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Old 11-20-06, 09:33 AM   #1
falela
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Default PAL TV-out distortion

Hi, i am using driver Linux AMD64 1.0-9629 on my 7600GS. After playing around for a week or so, I finally got my TV-out to display PAL-I 720x576 on my SD 29'' flat screen TV. (found out that a cloning TwinView of CRT/TV doesn't work with 720x576 on the TV, LCD being standard resolution). After going solo on TV-out, I finally got it. However, the image is tilted a bit and the 4 corners are all blurred (actually the whole screen is a little bit blurred, but the corners are the worse). Also, I got this bulging region on the left side. Is there any way to fix these problems?

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Old 11-20-06, 12:24 PM   #2
Thunderbird
 
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Default Re: PAL TV-out distortion

The image quality of TVout is in general 'poor' but that's mainly because the television standards are limited, so it is normal that things are blurry, that the screen flickers, that you don't have a fullscreen image and things like that. Besides for crappy television standards all televisions are different, tvout chips are build in such a way that they try 'their best' to output an image that works reasonable for everyone.
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Old 11-20-06, 12:47 PM   #3
pe1chl
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Default Re: PAL TV-out distortion

Quote:
Originally Posted by falela
Is there any way to fix these problems?
Does your TV have a VGA, DVI or HDMI input?
If so, use that instead of the PAL input. Although this is usually not troublefree either, you will get much better results than possible with PAL.

When there is no input like that, but there is a SCART-RGB input, get a VGA to SCART converter and use a VGA output on your videocard. (skipping the TV-OUT feature)
Although this is one step below VGA/DVI/HDMI, it is still way better than PAL.

The TV-OUT feature really should be used only for very simple or old TVs that do not have a suitable input.
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Old 11-20-06, 08:38 PM   #4
falela
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Default Re: PAL TV-out distortion

My TV has only composite, svideo & component input. Would the HDTV out through component cable on my Asus EN7600GS help? mine is a SDTV though.
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Old 11-21-06, 03:50 AM   #5
pe1chl
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Default Re: PAL TV-out distortion

Quote:
Originally Posted by falela
My TV has only composite, svideo & component input.
What market (country) is that TV made for?

In your case the component input is the best quality. I think it should work, with the proper settings.
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Old 11-21-06, 05:55 AM   #6
falela
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Default Re: PAL TV-out distortion

I am in Hong Kong.
Will try it tonight.
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Old 11-21-06, 12:05 PM   #7
pe1chl
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Default Re: PAL TV-out distortion

Quote:
Originally Posted by falela
I am in Hong Kong.
Aha, apparently a PAL country with US-style interfacing standards.

Here in Europe (PAL origin) we usually have (SCART) RGB on TV sets, and in the US and Japan (NTSC origin) there is component-video.
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Old 11-21-06, 08:37 PM   #8
falela
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Default Re: PAL TV-out distortion

Quote:
Aha, apparently a PAL country with US-style interfacing standards.
pe1chl, what do you mean by this?
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Old 11-22-06, 04:17 AM   #9
pe1chl
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Default Re: PAL TV-out distortion

Quote:
Originally Posted by falela
pe1chl, what do you mean by this?
What is written in the line below. When browsing TV specs I usually saw the combination of PAL + SCART RGB (what we have here) and NTSC + component (US Style, i.e. with cinch connectors) but never the combination that is apparently used in your country.

But did using component solve your problem?
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Old 11-22-06, 10:02 AM   #10
falela
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Default Re: PAL TV-out distortion

Never saw anything with the SCART input over here.

To answer the question. No. component output doesn't fix it. Seems like X11 doesn't have anything to do with the distortion, since this happens when in BIOS POST and GRUB. it's probably a hardware thing.

Another crazy problem crops up when I use component out and TVFormat "HD576i", my keyboard stops functioning . Don't know why, and probably too lazy to find out the cause.

Well, guess this is the final verdict. The only choice is to get a LCDTV, then. But that definitely needs the approval from my chief financial officer (that is, erh, my wife)

Thanks for your help
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Old 11-25-06, 05:30 AM   #11
falela
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Default Re: PAL TV-out distortion

Just found out that my dvd player/recorder has a SCART input, do you think the VGA>SCART cable works through this player to TV?

Now, just need to find where to buy this piece of cable over here.
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Old 11-25-06, 06:14 AM   #12
pe1chl
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Default Re: PAL TV-out distortion

It is not useful to connect to the dvd recorder via SCART because then you still need to connect from the recorder to the TV.
The quality would still be determined by the TV.

Your TV probably has issues with synchronization or EHT stability, and will not be able to display undistorted images with high contrast. This is quite common.
When you want better quality, it is advisable to look for a better TV. Preferably with VGA or DVI input so you can connect it to the PC without using TV-OUT.
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