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Today, video surveillance systems are popular. Almost no one wants to stare at small computer monitors every day, and the number of video channels displayed cannot meet the actual requirements. Therefore, building a video wall environment that can be monitored centrally has become almost every monitoring. Projects must be addressed.
Then, for the various video surveillance wall solutions on the market, let's make a comparison.
1. Use DVR and NVR to directly display the upper wall
This approach is the cheapest, but there are quite a few restrictions here:
It is impossible to concentrate the upper wall of the scatter point. For example, in a chain-operated hotel, if I build a centralized wall environment at the headquarters, this is very troublesome. There are many places to consider here, including network environment, mapping, bandwidth, and code stream.
Can not be controlled at will, to control can only operate that DVR. If a 16-channel camera is set up on a DVR, when you want to control a certain screen, you have to remember which DVR it is on, and then go to the DVR to operate the mouse.
The impact on the layout environment is very large. For example, in a professional on-wall environment, the cabinet in which the equipment is placed is behind the TV wall, and the operator's seat in front of the TV wall is required to control the large screen. At this time, it is obviously very troublesome to use this method, because you can't put the DVR on the big screen, and drag a lot of long mouse lines to the console seat.
2. Using the analog matrix
The common structural diagram is as above. In this application scenario, it should be said that it is a professional approach to the wall. As you can see, although the analog matrix itself is not expensive, it requires a large number of video lines, even optical transceivers, and must be pulled from the camera to the center. This construction cost will be very high. More importantly, this method is more suitable for analog cameras and DVRs. However, in the era of high-definition networks, most IPCs do not have video output at all, so this method will be in a dead end. This is also the case of traditional analog matrix manufacturers in the HD era. One of the biggest challenges.
Third, use the decoder
The decoder is really a very illusory concept. Currently, 99% of the decoders are made by the DVR/NVR backplane, and even the programs are unchanged. There is almost no separate SDK protocol. In this way, the scheme using the decoder is not fundamentally different from the scheme using DVR and NVR. In this case, its advantages and disadvantages are also very clear, and will not be described here.
Use digital matrix
The digital matrix is a mid-to-high-end decoding device that decodes the front-end digital video signal onto the wall. The input end of the signal is a Gigabit Ethernet port, and the output terminal is a standard VGA/DVI/HDMI video interface, which can be directly connected to the display. A splicing controller can also be connected. In addition to the full functionality of the analog matrix and decoder, it has more features and more decoding capabilities. It can support DVR, DVS, IPC and NVR devices of different manufacturers to decode the wall at the same time, and has the functions of video switching, picture segmentation, picture stitching, round-robin display, cloud mirror control, video playback, alarm linkage, etc. Its advantages are:
Through plug-in technology, using proprietary protocols or SDKs, it can be perfectly compatible with various front-end digital video devices such as DVR, DVS, IPC, NVR, etc. from different manufacturers.
·Support picture stitching
The advanced soft splicing technology eliminates the need for additional splicing controllers, splicing matrices or splicing boxes. With the click of a mouse, 2*2, 2*3, 3*3, 3*4 and other multi-screen splicing can be easily realized. It is convenient and cost-effective.
·Alarm linkage on the wall
In combination with the sharp-eye dedicated video linkage alarm host or the third-party network type alarm host, the video linkage alarm can be realized on the wall, and the video of the associated camera generated by the alarm signal generated on the front end is displayed on the pop-up window, and the user is reminded by sound and color.
· Support more input
Different from the ordinary digital matrix, there are only dozens of input restrictions. Because of the combination of “platform + digital matrix”, it supports 128 channels, 256 channels or more of video input, which can meet the needs of various wall-scale projects.
Nowadays, digital matrix is more used in conference systems, because the biggest advantage of digital matrix is that it can add a variety of video signals, such as cameras, DVDs, VCRs, physical exhibition stands, desktop computers, many notebook signals, etc. It is also possible to output a variety of video signals to the display terminal: a projector, a splicing screen, a liquid crystal display, and the like.
A common application diagram is as follows:
Five. Using the stitching controller
From the basic function, the matrix only implements the signal cutting function, and one signal is switched and displayed on one display device, and the splicing controller can display a complete signal on multiple screens in addition to signal switching. But now the product function integration is getting higher and higher, I have some functions, you can achieve the splicing function like the hybrid matrix, the boundaries between the products are not so obvious, it is estimated that the final integration into an image signal processing device will get everything. .
Six. Use monitoring integrated platform integrated machine
This stuff is very powerful, and it is also the product of many big manufacturers. From this product, it can be seen that the big manufacturers are eroding the ambitions of the market segment.
Simply put, this kind of equipment is video server + hard disk recorder + encoder + decoder + video matrix + integrated platform software, does it feel like Da Vinci wants you to kill 3000, the ultimate killer, let's take a look at a big factory One machine function description:
The integrated security management platform includes multiple subsystems such as video surveillance, access control, video intercom, intrusion alarm and parking lot. The system integrates deeply, realizes integrated, digital and intelligent integrated management, providing customers with flexibility and convenience. Reliable, stable and efficient quality management services for small and medium-sized projects in residential areas, shopping malls, supermarkets and other places.
Functional characteristics -
- High performance service platform
The single device supports up to 2000 channels of video, 500 access control, 2000 video intercom, and 20 lane management scale;
Support multi-level and multi-domain management;
The platform supports 10,000 user management, 500 users online access, and 50 users concurrently log in;
Single device supports 128 channels to 256 channels 2M code stream concurrent recording, 32 channels 2M video playback download; supports 128~256 channels concurrent forwarding;
- Comprehensive management
Integrate video surveillance, intrusion alarm, access control, video intercom, parking lot, inspection subsystem;
Support large-screen management, alarm on the wall, playback on the wall, scene management, plan management and other TV wall functions;
Support platform cascading through the national standard 28181 agreement;
Support intelligent Smart search and video quality diagnosis;
Support advanced applications such as access control, anti-submarine return, double-door interlock, multiple authentication, and first card opening;
Support video intercom intercom monitoring, intercom communication, remote door opening, information release and other functions;
Support parking lot entrance and exit management, support cash, WeChat, Alipay payment; support mobile terminal mobile charging;
Support registration of merchant information, used to display coupon usage, and support coupon deduction;
Support license plate cloud correction to improve the accuracy of entry and exit license plate recognition;
Support multiple forms of inspection points, including: access points, monitoring points, IO input, RFID tags, etc.;
Support PC client, WEB webpage, iOS/Android mobile client, network keyboard, iPad large screen control client and other control methods;
- Efficient storage service
Provides 3U16 disk/4U24 disk storage capacity, supports up to 6TB hard disk, and can cascade expansion cabinets to achieve stacking and cascading capacity expansion.
The bottom layer of the device supports disk detection and repair mechanisms to improve disk usage efficiency;
Support RAID 0, 1, 3, 5, 6, 10, 50, VRAID multiple RAID modes, as well as global hot standby and local hot standby, multiple data security protection;
Support storage device level N+M backup;