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<div class="moz-cite-prefix">On 6/10/23 16:13, James Abernathy
wrote:<br>
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cite="mid:CANFv2E=5jK5nULM1AegZLB=nL4_gOsC_yQDH4CMRn0QT4kjgYw@mail.gmail.com">
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<div dir="ltr" class="gmail_attr">On Sat, Jun 10, 2023 at
6:30 PM Ken Mandelberg <<a
href="mailto:km@mathcs.emory.edu" moz-do-not-send="true"
class="moz-txt-link-freetext">km@mathcs.emory.edu</a>>
wrote:<br>
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<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">I'm trying to understand
4K TV. I'm in the US and use Xfinity, <br>
independently with MythTV via HDHomerun cable box, and for
On Demand and <br>
SVOD their X1 DVR.<br>
<br>
I have been happy with my 40" 1920x1080 native TV and have
been ignoring <br>
4K, but recently I experimented with a projector with the
same HD native <br>
resolution projecting a 90" diagonal image. It was OK, but
at that size <br>
from 7 feet away the sharpness defintely was a bit
disappointing. I <br>
presume that no matter what the source that projector's
resolution would <br>
be a limitation.<br>
<br>
That made me wonder if even with a higher native res
projector, or a <br>
larger 4K TV whether the media would become the limitation.
That raised <br>
the questions<br>
<br>
* What 4K programming is there over Xfinity cable. Is it
just a few <br>
premium channels and no broadcast networks.<br>
<br>
* Can the HDHomerun Cablecard box deliver "ts" files at 4K
resolution?<br>
<br>
* Can the mythfrontend on Linux generate 4K HDMI output from
the ts files?<br>
<br>
* Same question for Leanfront on a 4K firestick.<br>
<br>
</blockquote>
<div><br>
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<div>Cable TV has been scrambling to hold on to their
viewers. I think you may be the last one I know of :-)</div>
<div><br>
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<div>Around here a lot of cable TV guys are only supplying the
Internet and have a streaming app for what they used to
offer with a cable box.</div>
<div><br>
</div>
<div>Most cable boxes I know of don't do 4K and most cheat at
1080i compared to over the air.</div>
<div><br>
</div>
<div>mthfrontend doesn't do 4K AFAIK. However, on my UHD 4K
TV I have connected a PC running 4k that uses its own image
enhancement to improve the quality of the original HD
signal. At least I think it does. Looks great.</div>
<div><br>
</div>
<div>Leanfront on the Firetv is the best picture I get from
mythtv, but the original content is only HD, so it's good,
but technically not 4K. Firetv does great with 4K sources
like NetFlix, etc.</div>
<div><br>
</div>
<div>Jim A</div>
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</blockquote>
<p>4 K so for is only available via streaming, or 4K bluray disks.</p>
<p>ATSC 3.0 is supposed to support 4K over the air, but so far I
have not seen any broadcast.</p>
<p>But even if you have a tuner that supports ATSC 3.0, (HDHomeRun),
and stations in your area are broadcasting ATSC 3.0, mythtv seems
to ignore them. Even though manually scanned with HDHomeRun
Config, they show up, and my TV gets them, mythTV misses them in
the channel scan. I do not know if this is a deliberate decision
or a bug.<br>
</p>
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