HDR Discussion Thread

[ray0414]

Originally Posted by batman2000

which is which?

Sorry, upper picture sdr, lower picture dolby vision. More blue in the sky and darker/richer greens in the trees.

[Penton-Man]

Originally Posted by PS3_Kiwi

I am an old prick with failing eyesight but, really.

Take a cue from these old timers who appreciate what’s most significant in life….

YOUTH - Official International Trailer #2 (2015) Michael Caine Movie HD - YouTube

[Penton-Man]

Originally Posted by Penton-Man

For those not qualified for access to reading the event presentations which are now online, Andy Q. (5 down -> https://tech.ebu.ch/events/hdr2016;j...D8F04FA8C4C244 ) revealed an HDR-tv tidbit which will become relevant shortly in the days to come.

Also, a tip of the hat again to neuroscientist (with training at the NIH ), Jenny (4 down on the list) for her presentation at the event.

the day is today, namely, the publication of BT. 2100…..
http://www.itu.int/net/pressoffice/p...x#.V3v7sfkrK1u

[Geoff D]

Fascinating stuff in BT.2100, I wish I understood most of it!! Though the bit about the OOTF intrigued me, how PQ considers the OOTF to already be part of the signal whereas HLG prioritises the application of the OOTF as part of the display chain (which is where it should be IMO).

[Penton-Man]

Blu-Dog, get your nose out of the freezer!….

UNE PETITE FAIM - PAROLE DE CHIEN - YouTube

And reflect back on a post I made to you from almost a year ago, in particular….

Originally Posted by Penton-Man

Heads-up, not EOTF nor OETF ( https://www.smpte.org/sites/default/...-2-handout.pdf ) but a new acronym in regards to HDR for Blu-Dog to learn, namely….OOTF, bookmark it as it should become important…..

For today you can read Annex 1 (Informative) on page 11 and learn …..
http://www.itu.int/rec/R-REC-BT.2100

P.S.
Geoff, all the recent francais YouTube talk is because I’m watching Le Tour de France this week as well as still trying to catch up with Euro 2016 given it’s the host nation for both.

[Penton-Man]

Originally Posted by Geoff D

Fascinating stuff in BT.2100, I wish I understood most of it!!...

Table 3, as mentioned earlier(before publication)…
https://forum.blu-ray.com/showthread...3#post12076407

is one of the easier tables to understand and helpful international consensus guidance to/for HDR content creators.

[Geoff D]

Originally Posted by Penton-Man

P.S.
Geoff, all the recent francais YouTube talk is because I’m watching Le Tour de France this week as well as still trying to catch up with Euro 2016 given it’s the host nation for both.

All that French stuff don't bother me none, monsieur!

As for OOTF, I remember asking you after that post as to what it meant - cue cryptic Penton response - and I finally found out myself a few weeks ago when searching for it on the internets. So that much of the BT.2100 recommendation I understood!

[Penton-Man]

Originally Posted by Geoff D

All that French stuff don't bother me none, monsieur!

Not sure if you can get this 60 Minutes Night at the Movies broadcast -> http://www.cbsnews.com/news/60-minut...at-the-movies/
in your neck of woods, but the cockney accent like that of Michael Caine doesn’t bother me none either.

Au contraire, among a host of other things, I embrace ethnicity, heritage and thought provoking science.

Originally Posted by Geoff D

As for OOTF, I remember asking you after that post as to what it meant - cue cryptic Penton response -.....

'The important thing in Life is not triumph, but the struggle’.
I’ve never been much for spoon feeding as I’ve found with regards to teaching advanced concepts that if you give away the answer too easily….then there is little or no self motivation by others for personal development. A tip of the hat to you for struggling with both the concepts of OOTF and Sony’s calibration patterns on the Ultra HD Blu-ray disc movies.

[Penton-Man]

Originally Posted by Penton-Man

A tip of the hat ...

Or, perhaps after last evening I should simply say ‘chapeau’.

[bruceames]

Originally Posted by ray0414

Sorry, upper picture sdr, lower picture dolby vision. More blue in the sky and darker/richer greens in the trees.

Yes, DV will look better on a display which falls far short of the UHD Premium specs. But I wouldn't put much stock into low bit rate streamed content even for that.

[Penton-Man]

Originally Posted by Penton-Man

now that ITU-R BT.2100-0 has been published ...

Onto a different organization for a moment. I have little regular liaison with the ATSC folks, anyone (Richard?) have any inside news about progress/results of their HDR study group calls from last month (June), for background see -> https://forum.blu-ray.com/showthread...c#post12326553

ATSC 3.0 has arguably a tough row to hoe, but it’s been in the JoeQ public news recently for general video matters…

GatesAir Helps WRAL-TV Broadcast the First ATSC 3.0 TV Station - YouTube

[Richard Paul]

Originally Posted by Penton-Man

the day is today, namely, the publication of BT. 2100…..
http://www.itu.int/net/pressoffice/p...x#.V3v7sfkrK1u

While the ITU document does a good job of explaining how to use PQ and HLG the part about 16-bit floating point data seems strange. They state that 16-bit floating point uses IEEE 754-2008 and with PQ 1.0 is equal to 1.0 nits while for HLG 1.0 is equal to the peak white. 16-bit floating point has a lot of precision between 0 and 1 but they could have used a higher value as the peak white. Is that a misprint or does 16-bit HLG really not use any of the values above 1?

[Penton-Man]

i dont see table 10--- normalization for HLG needing a revision. as far as I recall the only thing that was added in at the last itu meeting for clarification was some wordage in the paragraph right above that table – “currently. real-time……” in order to emphasize that point, namely that 48-bit/pixel real time pipelines dont exist now.

[PeterTHX]

Originally Posted by Penton-Man

Take a cue from these old timers who appreciate what’s most significant in life…

Imagery so sharp you can see the nipple scars from the implant procedure

[Jumpman]

As a novice, I guess my question about HDR is this...between UHD Blu with HDR and standard Blu, which image is inaccurate to the director's vision? Has standard Blu always been inaccurate?

[Geoff D]

[Jumpman]

Originally Posted by Geoff D

Sorry...I think?

[Geoff D]

Don't be sorry! I'm just not enough of a blowhard to even attempt to answer that question.

[Jumpman]

Originally Posted by Geoff D

Don't be sorry! I'm just not enough of a blowhard to even attempt to answer that question.

It's the only question that I could think of when it comes to this entire business of HDR and what it is, what it isn't, and if it's right or not.

[Geoff D]

It sounds like you keep thinking I'm attacking you, I'm not. The question is a perfectly valid one and it's been at the heart of most discussions in these 4K threads for years already, so pretty much everyone's said their piece and drawn a line in the sand as to what side they come down on in the great HDR debate. If you don't get an answer right now then stick around, keep visiting this thread and others and you'll get several viewpoints in due course.