Explain the wireless transmission mode of wireless video transmission in wireless monitoring

Microwave wireless monitoring can be divided into analog microwave and digital microwave.

1, analog microwave

In this way, the video signal is directly modulated on the channel of the microwave, and transmitted through the antenna. The monitoring center receives the microwave signal through the antenna, and then demodulates the original video signal through the microwave receiver. This monitoring method has no compression loss and almost no delay, so the video quality can be guaranteed and it is suitable for point-to-point single transmission.

2, digital microwave

Digital microwave is the first to encode and compress the video signal, and then transmit it through the digital microwave channel, and then use the antenna to transmit it; the receiving end is reversed, the signal is received by the antenna, then the microwave despreading and video decompression, and finally reduced to analog video signal transmission. Going out, this method is also used more in the domestic market. The digital microwave has large scalability, and the communication capacity can be used for at least a dozen channels, and the construction is relatively easy, the communication efficiency is high, and the application is flexible. Digital microwave has the advantages that analog microwaves are incomparable, such as many monitoring points, multiple situations requiring relaying, complicated situations, and many sources of interference.

To sum up, digital microwave has large capacity, strong anti-interference ability and good confidentiality. The same transmission power transmission distance is farther, less affected by terrain or obstacles, rich interface, strong expansion capability and so on. On the contrary, analog microwaves do not have these advantages, but they are cheaper.

Analog microwave transmission is to directly modulate the video signal on the channel of the microwave (microwave transmitter), and transmit it through the antenna. The monitoring center receives the microwave signal through the antenna, and then demodulates the original video signal through the microwave receiver. If you need to control the PTZ lens, add the corresponding command to control the transmitter in the monitoring center. The monitoring front end is equipped with the corresponding command receiver. The image of this monitoring mode is very clear, no delay, no compression loss, low cost, construction installation and debugging. Simple, suitable for general monitoring points is not a lot, need to use when there are not many relays.

Digital microwave transmission is to first compress the video code, then modulate it through the digital microwave channel, and then transmit it through the antenna. The receiver is opposite, the antenna receives the signal, the microwave despreads, the video decompresses, and finally the analog video signal is restored. After de-spreading, install the corresponding decoding software through the computer, use the computer to decompress the video softly, and the computer also supports video, playback, management, cloud mirror control, alarm control and other functions; this monitoring mode video has a delay of about 0.2-0.8 seconds The cost varies greatly according to the actual situation, but there are also some advantages that analog microwaves are incomparable. For example, there are many monitoring points, the environment is more complicated, and there are many situations where relaying is needed. The monitoring points are concentrated and it can transmit multiple channels of video in a concentrated manner. The interference ability is better than the simulation, and so on. The advantage is that it is suitable for monitoring points and requires more relays.

Analog microwave transmission and digital microwave transmission , each with its own merits, mainly depends on your actual engineering needs! If you have a wireless monitoring project needs, you can communicate with our Weifu professional wireless customer service, you can develop a professional wireless transmission solution for you!