I understand the basic principles that a suitable player will take the resolution from standard DVD and turn it into a 720/1080i/1080p resolution. But where do those extra pixels come from that increase that resolution? I mean, if they were already on the DVD then there wouldn't be any need for a HD resolution, right? So does the player (or set, depending on what is doing the upscaling) just 'copy' the nearest pixel from the source or ... what? How does it work?!