CalMan 5 Release Notes and Discussion - Page 226 - AVS Forum | Home Theater Discussions And Reviews
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post #6751 of 6789 Old 06-24-2019, 05:32 PM
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Hi Guys, is it necessary to do another meter profile for hdr or i can use the one i did for sdr?

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post #6752 of 6789 Old 06-24-2019, 05:32 PM
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Quote:
Originally Posted by Rolls-Royce View Post
I don't think you could say lowering the backlight is really a "bad" thing, but IMHO, if your display's tone mapping does allow it to resolve highlights at higher luminances, you'd want those highlights to be as bright as possible.
If HDR10 is constrained to 1000 nits max, and the point of calibration is to get as close as possible to the standard, why should I make the highlights brighter than intended? If I were viewing HDR10+ content that actually exceeded 1000 nits, lowering the backlight wouldn't be desirable. But at least right now, such content is basically non-existent as far as my viewing is concerned.
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post #6753 of 6789 Old 06-24-2019, 06:15 PM
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Quote:
Originally Posted by thoth View Post
If HDR10 is constrained to 1000 nits max, and the point of calibration is to get as close as possible to the standard, why should I make the highlights brighter than intended? If I were viewing HDR10+ content that actually exceeded 1000 nits, lowering the backlight wouldn't be desirable. But at least right now, such content is basically non-existent as far as my viewing is concerned.
But it isn't constrained to 1000 nits. Metadata basically tells the viewing display the capabilities of the mastering display and certain other values the content was mastered with. It doesn't act to throttle the TV's output. Some TVs have even ignored or not used certain of the parameters included in HDR metadata. Ted Aspiotis is more knowledgeable about this, but it came up several months ago when the metadata strings recommended for output by the HDFury Integral when calibrating HDR-10 were found to include the wrong hex code in a certain spot. It turned out that some popular TVs ignored that code, but a newer model did not and it caused problems.

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post #6754 of 6789 Old 06-24-2019, 06:20 PM
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Quote:
Originally Posted by Rolls-Royce View Post
But it isn't constrained to 1000 nits.
Oh, HDR10 content isn't constrained to use codes <= ~769?
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post #6755 of 6789 Old 06-24-2019, 06:24 PM
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Quote:
Originally Posted by thoth View Post
Oh, HDR10 content isn't constrained to use codes <= ~769?
Not as far as I'm aware. Where did you read that it was?

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post #6756 of 6789 Old 06-24-2019, 06:26 PM
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Quote:
Originally Posted by Toto84 View Post
Hi Guys, is it necessary to do another meter profile for hdr or i can use the one i did for sdr?

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You use the same meter profile for both.

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post #6757 of 6789 Old 06-24-2019, 06:36 PM
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Originally Posted by Rolls-Royce View Post
Not as far as I'm aware. Where did you read that it was?
I haven't, I made an inference from various sources saying HDR10 tops out at 1000 nits.
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post #6758 of 6789 Old 06-24-2019, 06:45 PM
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Quote:
Originally Posted by thoth View Post
I haven't, I made an inference from various sources saying HDR10 tops out at 1000 nits.
Earlier generations of HDR sets couldn't hit 1000 nits, let alone 10,000. My KS8000 from 2016, for instance, struggles to get much above 750. It was common then to see 1000 nits as a sort of threshold, I think. But newer displays are closing in on 2K nits, so that's probably outdated.
Another issue plaguing the earlier HDR displays was the fact that not only could they not get to 1000 nits, they ran below the ST2084 target luminance line for much of the climb up to their max output. What does yours do? If lowering the backlight means you drop below the target line, you shouldn't do it because you're sacrificing brightness at the lower levels as well as in the highlights.

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post #6759 of 6789 Old 06-24-2019, 06:54 PM
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Originally Posted by Rolls-Royce View Post
But newer displays are closing in on 2K nits, so that's probably outdated.
Hmm, I thought DV and HDR10+ were defined, in part (only in part), to get beyond the 1000 nit limitation of HDR10. I'd be very interested to see something that shows HDR10 content can exceed 1000 nits.
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post #6760 of 6789 Old 06-24-2019, 07:21 PM
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Originally Posted by thoth View Post
Hmm, I thought DV and HDR10+ were defined, in part (only in part), to get beyond the 1000 nit limitation of HDR10. I'd be very interested to see something that shows HDR10 content can exceed 1000 nits.
https://www.digitaltrends.com/home-t...hat-is-hdr-tv/
https://vsbytes.com/hdr-dolby-vision-hdr10-hlg/
https://hometheaterreview.com/dolby-...-need-to-know/

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post #6761 of 6789 Old 06-24-2019, 07:37 PM
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OK, thanks, I guess the sources I looked at were wrong, or were talking about what HDR10 content is typically mastered to.
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post #6762 of 6789 Old 06-24-2019, 08:11 PM
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Quote:
Originally Posted by thoth View Post
OK, thanks, I guess the sources I looked at were wrong, or were talking about what HDR10 content is typically mastered to.
No worries. I personally don't look at HDR10 as limited because at its heart it specifies the same ST.2084 PQ luminance scale as DV regardless of the target luminance levels it's mastered to.

