Dolby has relaxed that requirement, and some TVs, including Sony TVs, do this via software instead. With HDR10 and HDR10+, tone mapping is entirely the manufacturer's choice, which can lead to inconsistency. *With Dolby Vision, the first devices that supported Dolby Vision needed a proprietary Dolby chip that checks the TV's model and applies tone mapping using the TV's limitations as a reference. While this is inevitable, a tone-mapped picture shows a lot more detail in the highlights than one which is clipped.
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This would mean that some highlights on a TV that uses tone mapping would appear slightly dimmer than if the same TV used clipping. In practice, this means that there is some gentle roll off of color in the highlights starting around 1000 cd/m2. On a 1400 cd/m2 TV, the highlights from 1400 to 4000 are remapped to fall below 1400 cd/m2. Thankfully, most decent TVs don't use this method anymore. This is simply because the TV cannot reproduce details in areas this bright as it is above its maximum output. What does this mean? It means that there would be no detail seen in that range of brightness and there would be no discernible colors in this region.
In our example of a 1400 cd/m2 TV, everything from 1400 to 4000 would be clipped. If you have a TV with a maximum brightness of 1400 cd/m², how does it deal with highlights on a film that was mastered at 4000 cd/m²? It is crucial how TVs with a relatively low peak brightness deals with a film that has been mastered at much higher peak brightness.
Winner: Dolby Vision, technically. Even though Dolby Vision supports 12-bit color, there are almost no devices out there that can take advantage of it. This allows for much finer control over gradations, resulting in a more life-like image, with no banding. This might not sound like a big difference, but 10-bit color equals 1.07 Billion colors, whereas 12 bit increases that to an impressive 68.7 Billion colors. The more colors you can display, the more realistic the image appears, with less banding and a more subtle transition in areas of similar color. For more information, have a look at our article on gradients.ĭolby Vision content allows for up to 12-bit color HDR10 and HDR10+ are only 10 bit. HDR content is usually mastered at 10 bit, which allows for up to 1.07 billion colors. SDR content is typically mastered at 8-bit, which allows for 16.7 million colors. Bit depth describes the amount of graduations of colors in an image.