"Michael J. Hennebry" <hennebry@web.cs.ndsu.nodak.edu>

wrote in message news:99a0b764.0403031409.20c0e0a2@posting.google.com...

> Are the pixels square?

> If so, 720:480 = 3:2.

> What uses 3:2?

The vertical number is determined by the number of NTSC TV

scan lines, and is fixed; the horizontal number determines the

horizontal resolution (using rectangular pixels to maintain the

4:3 picture proportion), and "everything comes out right"

when the image is converted to an analogue signal for the TV.

--

David Ruether

d_ruether@hotmail.com

http://www.David-Ruether-Photography.com