Re: HD RADIO is no worse than DAB or DRM radio

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Article #669

#669

From: Earl Kiosterud
Date: Tue, 02 Oct 2007 21:34

39 lines
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I read once that AM radio in the US was allowed up to 15 KHz, but the NRSC standard, adopted 
by the FCC, calls for a limit of 10 KHz.  THat's only about a half octave from the 15 KHz 
limit of FM, and sounds pretty OK, certainly better than rendered by most AM radios.

-- 
Regards from Virginia Beach,

Earl Kiosterud
www.smokeylake.com

    Note: Top-posting has been the norm here.
    Some folks prefer bottom-posting.
    But if you bottom-post to a reply that's
    already top-posted, the thread gets messy.
    When in Rome...
-----------------------------------------------------------------------
"SFTV_troy" <SFTV_troy@yahoo.com> wrote in message 
news:1191142530.836678.65260@r29g2000hsg.googlegroups.com...
>
> Earl Kiosterud wrote:
>>
>> I think the USB to which Tom refers is upper sideband.  Converting AM stations would mean
>> they'd transmit only one set of sidebands, the upper set, reducing the bandwidth to 
>> almost
>> half.  More stations could be licensed in the same band.  ...
>
>
> But still have the same poor AM sound.  Digital offers an upgrade to
> near-FM quality.
>
>> As a side issue, the loss of fidelity for which AM is notorious is largely in the 
>> receivers,
>> with their narrow bandwidths, resulting in audio that is rolling off pretty fast around 
>> the
>> 5 KHz point.  (AM stations actually transmit a fairly high-fidelity signal.)
>
> How high?  0-10000 hertz?  That's not as good as the 0-15000 possible
> with AAC+SBR.
>

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Subject: Re: HD RADIO is no worse than DAB or DRM radio
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