The Studying Of Shan Dong TV Station HD Broadcast Relay System Project

Compare with standard definition TV, high definition TV has 16:9 aspect, enhanced definition, enlarged color region, stereo or circle stereo which make TV better infectivity .It is a certain trend for HD(High definition)TV to displace SD(standard definition )TV. As a part of HD TV program system, the application of HD relay is more and more. IN lately international broadcasting relay, HD relay become mainstream. The 2008 Olympics in Beijing will adopt HD relay entirely. It is important task for TV engineer to use the chance to improve our HD relay level and study key technology.First, the text summarize HD relay' history and status, and analyses HD relay system' key technology, expatiate the standard of HD relay. Then Base on fact of our TV station, the request of The 2008 Olympics in Beijing and The 2009 national games in Shan Dong, we scheme out a resolve project of Shan dong TV station HD relay system, and bring into effect.After this work, a project of HD relay system testing is brought forward, and brought into effect. Shan dong TV station HD relay system hew to BOB (Beijing Olympics Broadcasting) HD OB VANS Specifications, insure satisfy the technical request of BOB. All HD relay system' coding format is 1080i/1920 50 (SMPTE 292 HD SDI).This system has many characteristics as follows:First use HD/SD adaptive switcher in HD OB VANS, in interiorly input HD and SD signal Simultaneity, Outputting HD and SD signal Simultaneity, Using FORMAT fusion technology to reduce down/ up converter, Solving the problem of system delay and HD/SD compatible, Audio system can produce Dolby Digital 5.1 Surround audio, use Dolby E technology to transmit Dolby Digital 5.1.The establishment of this system improves the program producing level of Shan dong TV station. HD relay system design, HD digital video technology, 5.1 Surround audio producing and transmitting technology, and HD-SDI measure technology is emphases of my study.This system has high dependability, according with standard, easy maintenance and upgrade, favorable application foreground.