Re: How to set up PAL widescreen TV properly?
From: Stephen Neal (stephen.neal_at_nospam.as-directed.com)
Date: 12/18/04
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Date: Sat, 18 Dec 2004 15:17:36 -0000
"Nigel Barker" <nigel@hp.com> wrote in message
news:td56s0dv9483aud2lke6546g5hk8q2bcbg@4ax.com...
> On Fri, 17 Dec 2004 12:53:55 -0000, "Stephen Neal"
> <stephen.neal@nospam.as-directed.com> wrote:
>
>>You can also use a VGA->RGB SCART cable and Powerstrip to feed a normal
>>European 16:9 TV with an RGB SCART. I am running such a solution with my
>>Radeon 9600 - I have a 1024x576/50i display configured, so Windows is
>>running "square pixels" 16:9 - meaning you get an extra bit of info in the
>>TV Guide and another column of Albums in the My Music section.
>
> Did you ever get a quote from Keane for fabricating a cable for you?
Yep £30 for 2m, no audio. Have ordered, was delivered the wrong cable by
mistake (they were amazingly apologetic), and am now awaiting re-delivery of
the right cable.
£30 didn't seem to bad for a decent quality custom built cable (the one
supplied has a moulded VGA cable with a metal housing SCART plug - not a
cheap plastic one, but didn't have a pin 9 in the VGA connector, so couldn't
have derived the pin 8 status and pin 16 RGB fast blanking voltages for the
SCART...)
My home made cable is still working - though the cheap SCART plug is a bit
intermittent. I think I could improve further on my Powerstrip settings,
and possibly tweak the MPEG2 decoding settings a bit. Might try the Win DVD
over the nVidia if I get time over Christmas.
Currently the only "less than ideal" issues are :
1. Occasional frame jumps - I guess caused by the video card refresh rate
not being locked directly to the received video refresh rate. I've tried
Reclock which is supposed to help with this, but it doesn't improve things,
and the audio loses sync massively.
2. Slight de-interlacing / re-interlacing non-linearities. I am convinced
the PC is de-interlacing to progressive internally, and then re-interlacing
on display. I had hoped that a 720x576 anamorphic input, displayed on a
1024x576 windows display, would create a perfect 1:1 mapping . However there
seems to be a slight scaling going on somewhere. When you see flash
photography on the news (which I take to be present in only one field?) -
you get some odd line combing artefacts. When I flip the nVidia
de-interlace settings to FILM (which I presume effectively defeats the
de-interlacing and merges both fields into the frame) I get horrid
tearing/scaling artefacts, implying there is some scaling going on
somewhere. I suspect that somewhere a slight scaling to 575 may be going
on - though this is just a guess. I suspect if I created a test motion DVD I
could see where the tearing was and hazard a guess at the scaling factors
involved!
Under most viewing conditions neither 1 nor 2 are major issues, and the huge
improvement over S-video and the TV-out processing is more than enough to
justify sticking with it!
Certainly the overscan cut-off issues are liveable with in MCE 2005.
Steve
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