HDR Discussion Thread

[Penton-Man]

https://forum.blu-ray.com/showthread...n#post15508703
since then ^ , 3 weekly updates -> https://www.rtings.com/tv/learn/real...d-burn-in-test

with an op-ed by Display Daily - https://www.displaydaily.com/article...urn-in-problem

[Penton-Man]

https://forum.blu-ray.com/showthread...s#post15513258
^ On a pro level, and for JVC aficionados, affordable 10-bit panels with 14-bit color processing - https://www.broadcastbeat.com/nab-ne...ve-production/

[Deciazulado]

Good to see things moving in that direction.

[Penton-Man]

Still nobody yet know/recognize Maverick’s patch as seen in the ABC National News broadcast from last week - https://forum.blu-ray.com/showthread...h#post15620014 ?

o.k. then, here’s a hint on the locale, from conversation back in the day about an altogether different actor and movie - https://forum.blu-ray.com/showthread...st#post5039056

P.S.
Don’t assume that all filming locations for Top Gun: Maverick have been restricted to Coronado and NAS Lemoore.

[Waboman]

Originally Posted by Penton-Man

*Waboman would be happy as a polar bar.

The ol' polar bar did not abide.

[DanBa]

"Announced in September, Microsoft has now publicly released the update that adds Dolby Vision support for streaming apps on Xbox One. However, at this time, Dolby Vision is only supported for Netflix.
It should be stressed that this new "low latency profile" is not compatible with all Dolby Vision TVs. LG’s 2016 TVs as well as Vizio TVs are notably missing from the list of supported devices. Microsoft claims that Dolby is getting ”working with TV OEMs to update TVs currently in market”."
https://www.flatpanelshd.com/news.ph...&id=1539730922

I can’t find a Dolby document mentioning this low latency profile.

Without the information on the low latency profile, it is my understanding that there are two main versions of Dolby Vision:
. Dolby Vision before the introduction of the MEL (Minimal Enhancement Layer)
. Dolby Vision with MEL



Goal of MEL: "The MEL can be used to minimize the processing requirements for the enhancement layer and thus ensure broader use among UltraHD (Blu-ray) SoCs."
https://www.dolby.com/us/en/technolo...les-levels.pdf

A double layer Dolby Vision video stream is composed of a base layer video stream and an enhancement layer video stream.

The full enhancement layer (FEL) is a HEVC video stream with embedded Dolby Vision metadata: it requires a SoC to be capable of simultaneously decoding two video streams (base layer video stream and FEL video stream).

The minimal enhancement layer MEL, a constrained FEL, only consists of metadata: it requires a SoC to be capable of only decoding one single base layer video stream.




https://www.dolby.com/us/en/technolo...les-levels.pdf

Possible cases with new Dolby Vision certified video files & devices compliant with the latest Dolby Vision version: (decoding in a streaming device is more explicit than in a TV)

"A profile 4 bitstream with a MEL is a constrained version of the original profile 4 bitstream. It produces a high dynamic range Dolby Vision video signal on both older and new Dolby Vision certified devices." [Dolby]

Dolby Vision profile 4 with MEL video file stored on a streaming server >> Internet >> streaming device > 10-bit Dolby Vision with MEL video signal >> HDMI >> Dolby Vision with FEL-compliant TV

"A new Dolby Vision certified device is able to decode a profile 4 MEL bitstream without instantiating a secondary HEVC decoder for the enhancement layer." [Dolby]
(it can do more, i.e. double decoding; it can do less, i.e. single decoding)

Dolby Vision profile 4 with MEL video file stored on a streaming server >> Internet >> streaming device > 10-bit Dolby Vision with MEL video signal >> HDMI >> Dolby Vision with MEL-compliant TV


Possible cases with original video files / original Dolby Vision-compliant TV:

original Dolby Vision profile 4 video file stored on a (Netflix) streaming server >> Internet >> original streaming device > original 12-bit Dolby Vision video signal >> HDMI >> original Dolby Vision-compliant TV

"If a Dolby Vision playback device supports Dolby Vision profile 4 and chooses not to instantiate a second HEVC decoder, then it must check for these values in the reference processing unit of a Dolby Vision bitstream. If the values are not exactly as shown for all three channels, the device must flag the bitstream as a Dolby Vision original profile 4 bitstream; otherwise, flag the bitstream as profile 4 minimum enhancement layer." [Dolby]

original Dolby Vision profile 4 video file stored on a streaming server >> Internet >> streaming device able to convert original FEL to MEL > 10-bit Dolby Vision with MEL video signal >> HDMI >> Dolby Vision with MEL-compliant TV

"An original profile 4 bitstream with a full enhancement layer distributed after December 31, 2017, may not produce the high dynamic range Dolby Vision video signal on all Dolby Vision devices." [Dolby]

"A new Dolby Vision device that chooses not to instantiate a second HEVC decoder and supports profile 4 must distinguish the original profile 4 bitstream from the profile 4 MEL bitstream. When receiving an original profile 4 bitstream, such a device:
• Exits the Dolby Vision video pipeline
• Uses its normal video pipeline for video processing, and displays a standard dynamic range video signal only
• Does not display the Dolby Vision logo." [Dolby]

original Dolby Vision profile 4 video file stored on a streaming server >> Internet >> original streaming device > original 12-bit Dolby Vision video signal >> HDMI >> interoperability issue >> Dolby Vision with MEL-compliant TV

original Dolby Vision profile 4 video file stored on a streaming server >> Internet >> streaming device able to convert original FEL to MEL > 10-bit Dolby Vision with MEL video signal >> HDMI >> interoperability issue >> original Dolby Vision-compliant TV

Dolby Vision profile 4 with MEL video file stored on a streaming server >> Internet >> streaming device > 10-bit Dolby Vision with MEL video signal >> HDMI >> interoperability issue >> original Dolby Vision-compliant TV


