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OG Xbox Forums => Hardware Forums => Xbox Audio/Video Technical => Topic started by: Big HDD on November 02, 2003, 04:56:00 PM

Title: What Type Of Video Connection Do You Have?
Post by: Big HDD on November 02, 2003, 04:56:00 PM

any questions about these types can also be posted here too

Title: What Type Of Video Connection Do You Have?
Post by: Big HDD on November 06, 2003, 10:09:00 PM

all righ, component in the lead!

Title: What Type Of Video Connection Do You Have?
Post by: Big HDD on November 07, 2003, 07:26:00 PM

Um...isnt component aka RGB.....u know Red, Green, Blue???????

Title: What Type Of Video Connection Do You Have?
Post by: Mr Ed on November 07, 2003, 08:31:00 PM

QUOTE (OEM @ Nov 7 2003, 05:26 PM)

SCART is not a video signal, it's a 21 pin *connector*. "PAL TV" isn't a video signal/connection either, you're comparing apples and oranges. And you missed the most important/best way to connect an X-Box to a non VGA/HDTV compatible CRT display (meaning regular TV's); RGB.

Either RGB is component or there is no such thing as RGB.

Title: What Type Of Video Connection Do You Have?
Post by: Big HDD on November 07, 2003, 08:36:00 PM

thank you very much!

Title: What Type Of Video Connection Do You Have?
Post by: ChrisF on November 07, 2003, 08:48:00 PM

At this point it's obvious who the type of people are that come to this forum.  Component video is multiples ahead of the others - every HD owner on the board must come here to browse.

Title: What Type Of Video Connection Do You Have?
Post by: jm_007 on November 09, 2003, 02:54:00 PM

rgb. nothing less.

Title: What Type Of Video Connection Do You Have?
Post by: OEM on November 09, 2003, 05:02:00 PM

I wrote the explanation above on component video from memory, and it's not entirely correct. Here's an explanation taken from Projector Central:

"So how do you transport an image from the camera to your TV or projector? You could transmit it in the RGB format in which the camera first captured it. However, RGB is a bandwidth hog and bandwidth is expensive. So the first thing that happens is RGB is converted into a more compact format. This format is component video.
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."

Here's an explanation of why RGB is superior to component video taken from CRT Projectors Co UK:

"Q: Why is RGB superior to Component video?

A: Component video takes advantage of the fact that the human eye is very sensitive to changes in luminosity but not very sensitive to colour. Component video uses the full luminosity bandwidth but a reduced colour bandwidth so that the electronics can be of a lower specification than required for RGB. Basically its a cost reducing exercise for manufacturers, high video bandwidth requires high quality (read cost) electronics. The theory is that while Component video uses a reduced video bandwidth, the human eye can't detect the difference in the final image. Most of the time this is true, but remember the native format of any projector is RGB, if you use Component to the projector it still has to be transcoded to RGB to drive the tubes. This transcoding can introduce errors, so use RGB where possible to reduce such errors."

Title: What Type Of Video Connection Do You Have?
Post by: jmarshall on November 09, 2003, 06:16:00 PM

While what OEM has mentioned is correct (at least in the latest post) you must remember that as far as video files are concerned, these are generally stored in luminance/chrominance formats (YV12, YUV2 etc. etc.)

Thus, conversion to RGB has to be done somewhere anyway - either in the display (sending the data in component video), or in the source (converting to RGB, then sending the RGB).

This doesn't generally apply to video games, as most are rendered in RGB to begin with.

Conclusion:  For gaming, RGB is probably the optimal.  For DVD/DivX playback, it's a toss up - it really depends on which hardware has the better convertors - XBox or your display device.