Digital Reversing Video System Based On Power Line Communication Technology

Reversing Video System(also known as Rearview Device)is an auxiliary visual parking system.When turning the clock back,it will display thesituationof the rear of the carbyLCD installed in the cab,captured by the rear camera.This device will obviously improve the safetywhen parking.At present,thecommon Reversing Video Systemalways uses the AV signal line or Wi-Fisignal to transmit video code bitstream,but it will bring noise into the AV signal line when the line is too long,and also need to drill a hole,which will destroy the structure of the vehicle and increase the installation cost.Although the Wi-Fitransmission will eliminate the trouble of wiring,it can't work stablely.To solve these problems,this thesis proposeda new solution——A Digital Reversing Video System Based On Power Line Communication Technology.The system consists of H.264 DEC,OFDM modem that can modulatevideocode into power line to transmit anda LCD displayer.This creation can not only eliminate the trouble of wiring,but also restrain the bit error rate by using digital signal for video code transfer.Furthermore,because of the flexibility of digital system,we can do more researches on it in the future.In this thesis,firstwe did studies on video encoding,color space encoding and OFDM carrier technology,and determined the basic schemefor the new product.Then according to the actual demands,we chose a processor designed for IP Camera using and designed circuits for some peripherals,such as I2 C port,LCD port,etc.After that we programmed on the hardware platform assembled by us.In this chapter we presented how to creat a compiling environment in the VirtualBox,and how to develop the application program based on Linux operating system.finally,we tested our work on the Testing Platform built with 12 V power source and signal generator.According to the test results,this paper proved the design scheme of the new Digital Reverse Video System Based On Power Line Communication Technology is reasonable,and has a brightfuture for furtherdevelopment.