1、 Coaxial cable transmission

Coaxial cable can be divided into RF coaxial cable and video coaxial cable. Video monitoring RF cable is usually used for cable TV transmission, and video cable is the most widely used transmission line in video monitoring system at present.

2、 Twisted pair video transmission

Security monitoring baseband transmission, that is, the 0 ~ 6mhz video baseband signal is not processed, and the analog signal is directly transmitted through the coaxial cable. The camera and the picture splitter are directly connected by video cable.

3、 Optical fiber transmission

The optical transmission system consists of three parts: light source, transmission medium and detector. The work of light source and detector is completed by optical transceiver.

4、 Network transmission

It uses audio and video compression to transmit monitoring signals, which is suitable for remote monitoring and decentralized monitoring points. The advantages are: the network video server is used as the monitoring signal uploading equipment. Where there is an Internet network, the remote video monitoring software can be installed for monitoring and control.

5、 Microwave transmission

Microwave transmission is one of the solutions to solve the problem of monitoring transmission in places where it is difficult to wire for several kilometers or even tens of kilometers. The method of FM modulation or am modulation is adopted to carry the image on the high-frequency carrier, convert it into high-frequency electromagnetic wave and transmit it in the air.

6、 Wireless transmission
Wireless transmission is also called open circuit transmission. The transmission process is: audio and video signals → modulation → high frequency signals → reception → demodulation → audio and video signals, and then broadcast or display them on the terminal equipment. It is characterized by simple installation, but the transmission power is strictly controlled, and the distance is generally no more than 500 meters.