While on typical TV set sized the benefit from 4k resolution are not apparent at all, on bigger screen sizes it is really easy to tell the difference.
Depending on the viewing distance, UHD resolution on projectors provides a great benefit to the viewer with a crisper and more defined image.
HDR is the acronym for High Dynamic Range.
HDR (High Dynamic Range), as its name implies, is a method that aims to add more "dynamic range" to static and moving images, where dynamic range is the ratio of light to dark in an image
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