" wrote:
On Jan 10, 10:18 pm, Jeff Liebermann wrote:
On Mon, 10 Jan 2011 17:52:24 +1100, "Phil Allison"
wrote:
NTSC color started in the USA in the early 1950s.
Monochrome compatible NTSC color was proposed in 1950 and approved in
1953. That was the 2nd attempt as the first NTSC comittee conjured an
incompatible system in 1941 that was generally rejected as most of the
manufacturers decided to delay introduction of consumer TV sets until
after the war was over. There was a also an attempt at standarization
in the 1930's. Light reading:
http://www.ntsc-tv.com
The famous irreverent NTSC acronym way predates 1980.
You might want to read what I scribbled. VIR hue correction started
in about 1980.
You stupid, ****ing ****head.
"Obscenity is the currency of a bankrupt vocabulary"
--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
I have enjoyed the Sommerwork, Lieberman, Mendelsohhn, Terrell
discussions. I started working on color tv's in 1955 when I was in
college. Vacuum tubes galore and two console cabinets just to put a
color picture on a 10" tube. But it was color and the amount of power
was not a major consideration. I bought my first color tv in 1958, a
1957 set on sale with a 21" round picture tube set that drew about 375
watts. The vertical scan was 59.9 hz, as I recall and when the power
supply caps started failing you got a slow-moving hum bar moving up
the screen. The color variations were due to various network sources
having slightly different phases for the color subcarrier and sets
that had very pure theoretical demodulators. Then sometime in the
early 1960's someone had the idea of having any signals close in phase
to the phase of "ideal" skin tones of WASPs move closer to the "ideal"
skin tone, making it less necessary to constantly adjust the "hue"
control. It distorted colors, of course, but people looked more
"Normal" and it was agood selling point for a number of years.
Also, they developed better chroma demodulator circuits in the '60s.
Each one could be identified by the overal image. Sylvania was the
easiest. It had a faint blue tinge.
--
You can't fix stupid. You can't even put a band-aid on it, because it's
Teflon coated.