In article ,
Telamon wrote:

I don't need to get an HD radio and drive around LA. This is just plain
physics. Information transmitted is determined by the amount of power
and bandwidth applied to a signal. You can not have a more reliable
transmittal of a signal on less power and bandwidth. Do you get the
picture?

As much as I dislike giving Mr. Gleason arguement points, you have to
consider that the psycho-acoustic compression schemes used in IBOC-AM
reduce the equivalent analog bandwidth down to a telcom grade signal,
(32-36 kBps = 3 kHz at [mumble 40 dB?] signal to noise ratio). Compared
to the 16-18 kHz of a high-fi AM broadcast signal. (Not than anybody
seems to bother anymore...).

On the other hand, there's going to be a quality loss with all the
gargling kazoo sound effects and other crap from de/compression.
Somebody need to come up with a formula that equates that distortion
to a Signal to Noise ratio.

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)