Info: Comb Filter Testing — Page 6

Here’s a test of the Theater750HD comb filter with PAL material.

Pioneer dv-360 -> Composite Out -> Theater750HD-PCIE.

Here’s the raw video (390 MB).  If somebody knows of a place to host this longer please let me know.  This link dies after 7 days.

Wow, that's great!

About file hosting: mega.co.nz gives you 50GB free, and files *should* stay there as long as you wish, so...

althor1138: Can you test it with your Pioneer CLD-S315 please? Thanks!

YUP!  Here’s an example of the 3DCF failing. This only happens around scene changes as far as I can tell.

This is S315 -> composite out -> Theater750HD.

Here’s the raw video (104 MB). The link expires after 7 days.

I will take a look at mega.co.nz and see what they are all about.

^^^ ouch!

It's certainly not the worst I've seen. I think it does a very good job.

I think we've found an excellent PAL 3DCF. We should now turn our attention to fighting these shot-change artifacts.

Yeah. Too bad that the comb filter is not adjustable because I imagine that turning the adaptivity to favor 2d a little more than 3d would probably eliminate this entirely.

LD-decode has a good 2d filter already implemented that could be used though. To be honest I'm not sure PAL really needs 3D comb filtering because the output from LD-Decode looks as good or better than this.

Are there any PAL compatible 3DCF's in avisynth?  Tcomb does not work with PAL.

althor1138 said:

Are there any PAL compatible 3DCF's in avisynth?  Tcomb does not work with PAL.

None that I know of. They're too damn hard to write. NTSC 3DCFs are much easier.

I wonder if the same problem will arise with NTSC, too...

One thing: few days ago I was joking with laserdisc and external comb filters (inside DVD recorders) and I noted that passing through one of them, the phase was inverted - so, the phase inversion trick could work... but sadly, as they are spatially not aligned, and the comb filters between LD player and DVD recorded threat the signals in a quite different manner, it's impossible to use them to work... hope to find out an external hardware "piece" that could do somehow the phase inversion, as this will be the optimal solution... IMHO... thanks to AntcuFaalb, now I cannot think of anything else! (-^,)

I purchased an ATI Theater 550PRO card (Dell DH347). I'll run it through an extensive series of tests when it arrives.

metaleonid said:

I sold my ATI 550 PCI this April on eBay. I now wonder if I sold it to you (Fremont, CA) :)

I don't think so. I purchased it only a few days ago.

Was it a Dell DH347?

Report: The 550's 3DCF is entirely configurable unlike the 750. I'm getting accustomed to configuring it now.

althor1138: You can force it into 100% 2D mode. This might help with your PAL captures.

Observation: You MUST access and then re-apply your 3DCF settings every single time you want to use the card. It otherwise uses a peculiar second set of defaults which results in a crummy image.

I'll do my write-up tomorrow. I've got to go to bed!

I have a 550 here, just tried it, it works well on test patterns, not sure how it will do on transitions.

I used to capture with the 3DCF on, and then again forced to 2D, used software to tag scene changes and pop the 2D capture into the 3D one for the transition frames. Tedious, but works well.

AntcuFaalb said:

I'll do my write-up tomorrow. I've got to go to bed!

 That is a l-o-n-g 24 hours ;^P

Updated links. Pics should be visible once again.

test pattern
https://originaltrilogy.com/topic/Comb-Filter-Testing/id/15421/page/5#743797

video sweep
https://originaltrilogy.com/topic/Comb-Filter-Testing/id/15421/page/5#743799

color bars/solid colors
https://originaltrilogy.com/topic/Comb-Filter-Testing/id/15421/page/5#743800

theater750hd-pcie PAL comb filter performance
https://originaltrilogy.com/topic/Comb-Filter-Testing/id/15421/page/6#776668

theater750hd-pcie PAL comb filter failure
https://originaltrilogy.com/topic/Comb-Filter-Testing/id/15421/page/6#776674