The difference between PAL and NTSC (the American type in full: National Television Standards Committee) is that the NTSC syatem isn't as good in coloring as the PAL system but has a higher nuber of half-frame per second (PAL has 50, NTSC 60) wich makes tv images look more fluid.
These days tv's (especially in Europe) support both signals including a mix of both wich has the refresh from NTSC and coloring of PAL.
This system is also used as a country lock, meaning that sertain DVD's or tapes will only play if the system supports the signal.
John:no hes just a real P.A.L.
"WOW! Lucky you!"