Immersive Audio Still A Work In Progress For NextGen TV
Most of ATSC 3.0’s audio delay in the U.S. is attributable to the same factors that have held back the rollout of UHD content: there is still a small base of NextGen TV-capable sets; the distribution chain from networks to stations is not fully ready for new formats; and broadcasters are somewhat hamstrung in experimenting with their 3.0 content because of FCC rules that require them to effectively simulcast their 1.0 programming. But despite that, progress is being made.
Source: tvnewscheck.com