Joseph DeMartino
Senior HTF Member
It isn't that simple. EDTV really effectively means 480p in the U.S. and is mostly a standard that allows for low-cost flatpanel and directview sets that can replace existing SD sets, downconvert digital TV signals to a progressive scan image that will look sharper than SC and which won't require a set-top box once analog broadcasting stops in 2009.
For more information on the standard, see this article on Wikipedia.
Regards,
Joe