HDR10+ is free .
It's not completely free. You have to pay a small annual fee. But no comparison to the fees at Dolby.
HDR10+ Technologies, LLC announced the start of the new licensing and logo certification program for HDR10+ technology. HDR10+ is
the royalty-free, open standard dynamic metadata platform for High Dynamic Range (HDR), which optimizes picture quality for 4K Ultra HD displays and improves the viewing experience for all audiences.
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