基于GMSL的车载摄像系统研究

为了实现车载高清视频长距离、低损耗地传输,研究了基于吉比特多媒体串行链路(Gigabit multimedia serial link,GMSL)技术的车载摄像传输系统的框架及其原理.通过对车载摄像传输系统的硬件电路、硬件编解码以及视频信号编码原理的探究,设计了一款车载前视摄像系统.首先,根据调研结果,模拟出传输系统整...

Study on vehicle camera system based on GMSL

In order to realize the long-distance and low-loss transmission of vehicle high-definition video, the framework and principle ofvehicle camera transmission system based on GMSL technology are studied in this paper. Through the exploration of the hardware circuit,hardware codec and video signal coding principle of the vehicle camera transmission system, a vehicle forward-looking camera system isdesigned in this paper. First of all, the overall environmental framework of the transmission system is simulated according to the researchresults. Then, the research conclusions of the power supply and the initial coding and decoding of the video signal are applied in practiceso that the video signal can be encoded stably and transmitted effectively. Moreover, the process of exploring the serializer/ de-serializerarchitecture, completing the configuration of the hardware, collecting and summarizing the data waveforms is conducted step by step.Finally, the restored signals are analyzed and image quality is evaluated, therefore, the research of the vehicle camera system based onGMSL is completed. The experimental results show that the camera system can well achieve the functions of serial and de-string tomodulate the transmittable video signal over 15 m. After the master unstrings the video signal, a stable and real-time high-definitionvideo image can be obtained at last. The research results show that the vehicle camera system can greatly transmit low-loss video imageswith resolution of 720 P over long distances. Furthermore, the outcomes of this research can be compatible with the current self-drivingcars.