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This page describes how color space, chroma subsampling, bit depth, and video compression relate to 4K video output. It also outlines best practices for encoding 4K video.
Background
Color Space
Each frame in a digital video, like a digital image, is made up of numerous individual pixels. To encode, store, and transmit these pixels, we represent them as numerical values. For digital video, there are two popular systems for representing a pixel as a numerical value:
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H.264: 4:2:0 subsampling with 8 bits of depth (Main Profile and High Profile)–at up to 1920x1080x60p
H.265: 4:2:0 subsampling with 8 bits (Main Profile) or 10 bits (Main 10 Profile) of depth–at up to 3840x2160x60p
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NoteMain 10 is the maximum video quality offered by the H.265 version 1 codec. |
JPEG: 4:4:4 subsampling with 8 bits of depth–at up to 1920x1080
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