Originally Posted by MrMarbach
Why is the improvement more? What technical differences are there between NTSC and PAL? All I am aware of is that PAL DVDs are often at the wrong speed, giving NTSC an advantage (as always detailed by DVDBeaver).
PAL is 50Hz, 576 displayed lines, 625 transmitted lines.

NTSC is 59.94Hz, 480 displayed lines, 525 transmitted lines.

For TV & DVD, PAL takes a film at 24Hz and speeds it up to 25Hz. 25 frames/sec are then interlaced to 50 fields/sec.

NTSC takes a film at 24Hz and applies telecine pull-up. Alternating fields are displayed/repeated in a 2-3 sequence that causes judder. Americans usually get used to judder and don't notice it, but Europeans hate it.

PAL also has better colour encoding than NTSC; so not many advantages with NTSC, really.
However, NTSC video is more easily de-interlaced, as the telecine cadence is more easily detected and decoded.

Nick