How Do I Choose the Best CCTV Security Cameras?
HD surveillance camera is a professional video surveillance camera in the surveillance field. Standard H.264 video compression format, supports multi-stream selection, and the video resolution reaches above 720P (1280 * 960). It adopts G723.1 / 6.3kbps compression algorithm and supports two-way audio. The resolution can reach the broadcast image quality of 720TVL. The high-definition megapixel surveillance camera not only has high definition, but also is easy to operate and easy to install. It greatly reduces engineering wiring and construction costs, and allows your network to extend infinitely.
HD surveillance camera
- Chinese name
- HD surveillance camera
- Maximum resolution
- 1280 × 960
- Video resolution
- 720P (1280 * 960) or more
- Sharpness
- 720TVL
- HD surveillance camera is a professional video surveillance camera in the surveillance field. Standard H.264 video compression format, supports multi-stream selection, and the video resolution reaches above 720P (1280 * 960). It adopts G723.1 / 6.3kbps compression algorithm and supports two-way audio. The resolution can reach the broadcast image quality of 720TVL. The high-definition megapixel surveillance camera not only has high definition, but also is easy to operate and easy to install. It greatly reduces engineering wiring and construction costs, and allows your network to extend indefinitely.
- Megapixel surveillance camera is a professional video surveillance camera in the surveillance field. Standard H.264 video compression format, support multi-stream selection, video resolution reaches 720P (1280 * 960). It adopts G723.1 / 6.3kbps compression algorithm and supports two-way audio. The resolution can reach the broadcast image quality of 720TVL. Because the standard H.264 compression is used, the video file can be decoded using a standard decoder, which supports direct playback by commonly used playback software. It also has an SD memory card slot, which can effectively solve the problem of video loss caused by network failures. At the same bit rate, it has double the picture quality than MPEG-4. Under the same picture quality, the bit rate is only MPEG-4. Half. As the high-definition megapixel surveillance camera is not only high-definition, easy to operate, and easy to install, it greatly reduces engineering wiring and construction costs, and can allow your CCTV network to extend indefinitely.
- · Using 1/3 Ex-view 1.3 Mega Pixel CCD · High-quality image signal output, image resolution up to 1280 × 960
- · Standard H.264 video compression format, support multi-stream selection
- · Adopt G723.1 / 6.3kbps compression algorithm, support two-way audio
- · Low frame rate and high frame rate transmission, unique technology to maintain ultra-low bandwidth
- ·
- Testing HD surveillance cameras mainly tests sharpness and color reproducibility, illuminance, and backlight compensation, followed by measuring their surveillance camera distortion, power consumption,
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- 1. Home video anti-theft, community network video anti-theft system
- 2. Large-scale communication operators promote 3G auxiliary publicity materials in the early stage to increase the number of users who join the network
- 3. Wireless monitoring of ATMs, bank tellers, supermarkets, factories, etc.
- 4. Nursing homes, kindergartens, and schools provide remote wireless monitoring services
- 5. Unattended system of electric power station, telecommunication / mobile / Unicom base station
- 6. Wireless monitoring system for petroleum, drilling, exploration, etc.
- 7, wireless monitoring systems for coal mines, mines, wellheads, etc.
- 8. Wireless monitoring system for intelligent buildings and intelligent communities
- 9, assembly line wireless monitoring system, warehouse wireless monitoring system
- 10. Remote wireless monitoring of pasture detection, water pollution, and river resources
- 11. Wireless supervision of outdoor equipment, wireless video anti-theft of outdoor products
- 12. Wireless monitoring system for traffic conditions of bridges, tunnels and intersections
- 13. Traffic accident-prone areas of public security traffic expressways
- 14. Flood prevention detection in unattended tourist areas, breakwater detection, dam break detection
- 15, forest fire prevention modern forest farm checkpoint mountain forest fire
- 16, environmental detection, on-site weather and temperature transmission management
- 17, wireless video surveillance at customs ports, train stations, terminals, airports
- 18. Power tower, transformer anti-theft, wireless transmission of remote meter reading system and video anti-theft
- 19. Wireless video transmission of command exercises such as army warehouses
- 20,
- Why is there no image displayed after the HD surveillance camera is connected to the LAN?
