Firstly, this paper generally introduces the development of HDTV at home and abroad, and expounds the principle of the OFDM and the COFDM scheme of the HDTV broadcast transmission system.

• 本文首先介绍了国内外高清晰度电视发展的概况，阐述了OFDM原理和高清晰度数字电视广播系统的COFDM方案。