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Do All 4K Discs Support High Dynamic Range (HDR)?

Posted on by Bob Ankosko
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Q I own a Sony UBP-X800 Ultra HD Blu-ray player and want to know if all the 4K discs I buy provide high dynamic range (HDR). I’m also wondering if all 4K discs with HDR deliver it in both the HDR10 and Dolby Vision formats. —Steven Ganno, via email