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Television Guides.
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Television Guides
NTSC - National Television Standards Committee
The oldest existing
standard, developed in the USA. First used in 1954. Consists of 525
horizontal lines of display and 60 vertical lines. Sometimes
irreverently referred to as "Never Twice the Same Colour." Only one
type exists, known as NTSC M.
SECAM - Système Électronique pour Couleur avec Mémoire
Developed in
France. First used in 1967. A 625-line vertical, 50-line horizontal
display. Sometimes referred to by wags as "Something Essentially
Contrary to the American Method" or SEcond Colour Always Magenta!"
Different types use different video bandwidth and audio carrier
specs.
Types B and D usually used for VHF; types G, H, and K for
UHF; types I, N, M, K1 and L for both VHF/UHF. Different types are
generally not compatible.
PAL - Phase Alternating Line
Developed by German engineer Walter
Bruch and the German electronic corporation Telefunken. Walter Bruch
patented his invention 1963 and the first commercial application of
the PAL system was in August 1967.
Also a 625/50-line display and
variant of NTSC. Proponents call it "Perfection At Last." Due to
the cost of the enormous circuit complexity, critics often refer to
it as "Pay A Lot". Different types use different video bandwidth
and audio carrier specs. Common types are B, G and H; less common
types include D, I, K, N and M. The different types are generally
not compatible.
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