HD TV is probably infiltrating your known-zone these days. High Definition. It looks great on bigger screens. All stations have to be broadcasting it by February 2009. 42 inch screens are just about to slip below $1,000.

However, there is also HD Radio. Here, HD means Hybrid Digital. (That’s what you get in free enterprise naming …) It promises to bring you FM radio as clear as CD sound, and AM radio as clear as FM. In addition, each current signal (station) can broadcast 2-3 sub channels, along with text information. Thus, on 102.1 the local classical station, I can get Mozart, or Ravel at the same time, clicking between them. And, the LED screen of the radio tells me what is being played.

And, best of all, it is free — unlike the Satellite radio competitors. Not free of ads, of course, but free of monthly charges.

So, I confess, I bought one. Radio Shack has a couple of models and you can find table top and automobile equipment from various vendors. I got a car/home kit from Visteon, called the HDJump.

It isn’t cheap — over $100, perhaps into the $250 range, depending. But so far I like it. The sound is nice and crisp. If the digital is too weak, or doesn’t exist the radio picks up standard Am and FM. If digital comes into range it shifts seamlessly to it.

There’s certainly no hurry as most stations aren’t broadcasting in HD yet, but there are federal mandates to move that way, as well as economic and market reasons for the owners.

It may be too much to ask but given that the channels will be doubling or tripling in the next few years, could we get some reasonable news, commentary, science, history up on the airwaves?

For a look at your area and to see what is being offered HDRadio.com is a good place to start.