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post #6763 of 6789 Old 06-25-2019, 06:42 AM
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Quote:
Originally Posted by Rolls-Royce View Post
No worries. I personally don't look at HDR10 as limited because at its heart it specifies the same ST.2084 PQ luminance scale as DV regardless of the target luminance levels it's mastered to.
Nearly all HDR10 is mastered at 1000-1200nits while almost all Dolby Vision is mastered at 4knits. Consumer TVs are pushing 2-3000nit output and that number will likely push well over 4000nits in the next few years based on the rate we are seeing now. Also the good possibility of true 12bit consumer panels.

Once these things happen there will likely be a visible difference between HDR10 and Dolby Vision based on the content that has already been mastered. This may cause a significant sway in the format war.
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post #6764 of 6789 Old 06-25-2019, 10:08 AM
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post #6765 of 6789 Old 06-25-2019, 10:42 AM - Thread Starter
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Originally Posted by skschatzman View Post
Nearly all HDR10 is mastered at 1000-1200nits while almost all Dolby Vision is mastered at 4knits. Consumer TVs are pushing 2-3000nit output and that number will likely push well over 4000nits in the next few years based on the rate we are seeing now. Also the good possibility of true 12bit consumer panels.

Once these things happen there will likely be a visible difference between HDR10 and Dolby Vision based on the content that has already been mastered. This may cause a significant sway in the format war.
Almost all the Disney/Pixar UHD BD discs are 4000 nit HDR10. As it seems they are only doing DV on streaming platforms for most titles.
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post #6766 of 6789 Old 06-25-2019, 10:45 AM - Thread Starter
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Quote:
Originally Posted by thoth View Post
Hmm, I thought DV and HDR10+ were defined, in part (only in part), to get beyond the 1000 nit limitation of HDR10. I'd be very interested to see something that shows HDR10 content can exceed 1000 nits.
HDR10 as a format supports up to 10,000 nits just like DV and HDR10+. Stacey Spears's new UHD HDR Benchmark disc has 10,000 nit HDR demo content that you can watch in DV/HDR10+/HDR10 to compare them to each other.

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post #6767 of 6789 Old 06-25-2019, 02:48 PM
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HDR10 as a format supports up to 10,000 nits just like DV and HDR10+. Stacey Spears's new UHD HDR Benchmark disc has 10,000 nit HDR demo content that you can watch in DV/HDR10+/HDR10 to compare them to each other.
It appears it's not quite available yet but coming soon ...
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Finally my calibration work beautifully

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So which 1931 CIE setting did you use in the end?
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post #6769 of 6789 Old 06-26-2019, 09:40 AM
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So which 1931 CIE setting did you use in the end?
Hi mate, deitp for everything.

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post #6770 of 6789 Old 06-26-2019, 09:50 AM
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Hi mate, deitp for everything.

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Thanks. I have no clue what the difference is etc so more googling on its way. Unless someone is kind enough to explain here.
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This error keep coming back at the end ot the dolby vision config.
What is it ?

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post #6772 of 6789 Old 06-26-2019, 04:12 PM - Thread Starter
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Originally Posted by Toto84 View Post
This error keep coming back at the end ot the dolby vision config.
What is it ?

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When does this pop up? after you click a specific button? Is the TV in Dolby Vision mode by playing the Dolby Vision video file?

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post #6773 of 6789 Old 06-26-2019, 05:22 PM
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Originally Posted by WiFi-Spy View Post
HDR10 as a format supports up to 10,000 nits just like DV and HDR10+. Stacey Spears's new UHD HDR Benchmark disc has 10,000 nit HDR demo content that you can watch in DV/HDR10+/HDR10 to compare them to each other.
Now available in Amazon Marketplace - ordered a copy.
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Now available in Amazon Marketplace - ordered a copy.
Awesome disc

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post #6775 of 6789 Old 06-27-2019, 03:13 AM
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Originally Posted by WiFi-Spy View Post
When does this pop up? after you click a specific button? Is the TV in Dolby Vision mode by playing the Dolby Vision video file?
Hi Tyler after calibration this morning it seems to be working with no error.
I did get the error during the dolby vision config when mesuring black.

I do find dolby vision cinema very dark after calibration but this is my personnal opinion.



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post #6776 of 6789 Old 06-27-2019, 05:52 AM
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Awesome disc

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post #6777 of 6789 Old 06-28-2019, 09:10 AM
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HDR10 as a format supports up to 10,000 nits just like DV and HDR10+.
It's strange that so many sites get this wrong. I looked at the CTA document store, and couldn't find a document for HDR10. I sent CTA an inquiry: crickets. Best I could find was this, where they say:

"Note: HDR10 Media Profile is defined as:
EOTF: SMPTE ST 2084
Color Sub-sampling: 4:2:0 (For compressed video sources)
Bit Depth: 10 bit
Color Primaries: ITU-R BT.2020
Metadata: SMPTE ST 2086, MaxFALL, MaxCLL"

I guess that's all there is to it.
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post #6778 of 6789 Old 07-06-2019, 05:02 AM
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spectrophotometer color match

What is the best spectrophotometer color matching function to use in calman. I'm using latest calman and i1 display pro and default functioin of 1931cie
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post #6779 of 6789 Old 07-06-2019, 06:51 AM
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What is the best spectrophotometer color matching function to use in calman. I'm using latest calman and i1 display pro and default functioin of 1931cie
IIRC, that really is for when you are using a spectro. If not, you don't need to worry about it.

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post #6780 of 6789 Old 07-06-2019, 08:44 AM
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I am unable to get client 3 to activate with calman home for sony. I'm trying to connect it as the source display? I want to calibrate my monitor, but can't since I can't get client 3 to activate. I sent an email, but have received a response back yet.
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