- 1) Check whether the power of the camera is normal. When the infrared camera covers the photoresistor, the infrared lamp will be turned on and the sound of IR cut switching can be heard;
2) Ping the IP address of the camera to see if it can ping. If not, check the network connection, such as the line, network card, crystal head, etc. for failure; 3) Check whether the IP address of the camera conflicts with other IP devices in the LAN. Whether the IP address of the host and the IP address of the camera are on the same network segment;
4) Whether the software used matches the camera (because the company's cameras had dynamic IP and fixed IP before, the software is also different);
5) Test with another host to see if the previous host does not support the graphics card.
- 1.Application requirements
- HD surveillance cameras are mainly used in financial systems, municipal agencies, road traffic monitoring and other places with high requirements for images. These places require sufficient visibility of facial features, behaviors, license plate numbers, etc. Therefore, if the project you are undertaking is these application sites, you can consider whether to choose the HD surveillance camera from the cost point of view.
- Product characteristics
- Generally, cameras higher than 600 lines are positioned as high-definition surveillance cameras on the market. In fact, some unsound manufacturers in the market sell 500-line chips as 600-line products, mainly because the video digital processing chips are different. This is very different from the contrast imaging effect of a real 600-line CCD chip, so as far as possible, all manufacturers should choose manufacturers with good reputation, such as LODE, Dahua, etc.
- Functionality
- The high-definition surveillance camera is mainly reflected in the sharpness of the picture. To achieve the sharpness of the picture, it is not only a horizontal resolution of 600TVL, but also has wide dynamic, automatic white balance, image sharpness adjustment, super Digital noise reduction, intelligent digital automatic metering compensation and other functions. When detecting the WDR function, you need to observe whether the transition between the bright and dark areas is clear and natural, and whether the WDR can be adjusted automatically. A good camera will have rich levels and delicate performance in both light and dark areas. When looking at the license plate under the headlights at night, the outline, filament and license plate of the headlights are very clear, and no vertical bright lines appear. For low illumination, it is necessary to observe whether the surveillance image of the camera is clear and the noise level at night.
- 4, easy to control
- HD surveillance camera operation settings are mainly adjusted through electronic menus and dialing. Cameras with electronic menu functions need to pay attention to whether the menu content is rich, the operation is convenient, and whether it can meet different complex monitoring environments. And the Chinese menu function is more intuitive and easier to use than the English menu debugging. Some camera menus have standard day, day, night, party, road, and custom modes. You only need to select a mode to easily meet the needs of various complex environments. This function is faster and more convenient.
- 5.Data interface
- Surveillance cameras may not work normally due to environmental or human damage in actual applications. Therefore, when purchasing a high-definition surveillance camera, we must also pay attention to whether its back-end data interface is rich. Generally, it needs to have an alarm interface, audio interface, and RS-485 interface. Some interfaces can improve the security level of monitoring, and some interfaces can facilitate remote menu call settings and improve the convenience of monitoring equipment maintenance
- 6.Wide voltage function
- We often encounter the phenomenon that the power supply is unstable and the camera is burned in practical applications. Especially in some remote mountainous areas, the high and low voltages easily cause the surveillance cameras to fail to work normally. The power of the camera is mostly DC24V and AC12V. However, some manufacturers' cameras have a wide voltage function. For example, the standard voltage is AC12V, but the camera can work normally between 916V. The benefits of the wide-voltage function are now obvious.
- 7, lightning protection function
- With the rapid popularization of security monitoring systems in the management of banks, transportation, residential areas, and warehouses, the possibility of damage to the monitoring system equipment due to lightning strikes has greatly increased. Up to 85% of surveillance cameras damaged by thunderstorms during thunderstorm weather may cause the entire surveillance system to malfunction, and the price of high-definition cameras is also high, which directly causes economic losses that are difficult to estimate. Shiyou cameras with lightning protection patents on the market are relatively mature, so it is very important to choose a camera with chip-level lightning protection.
- 8.Other systems
- To obtain high-definition images, in addition to the front-end high-definition surveillance cameras, the transmission system, intermediate system, and terminal display system must meet the bandwidth and compression requirements to achieve the high-definition practical effect. This includes cables, matrices, video recorders, servers, and various encoders. The optical cable has a large bandwidth, small attenuation, and high anti-interference, which can better ensure the stable quality during image transmission. The terminal display device is best to choose a progressive scan monitor, and it is more than 600 lines. Therefore, in addition to the front-end monitoring equipment, other supporting facilities are also important indicators of monitoring quality.
