![]() This requires much more data, and like ultra high-definition video, current optical media can’t handle it. Vivid objects aren’t simply saturated more shades of colors can be seen. Bright shots aren’t simply sunny, vivid pictures fine details in the brightest surfaces remain clear. Deep shadows aren’t simply black voids more details can be seen in the darkness, while the picture stays very dark. Similarly, they can produce deeper and more vivid reds, greens, and blues, and show more shades in between. To put it more simply, HDR content on HDR-compatible TVs can get brighter and darker at the same time, and show more shades of gray in between. This means that very bright objects and very dark objects on the same screen can be shown very bright and very dark if the display supports it, with all of the necessary steps in between described in the signal and not synthesized by the image processor. Besides the wider range, HDR video simply contains more data to describe more steps in between the extremes. HDR-capable displays can read that information and show an image built from a wider gamut of color and brightness. It removes the limitations presented by older video signals and provides information about brightness and color across a much wider range. Only so much information is presented in the signal, and a TV capable of reaching beyond those limits still has to stretch and work with the information present. They can reach further extremes, but video formats can’t take advantage of it. Now, with organic LED (OLED) and local dimming LED backlighting systems on newer LCD panels, that range is increasing. Black is set to only so black, because as Christopher Guest eloquently wrote, “it could get none more black.” Similarly, white could only get so bright within the limitations of display technology. Whether a panel can reach 100 cd/m2(relatively dim) or 500 cd/m2(incredibly bright), and whether its black levels are 0.1 (washed out, nearly gray) or 0.005 (incredibly dark), it can ultimately only show so much information based on the signal it’s receiving.Ĭurrent popular video formats, including broadcast television and Blu-ray discs, are limited by standards built around the physical boundaries presented by older technologies. However, just expanding the range between bright and dark is insufficient to improve a picture’s detail. Essentially, dynamic range is display contrast, and HDR represents broadening that contrast. ![]() Dynamic range describes the extremes in that difference, and how much detail can be shown in between. TV contrast is the difference between how dark and bright it can get. It’s impressive to see on TVs that can handle it, but it’s also a fairly esoteric and technical feature with some variations that can lead to confusion. It can push video content past the (now nonexistent) limitations to which broadcast and other media standards have adhered to for decades. High dynamic range (HDR) video is currently one of the biggest TV feature bullet points. Move over, 4K: HDR can vastly improve what you watch.
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