一、Project Overview

1.1Project Overview

With the widespread use of large-screen splicing walls for commercial purposes, the market for splicing technology is becoming wider and wider, and new splicing curtain walls have been rapidly popularized in terminal large-screen display devices for engineering applications, especially embedded LCD splicing curtain walls, although the market launch time Not long, but it has been widely welcomed. The LCD splicing curtain wall serves as a safe city command center, railway (subway), port, terminal monitoring system, intelligent traffic management monitoring center, national defense or military monitoring system, power dispatch monitoring system, large-scale factory and mine monitoring system, financial management monitoring system, TV station or large-scale The studio center monitors the curtain wall, the background curtain wall of large-scale performance venues, and the key display equipment for the collection and processing of information such as video conferences. It has the ability to display various computer analog/digital signals, composite video signals, color difference signals, etc. on the large screen, and realize the signal Switch, superimpose, combine and other functions.

1.2Design scope

This project is mainly aimed at upgrading the original display equipment of the monitoring center of the entrepreneurial service center of a high-tech zone in a city. The current monitoring center splicing screen design uses 15 46-inch ultra-narrow-edge LCD screens with a splicing gap of 3.5 mm, and the overall composition is 3 rows and 5 columns. Mosaic wall.

After the upgrade, the new decoding equipment single-block screen supports 9-screen split display, which can display 15*9=135 screens at the same time, or 16-screen split display, which can display 16*15=240 screens at the same time. The district entrepreneurship service center uses a total of 126 points, which can meet existing needs and leave room for later points to increase.

二、system structure

2.1system structure

According to the design of the video integrated platform, the Hong Kong Zhiteng large-screen splicing system can seamlessly connect with the video integrated platform to obtain the best results. The following figure shows the structure and effect diagram of the large-screen display system.

The entire large screen system can be divided into the following parts:

2.1.1Front-end signal access part

Hong Kong Zhiteng's large-screen display system supports the access of various types of signals, such as analog cameras, high-definition digital cameras, network cameras, and other signals. In addition to remote cameras, it can also access local HDMI signals.

2.1.2Decoding and control part

After the front-end camera signal is connected to the video integrated platform, various signals can be decoded and controlled by the video integrated platform, and output to the large-screen display screen, and the entire large-screen display can be realized through the splicing control software installed on the control host The control and operation of the system realize the selection and control of the display signal on the wall.

2.1.3Display part on the wall

The large-screen display system supports the access display of DVI signals, HDMI signals and other signals. The signals that have been selected to be displayed on the wall are displayed through the control software. The full-screen display of the signals can be realized through the video integrated platform, with arbitrary division and window opening. A series of functions such as roaming, image overlay, arbitrary combination display, image stretching and zooming.

2.2 Main functions of video integrated platform

Configure a 16-output video integrated platform in the monitoring center to decode the front-end HD video stream. The integrated video platform is a back-end product developed by Hong Kong Zhiteng specifically for IP digital front-end equipment, which 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.

2.2.1Basic parameters:

1. Adopt modular design, each module supports two HDMI2.0 decoding output and one HDMI2.0 input encoding;

2. Support H.265, H.264, MPEG4, MJPEG2, MJPEG video stream decoding;

3. Support 4096*2160, 2544*1922, 1920*1080P, 1280*720P and other formats and custom resolution output;

4. Support 32-channel 4K or 128-channel 1080P or 256-channel 720P or 512-channel D1 audio and video decoding;

7. Support video access of NVR, DVR and other storage devices of mainstream manufacturers in the market, such as Dahua, Haikang, Xiongmai, etc. . .

