How to deinterlace 480i to 240p with a Sony CRT

[fagin]

Keeping up the oldskool CRT knowledge, I found out the following whilst "playing" the other night.

Hit (you may have to press it twice to switch into deinterlace mode) the button on the Sony remote that has the three green (teletext button) horizontal lines running across it for some 240p scanfest!!!

This basically does what a Extron RGB interface and the deinterlace function does on a B&O MX series CRT. It's pretty cool and looks so much better with say a PS2.

The only downside is that you get a teletext channel number in the top left of the screen. TBH though it doesn't detract from any game experience and the advantage of the pseudo scanlines more than cancels out this minor downside.

A video on YT, but it's hard to show the differences between the modes on video -> http://www.youtube.com/watch?v=L-eokXK9 ... ature=plcp

[matrigs]

that's pretty awesome

i'm curious if it will work with other crt tv's. have to find that out at home.

i think this model of sony has already a service mode ? you might be able to change ad least the colour of the channel number.

[fagin]

For whatever reason... these era of Sony's deinterlace when put into "teletext" mode. Why it would need to do that I don't really know..... but it's a "feature".

Some people have checked the later FD (pure flat trinitron) range and it doesn't appear to work on those.

Yes.... my model has the service menu, but nothing in that will change the colour of the channel number (not from what's in my service manual). I fellow YT'er commented on whether we could turn off the teletext OSD on the chassis by modding it - that would be awesome, but I can't see anything obvious on the chassis schematic for that part of the circuit. It's probably all in with the decoder IC.

[matrigs]

well dosen't work on my "unimor" crt telly. sadface on.

kind of weird actually that when doing as you do the screen just derps out as it would totally loose sync. so something IS going on but definitely no scanlines here.

[tcancian]

So lucky , congrats! And also, thanks for sharing your discovery.

My 38" Flat Sony CRT doesn't have that out of the box but looking at the service menu calibration routine it says something about "Fix Horizontal Sync Slice Level". I wonder what that is about, is there someone in this forum with knowledge on the topic?

It would be awesome if there was a way to manually set non-interlace mode for all 480i content on CRTs.

[Fudoh]

It would be awesome if there was a way to manually set non-interlace mode for all 480i content on CRTs.

it wouldn't look any good.

[fagin]

Agreed.

[rugdoctor]

Does it still have shimmery lines on certain areas of the screen like the extron rgb interfaces?

[fagin]

Dependant on any filtering, yes.

[rugdoctor]

Wonder whats the result of double deinterlacing, using the extron interface and the inbuilt de-interlacing function of the crt? Anyone game enough to find out?

[Overkill]

Anyone knows where is the "Test Button" for a sony crt tv? the remote controller is a rm-836 The service manual says to press "test button" twice, but i don't know where is it

[fagin]

Not heard of that before.

What TV you got and what are you trying to do?

[Overkill]

Im testing on a small Sony KV-M1440E, i can enter the service menu (TT), but i can't enter the OSD TT mode that allow me other things. See here

[Fudoh]

really ? never had problems with that. If you got TT to display on screen you should be able to cycle through the menus by using the standard menu button.

[Overkill]

Yes, i got the TT, but reading the manual i was thinking it needs to say OSD TT

[fagin]

As Fudoh says... Using the menu button should now bring the service menu up once in TT mode.

[Overkill]

Im going to try, thank you both

[fogueman]

Have you guys tried Xbox 1 emulators on a Sony Crt with this method??

Would that give the same results as deinterlacing/downscaling xbox with one of these extron emotia units?

[fagin]

The Sony doesn't care about the source.... 480i is 480i regardless of the console. The same trick will work.

[JBueno MD]

This only works in PAL sets right?

[fagin]

The success rate (as in which models this works with) appears to be extremely limited.... I'm not aware of any NTSC models included within this niche list - that's not to say that no NTSC models have the ability though.

[fogueman]

well it seems that my sony european 25" trinitron supports the deinterlace mode.

Tried with Metal Slug Anthology ps2 (480i), rgb mode. Pressed the teletext button and scalines got back, also the image was much better with no flickering.

The only drawback I can notice is that it also darkens the image (more than it would if you load the same metal slug anthology with the 240p patch out there).

Do you adjust the brightness before pressing the teletext button, fagins?

[fagin]

I never personally found it an issue.... if altering brightness / contrast has the desired effect, go for it.

[nyder]

Has anyone run across this deinterlace function on a PVM or just consumer grade telly's?

Cheers,

Nyd

[fogueman]

I never personally found it an issue.... if altering brightness / contrast has the desired effect, go for it.

Well, trying it more extensively , I honestly have to say that it´s not really an issue. Obviously when you deinterlace and the scanlines come up to glorify the image, they also darken it a bit, but it´s not really a dark image. It is just compared with the 480i interlaced image. My first impression was wrong I think.

Very neat feature, but it doesn´t get totally rid of the 480i flickering. It might be caused by my rgb cables, though. My ps1-2 cable is kind of crap.

[fagin]

Has anyone run across this deinterlace function on a PVM or just consumer grade telly's?

Cheers,

Nyd

I haven't come across this functionality on pro gear yet.

[fagin]

I never personally found it an issue.... if altering brightness / contrast has the desired effect, go for it.

Well, trying it more extensively , I honestly have to say that it´s not really an issue. Obviously when you deinterlace and the scanlines come up to glorify the image, they also darken it a bit, but it´s not really a dark image. It is just compared with the 480i interlaced image. My first impression was wrong I think.

Very neat feature, but it doesn´t get totally rid of the 480i flickering. It might be caused by my rgb cables, though. My ps1-2 cable is kind of crap.

You won't get rid of the flicker completely unfortunately. It's the same as using the de-interlace function on the B&O TV's and the Extron RGB interfaces....... you still get a trace of flicker (although it's drastically reduced over 480i).

[fogueman]

Yes, that´s what I thought. Well, now it seems I won´t need a extron emotia to deinterlace xbox emulators. I will test it as soon as I get my Xbox back from a friend.

Otherwise, i´m going to use the 240p hex patch for ps2 titles, even when they look good i still prefer native 240p with no flickering at all.

[filevans]

hello all,

does anyone know if there are any 29" (sometimes referred to as 28") sony tvs that support the deinterlace mode with the teletext button

or if not, 25" models?

also which bang & ollafson tvs support the deinterlace?

my panasonic 28" tv puts scanlines on 480p already, i've seen a couple of tvs do this in my time,but very rare

thanks to all

[filevans]

which 25" sony trinitrons support de-interlace, please does anyone know?