On Wed, 19 Feb 2003 22:29:18 GMT, Andrew Rossmann <andyross@no_junk.att.net> wrote:

>In article <3e52ca1b.38366538@newsstand.cit.cornell.edu>, d_ruether@hotmail.com

>says...

>> On Tue, 18 Feb 2003 20:29:42 GMT, "tj"

>> <tj_spamtrap@mindspring.com> wrote:

>> >I've read that NTSC is 720x480. I've also read that it has a native aspect

>> >ratio of 4:3 (1.333), but 720/480 is 1.5.

>> >

>> >I'm lost.

>> >

>> >tj

>> We're all lost...! ;-)

>> NTSC is generally 4:3, with 480 (486) vertical lines

[...]

> Actually, isn't it 525? Only about 480 contain picture information. The

>rest contain sync signals, along with some unused lines that can contain

>one or more: closed captioning, color calibration, data transmission.

Yes - as I said, "We're [almost] all lost...! ;-)".