What are the major causes of image quality in wireless surveillance systems?
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September 17 13:02:08, 2024
Wireless monitoring system has been widely used in the field of security, but in the actual wireless monitoring system, there will be insufficient image clarity when real-time monitoring occurs, which brings certain difficulties for playback, investigation, and research. Therefore, the image quality in the wireless monitoring system is also an important indicator of a wireless monitoring system, and there are many reasons that affect the image quality in the wireless monitoring system. The following focuses on the following aspects from Lehman Technology.
1, the camera itself
The difference between digital network cameras and traditional analog cameras is that digital network cameras must not only capture images, but also compress these digital images before transmitting them over the network. Image quality is related to the choice of front-end lens, image sensor, and compression chip. The resolution of the digital network camera, the quality of the lens, and the adaptability of the system to low ambient illumination all affect the image quality of the system. The sharpness of the image of a camera with a higher definition is definitely much better, but the higher the resolution, the higher the bandwidth requirement for a wireless monitoring device.
2. The quality of the connection cable used in wireless transmission
It is generally recommended that customers use ultra-five or more than six types of network cable to connect. Although the connection cable is only a small part, many people do not take it for granted and use an ordinary network cable at will, leading to instability of the entire wireless monitoring system. The wire diameter selected for the transmission line is too small, the cable quality is not good, the transmission cable has a connector, or the transmission distance exceeds the maximum transmission distance of such a cable. This can also cause the image signal to be attenuated and affect the sharpness of the image. At present, most cameras use high-definition network cameras. Therefore, the use of ordinary network cable to build video surveillance systems, then the signal attenuation will be very large, we must use more than five types of network cable to transmit, so as to ensure that the front-end image quality is not attenuated The transmission to the monitoring center ensures the stability of the video signal.
3, the quality of wireless monitoring transmission equipment
Wireless monitoring equipment selection is also very important in the wireless monitoring system construction process, stable wireless monitoring equipment can ensure the stable transmission of this video signal, it will not appear like image delay, sometimes there is no such phenomenon when transmitting images, visible wireless monitoring The choice of equipment should be careful.
Selecting the wireless monitoring equipment must take into consideration its anti-interference ability. If you choose a wireless monitoring equipment with poor anti-interference ability, then the transmitted image must be interfered by electromagnetic waves and the image quality will be affected. When the wireless monitoring device transmits front-end images, it must also consider the bandwidth of the front-end camera. If the front-end data is relatively large, and the wireless monitoring device cannot meet the requirements of its bandwidth, then there will certainly be image cards, image pauses, and sometimes no images. phenomenon.
4, the quality of the switch in the monitoring system
The switch is easily overlooked. Many people think that the switch is only a data exchange function and does not require any signal processing. It is easy to configure the switch without considering the configuration of the switch itself. This is an incorrect statement. If the data at the front end is relatively large, the backplane bandwidth of the switch and the packet forwarding rate must be considered. If the switch purchased by the user fails to meet the transmission requirements, it will appear after a period of time. Data jams, resulting in no front-end signal being received. It is also a problem that is easily overlooked by users.
5, the problem of the supply voltage in wireless monitoring system
We must ensure the stability of the supply voltage. If the camera voltage is not stable, the image will appear water ripple. The unstable voltage of the wireless monitoring equipment will cause the signal strength to weaken at certain times, and the images will be unstable. The long time will affect the service life of the wireless monitoring equipment.
For more questions, please consult Levin Technology. We will configure the most suitable solution according to your needs.