| Clock | Block | Size |
| 1 | 0 | 4 × 4 |
| 2 | 1 | 4 × 4 |
| 3 | 0, 1 | 4 × 8 | 2 | 4 × 4 |
| 4 | 3 | 4 × 4 |
| 5 | 2, 3 | 4 × 8 | 4 | 4 × 4 |
| 6 | 0, 4 | 8 × 4 | 5 | 4 × 4 |
| 7 | 6 | 4 × 4 | 1, 5 | 8 × 4 | 4, 5 | 4 × 8 | 0, 1, 4, 5 | 8 × 8 |
| 8 | 7 | 4 × 4 | 2, 6 | 8 × 4 |
| 9 | 8 | 4 × 4 | 3, 7 | 8 × 4 | 6, 7 | 8 × 4 | 2, 3, 6, 7 | 8 × 8 | 0, 1, 2, 3, 4, 5, 6, 7 | 8 × 16 |
| 10 | 9 | 4 × 4 |
| 11 | 10 | 4 × 4 | 8, 9 | 4 × 8 |
| 12 | 11 | 4 × 4 |
| 13 | 12 | 4 × 4 | 10, 11 | 4 × 8 |
| 14 | 13 | 4 × 4 | 8, 12 | 8 × 4 |
| 15 | 14 | 4 × 4 | 9, 13 | 8 × 4 | 12, 13 | 4 × 8 | 8, 9, 12, 13 | 8 × 8 | 0, 1, 4, 5, 8, 9, 12, 13 | 16 × 8 |
| 16 | 15 | 4 × 4 | 10, 14 | 8 × 4 |
| 17 | 11, 15 | 8 × 4 | 14, 15 | 4 × 8 | 10, 11, 14, 15 | 8 × 8 | 8, 9, 10, 11, 12, 13, 14, 15 | 8 × 16 | 2, 3, 6, 7, 10, 11, 14, 15 | 16 × 8 | Full macroblock | 16 × 16 |
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