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Post by mirkosoft on Aug 20, 2014 5:41:45 GMT
Hi!
I own new PCIe HDMI/DVI/VGA and component capture card.
In VGA input I have connected Commodore 128 RGBI by CGA2VGA converter (80 column mode VDC)
I want to connect to component (YPbPr) the composite CVBS Commodore 128 VIC.
How to connect composite output into component input?
Component has RCA connectors for Red, Green, Blue + L and R audio.
Audio is not problem, problem is that composite output has 1 CVBS RCA connector...
How to connect it? Or needs it converter?
All ideas are welcome.
Miro
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Post by hydrophilic on Aug 20, 2014 7:49:40 GMT
I think it would need a converter. YPbPr is like the enhanced mode of S-Video (naturally produced by C128)... that is, S-Video has two signals: luma and chroma; but YPbPr has 3 signals: luma, partial "blue", and partial "red" (but "blue" and especially "red" are just sloppy names for the real color content...) In other words, YPbPr is enhanced because the chorma (hue + "saturation") is now two seperate lines (Pb and Pr) while the C64/C128 (others?) only output a single "chroma" line. Ummm, I imagine it might be possible with a simple resistor network when converting YUV (PAL video) because the color axes are orthigonal and the same scale... but converting YIQ (NTSC video) seems more difficult due to non-orthogonal axes and different scales. Maybe a device like this? I don't know if it is NTSC or PAL. It makes a HUGE difference, so please check before purchase! |
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Post by mirkosoft on Aug 20, 2014 18:44:21 GMT
Hm, of course it's not problem to use CVBS2SVHS cable, but really I need PAL version.
I didn't knew that PAL and NTSC are so different...
I try to find it here in Slovakia, we have standard PAL, so I mean that NTSC devices & cables are only for ask...
Tomorrow I ask our dealer for SVHS 2 RGB reduction - it looks like reduction, no as converter 'cause I found few, sadly not in Slovak markets and if here, too precious.
Thank you Robert.
Miro
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Post by hydrophilic on Aug 21, 2014 6:05:29 GMT
Once it is in YPbPr format it should be compatible with any monitor that accepts (50Hz) component video. But yeah, the S-Video (SVHS) which is output by C128 (C64 etc.) is definately NTSC/PAL specific. Also, I misunderstood... I see now you want to use single RCA connector from C128 (composite video, or CVBS). I don't think composite (CVBS) gives best quality. If possible, you should try to get two RCA connectors from C128 (luma and chroma)... this is classic CBM monitor cable. Newer cables have a single S-Video (SVHS) plug, but that connector has the same luma and chroma signals as the classic 2 RCA plugs. This gives better quality, and what I was thinking when I posted the link above. If you really must use single RCA cable from C128 (composite / CVBS) then it might difficult. There are many YPbPr to Composite coverters to choose from, but it is almost impossible to find the other direction: Composite to YPbPr... after searching for several minutes, I could only find one and it is rather expensive. So what you are now saying, using CVBS-to-SVHS as a first stage might be cheaper, because once you have SVHS (S-Video) there are numerous adapters available to choose (like my original link). But really, you should be able to buy simple cable for C128 that will directly give you S-Video... like this one eBay or this one on Amazon. |
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