短距离无线视频传输系统的设计

DESIGN OF SHORT DISTANCE WIRELESSREAL-TIME VIDEO TRANSMISSION SYSTEMABSTRACTIn general sense,as long as the communication and informationtransmission via radio waves,and the transmission distance is limited in ashorter range,is usually dozens of meters,can be referred to as the shortdistance wireless communication.Through the wireless transceiver module,this system uses MSP430G2553single chip microcomputer as the main control chip.The video signal of B and Cnodes,which is captured by Av camera,is transmitted to A nodes.Bycapturing switching signal,the MSP430G2553 microcomputer accomplishes thedisplaying chosen of the node B or C.Then by Synchronous video separationchip LM18811n,character superposition chip UPD6453gt,high-speed op-ampchips OPA836 and their peripheral circuits,we add the character design 'B'or 'Cat the video signal of the B or C node.We also finish relay communicationfrom B node to A node in C node.The video signal is still can be sent from Bnode to A node when the C node is as the relay and the power consumption isless than 150mw and there is no distortion of the image.Key Words:MSP430,Short distance wireless communication,characteroverlay