A data transmission method and device based on a coaxial cable

Abstract

The invention discloses a coaxial cable-based data transmission method and device, including data receiving and format conversion steps, CRC calculation and insertion steps, bit mapping steps, parallel conversion steps, etc. Data, and according to the predetermined rules, the data format is converted, and the CRC check code and TRS sequence are inserted, and then according to the predetermined parallel data bit width W, the data packet is mapped into a data packet with a bit width of W, and further converted into a 1 The bit serial data is transmitted through the coaxial cable, and the device includes: a data receiving and format converting unit, a CRC calculating and inserting unit, a bit mapping unit and a converting unit. The invention converts the source data into serial data and sends them through the existing coaxial cable, thereby greatly reducing the cost.

Description

technical field

[0001] The invention relates to the field of data transmission, in particular to a coaxial cable-based data transmission method and device. Background technique

[0002] At present, as China's video surveillance market is stimulated and driven by factors such as safe city construction and other security projects and the rapid growth of video surveillance demand in various industries, it has achieved extraordinary rapid development, and the overall market scale has expanded rapidly. Due to its low image definition, the analog monitoring system can no longer meet the security requirements. However, the adoption of a fully digital monitoring system will bring a large cost of network cable deployment, especially for the renovation of monitoring systems in old residential areas and factories.

[0003] With the wide application of video surveillance, the demand for digitalization is getting higher and higher, showing the trend of replacing traditional analog syste...

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