Literally, what does YUV420 mean?


We know what YUV420 is, but literally what does the 0 mean?

In short, 0 means 0 uv values are sampled in the second row.

Details:

4: for each 4 pixels in each row

2: 2 uv samples on first row.

0: 0 rv samples on second row: reusing uv samples on first row.

Therefore, for YUV422, second 2 means second row is sampled the same way as the first row.

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