Building digital high-definition surveillance system is mainly to maintain the building order, defend the security of the building. It is usually in the building perimeter walls, entrances, each floor of the channel, elevator, elevator, reception, public areas, room, etc. key parts of the building that we can see installation of digital high-definition video cameras. Monitoring system can achieve real-time monitoring and video storage, can greatly improve the efficiency of security personnel and the timely processing of police intelligence, can effectively protect the safety of personnel and property buildings, while digital high-definition surveillance system is also conducive to building management departments, effective as the basis for reward and punishment, improve staff productivity.
    
   Nowadays,for modern enterprise, the building using a digital high-definition video surveillance system can enhance employee attendance management, improve work efficiency When traveling in different places, the use of mobile terminals such as PC, tablet or mobile phone can realize remote monitoring, to keep abreast of the real-time status of the building.

Building digital high-definition surveillance system have three different transmission means according according to the different demands.

1,A local short-distance surveillance monitoring system is the easiest way, as long as each camera is connected to the switch through the network cable, the NVR also connected to the switch and then  we can choose screen size according to the our demands to image quality.

2,Long-distance transmission, if the control room is more than 100 meters away from the camera,a secondary exchange can be realized through the switch. But there should be no more than three switches because digital switching takes time, if too many exchange times,it will cause the obvious screen image delay . Therefore, for longer distance transmission,fiber-optic transceiver is needed for changing the signal to be optical signal through the optical fiber.

3, remote surveillance, remote monitoring is realized via the Internet for transmitting the video signal. At first the switch and router need to be connected to the Internet, then the camera can be remotely accessed through the NVR client.Also camera  can also be accessed by P2Psoftware remote client through the server. Mobile terminals can also be supported , such as mobile phone monitoring.


Building high-definition surveillance system also has three parts Like other places monitoring system , namely:

1, the front-end video capture section

2, the signal transmission section

3, storage and display section


1,The front-end video capture devices usually include the following types:

1), the standard digital high-definition color camera
Usually divided into 1.0MP,1.3MP,2.0MP (without lens, the lens can be selected according to monitoring angle)

2) , dome digital high-definition video camera
Usually divided into 1.0MP,1.3MP,2.0MP (without lens, the lens can be selected according to monitoring angle)

3 ), IR Waterproof Digital HD Camcorder
Usually divided into  1.0MP,1.3MP,2.0MP.( the lens can be selected according to monitoring angle, also the appropriate intensity of infrared light infrared camera can be selected according to the monitoring distance )

4), digital HD IR Dome Camera
Usually divided into  1.0MP,1.3MP,2.0MP.( the lens can be selected according to monitoring angle, also the appropriate intensity of infrared light infrared camera can be selected according to the monitoring distance )

5) , digital HD Speed Dome Camera
Speed Dome Camera is divided into 1: High speed dome camera 2: Medium speed dome camera 3: Constant speed dome camera

6) , digital HD IR Speed Dome Camera
IR Speed dome camera can be divided into outdoor long distance ir speed dome camera,outdoor mini speed dome camera and indoor mini speed dome camera.Also have three types:1: IR High speed dome camera 2:IR  Medium speed dome camera 3: IR Constant speed dome camera

2, the signal transmission section

1), the transmission of 100 meters, digital high-definition camera uses network transmission, the camera interface is also a network interface usually only need to use hundred megabytes network cable, if the distance is within the transmission range of 100 meters,the camera can be connected directly.
2), .if the control room is more than 100 meters away from the camera,a secondary exchange can be realized through the switch. But there should be no more than three switches because digital switching takes time, if too many exchange times,it will cause the obvious screen image delay .

3), long-distance transmission, the ideal is to use optical fiber transmission, this means using  the fiber-optic transceiver by changing the network cable to optical fiber signal.

, In some special places such as , across the river monitoring can not use cable ,then we can wireless transmission .


3,storage and display section

1),it is recommended to use professional embedded NVR (Digital Video Recorder)

2), can also choose digital NVR (mode server) for remote forwarding remote monitoring.

3), the display section can be selected according to the needs of high-definition display screen size, if you need a large screen close-up you can choose splicing  screen display.


How to Choose Building digital high-definition surveillance system ;

Firstly, the selection of system
Building digital high-definition surveillance system is to monitor the surrounding walls, halls, public activity area , floor channels , entrances, elevators, elevator and other occasions , stable performance , simple solution is to control the cost of the core logic. Meet the next function , quality, operating performance , price and service levels late premise , the pursuit of the most simple system to optimize device configuration , is the most reasonable way to reduce system cost . Considering the difficulty of building and construction of digital high-definition surveillance system , maintenance personnel and operational factors , future expansion of the system , the system has an interface transformation reserved .

