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by cycomanic
1771 days ago
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Just after he says: "4:2:0 is the most popular case. Four luma samples per one chroma" so he does understand and write what it means. That does not explain why the value is 4. I assume it is because with 4 you have 3 different subsampling ratios (if you want to keep factors of two, which you typically want to keep algorithms simple) |
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