There's high-def and there's true high-def
An upconverting DVD player (and, by extension, the DVD-upconversion capability of better Blu-ray players) is a great way to extend the life of a standard-definition DVD collection, significantly improving the image quality of the decade-old format. But no, an upconverted DVD image should not be confused with true high-definition.
The process of upconverting a DVD involves employing sophisticated video processing to expand the format’s native resolution (720x480; 345,600 pixels total) up to the resolution of the best modern HDTVs (1920x1080; 2,073,600 pixels). Better upconverting players smooth out the rough edges and fill in the gaps created by expanding the picture to this degree, resulting in an image that’s a marked improvement over unenhanced DVD.
But upconversion cannot create detail out of whole cloth. When film is transferred to standard-definition DVD, any details too fine to be captured in 345,600 pixels are lost forever. Even the most advanced video processors in the world can’t bring those lost details back from their digital afterlife. Blu-ray, on the other hand, boasts six times as many pixels as DVD, and as such comes much closer to the resolution of film and modern digital cinema sources. What’s more, many viewers feel that the superior colors and contrast afforded by Blu-ray’s more advanced video codecs are just as significant, if not more so, than the increase in real picture detail.
SAMSUNG BLU-RAY RESOURCE CENTER
http://pages.samsung.com/us/bluraysupport/