15 May
2007
15 May
'07
6:54 p.m.
Tony Duell wrote:
THe US TV standard specifies 525 lines, but rememebr
that (a) that
includes the 'lines' during the vertical blanking period and (b) it's
interlaced. There are probably under 500 lines actually displayed in the
image, and if you're using a computer which sends the same data after
each vertical sync pulse -- thit it is ignores interlacing -- so that
pairs of lines on the screen show identical data, then you're going to
have something around 200 lines vertically.
That sounds about right. I think I could get about 270 lines on a UK
(625-line) set by hooking a PC's (S)VGA output up to it and futzing around
with display timings - so 200 lines on a 525-line set seems about right.