Videographica: Chroma Formats

These are two diagrams from the book MPEG Video Compression Standard, page 176, illustrating 4:2:0 luma/chroma coding.

simple 4:2:0 frame diagram
Figure 9.1: Luminance and chrominance samples in a 4:2:0 frame.
4:2:0 interlacing diagram
Figure 9.2: Luminance and chrominance samples in an interlaced 4:2:0 frame.
Independent of whether the top or the bottom field is coded first, the chroma
is associated with the top field.
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