ATSC 3.0 is the next generation terrestrial broadcast system designed from the ground up to improve the television viewing experience with higher audio and video quality, improved compression efficiency, robust transmission for reception on both fixed and mobile devices, and more accessibility, personalization and interactivity.
Please visit the website to get more info:
https://www.nexttv.com/news/atsc-3-0-nextgen-tv
https://www.atsc.org/nextgen-tv/