All 4K UHD Blu-ray players have built-in 10-bit per color graphics capability for playing back 4K UHD Blu-ray movies-all of which are stored in 10-bits per color HEVC format video. Using the ProjectorCentral 10 Bit-HDR Grayscale Animationįortunately, there is a simple way for any serious video enthusiast to download and view 10-bit test patterns to help assess their display. Otherwise, you'll wind up viewing a smooth 8-bit target or movie that shows no difference when viewed on an 8- or 10-bit display. Even if you can actually find true 10-bit files available for download, you'll still need a computer with a 10-bit graphics card and 10-bit capable software. MP4, are limited to 8-bits per color content. It's even harder to find animated 10-bit test targets and videos, as nearly all popular video formats available for download, including AVCHD and. Most are not what they claim! Unless you can download the test patterns as intact 16-bit TIFF format photos (all JPEGs are limited to 8-bits per color), you should quit while you're ahead. For starters, that would require a true 10-bit illustration (our illustrations are capped at 8-bits per color thanks to web color limitations).įigure 2: Comparison of bit-depth gradations (note: illustration limited to 8-bits due to web limitations)įurthermore, you shouldn't be misled by the test patterns and even some movies available for download from the internet that claim to be 10-bit targets or 10-bit per color movies. For now, just have a look at the grayscale values we'll discuss color later.įigure 1: Bit-Depth Gray Tone and Color ValuesĪs seen in the illustration below (Figure 2), once an 8-bit grayscale or full color scale is achieved, you won't see the incremental benefits of 10-bits per color on your computer monitor or tablet, and probably not even on a true 10-bit display or projector driven by your computer or other internet-connected device. The chart below (Figure 1) shows you the results of the math for both grayscale only or RGB color. For the grayscale calculation it's: 2 x = number of gray values. All you need to do is apply the log function formula. Its numeric bit depth rating ("x"-bits per color) can be used to quickly calculate the projector's entire range of unique gray scale values, from its deepest black to its brightest white. ![]() How do you translate a projector's bit depth rating into the number of colors it can reproduce? Let's first take the example of a monochrome projector that forms a single grayscale image on the screen. The improvements are relatively easy to see as you increase bit depth from 1-bit to 8-bit per color, less intense between 8- and 10-bits, and difficult or impossible to notice between 10-, 11-, and 12-bits due to the limitations of the human eye. As the bit depth rating increases (to a point, anyway), the number of colors and tonal values a projector can reproduce on screen increases exponentially, resulting in fewer jagged transitions and posterization effects (i.e., smoother blue skies), along with wider color gamuts and improved shadow and highlight details. Theoretically, a projector's bit-depth rating describes the highest number of tonal values and colors that it can reproduce in any given frame of content. What Is Bit Depth and Why Does It Matter? In fact, it may actually tell you more about a projector's potential image quality than its contrast, pixel resolution, or even color accuracy ratings-all of which can be varied based on display modes or focusing accuracy. ![]() However, bit depth is becoming an increasingly important metric for comparing projectors that claim the ability to reproduce wide color gamut (WCG) and high dynamic range (HDR) content. Color bit-depth is often hidden on the specs page or described in some obscure way. Ok, so you might have a hard time finding that last one. Either way, you're going to encounter a variety of technical terms used to describe the potential image quality, including its ANSI Lumens, white light output, pixel resolution, contrast, color accuracy, and color bit-depth. When shopping for a new display or projector, how do you determine which model has the best image quality, or even just the best quality for your limited budget? Unless you can compare two models in a side-by-side shootout, you'll have to base your purchase on trusted product reviews from sites such as this one, or the manufacturer's ads and brochures.
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