And here I was initially going to ask what a "digital converter box" might be.....
However, upon further reading of the OP: people still use antennae?????
I haven't known anyone for the past 10 years or so who doesn't receive TV digitally.
Yes, people still use antennae. Because some of us working poor, have a strange adversion to paying unnecessary monthly fees, because of their tendency to too fastly drain our meager bank accounts.
But digital technology is quite pervasive, even intruding into people's old crappy rabbit ears. My antenna was free. My Dad dug it up out of his cluttered basement. Actually, bunny ears is the only way I can really watch HD on my HD TV. I have no other HD-quality source. DVDs aren't really HD, except for that stupid format war between overpriced/limited-selection HD DVDs and Bluray. The news reported something about how many millions of Americans think they are watching HD, but who aren't. Merely having an HD TV isn't enough. You must also have HD shows, HD signal source, proper digital or at the very least component cables with the Red, Green, and Blue triple video connectors, to watch HD. Every step of the way, must be HD or it isn't HD. Even "upconverting" DVD players can't really add data that isn't there to begin with. All they can do is enhance and interpolate.
Anyway, the technology, and the myriad of connection standards, is very complicated and bewildering to the average consumer.
A digital converter box, can't add digital quality to an old TV set. It's still limited by the old analog standards. It just makes the new signals watchable on an old TV set. It's not really that "new" of an idea, supposedly. We had "converter boxes" with the addition of UHF channels, the RF connection from VCRs, and of course, the typical cable boxes or satelite receivers. And just because one may receive "digital" cable or "digital" satelite signals, doesn't mean one's TV receives digital signals. That "digital" there, only means more channels or whatever, and a few "digital" features, say like maybe some fancy channel guide or something. You even have to have a digital connector to a receiver, to do surround sound, which I decided not to bother with. I have but only 2 ears, so why can't sterio be good enough?