Chapter 1 System Overview

1.1 Design overview

With the development of science and technology, more and more criminals' crime tools have been constantly upgraded. How to quickly locate criminals and effectively combat criminals to ensure the safety of the general public is the most fundamental task and goal of every city. As a safe city monitoring, it not only has a wide range of monitoring, many monitoring points, and a large amount of video information needs to be analyzed and processed. For a safe city, there is a strong demand for emergency command in response to emergencies. How to effectively use resource sharing, coordinate operations, and ensure the stability, security, and confidentiality of the entire system are all must be considered in the construction of a safe city command and dispatch system problem.

The large LCD splicing screen has been widely used in various fields due to its advantages of high definition, high contrast, high stability, and no radiation. A set of intelligent LCD splicing large screen display equipment has been established to monitor and display information for safe cities. This will help the city's traffic management work to be safer, more stable, and more accurate.

1.2 Demand analysis

Establish an intelligent, digital, and high-definition LCD splicing large-screen display system that can be used to display the surrounding environment and police dispatching in the public security area, and can display city security surveillance videos in the entire display system in real time. In this system design, our company designed 3 rows and 9 columns of 55-inch LCD splicing large-screen display solutions according to user needs.

Chapter 2 Detailed Design

2.1 System structure

Figure 1 System topology diagram

2.2 System composition

1) 55-inch LCD screen: 27 pieces

The ZAXTEAM 55-inch narrow-side engineering special display has higher brightness, service life, and stability than traditional liquid crystal indicators.

2) Decoding and splicing matrix: 1 set

It supports HDMI signal input/output interface, and provides an ideal image processing solution for video surveillance, server computers and other display applications on large screens.

3) Mosaic management computer + software:

1 set of ZAXTEAM video splicing management software supports multi-screen signal splicing.

4) Video transmission cable: 27 sets

The high-definition video is transmitted to the LCD screen for display.

5) TV wall: 27 modular frames

Support fixed LCD engineering screen.

2.3 Part of the TV wall effect

Note: The renderings are for reference only

2.4 TV wall effect of this project

2.5 System function

The entire large-screen display system is based on ZAXTEAM splicing management software to realize various splicing functions;

1) Single screen display: Each unit of the combined large screen displays a video picture separately, and the video signal of each unit can be switched at will (the display effect is shown in the figure below).

Single screen display diagram

2) Full screen display: The entire large screen displays a complete video image, the displayed image can be composite video (PAL or NTSC), VGA, S-Video, Ypbpr/YCbCr, DVI.

Mosaic display schematic

3) Support image superposition: any one or more signals can be superimposed on other signals for display.

Overlay display schematic

2.6 System advantages

2.6.1行业优势

ZAXTEAM has been focusing on technology research and development and product innovation in the splicing field for many years, providing complete solutions and high-quality products for customer needs. It is a well-known professional manufacturer of LED large-screen splicing display systems in the industry, with rich project implementation experience and strong R&D capability, product market share is in a leading position in China.

2.6.2 Advantages of the same brand

ZAXTEAM is an industry solution provider with the ability to develop all products from the front-end to the back-end of the system. There is no problem with the compatibility of equipment from multiple manufacturers in the system, and it achieves the best use effect and service life of the system. It also avoids the shirk of responsibility for after-sales service brought by multiple manufacturers and the efficiency of problem-solving.

2.6.3 Advantages of LED display unit

2.6.3.1 High brightness

The brightness value of conventional TVs, computer monitors and other display devices is between 250～300cd/m², and the brightness value of ZAXTEAM LCD splicing screen is between 450～700cd/m². The high brightness ensures the quality of the picture display and can more truly reflect the picture quality of the signal source.

Ordinary display scheme                                                                ZAXTEAM high-end display solution

2.6.3.2 High contrast

The contrast ratio of ZAXTEAM LCD splicing screen is as high as 2000:1～3500:1. High contrast can more effectively highlight the layering of the picture itself, and the excessive picture is more delicate, helping the viewer to effectively capture every detail in the picture.

Ordinary display scheme                                                            ZAXTEAM high-end display solution

2.6.3.3 Quick response

The true 5ms response time effectively eliminates the tailing phenomenon of the picture, the picture is smoother, and it is better adapted to high-speed dynamic picture display.

Ordinary display scheme                                                         ZAXTEAM high-end display solution

2.6.3.4 Ultra-wide viewing angle

The super wide viewing angle of 178° horizontal and vertical, standing at any angle, the visual effect is maintained. Excellent display performance is especially good when composing a super large splicing large screen wall, which is conducive to users to see consistent image effects from all angles.

