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Info: Comb Filter Testing — Page 5

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Yes, a 4-line 2D comb filter.

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metaleonid said:

Compro VideoMate TV Ultra

I can't find one for sale anywhere. Where did you buy yours?

A picture is worth a thousand words. Post 102 is worth more.

I’m late to the party, but I think this is the best song. Enjoy!

—Teams Jetrell Fo 1, Jetrell Fo 2, and Jetrell Fo 3

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3d comb filter is good. But for some reason overall image is blurrier. I can't explain why. I can test for you while it's still in my computer. I plan on taking it out.

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metaleonid said:

3d comb filter is good. But for some reason overall image is blurrier. I can't explain why. I can test for you while it's still in my computer. I plan on taking it out.

Thanks, I'd appreciate that.

Did you try calibrating the "sharpness" setting (if it has one)?

It sometimes shows up in the "proc amp" settings.

A picture is worth a thousand words. Post 102 is worth more.

I’m late to the party, but I think this is the best song. Enjoy!

—Teams Jetrell Fo 1, Jetrell Fo 2, and Jetrell Fo 3

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It has sharpness, but it makes things worse (ringing). Also I try not to use VirtualDub with this device because it doesn't have access to Philips native registry. I use this:

http://auzol.narod.ru/index_e.html

Here I get manual gain level.

PM me. I may consider lending the card to you.

 

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It looks like DIAMOND released a new driver for the DIAMOND ATI Theater 750 PCIE (TVW750PCIE) on 2013-09-10.

Get it at the following hyperlink under "Support & Downloads": http://www.diamondmm.com/tvw750pcie-diamond-pcie-hd-tv-tuner-card.html

Please tell us if it fixes the AGC issue!

A picture is worth a thousand words. Post 102 is worth more.

I’m late to the party, but I think this is the best song. Enjoy!

—Teams Jetrell Fo 1, Jetrell Fo 2, and Jetrell Fo 3

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There's no driver by Diamond. This particulare driver is by AMD. On the Diamond website there's a link to the driver of AMD.

Also AFAIK the AGC problem is in hardware, not in driver.

 

Last but not least 750 PCI-e's comb filter is not that great for LaserDiscs.

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metaleonid said:

Also AFAIK the AGC problem is in hardware, not in driver.

Possibly. It could also be the driver dynamically modifying a register value on the chip in response to its own analysis.

A picture is worth a thousand words. Post 102 is worth more.

I’m late to the party, but I think this is the best song. Enjoy!

—Teams Jetrell Fo 1, Jetrell Fo 2, and Jetrell Fo 3

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 (Edited)

Anyone wanna buy an AVerMedia H789 to test? >.> I can't figure out whether the "H789-C" on eBay removes the analog inputs, or if you need a dongle of some sort.

It's a discontinued Euro model that uses Conexant CX23888. The driver adds a registry setting to enable or disable the 3D comb filter.

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I'm always angry when I watch my parents' little 13" HDTV because of how good the SD video quality is. The 3D comb filter is just ridiculously effective, not only with LD but also with super-noisy analog cable signals (and the noise filter turned off). The only rainbows I saw last time I was there were on a black-and-white striped shirt, and they went away as soon as the character stopped moving.

They got this thing on sale for under $75, meanwhile there are $500 capture cards still made with 2D-only filters.

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drngr said:

I'm always angry when I watch my parents' little 13" HDTV because of how good the SD video quality is. The 3D comb filter is just ridiculously effective, not only with LD but also with super-noisy analog cable signals (and the noise filter turned off). The only rainbows I saw last time I was there were on a black-and-white striped shirt, and they went away as soon as the character stopped moving.

They got this thing on sale for under $75, meanwhile there are $500 capture cards still made with 2D-only filters.

It might be possible to rip the board out and use it standalone if we can figure out how to convert LVDS.

A picture is worth a thousand words. Post 102 is worth more.

I’m late to the party, but I think this is the best song. Enjoy!

—Teams Jetrell Fo 1, Jetrell Fo 2, and Jetrell Fo 3

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The comb filter in my Dell 2408WFP monitor is also nice, for some reason. It has some oversharpening that can't be tuned though, and between the rainbowed frames and clear frames is a frame where the rainbowed area is just opaque grey.

