Kodachrome ArKives

On Tue, 19 Jun 2007 23:34:02 -0500, "Ken Hart" wrote:


"Richard Knoppow" wrote in message
link.net...

snip

If you are looking at NTSC color (standard definition, non digital TV
in the USA) there is actually a proper setting for the saturation. The
problem is that you need a color bar signal and a way to turning off all
but the blue gun of the picture tube. In addition, many sets have a color
matrix which tends to make the reds too hot. This is a left over from a
time when the original phosphors were changed. The newer phosphors did not
reproduce red as well as the earlier ones (but lasted longer and were
brighter) so a correction circiut was introduced. These are _never_ used
in the television broadcasting plant (I do TV for a living), so its common
for the color to either burn through on red or be undersaturated for
everything else. Digital TV doesn't have this particular problem but has a
whole set of vices all its own, some of which are worse.

Isn't it true that "NTSC" actually stands for "Never Twice the Same Color"?!

(Sorry, my broadcast background is in radio, where the picture is always
correct!)

*And* the image is always user-adjustable!

"Richard Knoppow" wrote
many sets have a color matrix which tends to make the reds too hot. This
is a left over from a time when the original phosphors were changed.

Thanks, always wondered why that was. I just got used to pastel
colors, the only way to keep the red from blooming. Is it possible
to easily defeat this 'feature'?

"Ken Hart" wrote

Isn't it true that "NTSC" actually stands for "Never Twice the Same
Color"?!

It certainly does.

Another great invention of RCA, the folks who invented:

o The 8-track tape,
o 45 rpm records - RCA recorded symphonies on them but
the music cut out abruptly for 10 seconds every three
minutes while the record changed.
o The capacitive video disk: a video disk that had a tone arm, a
needle and a grooved record, guess how well it worked
o NTSC
o ... other flops too numerous to mention ...
o and don't ask about FM radio http://en.wikipedia.org/wiki/Edwin_Armstrong

--
Nicholas O. Lindan, Cleveland, Ohio
Darkroom Automation: F-Stop Timers, Enlarging Meters
http://www.darkroomautomation.com/index.htm
n o lindan at ix dot netcom dot com