本文分析了数字电视传媒技术的发展,简述了高清晰度电视广播发展的现状与趋势,认为在新的媒介环境中再一次解读了麦克卢汉的媒介理论,即“媒介即讯息”、“媒介是人的延伸”等。这些观点和理论影响着人们对科技、媒介和生活方式的理解,在众多领域具有启发性。 This article analyzes the development of digital television media technology, briefly describes the status quo and trends of the development of high definition television broadcasting, and thinks that once again, McClusch’s media theory is interpreted in the new media environment, that is, “media is information” , “The media is a human extension” and so on. These views and theories influence people’s understanding of science and technology, media and lifestyle and are instructive in many fields.