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MPEGGroup / CMAF

Official MPEG repository to discuss public issues on CMAF (ISO/IEC 23000-19)
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HDR10H and HLG10H are mathematically impossible. #44

Open ZmGorynych opened 5 months ago

ZmGorynych commented 5 months ago

The HDR10H and HLG10H profiles are mathematically impossible.

HDR10 and HLG10 allow 4K and require Main/Main10/ L5.1. L5.1 is limited to 534773760 luma samples per second. For a 3840×2160 picture this translates into 64.47fps.

We need L5.2 or L6 to support 4K@120fps, and these levels exceed the requirements of the HDR10 and HLG10 profiles referenced by HDR10H and HLG10H.

haudiobe commented 2 months ago

I believe the idea was that you can do 120fps, but only at 1080p or 1440p. If you want to do 4K, you can do only 60 fps.