🚀 go-pugleaf

In article <ant20173...@barc.demon.co.uk>, Mike Wilson
<URL:mailto:mi...@barc.demon.co.uk> wrote:
> 
> In article <5edu0v$7ek$1...@news.wizvax.net>, Richard Shetron
> <URL:mailto:mul...@wizvax.wizvax.net> wrote:
>   
> [snipped most of Mike's excellent roundup of videotape formats]

> Around 18 years ago Sony introduced "Betacam" which was a component,
> as distinct from composite format.....

It can't have been 18 years. I've operated VT machines for 15 years and
I can remember its introduction.

> ...... Component means that the Red, Green and Blue, signals coming
> from the video cameras were encoded into a luminance section (which
> had the black and white picture information) and a chrominance section
> with the colour information which was time compressed by 50% and
> incorporated the colour components in two sum and difference sections
> (Normally known as Y U V, ie the complementary colours to R G & B).

Yellow, cyan and magenta are the complementry colours to red, green and
blue.

Y is a luminance or 'grey' signal comprising 59% green, 30% red and 11%
blue. U is a signal derived by subtracting the Y signal from the red. V
is Y subtracted from blue. U and V are known as 'colour difference'
signals.

> [snip]

I know its dull but at least its nearer the truth. ;-)


-- 
-----------David Woods, Bearsden, Glasgow.-----------
-----------email david@wdwoods.demon.co.uk-----------
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