数字高清晰度电视地面广播传输

Terrestrial Broadcast Transmission of Digital HDTV Signals

本文简要讨论了美国ＦＣＣ提出的对ＨＤＴＶ地面广播传输的基本要求，概述了美国与欧洲的几套ＨＤＴＶ传输方案的特点，论述了地面广播信道的特性。文中着重介绍基于ＶＳＢ的ＧＡ方案和采用ＣＯＦＤＭ的传输方案，并介绍了纠错编码、调制、均衡的新理论和新技术在ＨＤＴＶ地面广播传输中应用。

With a brief discussion of the fundamental requirement of FCC(U.S.A)on the terrestrial broadcast transmission of digitized HDTV,propertties and techniques of some proposals of U. S.A and Europe are summarized in this paper,the features of terrestrial broadcast channel is also discribed.In this paper the emphasis is placed on the discussion of GA scheme and COFDM for HDTV transmission. Some recent research trends on HDTV transmission are briefly described in this paper.