ples in a frame Figure 6-2 - Nominal vertical and horizontal sampling locations of 4:2:0 samples in top and bottom fields Figure 6-3 - Nominal vertical and horizontal locations of 4:2:2 luma and chroma samples in a frame Figure 6-4 - Nominal vertical and horizontal sampling locations of 4:2:2 samples top and bottom fields Figure 6-5 - Nominal vertical and horizontal locations of 4:4:4 luma and chroma samples in a frame Figure 6-6 - Nominal vertical and horizontal sampling locations of 4:4:4 samples top and bottom fields Figure 6-7 - A picture with 11 by 9 macroblocks that is partitioned into two slices Figure 6-8 - Partitioning of the decoded frame into macroblock pairs Figure 6-9 - Macroblock partitions, sub-macroblock partitions, macroblock partition scans, and sub-macroblock partition scans Figure 6-10 - Scan for 4x4 luma blocks Figure 6-11 - Scan for 8x8 luma blocks Figure 6-12 - Neighbouring macroblocks for a given macroblock Figure 6-13 - Neighbouring macroblocks for a given macroblock in MBAFF frames Figure 6-14 - Determination of the neighbouring macroblock, blocks, and partitions (informative) Figure 7-1 - Structure of an access unit not containing any NAL units with nal_unit_type equal to 0, 7, 8, or in the range of 12 to 18, inclusive, or in the range of 20 to 31, inclusive Figure 8-1 - Intra_4x4 prediction mode directions (informative) Figure 8-2 - Example for temporal direct-mode motion vector inference (informative) Figure 8-3 - Directional segmentation prediction (informative) Figure 8-4 - Integer samples (shaded blocks with upper-case letters) and fractional sample positions (un-shaded blocks with lower-case letters) for quarter sample luma interpolation Figure 8-5 - Fractional sample position dependent variables in chroma interpolation and surrounding integer position samples A, B, C, and D Figure 8-6 - Assignment of the indices of dcY to luma4x4BlkIdx Figure 8-7 - Assignment of the indices of dcC to chroma4x4Blkldx: (a) ChromaArrayType equal to 1, (b) ChromaArrayType equal to 2 Figure 8-8 - 4x4 