OSSC (DIY video digitizer & scandoubler)

[eric90000]

Received my OSSC in Ireland today, can't believe line triple mode works on 2 out of 3 HDTV's in my house.....just not the one in my game room, typical! I have to say I've never seen the Mega Drive look so good, line double mode looks pretty good but line triple is so crisp. For those interested, here are the TV models:

Samsung UE32J5100AK – | Lx2 YES| Lx3 YES| SNES (not yet tested)

LG 47LD450-ZA – | Lx2 YES| Lx3 YES | SNES (not yet tested)

Sony KDL40W705CBU – | Lx2 YES| Lx3 NO | SNES YES

[atheistgod1999]

If you people are so concerned about input lag, why don't you use PC monitors?

[Thomago]

More OSSC impressions:

- Great case, I love the rubber feet! ... Yes, I'm serious about that. Coming from the Framemeister, I was constantly annoyed by the fact that it was too light-weight / its rubber feet too non-stick to ensure a sturdy standing. Did you see the "Powered on for the first time" from my "OSSC impressions" gallery? The Framemeister would be wobbling on its back rubber feet there.
- I initially had problems with my SNES (US 1-CHIP-01, connected with a DOL-013 Nintendo Gamecube RGB cable): Linedouble mode didn't work, linetriple mode was unstable. Setting "Analog sync LPF" to "2.5MHz" got rid of that.
- I'm using a PC monitor (iiyama ProLite XB2783HSU). Against my expectations, 480i/576i passthrough works with it! It does bob deinterlacing like the OSSC, but I dare to say: It does it better (the bobbing is less apparent). If anybody's interested, I can make a comparison video.
- "Zooming away" pal bars is really simple. Neat!

Also, have another screenshot:



(PAL Grandia in linetriple mode, with PAL-bars-be-gone applied)

[Fudoh]

- Great case, I love the rubber feet! ... Yes, I'm serious about that.

3M Bumpon: I can't even count how many of packages of these I've used on devices all around the house...

It does bob deinterlacing like the OSSC, but I dare to say: It does it better (the bobbing is less apparent). If anybody's interested, I can make a comparison video.

please do! The OSSC is still not optimized in this regard. It needs an adjustable line offset between the two fields. Markus knows about this and I hope this is coming at some point.

[xadox]

Pioneer remotes are also working with the OSSC.
All of my three Pioneer AVR remotes are working.

[BuckoA51]

Thanks for the feedbacks

[Thomago]

@Fudoh:

Passthrough off (deinterlacing by OSSC) https://drive.google.com/open?id=0B06nK ... lhGRlpoM3c
Passthrough on (deinterlacing by monitor) https://drive.google.com/open?id=0B06nK ... mJTcGMtMlU

Sorry, only 30 fps - that's all my smartphone is capable of...

Laymanish opinion: Seems as if the monitor applied vertical bilinear upscaling to the individual fields, resulting in a softer look.

[RGB32E]

- I initially had problems with my SNES (US 1-CHIP-01, connected with a DOL-013 Nintendo Gamecube RGB cable): Linedouble mode didn't work, linetriple mode was unstable. Setting "Analog sync LPF" to "2.5MHz" got rid of that.

Did you leave the 220uF cap inline on the composite video signal in the SCART plug hood PCB? Removing that cap in the DOL-013 might resolve the issue without having to resort to enabling the sync LPF. I haven't had to enable the sync LPF and am using a straight CSYNC connection from my 1CHIP-01.

[neorichieb1971]

Does the OSSC require a certain kind of sync?

Now these units are rolling out in numbers it would be nice to have the cable builders do tests for the best results. That way we can get the best cables and build the best chain of connection from console > OSSC > TV.

[Thomago]

Did you leave the 220uF cap inline on the composite video signal in the SCART plug hood PCB? Removing that cap in the DOL-013 might resolve the issue without having to resort to enabling the sync LPF. I haven't had to enable the sync LPF and am using a straight CSYNC connection from my 1CHIP-01.

Neither did I manipulate the cable in any way, nor do I even know how to open it.

[Thomago]

Welp... should have seen that coming.

So my monitor - the aforementioned iiyama ProLite XB2783HSU - sucks at processing 480p/576p, as there's no way to get the aspect ratio right for 4:3 stuff (I have the choice between an "Aspect Mode", that upscales these resolutions as if they had square pixels, or a "Full Mode", that stretches them to fill the screen).

The - according to my monitor - 1440x480/1440x576 resolutions the OSSC outputs if TX mode is set to "DVI" and 480i/576i passtrough to "On" are generally upscaled to fill the screen, so no salvation there.

I have experimented with my graphics cards's custom resolution tool and lo and behold:





The monitor can display both 1920x480@60Hz and 1920x576@50Hz (1920x480@50Hz unfortunately doesn't seem to work) and upscales them to fill the screen.

