[mythtv] Best quality SD TV picture from DVB-T source

Nick Morrott knowledgejunkie at gmail.com
Mon Sep 22 00:09:34 UTC 2008

On 19/09/2008, Paul Gardiner <lists at glidos.net> wrote:
> I've just built a MythTV frontend using a J7F2 board and minimyth,
>  for driving an old SD but top quality CRT TV. Works great, except
>  the image quality is not as good as my old DVRs. From what I've
>  read, the loss of quality is partly the use of an S-Video connection
>  and is partly the processing of the interlace. I want to build
>  something better, but I just can't work out what my options are.

This isn't a -dev question, so if you want to carry on the discussion,
please bring it over to the -users list. The "devs" do read the -users
list, so may help with your quest :)

In the UK (PAL), I use a homebuilt RGB SCART cable, which takes the
VGA output from my ATI Radeon card (running at very low dot clock),
and outputs an RGB signal straight into my big Sony Wega CRT (audio
via SPDIF to a receiver).

I use deinterlacing (because getting the interlacing perfectly
synchronised without tearing is either very difficult or impossible,
depending on video card capability) and think the picture is very good
for DVB-T recordings which have zero noise (unless encoded within the
picture). The frontend machine in question in not particularly
high-powered, so I only use the kernel deinterlacer. The difference in
moving from a composite/S-Video signal to RGB was very noticeable.

Nick Morrott

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