The Research Of The Automatic Broadcast Monitoring System

After the analysing home and abroad of the monitoring technology oa the broadcast program, and demonstrating on the difference of the monitoring function between the home and abroad,based on thesufficient understanding of the need of the local broadcast monitoring department,the thesis focus on the development of the automatic broadcast monitoring system.The design based on the high speed hardware card of video and audio,reaiize the realtime monitoring of multi-channel TV and Radio program.Developed by Visual Basic.net,the system design different arithmetic aiming at different trouble.Based on the digital video/audio signal process,comparing of much more experiment data, and getting different character vahie,lead to the achievement of monitoring. The system can carry out the function including TV monitoring,TV send&control video breakoff,TV transmitter RF breakofi;rad!o send&control audio breakoff, radio transmitter RF breakoff,TV and radio recording .etc. Compared with the tradition system(based oa the singlechip),the system adopt the open design. So it no only get the more fully function,but also get the well expansibffity.It allows the new additional module late.After the analysis of the video data from the hardware card and the research of the value including the frame difference, average lum,lum Mean Square Error,proportion of RGB,etc,the system solve the problem about the video breakoff with the full composite synchronization signal.It is the key technology of research.The traditional way to checking the synchronization signal can judge the breakoff behind the switch equipment,but can't solve the monitoring in the studio.Because the switcher and othe AV equipment can renew the lost synchronization signal.This system solve this problem.The system arrange the software and hardware resource flexible,focus on thepotential use of the equipment in existence,simplify the design. So it can get out the integrated monitoring system with strong orientation and low cost.This thesis include five chapter. The forward introduce the function of broadcast monitoring and the technical application home and abraod.The first chapter introduce the working flow of broadcast,put forward the design of the system and something about the develop kit including PV988AV, DS-4004H and Visual Basic.net.The second chapter demonstrate the theory of the monitoring according to every kind of problem. The emphasis is the video monitoring module. The third chapter introdue the trial system ,the developing procedue,the successful test run,and the new mode of the monitoring. In the forth adapter the summary of the whole article is given.