MaximRecoil said:

Not exactly. LaserDisc = 425 lines of composite video (1 channel), while DVD = 480 lines of component video (3-channel, YPbPr).

Minor nitpick: You're confusing horizontal and vertical resolution. ALL NTSC LDs are 480i; that is, they have 480 visible* rows/scanlines and that's all you can say because LD video is analog and each scanline isn't composed of discretely quantized units such as pixels. For proof of this I suggest you research the design of CAV LDs, among other things.

The 425 value is an approximate of the number of columns per scanline as provided by Pioneer (and other LD manufacturers) in their LD literature. It's a TVL value, not a pixel count, so you'd have to multiply by 4/3 in order to get an approximate pixel count.

Want a real mindfuck? All NTSC VHS tapes are 480i as well. The columns per scanline on the other hand... well... they're a bit shy of the ~425TVL available on LD. :-P

(* The true visible value is somewhere between 483 and 486 depending on how you interpret the various standards related to the NTSC system. The only constant value here is 525 which includes both visible and "invisible" scanlines. This is why NTSC is called a 525-line system.)