- 9. Technical services
- Finally, before you buy a product, do nt forget to understand the manufacturer s technical support on the product, whether you can provide professional technical training for the product, and analyze and explain the special features and operation menus of the product in detail. These are important for later construction and maintenance. Are very important. In addition, if the product fails to work properly, it is also very important for the manufacturer to provide various corresponding technical services.
- One. No image:
1. Check whether the power supply is well connected and whether the power supply voltage meets the requirements (power supply error: DC12V + 10% AC24V + 5%);
2. Whether the BNC head or video cable is in good contact;
3 Whether the lens auto iris is open;
4 Whether the video or DC-driven automatic aperture lens control line is shorted to ground;
5. Check if the video leakage causes the CCD board video to burn all the way;
two. Image quality is not good:
1. Whether the lens has fingerprints or is too dirty;
2. Whether the aperture is adjusted properly;
3 Video cable has poor contact;
4 Whether there is a problem with the electronic shutter or white balance setting;
5. Whether the transmission distance is too far;
6. Whether the voltage is normal;
7. Whether there are interference sources nearby;
8. When installing in an elevator, ensure insulation with the elevator to avoid interference;
9. Whether the focal length of the lens is not adjusted properly;
10. Whether the CCD of the board is uneven;
11. Check whether the lens is a C-type interface or a CS-type interface. If the C-type interface must be added with a ring, if the CS-type interface, remove the ring
III. Infrared camera has poor night vision, aperture, and normal daytime images: `
1. Check if the infrared light is not bright enough;
2. 2. Check if the distance between the lens case and the lens is too large. Whether the infrared light matches the lens (please see the reference table for details)
4 Check if the infrared light is activated;
5. Check whether the CCD camera or lens is infrared sensitive;
6. Check whether there are reflective objects in the surrounding environment or whether the space used is small;
7. Check whether the effective infrared distance of the machine corresponds to the actual distance. IV. Sometimes when there is no image:
1. Whether the power supply voltage is stable;
2. Whether the video cable is loose and the connector is firm;
3 Whether the video is in good contact;
4 Is there any disconnection or poor contact of the power cord? There are several black bars or horizontal bars mixed on the screen:
This situation is usually caused by the ripple of the output voltage of the power supply of the machine is too large or the power supply voltage of the machine is too low;
6. The image appears distorted or geometrically distorted:
1. Check whether the optical lens used is abnormal;
2. Is the output impedance switch of the monitor set to 75 ohms?
3. Check if the impedance of the video connection cable used is 75 ohms;
Seven. The integrated infrared camera works normally during the day and no image at night:
It is because the power of the power supply cannot meet the requirements, because the infrared all-in-one is no different from ordinary cameras when working in the daytime, but at night the infrared light is in the working state and the working current suddenly increases;
Eight. Integrated camera cannot focus automatically:
1. Check whether the focusing state of the integrated camera is in the key control priority or the auto focus state;
2. The ambient light is too bright, causing the camera brightness to be too high. The camera cannot find the focus point.
Nine. The image appears black and white without color:
1. The video line is too long and the video signal attenuation is too large;
2. Monitor is turned to black and white;
3 The crystal oscillation frequency of the CCD board machine is out of range;
4 The color value of the CCD board program software is adjusted too small, which causes its color to be hardly displayed.
ten. All-in-one camera suddenly restarts when zooming in or the image does not appear after a period of time:
Because integrated cameras have relatively high power requirements, the operating current suddenly increases due to the need to drive the motor when zooming. This will cause insufficient supply of decoders (boards) that are insufficiently powered and cause the camera to suddenly power off.
eleven. Like whitish and foggy:
1. Check whether there is water mist inside the machine;
2. Check if the lens cover is tight against the glass;
3 Check if the camera has a lens case;
4 Check whether there is water mist in the CCD of the board machine;
5. Check if the camera's electronic shutter is open (if it is open, close it);
6. Check whether the infrared light board is parallel to the lens (that is, there is a certain angle between the infrared light and the lens);
7. Figure to check whether the lens is higher than the lens case, just as high (generally, the lens case is 3-4 mm higher than the lens);