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Re: [IRCA] Layer Announces All-Digital AM Co-Channel Lab Test Results

Rick:

Hybrid AM IBOC uses a 20 kv/s codec. In testing, about half of listeners said they would discontinue listening to it.

All digital IBOC AM  can use a 40 or 60 kb/s codec. The quality is distinctly better for the 60 kb/s coder: only 1 in 7 listeners would discontinue listening to it.
 
There's a sharp increase in perceived quality at 48 jb/s and up.

I don't know what mode (40 or 60 kb/s) was used for the KRKO tests. I'm not sure they revealed that info but I no longer have any professional ties to that arena so didn't read every word.

Chuck
________________________________________
From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Rick Lewis <ricklew@xxxxxxxxxxxxxx>
Sent: Friday, April 29, 2016 6:25 PM
To: 'Mailing list for the International Radio Club of America'
Subject: Re: [IRCA] Layer Announces All-Digital AM Co-Channel   Lab     Test    Results

Hi Chuck,
More robust? I'll grant that. But in the demonstrations done here, I didn't
find the sound to be better. The same? Yes. Better, no.
Unless those tests weren't done in a way that would show the potential of
all-digital IBOC.
--
Rick

-----Original Message-----
From: IRCA [mailto:irca-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Chuck Hutton
Sent: Friday, April 29, 2016 5:34 AM
To: Mailing list for the International Radio Club of America
<irca@xxxxxxxxxxxxxxxx>
Subject: Re: [IRCA] Layer Announces All-Digital AM Co-Channel Lab Test
Results

It should be mentioned that all digital IBOC sounds better than hybrid IBOC
and is more robust. The question is whether it is good enough to spark more
interest and then more interest sparks more receivers. Or: the FCC does
something to force the issue, an unlikely possibility given their lack of
desire so far.

Chuck

________________________________________
From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Russ Edmunds
<wb2bjh@xxxxxxxxx>
Sent: Friday, April 29, 2016 10:45 AM
To: Mailing list for the International Radio Club of America
Subject: Re: [IRCA] Layer Announces All-Digital AM Co-Channel Lab Test
Results

Going to all digital might or might not solve interference issues but the
cost for stations to do so coupled with the lack of interest already and the
lack of receivers would indeed likely be the final nail in the coffin.

Russ Edmunds
15 mi NW Phila
Grid FN20id
<wb2bjh@xxxxxxxxx>

AM: Modified Sony ICF2010's (2) barefoot w/whip
FM: Yamaha T-80 & T-85, each w/ Conrad RDS Decoder; Onkyo T-450RDS; Tecsun
PL-310 ( 2); modified Sony ICF2010 w/APS9B @ 15'; Grundig G8 w/whip;
modified Sony ICF2010 w/whip


On Fri, Apr 29, 2016 at 3:13 AM, Patrick Martin <mwdxer@xxxxxxxxx> wrote:

> My take on this, is total suicide of AM Radio, if they move to All
> digital. Few HD radios available if someone wanted to buy one and more
> is moving to streaming.
>
> Patrick Martin
> Seaside OR
> KGED QSL Manager
>
> > From: wb6tnb@xxxxxxxxx
> > Date: Thu, 28 Apr 2016 13:11:31 -0700
> > To: irca@xxxxxxxxxxxxxxxx
> > Subject: [IRCA] Layer Announces All-Digital AM Co-Channel Lab Test
> Results
> >
> >
> http://www.radiomagonline.com/industry/0003/layer-announces-alldigital
> -am-cochannel-lab-test-results/37709
> >
> > Sent from my iPad
> > _______________________________________________
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Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers

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