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1 引言随着数字电视离人们越来越近,与数字电视技术密切相关的一些技术标准也越来越为人们所熟悉。目前,全球数字电视广播有三个相对成熟的标准:欧洲的DVB、美国的ATSC和日本的ISDB,其中欧洲的DVB、美国的ATSC占主导地位,而DVB标准应用最广泛、最灵活。DVB标准主要包括数字卫星电视(DVB-S)、数字有线电视(DVB-C)和数字地面广播电视(DVB-T)三个传输标准,这三个标准编码方式相同,都是MPEG-2的
1 Introduction With the digital television closer and closer to people, digital TV technology is closely related to some of the more technical standards are also more familiar. At present, there are three relatively mature standards for global digital television broadcasting: DVB in Europe, ATSC in USA and ISDB in Japan. Among them DVB in Europe and ATSC in USA dominate, while DVB standard is the most widely used and most flexible. The DVB standard mainly includes three transmission standards of digital satellite television (DVB-S), digital cable television (DVB-C) and digital terrestrial broadcasting television (DVB-T). The three standards are encoded in the same way and are MPEG-