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Added 4:2:2 color subsampling schema #28

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Jun 6, 2017
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Added 4:2:2 color subsampling schema #28

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Added 4:2:2 color subsampling schema 
4:2:2 is one of the most commonly used subsampling schemas (among 4:4:4 and 4:2:0) and should be part of the listing here.
Also perhaps sorting the 4:4:4, 4:2:2 and 4:2:0 to the beginning of the listing would be a neat idea.
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@baxerus
baxerus authored Jun 6, 2017
commit 76270e11a3a157c6eaa343ee2de0725aa9d5a0ab
2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -220,7 +220,7 @@ Once we are able to separate luma from chroma, we can take advantage of the huma

How much should we reduce the chroma resolution?! It turns out that there are already some schemas that describe how to handle resolution and the merge (`final color = Y + Cb + Cr`).

These schemas are known as subsampling systems (or ratios), they are identified by the numbers: **4:4:4, 4:2:3, 4:2:1, 4:1:1, 4:2:0, 4:1:0 and 3:1:1**. And each one of them defines how much should we discard in the chroma resolution as well as how we should merge the three planes (Y, Cb, Cr).
These schemas are known as subsampling systems (or ratios), they are identified by the numbers: **4:4:4, 4:2:3, 4:2:2, 4:2:1, 4:1:1, 4:2:0, 4:1:0 and 3:1:1**. And each one of them defines how much should we discard in the chroma resolution as well as how we should merge the three planes (Y, Cb, Cr).

> **YCbCr 4:2:0 merge**
>
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