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What is YUV 4:2:2 colorspace?

April 26, 2017colorspace

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What is YUV 4:2:2 colorspace?

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YUV colorspace is used by a wide range of professional video equipment like Betacam SP and DigiBeta and also in nearly all digital video codecs, including JPEG, DV, DivX, MPEG 1,2,4. These codecs are used for Video-DVDs, AVI and Quicktime movies and most hard disk recorders. • Y is the luminance (brightness) component • U+V are the chrominance (color) components 4:2:2 means that the luminance channel is stored in full resolution (full width and height of the image) and the U+V components are stored in half resolution (half width but full height of the image).This is done to save resources, because the human eye is much more sensitive to luminance than to chrominance (all cats are gray in the dark). BTW, 4:1:1 finally means that the UV components are stored in quarter resolution (half width and half height of the image).