Vehicle direct current carrier frequency single-line coaxial transmission method

Abstract

The invention discloses a vehicle direct current carrier frequency single-line coaxial transmission method. The method includes following steps: (1) a single-line coaxial line is provided; (2) a coding module at a sending terminal is provided, the coding module at the sending terminal is used for coding 8bit/12bit YUV video data output by an image sensor into a signal format capable of being carried at a receiving terminal and transmitted and output on DC direct current signals and transmitting the data to the single-line coaxial line; and (3) a coding module at the receiving terminal and a decoding module at the receiving terminal are provided, the single-line coaxial line transmits the data transmitted by the coding module at the sending terminal to the decoding module at the receiving terminal, the coding module at the receiving terminal is used for transmitting direct current power supply signals to the sending terminal through the single-line coaxial line, the sending terminal obtains a direct current power supply and triggers the image sensor and a coding chip to start working, and the coding module converts video signals to the format capable of being transmitted and carried on the direct current signals and sends the signals to the decoding module at the receiving terminal for decoding.

Description

technical field [0001] The invention relates to a vehicle-mounted DC carrier frequency single-wire coaxial transmission method. Background technique [0002] At present, high-end cars on the market are equipped with on-board high-definition cameras to improve the performance of current reversing camera products. However, due to the quality and bandwidth requirements of such high-definition cameras, the existing analog transmission lines can no longer be loaded. Most of them adopt LVDS digital transmission, and this kind of transmission is based on the design scheme of STP (shielded Twisted-Pain) transmission signal, but the power supply and control signal cannot be transmitted in the STP wiring harness at the same time, which eventually leads to the need to increase the wiring harness transmission for the power supply and control signal, resulting in The increase in the number of bus harnesses and the high specifications of STP wiring harnesses for vehicles lead to complex m...

AI Technical Summary

Problems solved by technology

[0002] At present, high-end cars on the market are equipped with on-board high-definition cameras to improve the performance of current reversing camera products. However, due to the quality and bandwidth requirements of such high-definition cameras, the existing analog transmission lines can no longer be loaded. Most of them adopt LVDS digital transmission, and this kind of transmission is based on the design scheme of STP (shielded Twisted-Pain) transmission signal, but the power supply and control signal cannot be transmitted in the STP wiring harness at the same time, which eventually leads to the need to increase the wiring harness transmission for the power supply and control signal, resulting in The increase in the number of bus harnesses and the high specifications of STP wiring harnesses for vehicles lead to complex manufacturing processes and fewer developers. With a large amount of manpower and material resources invested, the total cost of wiring harnesses has increased significantly. This design scheme is due to the cost relationship. The adoption rate and acceptance of car manufacturers is very low, which seriously hinders the development of automotive HD technology and smart car technology

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