projection display information, the system must have a preview function for pre-audit of the image. A video camera should be installed in the display hall to extract video images of the management control mechanism. The system should have a switch display function to meet the needs of multi-channel information display.

(4). Video conference call
The video wall system can use the monitoring, preview, switching, communication and terminal control equipment to maintain video communication with relevant parties, and can hold a video conference call at any time.

(5). Video conference call
The video wall display can use the monitoring, preview, switching, communication and terminal control equipment to maintain video communication with relevant parties, and can hold a video conference call at any time.

1. Considering the stability of the system, the image processing device and the edge fuser adopt full hardware architecture technology, no CPU and operating system, no operating system support, power on, high stability, no risk of virus infection, start Time is less than 20 seconds, multi-bus parallel processing, powerful processing;
2. It can work continuously for 24 hours and 365 days. Any power failure will not cause any damage to the system.
3. Inputs and outputs, each edge fuse supports at least 4 RGB signal inputs, three composite video inputs
4. The system can input RGB signals with a resolution of at least 3072 × 1536
5. Edge fuser integrates splicing control, fusion generation, sideband generation, picture segmentation, matrix signal switching, and other essential functions.

The large screen can display seven windows at the same time. Each window can be freely changed in size and position. The window can be fully screened, superimposed, zoomed and stretched, and the VGA signal window and video signal window can be superimposed at random;

6. Considering the user's convenience, the system can maintain 32 familiar scenes in advance.
7. The edge fuser supports single-pixel curve correction and supports the curved and trapezoidal correction functions of the graphic (customized).
8. Considering that the projector will have a color cast after long-term use, it is required that the edge fuse must have the function of adjusting the color of the projector.
9. Considering that the control center and the equipment are not in the same room, the edge fuse needs to have a signal preview and remote monitoring.

(1) Matrix controller
The matrix controller is used to switch any input RGB or video signal to any path of the output and directly to the projector for display. The hard splicing relies on the projector's functions to achieve splicing, the imaging speed is fast, and the matrix controller signal switching speed is also fast. Therefore, the hard splice is suitable for occasions where the display mode needs to be frequently switched. The number of channels of the input signal of the matrix controller should be determined according to the number of signal sources, and the number of channels of the output signal should be no less than the number of projectors. Usually, the matrix controller has two kinds of switching modes: the control panel and the RS-232 serial port command. Therefore, whether the product can provide the communication protocol command code is very important, which involves whether the matrix controller can realize the computer control problem. The analog signal bandwidth should be more than 300m to ensure image transmission quality. The input impedance should match the source to stabilize the image display. These parameters sometimes need to be determined by debugging.

 

(2) Video wall controller
In addition to the CPU, memory, input and output interface and operating system of the standard graphics workstation, the video wall controller also has multi-channel video and RGB input and output interfaces. It can digitize various external video and RGB analog signals and image them in the imaging device. , and then converted into the analog signal output to the big screen, and can be freely moved, enlarged and reduced on the large screen, to achieve seamless splicing of any size across the screen and multiple windows, as flexible and convenient to operate in a large window. The process is also called soft stitching, and the video wall controller is also called a soft stitch controller.

The video wall controller provides flexible splicing and operation options for large-screen graphics display. It is an ideal choice for occasions where there are not many windows (4-6) and only changes the display content and change the stitching modeless. Due to the change of the splicing mode, the controller needs to perform conversion and calculation operations on each window. It is necessary to re-synchronize the projector, occupying a vast system resource and processing time, so that the switching time is long, and some are as long as 1 minute. In applications with high output resolution, many open windows, and frequent switching, the switching time and window opening time will be longer, and the video display will be animated. In a large management center, the number of signal sources dramatically exceeds the number of openable windows. It is often necessary to change the display mode and switch modes. Therefore, you should select a more powerful controller. According to the general feeling, the number of windows should not exceed 10. Therefore, soft stitching is suitable for occasions where the signal source switching is small. The centralized controller large-screen display system is a complex system integrating multiple media devices. It is an excellent choice for centralized control in the leadership staff, display control room and monitoring seats.

 

(3) Centralized controller
It is a middleware that controls a variety of media devices, equipped with computer hardware and a dedicated operating system, with the ability to upload standard computer programs, upload touch screen engineering programs, update operating systems, and write control programs. For the selection of the centralized controller, the control object and control properties should be clearly defined first. In the large-screen display system, it is generally necessary to switch control of RGB, video, and audio signals, shift control of lights, curtains, cameras, and power supplies, and play control on DVDs, VCDs, and decks, and accordingly select RS. -232 protocol program control, relay switch control, a centralized controller for infrared output interface. Secondly, the control terminal should be chosen. Usually, the wired and wireless touch screens are chosen as the control terminals, and the centralized controller is required to have an input interface for receiving RS-232 commands and radio signals. An excellent centralized controller should not only have a large number of standard equipment control code databases but also prepare for equipment expansion. It should also be an intelligent learning device that can quickly learn the control commands of remote control devices and supplement the shortage of databases.

Large-screen display system design Integrated integration / large-screen display system design process is actually a system integration process, which is based on the needs of various industries, a reasonable selection of a variety of technologies and products, the best configuration of various Software and hardware product resources are combined into a complete integration solution that meets the specific application needs of each seat of the management organization.

Based on the comprehensive collection of data to master the configuration, installation and testing methods of the selected products, combined with the actual use background, draw the system structure diagram, equipment layout, vertical equipment layout, cable connection diagram, mechanical processing diagram, signal name comparison After the technical data of the table and other departments are fully negotiated with the competent department of the business and the user unit, the final design plan is determined.

The design process of the large-screen display system is a process of system integration. It is based on the needs of various industries, making reasonable choices for numerous technologies and products, optimally configuring multiple software and hardware product resources, and combining them into complete An integrated solution that meets the specific application needs of each seat of the management organization.