Aliasing, artifacts and moire?

Comments

craftech wrote on 9/29/2011, 10:55 AM
I want to post this first without saying how I did it:
================================

Nice handling of twitter for Jerry's Voodoo Doll.

John
Laurence wrote on 9/29/2011, 1:02 PM
Just to make sure that I am on the same page as everyone else: my assessment is that this is progressive footage flagged as interlaced. Is that correct?
amendegw wrote on 9/29/2011, 1:43 PM
"Just to make sure that I am on the same page as everyone else: my assessment is that this is progressive footage flagged as interlaced. Is that correct?"The source is true 1920x1080 60i (not PF30, as my Canon calls 30p embedded in 60i).

The original assignment was to take this ugly/nasty source and produce the best quality SD DVD render. Documented here: HD to SD Challenge The original procedure called for posting the results to YouTube, but we soon learned that the only valid comparison was at the interlaced .mpg level.

All that said, the original assignment may have (certainly has) morphed via various threads & tests in this forum.

...Jerry

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Laurence wrote on 9/29/2011, 9:46 PM
I can't see any interlaced comb in the original. It looks like progressive to me, regardless of what the flags and camera settings say. My latest version several posts back was done with no deinterlace method selected and as if it was progressive, and the fact that it looks as good as it does leads me to suspect that is not in fact interlaced. If it was, the way I did it would look horrible.
amendegw wrote on 9/30/2011, 5:55 AM
"I can't see any interlaced comb in the original. It looks like progressive to me, regardless of what the flags and camera settings say. My latest version several posts back was done with no deinterlace method selected and as if it was progressive, and the fact that it looks as good as it does leads me to suspect that is not in fact interlaced."Hmmm, just playing around a little this morning, here's the way I would test for PF30 vs 60i (you'll want to view the video at fullscreen 720p). It was quick-and-dirty. I got the SnagIt capture framesize wrong and forgot to capture the cursor movement, but I didn't want to re-do the capture.



...Jerry

System Model: Alienware Area-51m R2
System: Windows 11 Home
Processor: Intel(R) Core(TM) i7-10700K CPU @ 3.80GHz, 3792 Mhz, 8 Core(s), 16 Logical Processor(s)
Installed Memory: 64.0 GB
Display Adapter: NVIDIA GeForce RTX 2070 Super (8GB), Nvidia Studio Driver 527.56 Dec 2022)
Overclock Off

Display: 1920x1080 144 hertz
Storage (12TB Total):
OS Drive: PM981a NVMe SAMSUNG 2048GB
Data Drive1: Samsung SSD 970 EVO Plus 2TB
Data Drive2: Samsung SSD 870 QVO 8TB

USB: Thunderbolt 3 (USB Type-C) port Supports USB 3.2 Gen 2, DisplayPort 1.2, Thunderbolt 3

Cameras:
Canon R5
Canon R3
Sony A9

Laurence wrote on 9/30/2011, 7:16 AM
Fair enough, Yes it does look like 60i. What I used was the Boris BCC7 uprezzer but as a downrezzer. Not much good for downrezzing when you want to preserve the interlace however, extremely good if you don't mind losing the interlace.
johnmeyer wrote on 9/30/2011, 12:00 PM
I can't see any interlaced comb in the original. It looks like progressive to me ...I just downloaded the original source and tested. It is quite definitely interlaced NTSC (i.e., "60i") upper field first.
AlenK wrote on 10/10/2011, 1:37 PM
Hi Guys,

I've been following the discsussion here with great interest and I've gone back and read the previous "HD to SD challenge" thread. No doubt I will have some relevant questions to ask soon, but my first question is actually about this forum and one called "Sony Talk."

A portion of this thread, and all of the "HD to SD Challenge" thread, appear to be replicated in the Sony Talk forum but with bogus names and bogus dates. The dates are older than what I presume are the real dates here (e.g., the first post in this thread is dated April 8, 2011 here but is dated September 30, 2010 there).
http://www.sonytalk.com/aliasing-artifacts-and-moire-t84242.html

"Copy" of "HD to SD Challenge" thread on Sony Talk:
http://www.sonytalk.com/challenge-t16735.html

This is confusing. Is Sony Talk a real discussion forum? If so why are threads posted here replicated there with bogus names and dates?

Laurence wrote on 10/10/2011, 1:40 PM
I certainly look cuter on the other site as "Elena Alina"

john_dennis wrote on 10/10/2011, 2:09 PM
"Is Sony Talk a real discussion forum?"

No! Feel free to ignore it and come here. If you search, you'll find a discussion about this site in the last few months. The more you ignore it the better.

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PeterDuke wrote on 10/10/2011, 6:40 PM
"Elena Alina" sounds a bit like "Tina Arena".
AlenK wrote on 10/10/2011, 10:14 PM
Thanks for the explanation. Sorry to momentarily derail the thread. So they "steal" this forum's content to generate ad revenue and phish for personal information. And it's been going on for a while now. Wonderful.
musicvid10 wrote on 10/10/2011, 11:55 PM
"So they "steal" this forum's content to generate ad revenue and phish for personal information. And it's been going on for a while now. Wonderful."

Here's the earlier thread on these site-scrapers:
http://www.sonycreativesoftware.com/forums/ShowMessage.asp?ForumID=4&MessageID=769062