what is the difference between rgb and component??


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hi, i just got a new tv that has component video input and was wondering if rgb was the same thing :(
 
Composite isn't digital at all....

RGB is a component form of video, but it is not "component video". Let's recap: The composite standards (such as NTSC and PAL) encode the luminance (brightness) and chrominance (color difference) components into a single signal for transmission. Component technology, on the other hand, keeps the component signals separate.

They're both analogue. In fact - composite existed on the first video recorders from the 70s.

Quote above from http://members.lycos.nl/originalnutter/xbo...onent_video.htm

Cheers
 
Ohoh, don't mischange component and composite...

Here is the solution (I work as a technical director at a TV station ;):

1. RGB
The best and original color system.
You have three lines: Red, Green and Blue.
(some RGB, such as RGB cables on computers, also need horizontal and vertical sync lines, but the picture itself uses three lines).

2. Component
Developed by Sony.
Component also uses three lines, but the three lines consist of:
Y
R-Y (or Cr)
B-Y (or Cb)

Y usually is the green line from RGB, R-Y and B-Y are pure mathematical calculations. Y is the luminance (so, if you only connect Y, you get a nice B/W signal).
A component signal can also be YUV, U is a reduced Cb-signal and V is a reduced Cr signal.

Component has been developed when RGB only had 5 lines to get the same image quality with only 3 lines.

3. Y/C (some VHS-recorders also call it SVHS)
All the colors are put together on one line and the luminance gets one line.
So we have a total of 2 lines, but we get some loss in the colors (you won't see them, though, they're minimal).

4. Composite (also called CVBS)
That's the worst quality. The colors and the luminance are together on one line.
The bandwith per line is 5 MHz, the color is encoded (AM) at 4,43 MHz.
For those who want to know a little more:
The more the contrast changes, the higher is the frequency.
(e.g. if you have a striped shirt, you have a high frequency).
When you have a contrast change at exact 4,43 MHz, the TV doesn't know whether this is luminance or a color. That's why you have nice flirring colors at shirts with striped shirts ;))
And because we only have small bandwith for the colors, they are really blurry at edges.

Oh, and none of the four signals here are digital, all pure analog :)

Okay... I hope this is all you ever wanted to know (if you want to know more, just ask :))
 
where can i find this adapter???? and if there is rgb with no hsync or vsync is that component??? :( sorry if this sounds stoooooopid but i am kinda new to this :(
 
Nope, RGB without HSync and VSync is not component.

Component still consists of Y (Luminance) and Cr Cb (Reduced Red and Blue) and RGB, well, the name says it: Red Green Blue

Are you sure your TV can't handle RGB AND Component?
On most TVs you can switch that in the setup menu.

Oh, and if you plan using a PS2: You can switch RGB / Component output on the PS2, too (same cable :))
 
well, i have lots of systems that i want to use it with by means of modding ;) but where can i find a rgb to component adapter???as cheap as possible...
 
I guess your favourite TV store around the corner should have it.
As has already been stated, it costs about 2-3 $, you won't get it much cheaper...
 
ooooooooooh thats just wonderful... i live in the us and in nebraska... <_< good luck finding one here :( f)(* :angry: thanks for all of you help, i know much more than i ever wanted to know about video now, thank you :D actually that was quite helpful...
 
As said: Try before you get mad at finding a converter.
Most TVs support both component and RGB signals (either switchable or automatically)
 
EvilDragon,

Maybe you can answer a related question,

Why do video signals of NTSC games on a PAL console (PS2) but also NTSC DVD's on a PAL DVD player show up in black&white unless you use a SCART cable. This questions has been bugging me for ages and I never found the answer (or didn't know where to look)

Thanks in advance
 
Yep, that question is actually pretty easy to answer:

Most people only know the difference between PAL and NTSC as PAL usually being 50 Hz and NTSC being 60 Hz.

But there's another difference:
As already stated, if you have a composite signal, the color signal is encoded into the luminance (B/W) signal.
This encoded signal is called the "color burst".
The first guys to develop the television developed this technique using NTSC - but there has been the problem that the colors shifted (on old TVs you had a knob to recalibrate the colors, new TV sets do this automatically for you)

The developers in Germany thought of a solution to this problem a came up with a different burst (a mirrored one, to be exactly) so that the TV sets could automatically handle the colors and there's no shifting (so PAL is more advanced than NTSC).

The problem now is: The PAL TVs can't decode the NTSC color burst and the NTSC TVs can't decode the PAL color burst - so only the luminance (B/W) signal can be displayed.

When you use a scart cable, you usually connect your DVD Player, PS2 or whatever else using RGB (three lines instead of one).
There's no need to decode any colors because they are transmitted seperately.
And that's why you have colors on all kinds of TVs (well, they must at least have a RGB scart)

Is everything clear now?
 
Perfectly clear! You don't know how long I have been looking for this answer, thanks again :D
 
I can understand your problem pretty well... I was always wondering the same thing before I slipped into that job ;)
Glad to be of help :)
 
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