AVS Club Gold
Join Date: Jun 2006
Location: Good Ol' US of A
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A discussion in another forum got me wondering about the difference between the windowed greyscale and gamut patterns on SD and HD calibration discs. My basic understanding is that gamut information isn't recorded on a disc or present anywhere in the video signal, which is partly why we have to calibrate our display's gamuts in the first place.
If my understanding is correct (which I readily admit it could be incorrect) could one hypothetically use the RGBCYM window patterns from an SD test disc, set their calibration software to the REC 709 targets, and then calibrate an HD display? I.e., if you have a fully saturated green pattern on a test disc, and you tell your calibration software that you want that fully saturated green window to match the REC 709 green target, you could properly set green despite only using an "SD" test disc.
Am I missing something or would this actually work? I'm not personally going to try this, but the person in the other forum only gets their HD material from cable, only owns a DVD player, but wants to set his display to REC 709. Several of us suggested other ways of doing this - including running the free HD test disc mp4 from his laptop and connecting that to his display - but it got some of us wondering about this a little more in depth.
There are 10 types of people: those who understand binary, and those who don't.