Transmission system and transmission method for serial digital interface (SDI) high-definition video signals

Abstract

The invention discloses a transmission system for serial digital interface (SDI) high-definition video signals, which comprises a sending end, a receiving end and a coaxial cable for connecting the sending end and the receiving end. The sending end comprises a receiving unit, a high-definition coding unit, a packaging unit, a modulation coding unit and a sending end mixer which are connected in sequence. The receiving end comprises a receiving end mixer, a demodulation decoding unit, a demultiplexing unit, a high-definition decoding unit and an output interface which are connected in sequence. The sending end of the transmission system receives, codes and packages the high-definition video signals which are modulated and coded into digital video broadcasting-cable (DVB-C) radio frequency signals, the sending end is connected with the receiving end through the coaxial cable under 2000m, and the receiving end enables demodulation, channel decoding, demultiplexing and high-definition decoding to be performed on the DVB-C radio frequency signals which are restored back to serial digital video signals or converted into high-definition digital multi-media signals. Therefore, stable transmission of the SDI high-definition video signals at the distance between 100m to 2000m is achieved. Simultaneously, the invention further discloses a transmission method for the SDI high-definition video signals.

Description

technical field [0001] The present invention relates to the technical field of video monitoring, and more particularly relates to an SDI high-definition video signal transmission system and a transmission method thereof for a video monitoring system. Background technique [0002] With the continuous progress of society, rapid economic development and rapid technological advancement, people pay more and more attention to public order safety, production safety and property safety. Therefore, video surveillance characterized by video information is widely used in all walks of life. With the development of video surveillance technology, the requirements for the clarity of video images are getting higher and higher, and high-definition video cameras are usually used to obtain the monitored video images. [0003] The video output of existing high-definition video cameras has an SDI interface (serial digital interface). If the SDI high-definition video is directly transmitted, the ...

AI Technical Summary

Problems solved by technology

[0003] The video output of the existing high-definition video cameras has an SDI interface (serial digital interface). If the SDI high-definition video is directly transmitted, the distance can only be transmitted about 100 meters, because if the transmission distance is too long, the video quality will suffer. question

In the process of transmission, if the light-enhancing terminal unit transmits and then receives, the transmission distance can reach more than 2 kilometers, but if the distance is between 100 meters and 2000 meters, the transmission distance is too far to use SDI directly. The cost of optical fiber transmission for light emission and light reception is too high and the construction is difficult

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