Reply To: Audio but no Picture.

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#24792
BlueStinger
Participant

@nmalinoski
“RGsB is sync-on-green, where composite sync is mixed to Green” you seem to imply that Green is the cable that caries the color green, which would mean that luma is only on the green VIDEO COLOR line. Or that sync-on-green and sync-on-luma would be two separate things.

Correct me if I’m wrong but sync-on-green means sync-on-luma and both mean RGsB, YPbPr is sync-on-green and the green cable only carries Luma. Same goes for Scart. A scart sync-on-luma (= sync-on-green = RGsB) is a scart where :
1 pin carries Red
1 pin carries Green
1 pin carries Blue
1 pin carries the sync signal on a separate line that is Luma (which would be used for luma if the scart were to be wired for S-video)
and the composite line would be unused

CSYNC (sync-on-composite) on a scart would be :
1 pin carries Red
1 pin carries Green
1 pin carries Blue
1 pin carries the sync signal on a separate line that is Composite (which would be used for a composite signal if the scart were to be used as a non-RGB scart)

Did I got that wrong ?!

Y from YPbPr = green cable = only luma (no color) = sync, but that’s a “happy accident”.
What we call it “green” in that case is supposed to refer to the color coding of the wires but not the video signal, or did I get this wrong ?

Because if I’m wrong (and I could be), this means that RGsB (sync-on-green) is not equal to sync-on-luma. In that case, are we supposed to use the term “sync-on-green” only when referring to YPbPr ? And sync-on-luma only when referring to scart or s-video ? Does that mean that the green color (video not color of the cable) carries the luma ?!

Sync


In this page, Bob list the types of sync signals twice. Once sync-on-luma is part of the list, and missing from the other list. And in the second list he talks about sync-on-green and sync-on-luma is missing. So, he forgot a sync signal in both lists ? Or can I use them interchangeably ?