In this study, we’ve analyzed and compared three major DTTV (Digital Terrestrial TV) systems around the world, which are the DVB-T2 by EBU in the Europe, the ATSC 3.0 by FCC in the US and South Korea, as well as the next generation ISDB-T2 which is currently developed by NHK in Japan. A draft version of “the UHDTV Technology Specifications for the Terrestrial TV Stations” is proposed for the regulator to consider as the next generation UHDTV regulations. In this draft UHDTV Specs, we’ve included all three standards before the regulation policy is confirmed.