Garrett posed the question, just what is HD Radio, exactly?
I guess, being in the industry, I have been blinded by the “everybody knows what I’m thinking about” bug.
Here is what HD Radio is, in a nutshell:
HD Radio is digital radio that is capable of broadcasting many different “channels” on one station.
Here is the bigger, dorkier explanation:
HD Radio is a new way of transmitting/listening to existing radio stations.
In the past, radio stations broadcasted analogously. Analog radio is bulky. It’s kind of like playing records instead of listening to an MP3 player. The bandwidth used by radio stations is not used to its full potential, and even though there is a lot of information plugging through the signal, the quality isn’t all that good.
IBiquity Digital Corporation, decided that what we’re used to wasn’t good enough. They developed a technology which allows stations to broadcast digitally, thus freeing up a ton of a station’s bandwidth to allow for other things. For instance, HD stations can now “multicast.” That is, they can have two (or more) stations on one signal. Imagine 92.5-1 and 92.5-2. With an HD radio, a listener would be able to listen to country on 92.5 channel 1, and let’s say chinese mandolin music on 92.5 channel 2. That is hypothetical, of course, we haven’t done a market study on chinese mandolin music, nor are we capable of HD broadcasting or even multicasting at this point.
There are many stations in Milwaukee that do multicast, though. I wouldn’t feel right plugging other radio stations on my website, though, so you are more than welcome to search for those stations on your own.
At the moment, listening to HD radio requires that a) the station you are listening to broadcasts in HD and b) you have a stereo capable of decoding HD radio. The stereos are priced ridiculously high right now, but they will come down. And, just like satellite radio, eventually every car you purchase will come stock with an HD radio - in fact, every radio/stereo you buy in general will be HD equipped.
Unlike satellite radio, by the way, HD radio is free to the listeners. It is just like regular radio, except there is more of a selection, and the sound quality is mp3-player like.
Also, since HD radio is local radio, radio stations can provide you with news/traffic/weather/other local information at the push of a button - in textual readouts on your car stereo display - or as audio alerts available to you at the push of a button. Really, the technology is limitless.
I encourage you to read more on HD radio, since eventually HD radio will be referred to as “radio.”
Here are some links for you:
iBiquity Digital Corporation
WikiPedia: HD Radio
HDRadio.com
And this link is a research project I did for school on HD Radio. Microsoft Word Document
Image above courtesy of HDRadio.com.