On a dvd/vcr combo, JVC claims upconversion to near HD quality for the dvd as well as the vcr. Both send output to the HDTV via a single HDMI cable. Sony also seems to claim upconversion for both. Another, Toshiba, claims near HD upconversion for the dvd only. Can vcr output from a tape be upconverted to approximately 1080p? If not, can the tape be dubbed to a dvd and then the output from the dvd recorder upconverted?