In article
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gallant17 wrote:

Radio World to Ibiquity: Reconsider AM HD

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It's akin to what's happening with the war in Iraq, as one former
"cheerleader" of the cause after another changes their tune.

One of the biggest cheerleaders of all things HD (and Ibiquity), Radio
World Magazine, has, in an editorial in the latest issue, changed
their mind about AM HD. They cite coverage issues (reports of people
being able to see the damn tower(s), but not receive the signal),
numerous stations which have abruptly stopped transmitting (AM) HD
because of interference reports from neighboring stations, and studies
which indicate that AM HD will turn the lucrative "cash cow" signals
of 50kw flamethrower outlets owned by Clear Channel, Infinity, etc.
into cash poor calves...with signals which are a shadow of their
former selves. This last point, plus the fact that there is still no
nighttime authorization for AM HD, is what Radio World believes is
stalling adoption of AM HD even by the large broadcasters who have
championed it.

Yeah they got the night time authorization but after one week most
stations turned it back off nights due to the huge amount of
interference.

While lower power, local AM stations are in trouble, big-signal 50kw
am outlets are anything but. They often dominate their markets, with
more audience share and cash-flow than any fm music station. The idea
of reducing coverage area (with increased interference...which is now
no longer theory, but established in practice by several big-signal
stations which have ceased HD operation) in order to present TALK
programming in "HD" is quite nauseating to station owners.

For these reasons, Radio World now urges Ibiquity to form an alliance
with DRM (Digital Radio Mondiale), and rethink AM HD...choosing a
system that's both more robust, AND causes less interference. Talk
about an about face!

SNIP

The only problem here is that DRM is no better than IBOC. This is not
rocket science. I told the readers of RRS years ago that these schemes
would work poorly. In past posts I outlined what the problems would be
and they have all come to pass. I was able to do this as a natural
consequence of those systems specifications. These systems suck as they
do not use enough bandwidth to provide the quality of service along with
improved sound quality. You have to have bandwidth and power to create a
solid communications link.

Ibiquity and the DRM consortium will lie right to your face because they
have an investment in the technology. These groups are just a bunch of
pointy haired marketing and management idiots.

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Telamon
Ventura, California