HDR Discussion Thread

[alexanderg823]

Originally Posted by DanBa

"A 3D ‘pixel to pixel’ Mura correction is performed at factory on production line using Sharp’s ‘UCCT’ software (Uniform Color Calibration Technology). Using the very accurate L*ab methodology, all chromatic, luminance and hue values are calculated to remove any Mura impurity from the entire display screen area achieving a consistent uniformity of the white point and of all colors across each display from screen edge to center, and between all displays across the entire video wall.
This advanced Mura correction process is eventually saved onto a unique combination of separate Look Up Tables (LUT) on board every PN-V551 display, (i.e. known as “hardware calibration”), permanently saving and applying all correction data to obtain a consistent and uniform color rendering across each display from screen edge to center, and between all displays across the entire video wall, regardless to any input signal the display is fed from."

It's difficult to understand what this means for LCD in practice.

LCD's big unformity issues stem from physical issues such as FALD backlighting grids showing through diffusers and also through physical changes to the panel itself causing clouding/banding/DSE. These can be incurred merely through the handling or maintenance of the television during unboxing or even cleaning of the screen with a microfiber cloth.

The wording like that seems rather limited in scope compared to the vast amount of issues surrounding LCD uniformity problems.

[Penton-Man]

Originally Posted by Waboman

Well, as you know I'm but a humble lad. And I wouldn't feel comfortable taking food out of ...... mouths.

You forget Glen…..https://www.hollywoodreporter.com/he...sequel-1131037

[Penton-Man]

The head and shoulders pic from THR ^ above, reminds me.
At the last ITU meeting, a considerable amount of discussion among working participants was about whether or not/then how to amend some of the specifics related to skin tone and related reference value of the video signal level in what is the guide for operational practices in HDR TV production –
https://www.itu.int/pub/R-REP-BT.2408-1-2018 <- see p.3-4 and the Annexes at the end of the pdf document.

There will be changes.

[LordoftheRings]

Originally Posted by Penton-Man

a cooler time and place just a tad east of there ^ - https://www.drumhellermail.com/news/...d-near-hoodoos

the film's title was changed from The Solutrean to this

Looks like a boring place, like the Nevada desert.

Alaska would be best in the summertime.

[DisplayCalNoob]

Originally Posted by Geoff D

By "scaling" he just means "mapping", you're reading too much into it. Of course HDR10 can be "scaled", the problem, as ever, is that there's not a single formula or method for this process that the display manufacturers are using.

Isn't that how the manufacturers want it?

[Penton-Man]

Originally Posted by LordoftheRings

Looks like a boring place, like the Nevada desert.
Alaska would be best in the sumnertime.

Well I guess it’s not as vibrant as Vancouver - https://www.imdb.com/title/tt4244998...?ref_=tt_dt_dt ; nevertheless, Drumhellerites please direct any of your complaint PMs to LordoftheRings,

not me.

[Penton-Man]

Originally Posted by Penton-Man

The head and shoulders pic from THR ^ above, reminds me.
At the last ITU meeting, a considerable amount of discussion among working participants was about whether or not/then how to amend some of the specifics related to skin tone and related reference value of the video signal level in what is the guide for operational practices in HDR TV production –
https://www.itu.int/pub/R-REP-BT.2408-1-2018 <- see p.3-4 and the Annexes at the end of the pdf document.

There will be changes.

And the accurate rendition of diverse skin tones is important, e.g. people devote whole shoots to the concept…..https://forum.blu-ray.com/showthread...o#post14989206

[Penton-Man]

Given the discussion of audio and the Sony A9F OLED TV, make note that researchers are working on thru the screen audio concept for theatrical-sized screens….http://www.hani.co.kr/arti/society/area/853785.html

[LordoftheRings]

Originally Posted by Penton-Man

Well I guess it’s not as vibrant as Vancouver - https://www.imdb.com/title/tt4244998...?ref_=tt_dt_dt ; nevertheless, Drumhellerites please direct any of your complaint PMs to LordoftheRings,

not me.

My business office is close for the summer.
Ya shall be back in the cooler months.

[Penton-Man]

Originally Posted by Deciazulado

Thanks, Penton.

paper now publicly accessible….https://achapiro.github.io/Cha18a/Cha18a.pdf

also, words of the day for around the water cooler when some reviewers are considering doing side-by-side display comparisons - ‘Cornsweet illusion’ - https://en.wikipedia.org/wiki/Cornsweet_illusion

[Penton-Man]

Originally Posted by LordoftheRings

My business office is close for the summer.....

If you're bored, across the waterway from you - https://s2018.siggraph.org/,
exhibits only pass $50.

[gkolb]

Brightness -

Couple of scenes in The Matrix made me squint, when Neo and Trinity were gearing up to save Morpheus. Ooh that was white on my 65 Z9D!

