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Old 01 May 2011, 08:55   #1
Hewitson
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S-Video to Component Converter

I'm sick of how badly the C64 works on my LCD, so I'm wanting to transfer it over to the Trinitron.

Unfortunately this TV only has Composite & Component inputs, has anyone got any experience with S-Video to Component converters by any chance? I'm aware I can merge the S-Video to composite with a single cap, but I don't want to degrade the video quality.
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Old 03 May 2011, 05:15   #2
amiman99
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AFAIK, C64 has composite out on pin # 4, you can use that.
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Old 03 May 2011, 05:33   #3
ChrisUnionNJ
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Quote:
Originally Posted by Hewitson View Post
I'm sick of how badly the C64 works on my LCD, so I'm wanting to transfer it over to the Trinitron.

Unfortunately this TV only has Composite & Component inputs, has anyone got any experience with S-Video to Component converters by any chance? I'm aware I can merge the S-Video to composite with a single cap, but I don't want to degrade the video quality.
How old is your 64 breadbin or sleeker looking one?
I think the newer one's can use the 8 pin din with chroma and luminance and sound I know the 128's can I have a device that let's me use Composite in or S-video to VGA..

Chris
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Old 03 May 2011, 06:32   #4
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C64 have separate luma on the DIN connector, but not separated chroma. It have a composite instead.

Check the pinouts: http://www.allpinouts.org/index.php/Commodore_C64_Video
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Old 03 May 2011, 07:42   #5
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All C64's apart from very early ones output both luma & chroma as well as composite.

However as I said in my first post I don't want to lose the video quality I currently have with S-Video, which is why I want to convert it to component.
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Old 03 May 2011, 08:56   #6
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Subtract luminance from composite for chrominance, to convert S-Video to component you need proper color decoder (PAL/NTSC/SECAM) - not sure how it can fulfill requirement "I don't want to lose the video quality" - converting with not losing quality is possible (also partially) only with component to component ie RGB to YPbPr or opposite but not from PAL/NTSC/SECAM <> component.
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Old 04 May 2011, 04:18   #7
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In short: use the S-video pins.

You can't get a better output converting it. At best you can have the same pre-converted image, but since ALL conversion have a loss...
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Old 04 May 2011, 13:51   #8
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Quote:
Originally Posted by rkauer View Post
You can't get a better output converting it. At best you can have the same pre-converted image, but since ALL conversion have a loss...
I realise that, I'm not an idiot

Since the cheapest solution I found to convert the S-Video to component was $129, I've just stuck with the composite which to my surprise looks absolutely fantastic on the CRT, actually better than S-Video on the LCD!

I also performed the digi-fix on one of my 8580 machines, it now plays digitised samples just as well as the 6581. I'm very impressed
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Old 04 May 2011, 22:54   #9
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Doc of Desire built S-Video cables with a 300 Ohm resistor. From what i've read in Forum 64 they look pretty good on a LCD monitor/TV.

http://www.protovision-online.de/cat...9tuhr8ot12l8b1

Quote:
..I've just stuck with the composite which to my surprise looks absolutely fantastic on the CRT
True, but in some scrolling games you see a terrible flickering. Giana Sisters e.g.

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Old 07 May 2011, 06:46   #10
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Also composhite will be absolutely blurry when on Workbench, full of colour bleeding and all other dismaying "unwanted features" the single wire can bring.

S-VHS in the other hand will be almost as good as RGB and the conversion is very easy using a few components.

BTW: I never called you idiot, as I know you are not. One great & intelligent Amiga user, not less than that.
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Old 07 May 2011, 18:05   #11
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Issue with S-Video and with Composite is that they have very reduced bandwidth for Chroma signals- at best around 1.5MHz, also YPbPr component have half chroma resolution (common sampling scheme 4:2:2) - only RGB is full bandwidth component solution.
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Old 09 May 2011, 17:55   #12
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C128/C64C Video
Available on the Commodore C128, C128D, SX-64 and the C64C (white color).
Compatible with cables for the 5 pin D-SUB on C64's.
Pinout


8 PIN DIN "262-degree" FEMALE at the Computer.
(Not to be confused with DIN45326 - "270 degree")

1 - Luminance (monochrome video)
2 - Ground
3 - Audio out
4 - Composite Video out
5 - Audio in (into the SID chip)
6 - Chroma
7 - Not connected
8 - Not connected

Note: Direction is Computer relative Monitor.
Pin 8: Might be +5V on C128 and C64C.

Output signals
Signal - Level - Impedance - DC Offset
Luminance/Sync - 1 V p-p - 75 Ω - 0.5 V
Chroma -1 V p-p - 75 Ω - 0.5 V
Composite - 1 V p-p - 75 Ω - 0.5 V
Audio - 1 V p-p - 1 kΩ

Last edited by paulo_becas; 09 May 2011 at 18:01.
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