Why is 2160p video called 4K?
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4K resolution is the horizontal display resolution of 4,000 pixels. This means that the display has four times the number of pixels as a standard 1080p display. There are a couple of types of 4K resolution that we refer to. These are The Digital Cinema Initiatives Standard which is 4096×2160 pixels. The other option is the standard 4K resolution for TVs and monitors that you’ll usually find in your home, which is 3840×2160 pixels.
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