Original Dolby Vision-compliant TV: 2016 LG OLED TV, Vizio TV, ... (for the time being not yet updated)
(New certified) Dolby Vision with FEL-compliant TV: 2017/2018 LG OLED TV, ...
(New certified) Dolby Vision with MEL-compliant TV: Sony TV
https://www.dolby.com/us/en/categori...compatible.pdf

Original Dolby Vision-compliant TVs are capable of simultaneously decoding two video streams like the Dolby Vision with FEL-compliant TVs.
They can be more or less easy to be updated to be compliant with the latest Dolby Vision version: they can do more, i.e. double decoding; they can also do less, i.e. single decoding.
https://twitter.com/xQuatroK/status/1051972830651445254
https://twitter.com/VIZIO/status/1051962330475634690

[Geoff D]

Simple answer: it's the Sony profile, which also doesn't work on 2016 OLEDs.

[nick4Knight]

Just gimme some piece of mind that none of these compatibility issues crop up on the 2018 LG OLED models, C8 on up?

[alexanderg823]

Originally Posted by Geoff D

Dey in for a looong wait by the looks of it

San Diego sunset is definitely worth waiting for.

[avs commenter]

But doesn't the Sony profile for the X700 UHD player work on all TV's?

[Geoff D]

Originally Posted by avs commenter

But doesn't the Sony profile for the X700 UHD player work on all TV's?

The player can do both profiles, but not all TVs can. The DV Sonys can't do the full-fat version, LG's 2016 sets can't do the low-latency profile. Doesn't matter when you've got a player that can do both...but the Xbox can't do both, which is the point.

[BrownianMotion]

Originally Posted by Geoff D

Simple answer: it's the Sony profile, which also doesn't work on 2016 OLEDs.

It's similar to the Sony profile in that they're both low latency, but Microsoft stated that this is a profile that they specifically created with Dolby. As far as I know, Microsoft had no involvement with the Sony profile that was initially deployed to Sony TVs.

[BrownianMotion]

Originally Posted by nick4Knight

Just gimme some piece of mind that none of these compatibility issues crop up on the 2018 LG OLED models, C8 on up?

You shouldn't have any issues. I downloaded the Dolby Vision firmware for my Xbox One X this week and it works well on my B7.

[PeterTHX]

It works on my Sony Z9D.

Right now it's only Netflix, no Vudu or Amazon support yet.

[Penton-Man]

Originally Posted by Waboman

The ol' polar bar did not abide.

[Show spoiler]

, you're catching on as to what could be the pastime behind those wooden walls

Originally Posted by Geoff D

I'm no cinematographer so I'm wondering

Not sure what’s in here - https://www.kodak.com/corp/podcast/p...tid=4295010656
with regards to - https://www.imdb.com/title/tt6628394...ef_=tt_dt_spec

but may be an interesting listen for those stuck in traffic on the way to wherever or waiting at your local DMV to renew your driver’s license and ultimately then sit in said traffic. Bike.

[Penton-Man]

Originally Posted by Penton-Man

Still nobody yet know/recognize Maverick’s patch as seen in the ABC National News broadcast from last week - https://forum.blu-ray.com/showthread...h#post15620014 ?

o.k. then, here’s a hint on the locale, from conversation back in the day about an altogether different actor and movie - https://forum.blu-ray.com/showthread...st#post5039056

P.S.
Don’t assume that all filming locations for Top Gun: Maverick have been restricted to Coronado and NAS Lemoore.

the significance?
the patch would provide a little history as to where Maverick’s been since Miramar, and it hasn’t been doing this out of the Far East –

https://vimeo.com/64333578

P.S.
I realize that with all this Top Gun: Maverick conversation we’re a couple years ahead of social media and websites, be they movie or technically related, but that’s not that uncommon for the HDR Discussion Thread as we have a history of leading far ahead of the pack with lots of things, including HDR geeky, to list only a few, for there are many more items I could cite -

https://forum.blu-ray.com/showthread...r#post13324408
https://forum.blu-ray.com/showthread...ar#post9754213

Stay tuned.

[Penton-Man]

Originally Posted by DanBa

"Announced in September, Microsoft has now publicly released the update that adds Dolby Vision support for streaming apps on Xbox One.....

I’m not curious as to what’s in any of these devices as you never know what you’ll find…..

Viral Video of Snake Found in Computer CPU - YouTube

I’ll leave that sort of tinkering up to guys like LordoftheRings and JohnAV.

[Penton-Man]

Originally Posted by Penton-Man

Stay tuned.

because unlike others, we have proven past history of unfettered access to the most cutting edge proposals and decisions from the ITU, e.g. – https://forum.blu-ray.com/showthread...ry#post7361160

as well as from SMPTE study groups, for example - https://forum.blu-ray.com/showthread...g#post14203568
and have shared with our readers various tidbits of HDR/WCG developments from along the way (before publication) and will continue to do so when at liberty, without revealing too much –



These things ^ form the basis or DNA of consumers’ devices and the importance of the work in these various groups can not be overstated, thusly they are presented here for insight.

[Penton-Man]

Originally Posted by alexanderg823

San Diego sunset is definitely worth waiting for.

and then back to the airstrip again for yet another take as the sun was setting further down....

Originally Posted by Penton-Man

[Staying Salty]

Originally Posted by mithras1

HDTV Polska A9F review: https://translate.google.com/transla...-text=&act=url

The description of the experiences from using the "Netflix calibration mode" will be the shortest description you can imagine: this is simply the Dolby Vision mode. Dark Room with a different name! Best of all, we can (and should) introduce calibration settings dedicated for Dolby Vision to the calibration mode of the Netflix application.