The overall design of the system as simple is to protect system reliability , it is recommended to use an embedded NVR ( Digital Video Recorder ) to a system of video storage and processing screen display devices , since the chip -level hardware decoding NVR is relatively PC requires CPU resources it is more likely to work long hours to ensure stability, such as the need for remote monitoring platform can be used for remote NVR can also be achieved. You can also configure a server for forwarding. Also need to make sure to monitor the large ones , due to the remote monitoring of large ones to determine how much direct forwarding server working pressure. Therefore, according to ones need to be monitored remotely configure the server can be selected to ensure the economic and rationality .

Construction volume of digital high-definition monitor analog monitor construction volume than ever to be small , because it is so logical connection point as possible to monitor the transport group nearby , is to close off a few points are then connected to a switch unity transmission, if the monitoring is far away from the use of fiber optic transmission is the most economical way . Because the digital camera 720P HD stream is 3M, 1080P is about 6M, so the simultaneous transmission of 15 points or more need to switch to Gigabit Ethernet line, but it is recommended simultaneous transmission of 10 points or more on the use of Gigabit Ethernet line.

Secondly, the selection of products
When selecting the front-end products primarily to meet the needs of surveillance applications , monitoring buildings are generally built on the basis of the concept of security and management , safety is undoubtedly more important at night than during the day , the utilization of natural surveillance at night than during the day so the more mundane recommend the use of devices with infrared , following on how to choose a digital high-definition infrared camera to make a brief introduction.

Note that the subject of many manufacturers of digital high-definition infrared camera infrared night vision distance is the distance achieved , from a few meters to several hundred meters. The night was clear and effective visual distance of the maximum distance that can be seen through the monitor , the distance by emitting infrared light , the photosensitive degree cameras , infrared reflection -site case to decide. Between them as a result of mutual matching of computer CPU, memory , graphics cards , chipsets , like a part of any reduction in efficiency will make the overall system efficiency is reduced, so in order to make the evening the night effect has been met, in addition to try to choose manufacturers of equipment outside the relatively formal but also a reasonable choice of viewing angle, high-definition digital video camera infrared light angle smaller viewing angle configuration , the smaller , role in the same light emitting angle directly affects the size of the distance light irradiation . This is the same point and a flashlight in front of the lights if the embryos removed then estimated that even 10 meters are not shine . There is not a digital high-definition infrared camera to see more infrared light emitting certainly stronger because of different electro-optical conversion efficiency of light-emitting chips are not the same , this looks like an ordinary 100 -watt bulbs yet 30 watt energy-saving light -emitting strong a reason.

IMPORTANT:
Select the digital high-definition infrared camera only to see its effects , because the red digital HD video camera outside the infrared energy at night when the light is turned on conservation law , such as the use of electro-optical conversion efficiency is 10% of infrared light, so if the 2 -watt power consumption in addition to generating electricity 0.2 watts of light outside must also produce 1.8 watts of heat due to the heat generated only a small area on the wick so will result in a small area of the heat accumulated temperature is very high, exceeding the luminous efficiency will occur when the wick operating temperature more low , while the rapid acceleration of the aging luminous body makes life shortened , so when choosing a digital high-definition infrared camera manufacturers must learn to pay attention to whether the infrared heat lamp on to take the appropriate measures.

There are many occasions building broad as parking, public areas , select Megapixel IR Dome relatively fit, if it is to select the digital high-definition infrared speed dome MINI small range or location of the installation is relatively low so that the situation will look more beautiful indoor small area , such as rest areas , restaurants , channel crossings, etc. , on the choice of digital HD MINI indoor infrared speed dome . Because , after all, a smart speed dome can monitor angle can be achieved without blind spot monitoring, if the environment has a more important area in this area can be set to guard bit ( can be set to a fixed position after staying idle time ), to avoid the speed dome machine because the monitor other when staying in the area while ignoring other occasions recording important occasions . In an important gateway must use fixed focus digital HD video camera , a digital high-definition video camera fixed in the choice when the attention of the choice of viewing angle possible not to choose too large an angle , because the angle is too large display screen objects too small lead not clear enough to see the phenomenon .