[Kris Deering]

Originally Posted by Penton-Man

paper now publicly accessible….https://achapiro.github.io/Cha18a/Cha18a.pdf

also, words of the day for around the water cooler when some reviewers are considering doing side-by-side display comparisons - ‘Cornsweet illusion’ - https://en.wikipedia.org/wiki/Cornsweet_illusion

Interesting paper. I was anxious to read as I have been struggling with trying to figure out the same issue when emulating a flat panel with a projection system for tone mapping. I emailed the author earlier to try and discuss some of my findings.

Also, in the wiki for "Cornsweet Illusion" it shows that our eyes are tricked by the luminance at the split, but in a side by side display comparison, there wouldn't be a luminance split between the two, it would be a physical one.

I like side by side comparisons for some things because it does a better job of showing issues that may not be seen in single display viewing, our eyes are amazing at optical comparison. But you have to keep in mind that our eyes and brain are VERY adaptive as well, so without a side by side comparison (which is not how we typically watch content casually) there are things you probably wouldn't have even noticed.

I did something similar with a projector comparison once. Had someone bring over there very $$$ projector which I calibrated and we looked at some content. He thought the contrast and black levels in a star field sequence looked incredible. I then started doing split screen comparisons with another projector with much higher native contrast that was brightness matched. The image from his now looked very gray and washed out. He immediately thought I had changed the settings but I showed him that nothing had changed at all, it was simply a matter of seeing something with much higher contrast at the same time gives you a more dramatic effect. He couldn't believe how bad it made his look.

[Penton-Man]

Originally Posted by Kris Deering

...But you have to keep in mind that our eyes and brain are VERY adaptive as well,

Indeed, which is why some post houses have regularly scheduled recalibrations of their displays rather than relying on for when colorists or mastering techs perceive something as being ‘off’ because as discussed back in 2015…..

Originally Posted by Penton-Man

because viewers’ eyes adapt to almost anything over the course of time….with many of them not even being aware of the out of tolerance changes.

[Penton-Man]

One would assume the ‘Netflix calibrated mode’

Sony – BRAVIA – MASTER Series Netflix Calibrated Mode - YouTube

of the Sony Bravia Master Series Z9F and A9F presupposes that the consumer is viewing Netflix content in a Netflix recommended viewing environment (Surround light level: 5 nits) –
https://partnerhelp.netflixstudios.c...ng-Environment

no?

*b.t.w. for non-SMPTE membership who desire to avoid the fee to read the entire standard, to be nit-pickin precise, SMPTE ST 2080-3:2017 says “D65 ambient light level in the monitor environment surround shall have a luminance of 5.0 +/- 0.5 candellas per square meter” (nits)

[LordoftheRings]

Some good documentary stuff on Netflix.

[Penton-Man]

Originally Posted by LordoftheRings

good documentary stuff

speaking of which, heads-up to those so inclined – https://forum.blu-ray.com/showthread...t#post15386213

[Kris Deering]

Originally Posted by Penton-Man

One would assume the ‘Netflix calibrated mode’

Sony – BRAVIA – MASTER Series Netflix Calibrated Mode - YouTube

of the Sony Bravia Master Series Z9F and A9F presupposes that the consumer is viewing Netflix content in a Netflix recommended viewing environment (Surround light level: 5 nits) –
https://partnerhelp.netflixstudios.c...ng-Environment

no?

*b.t.w. for non-SMPTE membership who desire to avoid the fee to read the entire standard, to be nit-pickin precise, SMPTE ST 2080-3:2017 says “D65 ambient light level in the monitor environment surround shall have a luminance of 5.0 +/- 0.5 candellas per square meter” (nits)

Funny that you mention ambient light. I remember years ago going round and round with Stacey Spears about calibration and such. He can be dogmatic about it to say the least. But I brought up the fact that no one I know, including him, where adhering to the same ambient light standard that is part of that. Most don't because they're in a dark room and ambient light can hurt image contrast, but if you're gonna be a stickler for the rules, you can't really pick and choose!!

[Penton-Man]

Originally Posted by Kris Deering

our eyes and brain

SMPTE likes its biology too, the 2018 Journal Award Paper winner…. https://ieeexplore.ieee.org/stamp/st...number=7935134

[Penton-Man]

Originally Posted by Penton-Man

speaking of which, heads-up to those so inclined – https://forum.blu-ray.com/showthread...t#post15386213

And continuing on a bit with the theme ^ of the more esoteric category of short films which we seldom talk about here (and since this article about short videos was in the LA Times yesterday - http://www.latimes.com/business/holl...807-story.html)

Megan is to get a Dolby Vision deliverable…http://www.vfxexpress.com/megan-shor...vfx-breakdown/