I have a Pioneer Elite series upconverting DVD player and within the menus i can set what resolution i want it to output to my TV. I currently have it at 1080i, but the options available to me are 480p 720p and 1080i. I believe most upconverting DVD players have this available to you in the menus, i know the Pioneer and Denon players do, depending on your player YMMV.