[mythtv-users] Possibly a "dumb" question
Jim Morton
Jim at Morton.hrcoxmail.com
Fri Feb 5 16:56:22 UTC 2010
James Oltman wrote:
>
> I think you are confusing what the tuner can "magically" do versus the
> signal quality. By design, ATSC signals over the air are going to be
> a better picture than over your cable system. It really has nothing
> to do with the tuner. Cable companies HIGHLY compress their stream
> because they don't have the bandwidth available on the wire. ATSC OTA
> signals are mostly at a bitrate of 19Mb/s (which is the highest that
> ATSC can do IIRC). That's why you get a better picture with less
> pixelation.
>
> Jim Oltman
No, quality was not really a consideration. I was wanting to simply
capture the signal _exactly_ as it arrives at my house, record it, then
put it back on the wire later. (Whether OTA or cable is irrelevant but
for the purpose of this discussion I was using OTA as the example.) The
quality would be determined at the source and would not be affected at
my end assuming I could deliver the _exact_ same signal to the TV. The
TV has a digital tuner so it would be like running the antenna cable
directly to the TV and feeding it what was broadcast at a previous time.
The part I didn't understand or didn't fully consider is that whatever
the tuner does to the signal it receives would then have to be reversed
with some form of very expensive modulator or other equipment.
--
_________________________________________________________
Jim Morton
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