[BC] Re: RE: That Guy at the PAB who inspected Dana Puopolo'sStation

[Mike McCarthy]

Don't know....

I think that's something which needs further exploration.

MM

At 03:06 PM 3/4/2009 -0500, Mark Humphrey wrote
>On Wed, Mar 4, 2009 at 8:48 AM, Mike McCarthy <Towers at mre.com> wrote:
> > High data
> > compression coding WILL corrupt the EAS AFSK integrity resulting is missed
> > decoding. We instead opted for voice grade cards which are linear.
> >
> > I suspect the backfed monitored stations were sent by a highly compressed
> > path and as a result, the tests sent were not decoded because the audio was
> > so deeply "distorted" from the compression. There are some things which
> > compression is actually harmful. AFSK encoded "data" is one of them.
>
>So should we be concerned about decoding EAS transmissions from a
>station using the HD codec at 48 kbps or less?   Have any tests been
>run on this codec at the low rate used for AM IBOC to prove it is
>still a reliable way to carry EAS FSK data?
>
>Mark