Archived from groups: alt.video.ptv.tivo (
More info?)
JOSEPH PERRY wrote:
> The only thing better than S-Video is Component. The rating from best to
> worst for all video sources is cable, composite, s-video and component.
That's true if you make the assumption that *all else is equal*.
Different sources may use different comb filters, upconverts, etc. But
in general the better quality connection types will use at least as good
processes and parts as the lower quality connection types, so that
assumption is a pretty good one.
> Component is a 3 cable video source dividing red, green and blue.
Sorry, that is incorrect, I could write it out, but I have a nice
pre-written passage handy ;-)
"Component video consists of three signals. The first is the luminance
signal, which indicates brightness or black & white information that is
contained in the original RGB signal. It is referred to as the "Y"
component. The second and third signals are called "color difference"
signals which indicate how much blue and red there is relative to
luminance. The blue component is "B-Y" and the red component is "R-Y".
The color difference signals are mathematical derivatives of the RGB signal.
Green doesn't need to be transmitted as a separate signal since it can
be inferred from the "Y, B-Y, R-Y" combination. The display device knows
how bright the image is from the Y component, and since it knows how
much is blue and red, it figures the rest must be green so it fills it in."
Randy S.