[mythtv-users] Possibly a "dumb" question
Jim at Morton.hrcoxmail.com
Fri Feb 5 16:28:23 UTC 2010
Brian Wood wrote:
> On Friday 05 February 2010 08:40:52 am Jim Morton wrote:
>> Can someone explain this to me? I just don't get it...
>> Myth records shows as mpeg or whatever is being broadcast with no
>> decoding or other changes effectively capturing it unaltered.
>> During playback, Myth has a myriad of ways to process and render
>> video/audio to then deliver to the TV.
>> Why can't it just stream the exact file to the TV and let the TV tuner
>> receive/decode/render/interlace/deinterlace it. In other words hand it
>> to the TV exactly as it were broadcast.
>> I believe cable boxes do just that. Provide the broadcast stream on
>> channel 3 or 4 and let the TV deal with it.
> If you mean a cable STV outputs ATSC, just like it would be received off the
> air? I don't think so. Those I have seen output baseband video as composite,
> S-Video or component, or RF modulated as NTSC.
> ATSC modulators are still expensive, much more than the entire STB, and cable
> operators are cheap.
>> The TV should not know any difference between live OTA, live cable, and
>> a playback of a recording from Myth...
> Most of us use the DVI, HDMI or VGA connector to connect the frontend to the
> TV set, and nobody I am aware of outputs ATSC from their frontend.
> No TV set I am aware can accept ATSC as anything other than RF.
Take OTA for example. The best picture I have ever seen on any TV was
from an antenna connected directly into a coax input of an HD TV.
Stunning, crystal clear with a visible depth to the picture.
I guess it is not possible to capture _exactly_ what an antenna delivers
(ATSC - RF?) and then send it back out on the coax at a later date... I
suppose what I am glossing over is the role that the tuner plays to pick
out just one channel and I suppose that also alters the signal such that
it can't just be "put back on the wire" later.
It just seems such a waste to not be able to use the tuner built into
Thanks for all the replies. I think I get it now.
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