The Design And Implementation Of High Definition Digital Television Signal Transmission

This paper introduces the modification of high definition digital television signal system from Tianjin Tower front end,it builds up partial equipment to implement high definition digital signal transfer based on the original broadcast system,this paper focuses on the analysis of high definition digital television signal receiving system,coding system of video format and bottom level monitoring system.This paper clarifies the basic knowledge and operation specification during the specific implementation,which meets the construction requirement of broadcast equipment room defined by headquarter of department in order to ensure the purpose of security,reliability and expandability.It also provides necessary introduction of the most important equipment such as high definition receiver,encoder,transcoder and multiplexer,the process starting from the making model at the designing phase to determing the equipment and their special performance.Besides,this paper introduces the specific configuration and operation manual among differences equipments by taking example of central high-definition digital TV routing in real broadcast system,and it provides detail explanation via corresponding screenshot of equipment network administration.For the Mosaic occurred on the reconstructive high definition program transcribe process,this article also made a detailed research,and tried to identify the possible cause of the problem one by one,then listed various retrofit scheme to compare,chose the optimal solution.Finally,we done the construction in accordance with the solution plan,successfully solved this problem.This paper also provides structure explanation and performance analysis of specific equipment on bottom level monitoring system,finally it verifies if the quality of output television signal based on high definition digital television signal system meets the broadcast requirement from headquarter department via the video and audio performance from the output screen and target parameter detected by monitor equipment.