Camcorder shot

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I was wondering if anyone would like to check the 3 versions of a live gig that I did from LD. ATI 750 PCIe, DMR-ES24 to Blackmagic Design and S-Video to VC-500. All from Pioneer Elite LD-S2. These were not test pattern, but the real footage. Each m2v file is about 4Gb.

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I'm currently working on writing my own software 3D motion-adaptive comb filter. The prototype is in Python; the release code will be in C (ANSI C89/ISO C90) for Vapoursynth.

My #1 goal is to comb as much as possible without introducing artifacts.

The results, so far, are extremely promising.

A picture is worth a thousand words. Post 102 is worth more.

I’m late to the party, but I think this is the best song. Enjoy!

—Teams Jetrell Fo 1, Jetrell Fo 2, and Jetrell Fo 3

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_,,,^..^,,,_ said:

There is some hope for a virtualdub filter, so it could work during video capture?

It would probably be too slow. The optical flow algorithm I'm using is pretty exhaustive and I call it several times.

I'm shooting for quality and low artifact risk rather than speed.

A picture is worth a thousand words. Post 102 is worth more.

I’m late to the party, but I think this is the best song. Enjoy!

—Teams Jetrell Fo 1, Jetrell Fo 2, and Jetrell Fo 3

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Cool. I guess whatever I captured via S-Video into VC500 can qualify to be your software's client.

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 (Edited)

HF9G vs R7G using the ati theater750 PCI-e card. The raw video files are available on a.b.sw. As always, view the full sized picture. Left click to view full sized.
Test Pattern Frame #1

TPframe1.png

Test Pattern Frame #2

TPframe2.png

Test Pattern Frame #3

TPframe3.png

Test Pattern Frame #4

TPframe4.png

Luke threw twice…maybe.

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 (Edited)

Video Sweep Frame #1

vsframe1.png

Video Sweep Frame #2

vsframe2.png

Video Sweep Frame #3

vsframe3.png

Video Sweep Frame #4

vsframe4.png

Luke threw twice…maybe.

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 (Edited)

Color Bars Frame #1

CBframe1.png

Color Bars Frame #2

CBframe2.png

Magenta Frame #1

Mframe1.png

Blue Frame #1

Bframe1.png

Green Frame #1

Gframe1.png

Luke threw twice…maybe.

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 (Edited)

I've been studying the avisynth branch of the Bifrost filter. Even though it doesn't use a sophisticated motion estimation algorithm (e.g., optical flow) I've found that it does a better job than pretty much every other software 3DCF* out there currently, TComb included.

I've been torture-testing it too. At reasonable settings it's hard to get it to artifact. It has an altclip parameter which gives you the ability to provide a different clip as an argument for the blocks it classifies as being "in motion". You can use this to process only the motion blocks with a different filter; e.g., the low-pass filter I've mentioned in other threads.

I've been using:

    c.Bifrost(altclip=c.Spline16Resize(180, 480).Spline16Resize(720, 480))

This allows me to 3DCF static blocks and LPF motion blocks only. It works really well for the footage I'm working with at the moment.

You can considerably improve its motion detection by getting rid of all dot crawl first since it uses the luma plane to determine if a block is in motion or not and dot crawl screws that up.

I suggest capturing a S&W zone plate with your setup in order to find the best values to provide as arguments for the luma_thresh and variation parameters.

(* Keep in mind that this is for chroma only. You'll have to go elsewhere for dot crawl.)

A picture is worth a thousand words. Post 102 is worth more.

I’m late to the party, but I think this is the best song. Enjoy!

—Teams Jetrell Fo 1, Jetrell Fo 2, and Jetrell Fo 3

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Thanks for the information.  I will give that a try. I have already installed bifrost awhile ago but haven't played with it. I do something similar with tcomb but since it doesn't have an alt clip parameter I do this:

s1d1=avisource(1d comb output from ld-decode)

s1d2=avisource(2d comb output from ld-decode)

s1d3=s1d1.tcomb(2,4,5,5,6,false,12)

s1d3mask=s1d1.tcomb(2,4,5,5,6,true,12).greyscale().invert()

s1adapt=overlay(s1d3,s1d2,mask=s1d3mask,mode="blend",opacity=1)

It's kind of a hack but works like it should.

So with bifrost it might be best to use a clip which has already been 2d combed? If so, a person could use tcomb/a good 2d comb to eliminate dot crawl and then bifrost to eliminate rainbowing.

Luke threw twice…maybe.