Explain HDR Source Luminosity Differences - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 2 Old 03-17-2020, 06:46 AM - Thread Starter
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Question Explain HDR Source Luminosity Differences

So I am feeding my LS10500 (pixel shifter 8bit capable of max resolution HDR at 30fps) from:

A. Apple TV 4th gen. Here everything appears very dark and dim once HDR 24fps selected. 4kSDR looks very lively and well lit.

B. Sony X800. Here HDR 24p looks magnificent with medium lamp settings, great color separation and blacks,
in Passengers the robot bartender polishing a glass over a dark background as well as the space walks look awesome.
Other HDR titles fail to look dim.

To what do I owe the difference and what can I do to fix the Apple TV?

With anticipated thanks! I know I have been lurking here for decades but I am still an amateur and my brain is....

Furman IT-Reference 20i(amps/sub) & Elite-20PFi(low current) > Harmony-659 > Marantz-UD9004(bal.2+RCA7.1), Sony UBP-X800 & S5500RF(PAL), Apple-64GB, Dell Latitude 5490 w. W15 dock > Marantz-AV8805 & Classé-CP700(bypass) > Epson-LS10500/Carada1.4, Samsung QN32Q50RAFXZA secondary monitor > Classé CA-2200 & CA-5200, two Zamp v.3 > Paradigm S8v.2, C5, ADP3, S2, Servo15v2, CI Pro P-80A 7.4.1
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post #2 of 2 Old 03-26-2020, 07:45 AM
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Hdr content is mapped to say 1000-4000 nits and SDR is mapped to 50 nits.

Without some sort hdr mapping it the image will be dim looking as projectors setups for sdr are round 50 nits (16 foot lamberts).

Read your ls10500 manual I recall there is an static HDR tone mapper feature that will help adjust the hdr playback.
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Reply High Dynamic Range (HDR) & Wide Color Gamut (WCG)

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