RGB on tv "rippling in brightness"

[Martin]

On my Pal Sharp Widescreen TV, it displays RGB from PS2 Games, Dreamcast and Saturn, and Gamecube PEFECTLY.
Also - it displays 60 and 50Hz from all of these sources fine.

NOW
here's where the strange stuff starts:
When watching XBOX games in 60Hz, the image gets uneven "striped" areas of bright/dark forming horizontaly accross the screen that appear and dissapear/move about depending on the contents of the image, it displays 50Hz Xbox output perfectly in RGB and 60Hz perfectly in Composite or S-video., but experiences this same "rippling" brightness on PS2 DVD playback through RGB.
Don't think this is macrovision as it affects Xbox games as well.

Now, from the looks of it, it LOOKS like the same sort of problems you get when RGB feedback occurs, however, there is no feedback occuring as there are no loops for feedback to even begin to occur in.

Any ideas on how to solve this without having to get a new TV?

As a note, the devices that appear troubled on this TV have been tested on two other TVs and worked perfectly on each.


:blink:

[kendrick]

Martin, what you're describing sounds vaguely like the Macrovision protection that goes along with PS2 DVD output. If you already have really early DVD drivers or have modded your PS2 to avoid this, then feel free to ignore me. But if memory serves, the DVD video output on the PS2 is deliberately designed to require composite or S-video output only. I can't find a source for that information, so somebody else please jump in and tell me if I'm on the money here.

-KKC, doing late holiday shopping. For himself!

[Martin]

Martin, what you're describing sounds vaguely like the Macrovision protection that goes along with PS2 DVD output. If you already have really early DVD drivers or have modded your PS2 to avoid this, then feel free to ignore me. But if memory serves, the DVD video output on the PS2 is deliberately designed to require composite or S-video output only. I can't find a source for that information, so somebody else please jump in and tell me if I'm on the money here.

-KKC, doing late holiday shopping. For himself!

Note that it also affects the Xbox games though, which doesn't do Macro vision at all.
Macro vision causes the entire image to cycle fromlight to dark/turn green or not display atall.
This is weird because the areas of light and dark are incomplete horizontal bars that change in length depending on what is being displayed and also move about when objects onscreen move (the bars flicker up and down is something onscreen moves)

[-Martin-]

Ok I just picked up a new DVD recorder and it's experiencing the same troubles on this TV as the Xbox.
Any ideas what settings on my TV could be adjusted to fix this problem?

Recap of the problem:
50Hz displays fine from all sources
60Hz displays fine from all composite and S-Video sources, but experiences a strange bands of bright and dark that move slowly and flicker on SOME RGB sources (but not all).

[Darklegion]

EDIT: Sorry didn't read your last post cloesly enough.

[-Martin-]

Ok, the problem seems to be gbigger than I at first thought.
The TV ripples on some 50Hz RGB sources as well.
This is so odd?
Why is it rippling on Xbox but not on GC?
o_O

[Endymion]

I guess I would have to see this to get a handle on it exactly, but I understand that bending or deforming of darker images against brighter ones occurs more easily in CRT units that have weaker power supplies. This is a factor to look for when setting an ideal contrast/picture to keep the level under. It does sound like you're saying there's a pattern to this, which would seem to point to an inefficiency or some interferance though.

[viletim!]

Martin,
Are you sure there is no earth loop? Does disconnecting the TV aerial help?

[-Martin-]

Ok, I'm gonna post a short video clip of the problem in a few mins, Just need to get the camera! XD

[Martin]

I guess I would have to see this to get a handle on it exactly, but I understand that bending or deforming of darker images against brighter ones occurs more easily in CRT units that have weaker power supplies. This is a factor to look for when setting an ideal contrast/picture to keep the level under. It does sound like you're saying there's a pattern to this, which would seem to point to an inefficiency or some interferance though.

Yes, I believe you maybe onto something here, but why is it only doing it on RGB? Because surley if it's a PSU problem it should be doing it from every source? No?

Anywho, here are some pics and a short video clip. I didn't have the DVD on hand at the time, but the contrast bars are most visible on the Paramount introduction screen when the white stars fly across the dark blue sky from War of the Worlds (Each star gets a nice rippling dark band around it).




And the video:
http://gearguy.pwp.blueyonder.co.uk/TV_Problem.wmv

EDIT: I tried toying around with the contrast and brightness controls, doing this can get the banding to go away while the image is still (paused) but as soon as I press play the banding comes back. IE. changing brightness and contrast has no effect on it.

[Aidan]

Are these a single horizontal line that moves slowly up or down for 50Hz games, and rolls much more rapidly downwards for a 60Hz game?

[Martin]

Are these a single horizontal line that moves slowly up or down for 50Hz games, and rolls much more rapidly downwards for a 60Hz game?

Your reply might be a bit more helpful if it made any sense...

=/

It does it on 50Hz too!!!

Read the posts ^^^^^^^^


RTFM  

[Darklegion]

Is your xbox the only source of this problem? I read your above posts but that was not made totally clear.If so are the RGB lines on your XBox cable run though capacitors?.If they are try removing them and if not, try adding them.
Have you tried another XBox? If you have the 1.6 version it is known for having the worst video output of any xbox revision.IIRC problems with the RGB output is one such problem, although this is just a vague recollection.
You could try asking this question in xbox-scene's A/V section, the standard of knowledge there is generally low, but there are a lot of people that frequent there, and one of the more knowledgable of those might come across your post.

[Guest]

It does it on Ps2 when watching DVDs, DVD recorder whan watching DVDs, and Xbox when playing games in 60hz (but not on 50 ) :blink: