HDR Discussion Thread

[DanBa]

[Dolby Vision] "Dynamic metadata allows creators to fine-tune the picture while performing HDR color correction":
https://www.newsdirectory3.com/bilib...eo_definition/

. Display perception and Color Appearance Model
https://www.avsforum.com/threads/uni...#post-50666105



Hunt effect (one of many color appearance phenomena) & consequent color correction:

"To illustrate the Hunt effect, Poynton suggested we think of the color of flowers in sunlight, then think of the color of those same flowers at twilight. The color of the flowers has not changed, but our perception of the colorfulness of them has – they don’t look as colorful in dim light.
His point: "If you capture the flowers in daylight and show on a display with only 300 nits of brightness, the flowers will look like they are captured at twilight."
Since displays cannot show the full dynamic range of the natural world, we have to apply "artistic intent" to alter the image to produce what is desired. In other words, if you want the flowers rendered at 300 nits to have the visual colorfulness that they did in sunlight, you have to add more color. It is not accurate, but it conveys the artistic intent."




. Metadata & HDR formats: different metadata, different rendering color perception
.. PQ HDR
PQ10 = PQ
HDR10 = PQ + static metadata
HDR10+ = PQ + HDR10+ dynamic metadata
PQ based Dolby Vision 2.9 = PQ + Dolby Vision 2.9 dynamic metadata
PQ based Dolby Vision 4.0 = PQ + Dolby Vision 4.0 dynamic metadata

.. HLG HDR
HLG10 = HLG
Dolby Vision profile 8.4 = HLG + Dolby Vision dynamic metadata


. Dolby Vision dynamic metadata & Hunt effect :



. Master HDR video graded with a 4000-nit Dolby Pulsar reference monitor
. Metadata for 1000-nit client monitor: color of flowers more saturated
. Metadata for 300-nit client monitor: color of flowers more more saturated

[Penton-Man]

August 23rd, 3 years ago -
https://forum.blu-ray.com/showthread...e#post15543102

and when in town try -
https://www.restaurantji.com/ca/lemo...nd-juice-bar-/


which offers some fine coffee; however, just don’t expect it served in this –

Originally Posted by Penton-Man

This coffee mug is not for sale commercially as it was produced for Top Gun: Maverick cast, crew and friends –

[Penton-Man]

Originally Posted by DanBa

Hunt effect

more flash back - i
n the development of the nuances of HDR, its bias had to be removed as a factor:
https://forum.blu-ray.com/showthread...t#post13205705

now, we've come full circle with regards to its utilization for content creation, as Charles indicates

[Penton-Man]

Originally Posted by DDH

VVC

Tuesday tidbits-
JVET-T0O97 (http://phenix.it-sudparis.eu/jvet/) showed good SDR UHD results
HDR verification testing (which is systematic subjective testing to verify the performance of a standard) is still ongoing

On a less technical note, looking forward to - https://cinemacon.com/schedule/#horizontalTab4

[Penton-Man]

not to worry ^ Chris, the forecast for Thursday in Vegas is a tad cooler than 112 degrees - https://podcasts.apple.com/us/podcas...=1000528279550

b.t.w. folks, although as noted in the pop-up ad, Tom (who is certified to fly other aircraft) was not allowed to pilot the F/A-18 Super Hornet (and actually sat in the back seat of the F/A-18F), others around did so –

[Penton-Man]

Throwback Thursday - https://forum.blu-ray.com/showthread...r#post18816890

[Penton-Man]

Originally Posted by Penton-Man

https://cinemacon.com/schedule/#horizontalTab4

in regards to what was revealed to the attendees here ^ , without spoiling for readers here too much of a subplot, think along the lines of - https://forum.blu-ray.com/showthread...t#post16682369 and being a maverick.

Shown also, a location used for one scene – https://forum.blu-ray.com/showthread...y#post15747395 which, b.t.w., also was used back in the day for this commercial that aired during the 1992 Super Bowl (won by the team from PaulGo’s neck of the woods, if memory serves) –

Cindy Crawford - Pepsi Ad - YouTube

[LordoftheRings]

Originally Posted by Penton-Man

folks, check out Sweet Girl, which, after the stage is set, becomes a rather robust action film. Finished by Walter.

Ok, we'll do ... very soon ... time permitting. It's in HDR too.
And that main actor (Aquarian...oops...Aquaman), he's a charismatic guy, a good guy in real-life.

[puddy77]

Originally Posted by puddy77

Years overdue, Hulu quietly added HDR support this weekend: https://help.hulu.com/s/article/video-quality

And of course, none of my devices support it.

According to Salty on AVS, Hulu is using DV profile 8 for its HDR streams, which I guess is a first: https://www.avsforum.com/threads/mas.../post-60979703

I assume that's why all devices that are getting it right now are only displaying the HDR10 or 10+ layer. Hopefully apps and/or devices get updated soon with DV 8 compatibility.

[Geoff D]

Originally Posted by DanBa

[Dolby Vision] "Dynamic metadata allows creators to fine-tune the picture while performing HDR color correction":
https://www.newsdirectory3.com/bilib...eo_definition/

Prolly just a garbled translation but dynamic metadata is not about "performing HDR colour correction". All such grading/colour correction is done to the HDR master before it enters the DV mastering stage. The latter is about deriving a suite of metadata that allows for better translation of the intended image at a variety of trim passes, and not altering the source material itself. In the Dolby best practice thingy they noted that the two recommended trims are 100 nit SDR and 600 nit HDR as the latter is where most displays - and I think they're referring to OLED here - can comfortably render HDR.

[Kris Deering]

Originally Posted by Penton-Man

not to worry ^ Chris, the forecast for Thursday in Vegas is a tad cooler than 112 degrees - https://podcasts.apple.com/us/podcas...=1000528279550

b.t.w. folks, although as noted in the pop-up ad, Tom (who is certified to fly other aircraft) was not allowed to pilot the F/A-18 Super Hornet (and actually sat in the back seat of the F/A-18F), others around did so –

I thought you had mentioned way back when the first trailer launched that Tom actually did fly for a lot of the sequences we see, it just wasn't an actual Super Hornet but a different variation. So does that mean he never flies the 18 in any of the movie clips we see?

[Penton-Man]

Friday flashback -
Scroll down to The unfiltered, in-depth interview with Kenny Loggins to hear about the song Danger Zone and personal hopes for the upcoming Top Gun: Maverick, timestamp 23:40 - https://spectrumnews1.com/ca/la-west...sts_po-organic

[Penton-Man]

Originally Posted by LordoftheRings

Ok, we'll do ... very soon ... time permitting. It's in HDR too.
And that main actor (Aquarian...oops...Aquaman), he's a charismatic guy, a good guy in real-life.

Rachel (Isabela Merced) is more than easy on the eyes too.

[Penton-Man]

Originally Posted by Geoff D

metadata

Dolby Vision with its dynamic tone mapping provides more benefits to picture quality (admitted by the authors of this paper, both of whom b.t.w. were involved in the standard for UHD Blu-ray back in the day); that said, in regards to static metadata (HDR10), there’s this recent paper and their perspective - https://ieeexplore.ieee.org/document/9508136

[Penton-Man]

Originally Posted by Kris Deering

I thought you had mentioned way back when the first trailer launched that Tom actually did fly for a lot of the sequences we see, it just wasn't an actual Super Hornet but a different variation. So does that mean he never flies the 18 in any of the movie clips we see?

Maybe I wasn’t clear before, or else having a few of these at the time trying to keep up with Waboman –



Tom flies (in) an actual F/A 18-F like a naval flight officer (i.e. a weapons systems officer) -

F-18 Super Hornet Virtual Tour - YouTube

in other words, he hasn’t been inserted in one vis-à-vis CGI for Top Gun: Maverick, but he doesn’t pilot or drive it as is done by the aviator in the front seat. Firstly, although, Tom has flight time training in other jets (https://forum.blu-ray.com/showthread...e#post16463278), ultimately I don’t think he had what the NAVY considered as the required advanced pilot training in order to actually drive an F/A 18.

Additionally, I think there may be a Department of Defense directive restricting civilians (exception being certified test pilots with secret clearance) from piloting NAVY, Air Force, etc., militarized aircraft. Heck, civilians are restricted from even buying militarized aircraft, afaik. And by militarized, I don’t necessarily mean armed, but equipped with any type of system which has national security classifications or ITAR restrictions associated with them of which I assume both the F/A 18-Fs and Es used for the film had installed at the time.

As an aside, a parameter of which all studios involved in theatrical distribution pay close attention to (and was on the minds of many at CinemaCon) is Comfort in going to the movies - https://morningconsult.com/return-to-entertainment/ and as of last Sunday, only 45% of all adults. Hoping this trends up by November.

P.S.
Is your Reavon player review forthcoming?

[puddy77]

Originally Posted by puddy77

According to Salty on AVS, Hulu is using DV profile 8 for its HDR streams, which I guess is a first: https://www.avsforum.com/threads/mas.../post-60979703

I assume that's why all devices that are getting it right now are only displaying the HDR10 or 10+ layer. Hopefully apps and/or devices get updated soon with DV 8 compatibility.

The Fire Stick 4K is now doing Hulu DV. So it seems that Amazon Prime, Paramount+, and now Hulu are all capable of doing the three major HDR formats of HDR10, HDR10+, and Dolby Vision.

[Penton-Man]

From the product manager of among other things, the FS-HDR
https://vimeo.com/589446183

and a roundtable consisting of Bill and other expert panelists –

https://vimeo.com/589422277

[Penton-Man]

Originally Posted by Penton-Man

From the product manager of among other things, the FS-HDR
https://vimeo.com/589446183

Public Service Announcement about comfortably aiding one of the parts of the Human Visual System (your eyeballs, of which Tim ^ begins his HDR presentation and briefly discusses ) -

For those who just can’t tolerate traditional contact lenses and who would prefer vision correction without glasses, check out scleral lenses (they don’t irritate your cornea as do other contacts because they don’t sit on your cornea). Consult with a qualified practitioner having a fellowship with the Scleral Lens Society such as, for SoCal locals, Thanh Mai and who practices in Costa Mesa at Insight Vision Center and is an upcoming speaker in November for this lecture series - https://www.eye.uci.edu/lectures/316...ure_Series.pdf

[Penton-Man]

Originally Posted by Steedeel

Iceman!

https://www.indiewire.com/2021/08/to...rn-1234660731/
b.t.w., there is a real naval aviator (who is a member of one of the strike fighter squadrons that took part in Top Gun: Maverick) and who has that call sign. His actual helmet -

[Steedeel]

Originally Posted by Penton-Man

https://www.indiewire.com/2021/08/to...rn-1234660731/
b.t.w., there is a real naval aviator (who is a member of one of the strike fighter squadrons that took part in Top Gun: Maverick) and who has that call sign. His actual helmet -

Good stuff. Looking forward to this in 4K!