100hz television + soft 15khz picture problems (now with movie)

[Joey Butafuko]

I'm not sure if 100hz is commonly known around the world. It doubles the projection of each picture, this results in less flickering and such.

I made the vga ->scart cable and installed soft 15khz.
It works great on 2 regular (50hz) tv's but i have a problem on a 100hz tv.

I can describe it best as an interlaced effect. With Metal Slug it's really noticable and when you move the character the graphics get all jagged. The horizontal lines of the tube don't line up straight on top of eachother.

I've been screwing around in the menu's and options but no result.
I'm suspecting it has something to do with the 100hz technology, which i can't turn off.

Maybe someone knows how to fix it?
It's really sad because it's an excellent big Sony Trinitron with a flat tube 

[Ummon]

I vaguely remember someone a while ago talking about something like this here. Do a search under 100hz TV, etc.

[Joey Butafuko]

I've been searching for hours, nothing shows up 

[Joey Butafuko]

No one has a clue??? 

[Ummon]

Only thing I can think of is you need to create special 100hz modes. Might help to see a video of what you're talking about.

[Silver]

Hmmm, typically a 100Hz TV is designed to reduce flicker. It does this (typically) by:

convert an analogue signal to digital, de-interlacing from 50i to 50p, frame doubling to 100p and then interlacing to 100i,  and finally converting back to analogue for display.... (This is from a UK perspective, where 50Hz is the standard). The image processing is also probably tuned for TV/Film, not lo-res gaming.

The bottom line is that soft-15Khz programs your gfx card to out a lo-res authentic video image ready for CRT display (All the syncs'n'pulses are ready to drive the CRT directly). Your 100Hz TV is unfortunately digitizing and processing the crap out it, at a consumer-based price-point (read: cheap processing) which is probably causing artifacts on high-contrast images that you don't get much of in film/tv (i.e. what they tested the tV on).

Some 100Hz tv's let you turn off the 100Hz processing - this would help a lot - but a lot probably can't turn it off.

To be honest, there is not much point using soft-15Khz on a 100Hz Tv (IMHO) as you arn't getting the native image anyway.

[Joey Butafuko]

Indeed Silver, i was already thinking the same but less detailed  

I got this tv for free and it's nice and big  
It's a shame it's causing problems, i didn't see any messages about it... i'm the first one with a 100hz pulling this off?   Regular 50hz tv's also have this high pitch sound that drives me crazy, 100hz don't, so it sucks extra much  

I did make a movie with a photocamera, suprisingly you can actually see the effect.
I had to stretch my arms to get this done, i'm not this bad with metal slug just when it's one handed  

Focus on the background and you'll see the effect when the picture moves. When i pass the Bakery (26sec) check out the red bricks, you clearly see these black jagged lines appearing. I'm still hoping it can be fixed.

[Ummon]

The page says I need a username and password to log into whatever it is. You know, I'm wondering if you're just getting regular old tearing. Also, there's no reason you can't use another input; try S-video and component. Then you don't have to worry about anything, and all games will display properly, stock.

[Joey Butafuko]

Great, i took the account link not the public link  
s-video is crap quality, i can't get it to work at all, it's even worse.

[Ummon]

Decent video quality vid, though not sure if it's enough to get across what you're seeing, because I found it pretty minor. And my inclination is to think it's some sort of tearing, given the exotic video of that game. So try out all the suggestions for addressing tearing.