Originally Posted by morphinapg
HDR10+ isn't the same thing as Dolby Vision. Dolby Vision isn't just the dynamic metadata, it's got an incredibly smart tonemapping system that takes into account both your TV's capabilities, and the capabilities of the mastering display before designing a curve that does its best job reproducing what the colorist saw on their mastering display as closely as possible, and does this every scene. HDR10+ doesn't really do anything like that. It changes tonemapping every scene, but relies on some pretty basic tonemapping curves built into the TV.
Yes indeed. But it's very difficult to explain the nuances of that to most people. Even among my peers who know what HDR is (a tiny number of people), they think HDR10+ is basically like Dolby Vision.
For anyone to understand your paragraph above, they need to understand what tone-mapping is. I've pointed people in the past to Vincent's excellent video comparing tone-mapping approaches on 3 TVs, which is probably the most easy to understand explanation of what tone-mapping is on YouTube. But it's not a short video! Just like Vincent explains that you have to choose between preserving highlight detail or peak brightness, so equally you can either explain Dolby Vision properly taking a long time, or improperly and miss out crucial details. Sadly the former bores my friends to tears, that may say something about me but I think it also means that Joe Public may never really believe that HDR10+ isn't in the same league as Dolby Vision. It's too complicated
ps. I'd also add the ICtCp colour space. I know some users have pointed out that a 4K version of a movie at 4:2:0 YCrCb will be better than the HD version and contain more colour information. A little bit like seeing the colour information at HD 4:4:4.
So you could say that the 4:2:0 ICtCp is better than 4:2:0 YCrCb because it contains less chroma cross-talk in the chroma sub-sampling etc. Try explaining THAT to a bunch of people who don't really care