Wait, to be clear, this 'dedicated return channel' is just for TVs to broadcast back to the station that they're watching the adverts? I thought ATSC 3.0 was going to rely on IP backhaul for that. Actually broadcasting back seems... impractical at best.
I mean, let's keep in mind, even ATSC 1.0 had really awful reception issues; compared to analog NTSC where there was enough redundancy that you could just tune into a garbage station from way too far away and see something. Now imagine trying to make that already unreliable channel bidirectional. I just really hope all the return channel stuff is optional, because it sure as hell isn't going to work without way more stations broadcasting on more channels, and OOPS you've reinvented LTE.
I mean, let's keep in mind, even ATSC 1.0 had really awful reception issues; compared to analog NTSC where there was enough redundancy that you could just tune into a garbage station from way too far away and see something. Now imagine trying to make that already unreliable channel bidirectional. I just really hope all the return channel stuff is optional, because it sure as hell isn't going to work without way more stations broadcasting on more channels, and OOPS you've reinvented LTE.