Differences

This shows you the differences between two versions of the page.

--- hdr_uhd_signalling [2016/11/21 14:46] – [HDR HLG10 (SDR in VUI)] walkeradmin
+++ hdr_uhd_signalling [2023/03/09 22:35] (current) – external edit 127.0.0.1
@@ Line 42: / Line 42: @@
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-This only works with HLG HDR streams, PQ10 does not work the same (HLG has built in backwards compatibility).
+This only works with HLG HDR streams, PQ10 does not work the same. HLG has built in backwards compatibility that relies on the HDR information being at the end of the transform where SDR TVs will ignore it. PQ10 (Dolby Vision) has a dual layer approach for backwards compatibility. There is an SDR stream with supplemental information that a HDR decoder combines with the SDR to create HDR outputs. This dual layer approach adds 20%-30% overhead. PQ10 also has a single layer approach for HDR, but with no backwards compatibility.
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