[mythtv-users] Re: 1000th picture quality question

Andrew Close aclose at gmail.com
Tue Mar 15 21:27:07 UTC 2005


On Tue, 15 Mar 2005 13:23:17 -0800, Ross Campbell
<ross.campbell at gmail.com> wrote:
<snip>
> 
> Here's a list of many of the things I've experimented with:
> 
> - output to monitor using VGA to compare absolute color and image
> sharpness, if much better with this, try different
> methods/converters/cables for TVout --> TV
> - direct cable/signal connection with no splits and short high quality
> cables to tv card input
> - upgrade/downgrade your video driver and hack on the config files to
> optimize for the best resolution and refresh rate for outputting
> recorded TV
> - experiment with mythtv deinterlace options as well as recording
> quality and resolution
> - disable any automatic power management in Linux kernel or bios that
> revs fan up and down to see if that reduces RF interference
> - upgrade to latest ivtv version to see if that address any issues
> - try different versions of firmware for your decoder card
> - try a different decoder card (my M-179 had poor quality compared to
> my pvr-250)
> - power conditioning for your mythtv box (couldn't hurt...)
> - try a different graphics card
> - try a signal filter or booster for your cable in
> - try moving your tv card to another slot in your motherboard to
> decrease RF interference inside your case
> 
> I don't know if additional shielding or shielding the whole TV card
> inside of a mythtv box would make any difference, but I would be very
> interested if anyone had tried it and got a cleaner signal.

and don't forget to wear your tinfoil hat while doing each of these steps. ;)

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