RGB to SCART Video * solved *

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genetika
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RGB to SCART Video * solved *

Postby genetika » Sat Apr 06, 2019 11:57 am

Hi.
I'm using an RGB to SCART video.

If I launch the QUILL application I see the pefect picture,
but before executing QUILL I'm not able to see three characters on the left
of the monitor/tv.

Is it normal?

Thanks!
M.
Last edited by genetika on Sat Apr 06, 2019 9:44 pm, edited 1 time in total.


Andrew
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Re: RGB to SCART Video

Postby Andrew » Sat Apr 06, 2019 12:30 pm

It's normal. QL uses overscan, so all TVs are loosing a few chars left and right. (On my Hitachi 24HB4C05 TV I only loose 7 pixels left and right - and so far this is the best TV I have seen for using with a QL )
That is why in monitor mode the QL has 85 columns, while in TV mode only 74.
Quill is just not using the full width of the monitor and that is why you can see the whole pic.


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Re: RGB to SCART Video

Postby genetika » Sat Apr 06, 2019 9:41 pm

Solved with a scaler ! :P
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Dave
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Re: RGB to SCART Video * solved *

Postby Dave » Sun Apr 07, 2019 6:58 am

Some people are ok with scalers. Others find them too fuzzy.

A matter of personal preference.


stephen_usher
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Re: RGB to SCART Video * solved *

Postby stephen_usher » Sun Apr 07, 2019 9:24 am

Those cheap scalers are OK, though it depends upon the TV as to whether they will display the extra characters, most don't.

As for scalers being "fuzzy", well the cheap ones (which are really designed for video) do rubbish interpolation and also erroneously sharpen the image, so they don't look very good.

If you try and OSSC, which does cost a lot more but is worth it, it's better than you'd get with a TTL RGB display.

e.g.
IMG_1201.jpg


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tofro
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Re: RGB to SCART Video * solved *

Postby tofro » Sun Apr 07, 2019 10:07 am

I have tried OSSC.

The picture I get with a cheap Chinese scaler on a cheap Chinese PC is way better than from OSSC together with an expensive NEC Multisync - So your mileage may vary.

It is, however, a bit of a lucky game with the Chinese scalers whether you get them to work properly with your specific QL and your specific TV. I have found that cheap TVs are much more tolerant to weird HDMI monitor signals the scalers make out of the QL signal.

Tobias


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Re: RGB to SCART Video * solved *

Postby stephen_usher » Sun Apr 07, 2019 10:28 am

tofro wrote:I have tried OSSC.

The picture I get with a cheap Chinese scaler on a cheap Chinese PC is way better than from OSSC together with an expensive NEC Multisync - So your mileage may vary.

It is, however, a bit of a lucky game with the Chinese scalers whether you get them to work properly with your specific QL and your specific TV. I have found that cheap TVs are much more tolerant to weird HDMI monitor signals the scalers make out of the QL signal.

Tobias


Erm, why would you ever use and OSSC with a MultiSync monitor?! It's designed to use HDMI to a TV. (That image was on a Curry's own brand FullHD LCD TV.) Of course, it depends upon your OSSC settings, the defaults don't digitise at double the pixel clock so you still get aliasing of the pixels and fuzziness and allowing passthrough output hands the upscaling to the TV/Monitor, which is usually hopeless.

I've got some of those convertors. They work but they are laggy as hell, so don't try to play games on them, and it's up to the TV to upscale, so if the TV does a good job you're OK. Also they merely detect the dot clock, digitise, fudge the de-interlace and send that information over the HDMI link and you hope the TV can handle it. They're not intelligent.


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Peter
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Re: RGB to SCART Video * solved *

Postby Peter » Sun Apr 07, 2019 1:38 pm

tofro wrote:The picture I get with a cheap Chinese scaler on a cheap Chinese PC is way better than from OSSC together with an expensive NEC Multisync - So your mileage may vary.

Do you mean Chinese TV?

I'm about to try a cheap 15" Chinese Monitor (VGA / AV / HDMI) with 1024x768 soon - that would be ideal for the QL, because pixels could scale directly and it has the traditional 4:3 format.

If it does not work, it should still be fine for Q68 - no scaling at all.


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Re: RGB to SCART Video * solved *

Postby tofro » Sun Apr 07, 2019 4:05 pm

Peter wrote:
tofro wrote:The picture I get with a cheap Chinese scaler on a cheap Chinese PC is way better than from OSSC together with an expensive NEC Multisync - So your mileage may vary.

Do you mean Chinese TV?

Erm, yes :oops:


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Re: RGB to SCART Video * solved *

Postby Dave » Sun Apr 07, 2019 9:07 pm

stephen_usher wrote:If you try and OSSC, which does cost a lot more but is worth it, it's better than you'd get with a TTL RGB display.


That would be a magical transformation indeed. Even higher fidelity than the original.



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