Reply To: Capture Sizing and Aspect Ratio

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#23488
SavagePencil
Participant

OK, that’s useful. And just so I’m clear, the 390 (and 780) are constants, and those come from the default Rec.601 spec?

“So 858 samples for 704×480 -> 780 samples for square pixel 640×480 -> 390 samples for 320×240.”

^ you wrote that earlier in the thread, but just checking that 390 and 780 are constants across the board. Looks like 390 samples * 263 lines * 59.9x refresh rate = ~6.14mhz, which correlates with the 1:1 entry on your dot clock page.