HDR: Projector Compatibilty Issues
Match Specifications to Determine HDR Compatibility
It is possible to research specs and try to make sure the source device and projector match in order to determine compatibility. Most buyers won't want to do this. The easiest way to deal with this will be to ask a professional authorized reseller for the latest info. They are likely to have the most updated information about specific compatibility for either the devices above, new source players that will be coming onto the market in the future, or compatibility with streaming sources.
If you want to attempt it yourself and the combination of projector and video source you're considering isn't on the previous page, you can still tell whether they should work together for 4K HDR--or 4K SDR--by looking at the specifications for each. First, for HDR to work, they both have to be HDR10 compatible. Beyond that, they need to both support the same chroma subsampling levels at the frame rate and resolution you need.
The resolution in this case is 4K. The two frame rates that matter are 24p, for UHD Blu-ray discs, and 60p, if you're interested in 4K HDR games.
The color depth can be 8-bit, 10-bit, or 12-bit, with 10-bit the only choice that's actually defined by HDR10.
You don't need to know what the subsampling levels mean. Just note that the choices are identified as 4:4:4, 4:2:2, and 4:2:0. You need at least one of those supported by both products at the resolution (4K), frame rate (24p, 60p, or both), and color depth (10- or 12-bit for HDR) that you plan to use.
One thing to watch out for: The ability to support any combination of resolution, frame rate, color depth, and chroma subsampling level is basically a bandwidth issue, with higher levels of each adding more bits of data that requires more powerful chipsets that can handle the additional workload. So you would expect a projector that can handle a high bandwidth combination would also be able to handle any combination that's less demanding. However that's not necessarily true. Make sure that both the projector and potential video source specifically say they support HDR with at least one combination that matches.
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