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drngr

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Join date
15-Jan-2013
Last activity
17-Jun-2021
Posts
317

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Post
#656358
Topic
Info: Comb Filter Testing
Time

I also did a bunch of searches and found which Panasonic DVD recorders use which chips. Presumably the ones with matching video processors have the same comb filter performance. If you want to try searching the service manuals and whatnot yourself, they seem to consistently refer to the A/V processing chips as IC3001.

C1AB00000791:
DMR-E20 (3 in)
DMR-E30 (3 in)
DMR-HS2 (HDD, 3 in)
DMR-T3030 (HDD, 3 in)
DMR-T3040 (HDD, 3 in)

C1AB00001979:
DMR-E65 (3 in)
DMR-E75 (VCR, 2 in)
DMR-E85 (HDD, 3 in)
DMR-E95 (HDD, 3 in)
DMR-E500 (HDD, 3 in)
DMR-EH50 (HDD, 3 in)
DMR-EH55 (HDD, 3 in)
DMR-EH60 (HDD, 3 in)
DMR-ES10 (3 in)
DMR-ES15 (2 in)
DMR-ES20 (2 in)
DMR-ES25 (2 in)
DMR-EZ17 (2 in)
DMR-EZ27 (2 in)
DMR-T6070 (HDD, 3 in)

C1AB00002083:
DMR-EA38V
DMR-EH75VP
DMR-ES30VP
DMR-ES35V
DMR-ES40VP/VPC
DMR-ES45V (VCR, 2 in)
DMR-ES46V (VCR, 2 in)
DMR-EZ37V
DMR-EZ475V
DMR-EZ47V
DMR-EZ48VP/VPC
DMR-EZ485VP
SA-HT830VP/VPC
SA-HT833V

C1AB00002100 (PAL only?):
DMR-ES10EB/EBL/EC/EG/EP (UK, Ireland, other EU countries)

C1AB00002084 (PAL only?):
DMR-ES30VGN/VEC/VEE (VCR, 2 in)
DMR-ES35VEG/VEC (VCR, 2 in)
DMR-EZ48VEB (VCR, 2 in)

C1AB00002379 (PAL only?):
DMR-EH55EC/EP
DMR-EH56EG
DMR-EH65EE/GC/GCS/GN (Russia, etc.)
DMR-ES15EB/EBL/EP/EC/EG (UK, Ireland, other EU countries)
DMR-EX75EB/EC/EG (UK, other EU countries)
DMR-EX79EG
DMR-EX85EB/EG (UK, Germany)
DMR-EX768EB/EF/EC/EP (UK, France, other EU countries)

Post
#656349
Topic
Info: Comb Filter Testing
Time

Here is a test of the "XCard" PCIe board I mentioned some months back in the cap card thread, put together by a VideoHelp member called danno78. It's based on an AVerMedia mini-PCIe capture card that does 3D Y/C built into some laptops. According to a member who was pissed off at danno78 for obscuring its origins, it uses the SAA7136 v2.

Snell & Wilcox 4:3 Pattern 1 - three tests

  • Philips DVP642 - CVBS - Panasonic DMR-E20 - YC - XCard
  • Philips DVP642 - CVBS - Panasonic DMR-ES15 - YC - XCard
  • Philips DVP642 - CVBS - XCard

 

Negative effects of DVD recorder passthrough:

Both have added noise and smear the chroma resolution a little.

The EMR-E20 shifts the image <0.5 pixels to the left, and causes the bottom line to jitter.

The DMR-ES15 mattes off ~2.5 pixels along the right edge. Mine brightens the image, which may be fixable by changing the "Lighter/Darker" setting in the Setup menu, but I can't find a universal remote that will give me that button.

I don't know how they affect the left edge of the image, because my DVD players only output black there.

Comb filter comparison:

The DMR-E20 has a small amount of dot crawl in the 1.0 and 1.5 MHz chroma patches. Other than that, the two Panasonic recorders seem to function equivalently.

They both have a small amount of dot crawl near the top of the image not present with the XCard. Meanwhile, the XCard has additional rainbowing in the center third of the moving zone plate (both horizontally and vertically).

All three require the zone plate to be still for 4 frames to be completely clean. The 3rd frame has slightly less rainbowing with the XCard.

