Can someone explain how this works?

[HeyGuy]

<p>I read this article about HDRadio and I'm so confused. How could this work even with a special radio? I mean if you listen to 103.5 fm how could 4 different stations all work on one station and how do you choose what you will listen to?</p><p>I think I'm retarded on this one but would love to have a radio person explain it to me.</p><p>&nbsp;</p><p><a href="http://news.yahoo.com/s/ap/20060801/ap_on_bi_ge/digital_radio">http://news.yahoo.com/s/ap/20060801/ap_on_bi_ge/digital_radio</a></p>

[SatCam]

HDRadio is a digital signal that's broadcast on the unused portion of the frequency's bandwidth. The seperate HD units that you buy can take out and decode the digital signals. The problem is that the radios are very expensive, and you already have cheaper solutions (offering better quality and more selection) such as satellite radio and internet radio.

A lot of people on the NYRMB will tell you it's the best thing since sliced bread, but right now there don't seem to be many adopters on the consumer end. The radio stations seem to love it though...

[KC2OSO]

From a tech standpoint, it's like an Oreo.&nbsp; So far you've been
listening mostly to the creamy center of the cookie with just a bit of
the outside chocolate cookies on your regular FM radio.&nbsp; HD will
make use of both chocolate cookies (sidebands) on the outside to carry
more information.&nbsp; The good thing is that your <em>old</em> radio will not become obsolete with HD.&nbsp; <a href="http://www.hd-radio-home.com/hd-radio-technology.html" target="_self">Here's</a> a good technical explanation.<br />

[Freakshow]

now i'm starvin'

[HeyGuy]

<strong>KC2OSO</strong> wrote:<br />From a tech standpoint, it's like an Oreo.&nbsp; So far you've been listening mostly to the creamy center of the cookie with just a bit of the outside chocolate cookies on your regular FM radio.&nbsp; HD will make use of both chocolate cookies (sidebands) on the outside to carry more information.&nbsp; The good thing is that your <em>old</em> radio will not become obsolete with HD.&nbsp; <a href="http://www.hd-radio-home.com/hd-radio-technology.html" target="_self">Here's</a> a good technical explanation.<br /><p>Now I understand it a lot better. But I also need some milk</p>