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RGsB = Component?

post #1 of 16
Thread Starter 
Just a quick question for everyone.

Just curious, seeing how both Component and RGsB have 3 wires, and both sync on green, if one has said input, can one use component 480i/p in there?

Thanks!
Cheers,
Alex
post #2 of 16
No. Component is YPrPb (luma, chroma red, chroma blue). RGsB is RGB.

Since the luma channel is the green connector and it has sync on it, if you hook component up to your RGsB input, you will get a lovely green picture that is the exact values of a black and white version of the picture.

If you want to see what is on the Y channel, just hook up only the green component cable to a transcoder, then you will get a perfect black and white version of the signal.

For more on this:
http://en.wikipedia.org/wiki/YCbCr
http://en.wikipedia.org/wiki/RGB

Dave
post #3 of 16
Quote:
Originally Posted by ancorp View Post

Just a quick question for everyone.

Just curious, seeing how both Component and RGsB have 3 wires, and both sync on green, if one has said input, can one use component 480i/p in there?

Thanks!
Cheers,
Alex

Sorry, no. Won't work.

RGsB is entirely different than component. You will get a green picture only if you did plug the wires in. To convert from component to RGB you need a device referred to as a "transcoder" Here is a link to one developed by another AVS member http://www.hdconnection.com/Products.htm in this thread http://www.avsforum.com/avs-vb/archi...10247-p-1.html

There are other commercial versions, and some may cost less, or are able to handle fewer resolutions, or are of lessor quality, but all transcoders are the same in that they convert tri-level sync to bi-level sync and implement the matrix to convert the signals. Some do not do a good job of converting the colors or of stripping the sync, or handling black levels, so read through the thread above to see many comments describing the various units people tried.

It is unfortunate that component cables use the same three colors on the connector ends to identify which plug is which as the RGB cables. The signals the wires hold are nowhere near the same.

joe L.
post #4 of 16
If you are going to get a transcoder, I would recommend the following:
http://www.crescendo-systems.com/rev_transcoder.html

It has been tested my multiple people to be better than the one link to just above this post. It is widely acknowledged as the current king o' the hill.

Dave
post #5 of 16
Thread Starter 
Thats exactly what I expected to hear really, Im well aware I need a transcoder for Component to normal RGBs or RGBHV, but thought I had a glimpse of hope for RGsB

There is no way Im buying a $159 transcoder for a 480p projector thats probably worth less than that...

Thanks gents!

Cheers,
Alex
post #6 of 16
Hello

We can see on a scope here the graphic display of these outputs, first is the Y or Luminance output of the YPrPb out of my Dish 211 HD sat receiver, at 0.20 volts per vertical division; it strongly resembles a Sync-on-Green output from a computer workstation and most displays that can display sync-on-green would probably lock to the sync and show an all-green screen.





The Pr signal is chrominance for red and would not show up fed to the red port of an RGB display, the reference porch voltages are not available that the display would need, nor is it a red analog representation; the signal varies to both sides of ground:




This screen below is analog red above, and sync shown below, from my HTPC after going thru an Extron 202xi, the green and blue channels would scope very much alike as all are analog waveforms of similar nature. The H and V sync channels are composited to one combined sync channel. The vertical amplitude is less to show both signals at once.




All scope screens are timed for two H scan lines; 33khz for the Dish and 54khz for the HTPC.
post #7 of 16
Thread Starter 
Thanks Tim! The parts I understood were facinating

Seriously, thanks for the explanation, its exactly what I saw - a perfectly fine, all green image...

Thanks!
Cheers,
Alex
post #8 of 16
If you are using this for DVD playback - you can get a DVD player that outputs RGBHV like those $60 Citizens. I had one but gave it to my parents. I still see them time to time at cheapo electronic shops. Might be a cheaper solution than a transcoder or scaler.
post #9 of 16
Great photos Tim. Your skills continue to improve!
post #10 of 16
Next thing you know he'll be dropping a R and B tube into two more scopes and will start stacking and blending..
post #11 of 16
Quote:
Originally Posted by Curt Palme View Post

Next thing you know he'll be dropping a R and B tube into two more scopes and will start stacking and blending..

Hehehe

That scope is a Leader 60mhz dual trace and there is zero wear and tear on the tube face.........I think I've got some HD8s in the closet........
post #12 of 16
Quote:
Originally Posted by tim View Post

Hello

We can see on a scope here the graphic display of these outputs, first is the Y or Luminance output of the YPrPb out of my Dish 211 HD sat receiver, at 0.20 volts per vertical division; it strongly resembles a Sync-on-Green output from a computer workstation and most displays that can display sync-on-green would probably lock to the sync and show an all-green screen.





The Pr signal is chrominance for red and would not show up fed to the red port of an RGB display, the reference porch voltages are not available that the display would need, nor is it a red analog representation; the signal varies to both sides of ground:




This screen below is analog red above, and sync shown below, from my HTPC after going thru an Extron 202xi, the green and blue channels would scope very much alike as all are analog waveforms of similar nature. The H and V sync channels are composited to one combined sync channel. The vertical amplitude is less to show both signals at once.




All scope screens are timed for two H scan lines; 33khz for the Dish and 54khz for the HTPC.

This is better than porn.

Well, okay, not really, but it's pretty close!
post #13 of 16
Thread Starter 
Quote:
Originally Posted by EC View Post

If you are using this for DVD playback - you can get a DVD player that outputs RGBHV like those $60 Citizens. I had one but gave it to my parents. I still see them time to time at cheapo electronic shops. Might be a cheaper solution than a transcoder or scaler.

Hey Eric,
Yep Ive been considering that. Know any good places in the GTA for something half decent and not too pricey?

The projector takes Composite sync, not H/V, thus, I would need one of those T connectors to combine the sync?

That RGBHV cable combo you sold me is still working great, now at 1080p

Cheers!
Alex
post #14 of 16
Factory Direct on Jevlin Dr & Applewood Cres. shows 8 in stock

They are the ones that do Karaoke too Part Number:R18164
Model: DVD816-4 they have a VGA out on the back that puts out 480P

I ran one of these with a Sony 1252 and it looked good. Even has a volume control on the remote. Not expensive either.
post #15 of 16
Thread Starter 
Quote:
Originally Posted by AnalogRocks View Post

Factory Direct on Jevlin Dr & Applewood Cres. shows 8 in stock

They are the ones that do Karaoke too Part Number:R18164
Model: DVD816-4 they have a VGA out on the back that puts out 480P

I ran one of these with a Sony 1252 and it looked good. Even has a volume control on the remote. Not expensive either.

Thank you very much! I planned to go check out what they had sooner or later (I love that store, even though I had plenty of returns for some reason...)

Very good price too.

Thanks!
Cheers,
Alex
post #16 of 16
Thread Starter 
Picked up the last one of the 2 (the other didnt have a remote or anything), and I can say, for $20 its WELL worth it! It plays all disks, including burned copies, PAL or NTSC, and outputs progressive via VGA very well. Small, light, thin, stylish black with lots of blue LEDs on the front,
very damn worth the $20 Canadian for it. I will be picking up another one as soon as there are more, just in case.

Thanks again for the tip!
Cheers,
Alex
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