Here is a quick comparison of a shot change on an LD to show checkerboarding: DMR-E20 vs XCard. The XCard has a bit less.

 

Another card that does 3D comb filtering is the GOTVIEW X5 3D Hybrid PCI-E (the one without "3D" in the name does too, but uses a hardware MPEG-2 encoder). Some PAL testing of that hardware encoder was done by PCtuner.ru, without the SW plate. The ADC is CX23887, also used in the Hauppauge WinTV-HVR-1250 (software) and WinTV-HVR-1800 (hardware). But Hauppauge's comparison table claims that the HVR-1250 doesn't have a 3D comb filter. I guess they forced it into 2D mode...?

Post
#656319
Topic
High-End video capture cards
Time

No '90s player* has a comb filter worth using, so go for the TVW750PCIE if you are more interested in capturing LD than native S-Video, YPbPr, or digital formats.

*I would just say "no LD player" but I don't know anything about the units made in the '00s when good 3D Y/C tech could have been incorporated.

By the way AnctuFaalb, when you get a chance could you edit this post to note that you're referring to the different USB version? Or have you seen AGC problems with both TVW750USB (no 3DYC) and TVW750PCIE (has 3DYC)?

Post
#647010
Topic
Info: Recommended Editions of Disney Animated (and Partially Animated) Features
Time

Doctor M said:

"In fact, Sleeping Beauty, was the second film in history to undergo this extensive computer restoration process."  (The first being the 1994 release of Snow White.)

Maybe not entirely... but 'extensive' is a troubling word.

Edit: I think the point they are making is the restoration was DONE for the 1994 release, not started in 1994.

I found the press release from June 24, 1993 (20 years ago to the day!):

Disney Classic 'Snow White' Undergoes Complete Digital Restoration at Kodak Facility

Nearly 120,000 frames of 35 mm motion picture film were restored. Each frame contained approximately 40 megabytes of digital data, roughly the entire storage capacity of some desktop computers.

In the course of searching I also came across an article that said the scanner ran at 3 seconds per frame, so that would be 100 hours of ingest time alone.

Post
#643572
Topic
Info: Comb Filter Testing
Time

Snell & Wilcox 4:3 Pattern 1: Sony DVP-NS50P -> Panasonic DMR-ES15 -> Diamond VC500

It looks virtually identical to the performance of the DMR-ES10, unsurprisingly.

For quick comparison:


V1 = AVISource("Comb Filter - Panasonic DMR-ES10.avi").AssumeTFF().Bob()
V2 = AVISource("Comb Filter - Panasonic DMR-ES15 to Diamond VC500 [128-128-128-140-0].avi").CropPad(8,0,0,0).Trim(0,30).AssumeTFF().Bob()

Interleave(V1,V2).Histogram()

function CropPad(clip c, int x1, int y1, int x2, int y2, int "color") {
   color = Default(color,color_white)

   c.Crop(x1,y1,-x2,-y2).AddBorders(x2,y2,x1,y1,color)
}


Meanwhile, I've tried two different DVD players as source, and with both I get a 15-frame cycle of partial rainbowing on the second Snell & Wilcox pattern. The Sony comes out considerably worse than the other one.

Snell & Wilcox 4:3 Pattern 2: Sony DVP-NS50P -> Panasonic DMR-ES15 -> Diamond VC500

Post
#642257
Topic
Preserving Hi Def laserdiscs (MUSE)
Time

A couple of the shot-on-HD titles were captured to MPEG-2 a few years back but with one exception they seem to have stayed within the private Russian torrent scene.

It's always been said these HD video titles look better than the '90s telecines, so adjust movie expectations accordingly.

http://forum.lddb.com/viewtopic.php?p=34938#p34938

I'm interested in T2 and some of the test discs but only if a group-buy or your "buy + resell + compensation" scheme can be arranged.

Post
#642253
Topic
Future of Home Video
Time

AntcuFaalb said:

Even if we can get a lossless compression algorithm that reduces the size by a factor of three, then we still need a medium on which to store ~222GB movies!

Compression ratios are higher for HD than SD. I've done YUY2 720p and 1080i video game captures with lossless compression ratios of 4:1.

If there are ever 8-layer Blu-rays Discs...