http://www.ccrane.com/library/iboc.04.8.02.aspx
Turn on the radio and you won't hear much about IBOC. Why is that? I've asked around over the last few weeks, and talked with lots of different experts interested in the impact of digital radio in the US, and most people agree that IBOC is not reported on by the general media because it's just too technical. Well, when I look over the pages and pages of notes I have in front of me, it seems that it is a pretty technical issue - nevertheless, I think it's also something that more people should know about - especially any people who rely on radio for their news, information, and entertainment.