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Picture quality
http://forum.linhes.org/viewtopic.php?f=15&t=17132		 Page 1 of 1
Author:  yemo [ Mon Oct 29, 2007 2:56 pm ]
Post subject:  Picture quality
Here's some basics about my setup. I'm very likely leaving out something critical. If so please let me know.

I have both a myth box and a Sony DHG-HDD250 DVR connected to a 55" Sony LCD projection. The Myth box is outputting through an 5200 Nividia card through a DVI/HDMI cable at the TVs native resolution using the modeline:


Modeline "1344x728" 74.160 1344 1424 1464 1648 728 729 734 750 -hsync -vsync


Here's the issue:
Recording from the same OTA input, There is a noticeable difference in the picture quality between the two boxes, especially in solid or near-solid backgrounds, like sky, or a wall, anything that has blocks of solid color, the myth box seems more grainy, more noisy, I don't know what the correct term is, but the picture isn't as crisp as the Sony box is. I've tried several different modelines, which make a difference in the size of the picture and overscan to a degree, but the graininess remains.

I am running R5F1 currently. Any thoughts or suggestions would be appreciated.

yemo
Author:  Girkers [ Mon Oct 29, 2007 9:38 pm ]
Post subject: 
Yemo,

You may want to check your profiles as I think the defaults are set for good old analog.

Check the settings under: Utilities/Setup -> Setup -> TV Settings -> Recording Profiles -> MPEG-2 Encoders and make sure that you have them set to the signal, eg. SD is 720x480 (NTSC) or 720x576 (PAL)
Author:  yemo [ Tue Oct 30, 2007 7:24 am ]
Post subject: 
Girkers,

I don't think that's the issue. I'm definitely recording digital signals. I've got both boxes set up to only receive digital channels. A

Because of that, I'm 99% sure this is something with displaying the picture rather than receiving or transcoding.

Thanks for the help.
Author:  mogator88 [ Tue Oct 30, 2007 7:45 am ]
Post subject: 
Is 1344x728 the native resolution of the TV? If not, that could be the problem or part of it.
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