An MMDer pointed out the limits of DVDs -- they do not play at 1080p,
but rather they are 720 x 480 pixels.  I knew that, but just didn't
think about it.  I apologize for my error.

Bob Taylor

 [ The number listed in the common TV resolutions of 1080p, 720p, and
 [ 480i refer to the number of horizontal scan lines.  The number
 [ of vertical lines turns out to be a larger number at the ratio
 [ of 4:3 or 16:9 depending on the aspect ratio of the source material
 [ and/or display.  The suffix letter refers to whether the input to the
 [ display is interlaced or not.
 [
 [ Standard DVDs can support resolutions up to 720x480 pixels at 29.79
 [ frames/second interlaced.   This corresponds to "480i" resolution.
 [     http://en.wikipedia.org/wiki/DVD-Video 
 [ This preceptually much better than VHS tape and "upscales" to 720p
 [ displays so well that a lot of people won't notice or care that it
 [ isn't really 720p source material.          -- Jody