Would it be possible to make the OSSC output these modes? Together with an option to toggle between 16:9 (image fills the screen) and 4:3 (image is mapped to 1440x480/576, as seen in DVI+480i/576i passthrough mode) these would solve my particular problem AND provide the means to achieve a maximum horizontal definition for all users with compatible displays.

EDIT: Just saw (https://www.videogameperfection.com/for ... 8p-linex4/) that other users seem to have similar problems with their monitors.

[BuckoA51]

More OSSC invites this morning! If you're number 633 or under you should have got one, if not, contact me so I can look into it.

[citrus3000psi]

More OSSC invites this morning! If you're number 633 or under you should have got one, if not, contact me so I can look into it.

Ahhh, You should have went to 640 so I could have gotten the email

[lev11]

@Thomago with the XB2783HSU do you also find scanlines ok at 480p but miss-spaced if line triple to 720p on a snes?

[Thomago]

@lev11 Miss-spaced? Nope, couldn't say that. But just see for yourself:



(I set scanline alignment to "Bottom" btw. Don't know if "Top" would have been more authentic.)

[NormalFish]

Bucko, we still on pace to get to around 800 with this batch?

[lev11]

@Thomago looks fine, that is line triple yes? I need to check again think it was older firmware.

[BuckoA51]

Ahhh, You should have went to 640 so I could have gotten the email

Keep an eye out tomorrow

Bucko, we still on pace to get to around 800 with this batch?

Seems likely, I'd say current uptake is around 20 to 25% of people contacted.

[Thomago]

Just connected my DOS PC to the OSSC via VGA. This is what happens if I input 1920x1080:



I already increased the horizontal sampling rate from 2200 (standard) to 2300 (maximum), but to fill out the screen, I guess I would have to increase it even further.

Is there a reason that the sampling rate maxes out at 2300? If not, I humbly request a higher maximum

1280x720 via VGA worked well however, albeit with a bunch of fiddling in the timings menu.

@Thomago looks fine, that is line triple yes? I need to check again think it was older firmware.

Yes, it's linetriple mode.

[cruzlink2]

Quick question to those who already have a unit and used it. Anyone tried the OSSC with any other scaler than the DVDO ones? .

[bonzo.bits]

Anyone know if is possible to shrink the OSSC output area so that an exact 4x scale is achieved? Or expand for a 5x?

If so, how please?

Going by the wiki page it should be something to do with the advanced timing tweaker?

[Fudoh]

Anyone tried the OSSC with any other scaler than the DVDO ones?

which one do you have in mind?

[Das Muel]

Quick question to those who already have a unit and used it. Anyone tried the OSSC with any other scaler than the DVDO ones? .

I was using it with Micomsoft XPC-4 for a month or two. It looked great at 1080p. I've gone back to a direct hookup to my PC CRT now though, mainly just to simplify things a little.

[BuckoA51]

Here we go again! More OSSC invites this morning, if you’re number 746 or under you should have one, if not, get in touch.

[Seraphic]

Patiently waiting to receive my OSSC order invite from BuckoA51. But in the mean time, I wanted to ask for some suggestions on how to plan my setup. So I have two consoles, a PlayStation 2 and a Super NES. I recently started to convert from JP-21 to Scart and my plan was to plug both consoles into the OSSC using RGB Scart and then feed it into my into my PMS Crystalio II 3800. But the OSSC only has one of those inputs. And, from what I understand, the VGA input on the OSSC is unfiltered, so RGBs sources are not recommended and the SNES/PS2 both use RGBs for 240p/480i and PS2 uses RGsB for 480p. So what would would be a good way to go about this with a focus on maintaining picture quality?

[Fudoh]

Use component for your PS2. On the OSSC that's really a viable option. With the right settings you shouldn't have any noise related problems.

[Seraphic]

Use component for your PS2. On the OSSC that's really a viable option. With the right settings you shouldn't have any noise related problems.

Hi Fudoh,

I would like to keep them in RGB to take advantage of the OSSC/PMS Crystalio II 4:4:4 processing though.
Another option would be one of those 8:1 SCART-RGB switches or just a second OSSC.

[Fudoh]

We're talking analogue YUV. That's full color bandwith. The OSSC samples in 4:4:4, so you're not losing anything.

[Seraphic]

We're talking analogue YUV. That's full color bandwith. The OSSC samples in 4:4:4, so you're not losing anything.

I was under the impression Component cables sent video as 4:2:2 due to bandwidth limitation.

[Fudoh]

You're thinking of digital YUV (YCbCr) and it's variations. Here you can get 4:4:4 or 4:2:2 and since digital media compressed in YCbCr is just 4:2:0, the standard output from a DVD or BD player is YCbCr 4:2:2.