Ordinary display scheme                                                          ZAXTEAM high-end display solution

2.6.3.5 Ultra-narrow side structure

ZAXTEAM LCD splicing screen bilateral comprehensive seam is only 3.5mm.

2.6.3.6 DCDi technology

ZAXTEAM liquid crystal display unit adopts high-end image processing chip, which can move the edge of the picture and adjust the pixel points that should be inserted around each pixel, that is, DCDi (Directional Correlational Deinterlacing) technology, which can be used to achieve all pixels in each scene The dots are always unified with the surrounding pixels. Even the filling of the pixels at the edge of the image can be combined into one to eliminate the stripes or jagged things on the edge of the image.

Ordinary display scheme                                                   ZAXTEAM high-end display solution

2.6.3.7TrueLife™ true color enhancement technology

ZAXTEAM uses a high-end display chip to enhance the high-frequency quality of the image, and uses its TrueLife™ Enhancement technology to identify image details such as skin fine lines, spots or hair. The processing of these details makes the picture look clearer and more vivid. It avoids the problems of noise, aliasing, and interference caused by traditional peaking filter technology.

Ordinary display scheme                                                ZAXTEAM high-end display solution

2.6.3.8 Dynamic adaptive noise reduction technology

The high-end display chip used by ZAXTEAM uses dynamic adaptive noise reduction technology to reduce noise without producing stains, and truly restores the original appearance of the image.

Ordinary display scheme                                            ZAXTEAM high-end display solution

2.6.3.9 Cross-color suppression technology

Cross color suppression (Cross color suppression) uses dynamic detector technology to selectively filter static images for a short period of time, and uses image storage technology to store the required chromaticity. After using this technology, in scenes with interlaced color changes: such as tiled roofs, cross-patterned clothes, leaf scenes, etc., there is no longer any excess noise.

Ordinary display scheme                                             ZAXTEAM high-end display solution

2.7 Decoding integrated platform

2.7.1 Decoding and Display

Configure the decoding video platform in the monitoring center to decode the front-end HD video stream. The decoding video platform is a back-end product developed by Hong Kong Zhiteng specifically for IP digital front-end equipment that integrates decoding and display. This product not only has traditional digital decoding functions, but also traditional video matrix switching functions, and output Display multiple divisions, arbitrary divisions and combinations, multiple outputs can be directly spliced and other powerful functions; finally, through one device, the traditional equipment requires multiple devices and multiple systems to achieve the integration of the program, and the operation is simplified and functional To achieve diversification in terms of quality, and to achieve absolute superiority in cost performance, so that end customers can truly experience, comfortable, convenient, and low-cost high-tech innovative products.

2.7.2 Video surveillance management platform functions

1. Video surveillance preview function

Function overview: Through real-time video preview, all-weather and omni-directional monitoring functions of front-end monitoring points are realized, real-time and clear monitoring of monitoring targets, and front-end conditions can be viewed 24 hours a day.

2. Information release function

Push function through distributed platform: a computer can push multiple different advertisement videos or pictures saved locally to any large screen for display; each video can be displayed by splicing or split screen, subverting a computer can only be large The traditional way of displaying a video on the screen saves a lot of computer hardware and access costs

3. KVM seat function

The main function:

• Installation is simple, each source computer or agent plugs into the USB wireless KVM node;

• The source computer and the host computer are directly interconnected through the network; KVM server control;

• The main control computer supports multi-monitor mode, and each display can be divided into screens to control other source computers.

• Each monitor of the host computer supports multi-screen display of different computer desktops and arbitrary control. Seamless switching and roaming between multiple displays;

4. Big data webpage dynamic display function

The main function:

• The processor obtains the webpage directly through the external network;

• No computer input is required (network delivery);

• Single cast 6-8 dynamic web pages (superimposable);

• The content displayed through the webpage can be posted;
  Can be spliced to achieve 4K web page effects;

5. 4K Ultra HD output display function

The main function:

• Support any number of screen splicing display;

• Support point-to-point playback of ultra-high-definition video (precise synchronization of high-definition video above 8K);

• Support audio and video synchronization playback;

6. Text publishing and LED subtitle function

7. IPAD tablet control function

The main function：

• Visual control ~ what you see is what you get

• It supports "what you see what you get" visual operation of the splicing system through iPad or touch computer.

• Real-time preview and echo of all video source images on the big screen

• Full touch drag operation

• Real-time interaction on the same screen

• Support window roaming and superimposition, drag, pull, shrink, and zoom windows arbitrarily, and support windows to adhere to the screen boundary independently.