RF vs Scart vs Composite vs Svideo vs GBS - PICS INSIDE!
- Thread starter AmmoJammo
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cardboardboxer
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you can't really expect composite to be all that much better though, to be honest, if you have an A600 or A1200, ditch the gbs, and the scart cable, and use s-video!
cardboardboxer
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thing is though, on my Mega Drive 1, there's a massive difference between composite and svideo
@AmmoJammo
Why thumbs down on the GBS?
That's clearly the most accurate image of what the checkerboard should look like after taking into account the difference between physical and logical resolution. It's near pixel perfect and very acute.
Don't perform such tests/comparisons on LCD screens, they're junk.
Use a proper CRT TV and a proper CRT VGA monitor (for the GBS), especially a nice one with Moire correction. It's a night and day difference.
Why thumbs down on the GBS?
That's clearly the most accurate image of what the checkerboard should look like after taking into account the difference between physical and logical resolution. It's near pixel perfect and very acute.
Don't perform such tests/comparisons on LCD screens, they're junk.
Use a proper CRT TV and a proper CRT VGA monitor (for the GBS), especially a nice one with Moire correction. It's a night and day difference.
:double lolz
its wierd that isent it steve? i havent seen that before,well unless the cable was faulty.
@Thread
In regards to the SCART purple output hue, there is a problem with the Green Signal - this may be a Video output or Cable fault.
I do so appreciate good comparisons and this thread has started well, but I will state that the effort with the GBS comes across as an afterthought.
@AmmoJamo
You should inform the user the version of GBS you are using as well as the input method - for the Amiga there are 4 possible input methods which includes
RGB-S / RGB-HV / Composite and Component Y - Cb Cr
Each of these variables will have an effect for the de-interlacing and picture re-integration process. I would also state that it is widely know that the GBS under performs on LCD / OLED technology that forces 60Hz - This is mainly because its it designed for the Arcade Market that uses CRT technology - IMHO if one is to show the GBS under LCD / OLED then they should show this under a CRT solution for comparison.
Sadly when it comes to Video there is very simple way to look at it, and thats compression -
RF - Two wires contain the RGB, SYNC video components as well as Sound
Composite - Two wires contain the RGB and SYNC components
SVideo Y/C - Three wires containing the RGB and SYNC (as Choma, Luma, ground)
SCART RGBs - Five wires contain the RGB and composite SYNC information
SCART RGBhv - Six Wires Contain the RGB and separate SYNC Information
YUV is a different colour space, but is essentially a non compressed component signal
You have made a great start on the thread - keep up the good work.
In regards to the SCART purple output hue, there is a problem with the Green Signal - this may be a Video output or Cable fault.
I do so appreciate good comparisons and this thread has started well, but I will state that the effort with the GBS comes across as an afterthought.
@AmmoJamo
You should inform the user the version of GBS you are using as well as the input method - for the Amiga there are 4 possible input methods which includes
RGB-S / RGB-HV / Composite and Component Y - Cb Cr
Each of these variables will have an effect for the de-interlacing and picture re-integration process. I would also state that it is widely know that the GBS under performs on LCD / OLED technology that forces 60Hz - This is mainly because its it designed for the Arcade Market that uses CRT technology - IMHO if one is to show the GBS under LCD / OLED then they should show this under a CRT solution for comparison.
Sadly when it comes to Video there is very simple way to look at it, and thats compression -
RF - Two wires contain the RGB, SYNC video components as well as Sound
Composite - Two wires contain the RGB and SYNC components
SVideo Y/C - Three wires containing the RGB and SYNC (as Choma, Luma, ground)
SCART RGBs - Five wires contain the RGB and composite SYNC information
SCART RGBhv - Six Wires Contain the RGB and separate SYNC Information
YUV is a different colour space, but is essentially a non compressed component signal
You have made a great start on the thread - keep up the good work.
hooverphonique
Member
by SCART you mean RGB? SCART supports composite, RGB and s-video, so just calling it "SCART" could be misleading ;-)
I don't think its the cable, could even be the TV, it would be alright for a few minutes, then turn pink
I find this post a bit odd?
the GBS is the gbs8220, although the gbs8200 is essentially the same.
As for the video input, the gbs doesn't work with separate horizontal and vertical sync signals, I believe one of the signals is out of phase, they don't have a composite input, and you can't use ypbpr/yuv, as it results in no green...
that only leaves one option for connecting the amiga to the gbs...
---------- Post added at 07:10 ---------- Previous post was at 07:09 ----------
as the tv has a scart, AND rgb (vga) input, I decided to call it "scart" rather than rgb.
yes, it is rgb via scart.
@AmmoJammo
The GBS can accept a YPbPr input with a specific cable from the A1200 -
My fellow EAB'er Anemos worked on this -
you can read more here
(Picture Copyright Anemos: posted on eab.abime.net)
RGBHV is available from the 15pin HD connector,
RGBS is also available from the 8pin White connector
I am sorry about the inclusion of composite, my mistake I thought they had a composite video input. Quite ironic really as I have on the table in front of me :nuts:
There are several motherboard revisions of the GBS8200 and 8220 - rev 5's are more sought after as they have better firmware for de-interlacing and scan doubling.
I should ask did you have a play with the RGB Adjust pots?
The GBS can accept a YPbPr input with a specific cable from the A1200 -
My fellow EAB'er Anemos worked on this -
you can read more here
(Picture Copyright Anemos: posted on eab.abime.net)
RGBHV is available from the 15pin HD connector,
RGBS is also available from the 8pin White connector
I am sorry about the inclusion of composite, my mistake I thought they had a composite video input. Quite ironic really as I have on the table in front of me :nuts:
There are several motherboard revisions of the GBS8200 and 8220 - rev 5's are more sought after as they have better firmware for de-interlacing and scan doubling.
I should ask did you have a play with the RGB Adjust pots?
smilertoo
New member
Looks like super video is the one to go for.
I have a cable that don't latch perfectly into the VGA input of one of my monitors. The image get a pink or yellowed look at times and I have to move the conector a bit and the image look good again.
The vertical bands in some images are due the cheap converter in LCD TVs when the Amiga is in PAL resolutions.
They show perfectly in NTSC ones.
I'm confused, I've NEVER got a picture as clear as that with S-Video on any system.
My understanding is that RGB SCART is superior to S-Video, not the other way around! This is based on my findings.
My understanding is that RGB SCART is superior to S-Video, not the other way around! This is based on my findings.