On-site monitoring requirements must be much larger angle but because of the angle of impact over the General Assembly on the results of infrared light , and the screen is too small is not easy to obtain a valid picture may not be suitable infrared smart speed dome use, you can choose to use a small pan to solve, is to choose a small digital HD camera angle and then stand in a small angle by rotating the stage Xiaoyun to expand the scope of monitoring , but usually also need to plug a small pan decoder , and the need to connect the 485 decoders and digital high-definition cameras , Since it is likely to cause too complex wiring fault factor. To this end , as the glory days of similar occasions specially designed a swivel bracket , swivel bracket million dedicated HD video camera , also known as HD cameras smart bracket. This is the glory days as a patented product , the appearance of the swivel bracket is a very beautiful digital HD camera mount , but the level design of the stepper motor mounting block plate 485 and decoding signals encoded by a digital HD camera board and back-end coding and unified communications to achieve various actions.

Building parking entrance usually need to see where the license plate , digital high-definition cameras are generally able to see during the day to meet the needs of the license plate , but the vehicles are driving at night because the lights so seriously affected the image imaging , if you use the standard digital high-definition infrared camera infrared light due to the formation of highly reflective plate (due to the surface properties of reflective paint the license plate ) and the same result in a white see above figures , so be sure to use a dedicated digital HD cameras and license plate to the scene to do after the test angle ( different angles will produce different results ) to install .

In the corridor between the elevator and select digital high-definition infrared camera or dome , mounted directly on the ceiling would be more general choice of white appearance, digital high-definition dome camera installation is relatively good , but the choice of digital HD Dome Camera also need to choose a guaranteed product cooling . Because many manufacturers of digital high-definition infrared camera hemisphere are plastic materials , heat treatment and did not do in the infrared lamp heating Department .

Thirdly ,the selection of installation method
     Digital high-definition video camera installed in the room to avoid backlighting installation , you should shun the light installation. Some regions such as when the corridor because it is too long need two digital HD cameras will be able to monitor an ideal picture , do not across two infrared digital HD cameras installed , because when you make the opposite infrared digital HD camera infrared lights turned on at night the cameras produce reflections and thus do not see a valid picture this situation as we drove the same night, the current face of the oncoming car driving lights when we do not see the same way . So when you choose to install outdoor mounted north-south position also try not to install something , because things toward the camera will be affected by the effect of direct sunlight .
Outdoor installation of a digital object choice next time try to avoid high-definition infrared speed dome , because nighttime infrared light will turn on when the object is irradiated to produce reflective affect display.
When centralized power supply will be regulated 220V first deal , if we can use UPS ( uninterruptible power supply ) is more appropriate . Note the position of the power as possible from the digital high-definition camcorder on the last point because the voltage of 12V when the voltage drop in the wire transfer will be great .

If a small area or a building there are a few points closer and farther away from the nearest switch or transfer device, the choice in this area to put a switch , the transmission will focus on all the points it saves engineering .
If the pole is installed digital HD speed dome machine or a digital HD camera outdoors sure the top of the vertical pole root lightning rod , and well grounded , so that the device can effectively avoid the lightning struck .

Fourth, the selection of storage and display
Building monitoring screens ranging from four to hundreds of screen depending on the size of the project. Here's the easiest solution to 64 pictures 4 pictures to be elaborated .
4 points on the use of a single NVR 4 -way as storage and decoding, and then use a 22 -inch high-definition display screen is divided into four displays on the line, if you want to monitor what screen with the mouse double-click on this screen that becomes a single screen displays .
If it is 4 points more than nine points or less on the use of a 9 Road NVR as storage and decoding, and then use a 42 -inch high-definition display will split the screen into nine displays on the line, if you want to monitor which screen to use Double click on this screen that becomes a single-screen display .

If it is nine points less than 16 points on the road using a 16 NVR as storage and decoding, one using a 42 -inch high-definition display screen is divided into 16 display ; Second, the use of four 42 -inch HD monitor splicing group will split into 16 display screen to display on the screen size and cost requirements to choose.

If it is 16 points less than 32 points on the road using a 32- NVR as storage and decoding, one using a 42 -inch high-definition display screen is divided into 32 display ; Second, the use of four 42 -inch HD monitor splicing group will split into 32 display screen to display on the screen size and cost requirements to select

If it is 32 points less than 64 points on the road using four 16 NVR as storage and decoding, using four 42 -inch or larger HD monitor each display screen is divided into 16 display , 16X4 = 64 If you want to monitor what screen with the mouse double-click the picture that becomes relative in single-screen display shows .

These are the most simple back-end systems . Whether how many channels there are in the system,reserved interface of NVR must be set aside for necessary future expansion .

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