When they finally closed the inquiry 10 years later, advanced TV got transmuted to DTV, and DTV was mandatory so everyone would switch to it and balance the budget. I am not making this up. Color wasn't mandatory. Stereo wasn't mandatory. DTV transmission is.
Reception is something else entirely.
That was the sound of switchin' gears. Here's what happens when ya use an antenna. You either get acceptable pix or ya don't. You're almost always gonna get sound, and you'll probably see somethin' - even on an indoor antenna. Get up and fool with the antenna.