Where did this name come from? HD Radio? High-def? I mean, come on. Radio is inherently an aural medium, meant for the ears?
What's usually meant by, say, HD TV is high definition, which means higher resolution, more pixels, etc. It's also implied that high-def means digital, that is, the information is passed as 0's and 1's rather than as analog signals, and presumably with enough error correction so you don't miss anything.
This is where HD radio is "HD". It's digital. It's sent out as bits, and can, in principle, like the CD, give you high quality experience compared to vinyl.
Why not CD-quality radio? Or simply, digital radio?
Sigh.
Three opinions on theorems
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1. Think of theorem statements like an API. Some people feel intimidated by
the prospect of putting a “theorem” into their papers. They feel that their
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"In-Stat: Digital Radio Set to Take Off"
"In 2006, 73 percent of respondents to an In-Stat U.S. consumer survey were aware of HD Radio on some level."
http://beradio.com/eyeoniboc/instat-digital-radio-set/
"Sirius, XM, and HD: Consumer interest reality check" (Alexaholic)
"While interest in satellite radio is diminishing, interest in HD shows no signs of a pulse."
http://www.hear2.com/2007/02/sirius_xm_and_h.html#comments
This just confirms, the lack of interest for HD Radio, on Google Trends:
http://www.google.com/trends?q=%22hd+radio%22%2C+xm%2C+sirius&ctab=0&geo=all&date=all
"Rethinking AM's Future"
"Only 175 or so AM stations have even licensed AM-HD. For a number of reasons, quite a few have tried it and taken it off the air, or so the anecdotal evidence suggests. Ibiquity no longer reports in its public summaries whether a station is on the air."
http://www.rwonline.com/pages/s.0044/t.557.html
Existing RDS has the same texting functions, as HD/IBOC. For now, HD Radio/IBOC is dead.
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