PAL SD: 787 x 576 & NTSC 655 x 480 pixels ???
Sorry, I’m not sure where you’ve got that from Theo, but to my knowledge it is as Marcello said, PAL 720 x 576 & NTSC 720 x 480.
“Actually pixels have a rectangle (and not square) aspect ratio (they are wider than taller) so in the end the virtual resolution (the actual space the picture uses on your graphic card) is 768 pixel wide ”
Just to clarify on that for you, (PAL) is 720×576 wether it is Anamorphic 16×9 or 4×3 – the anamorphic value ‘stretches’ it horozontially. So, if you are exporting DV-PAL always export 720×576, and NTSC 720×480.