8. Support 8 HDMI 2.0 input encoding; support 1080P, 720P and other encoding resolutions;

9. Support 16 HDMI 2.0 interface decoding output, backward compatible with HDMI 1.3 and other versions;

10. Each output port supports 1-36 screen split display and round robin display;

11. The output interface has functions such as splicing and arbitrary division;

12. Support equipment patrol and decoding by time period, group patrol in any group, and patrol time can be customized;

13. Support window opening, roaming, picture-in-picture functions;

2.2.2 Platform function introduction

1）Management function

User authority management can refer to the restriction of access to resources of ordinary users according to the security rules or security policies set by the system. Users of different levels can only access the corresponding resources authorized by themselves; the highest authority is the administrator, who can create, view, and Modify and delete the permissions of the same level and lower-level users. It is recommended that ordinary users not give this permission to prevent misoperation or random operation, which may cause various system problems, and ensure the stability and safety of the system.

2）解码输出管理功能

解码高清输出                            拼接输出                           分割输出

支持普通监视器拼接功能：比如，将4个显示区域合并成一个显示框，这个时候，四台监视器将拼接成一个放大的图像，即每个监视器显示同一图像的各自四分之一部分，和专业的拼接屏效果一样，只是普通监视器的边框，一般没有拼接屏那么细而已。另外，拼接方式随意可调，可根据实际需求做相应的调整。

支持屏幕分割功能：即单个屏幕，可实现2×2、2×3、3×3、4×4、5×5等任意组合；另外，屏幕分割还支持，在已做分割的小分割窗口内，再做画面分割，前提是总的总分分割数量不超过36个；

                                                                         Split window                                 Effect picture after 2×3 split                      Split the window and then do the segmentation effect diagram

Scene plan function: usually we need to use different display modes in different special situations, sometimes we need to splice, sometimes we need to split, and sometimes we need to split inside and then split, if we need to do it temporarily every time Configuration will be very troublesome, and sometimes it will be too late, or the personnel who knows how to operate are temporarily absent. In this case, it will be more troublesome; for this reason, we have made a scenario plan function in consideration of this requirement, and can change A variety of pre-configured display plans are configured in advance and saved in the system. When a special plan is needed, you can directly select the desired display plan. After use, switch back to the commonly used display plan.

3) Window roaming function

Splicing and window roaming are all realized by adjusting the size and position of the roaming window.

4) Decoding channel patrol function

Support two rounds of rounds: "time interval rounds" and "time round rounds";

A. Time interval round robin: You can add multiple video sources for each window, each video source displays a specified length of time, and the dwell time is set in seconds (S);

B. Time period round robin: In 24 hours a day, a certain display area (channel) is set to display a certain video source within a certain time period

Time interval round robin                                 Time interval round robin

5）Dome operation function:

For the image displayed on the TV wall, when operating on the software, if the corresponding image is a network dome camera, you can directly control the dome camera with PTZ function through the dome control window on the network matrix. The operation content includes, control The dome camera rotates in the direction, sets presets, deletes presets and other operations. The dome rotation speed software is adjustable, and it can also control the focus, zoom, and aperture of the integrated movement.

2.3 Monitoring center display

The pros and cons of the monitoring system mainly see whether the image is clear and whether the user's manipulation is convenient. By monitoring the TV wall, users can clearly observe the images they want to watch and deal with problems in time. According to the site survey, the TV wall of the monitoring center is 6.95 meters long and 3 meters high; according to the above dimensions, our company recommends 15 46-inch industrial-grade high-resolution LCD splicing screens, using 3*5 splicing combinations, splicing gaps Not more than 3.5mm to improve the overall display effect of the monitoring center.

Large screen display system renderings

Large LCD splicing screen size and space calculation

The size of the splicing wall is calculated by the number of curtain wall units (length M×height N) and the unit size. For example, a 46-inch splicing wall with 3 rows x 5 columns is composed of 15 46-inch splicing units. The approximate size and occupied space are calculated as follows: After splicing, its length is: single screen length 1024*5 column=5120mm. After splicing, its height is: single screen Height 578.6*3 rows=1735.8mm The height of the bottom end of the cabinet-style splicing wall from the ground is generally 900mm;

2.4 LCD large screen 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 overlay: any one or more signals can be superimposed on other signals for display.

Overlay display schematic