| ### Section 17: Motion Vector Decoding {#h-17-00} | |
| As discussed above, motion vectors appear in two places in the VP8 | |
| datastream: applied to whole macroblocks in `NEWMV` mode and applied to | |
| subsets of macroblocks in `NEW4x4` mode. The format of the vectors | |
| is identical in both cases. | |
| Each vector has two pieces: a vertical component (row) followed by a | |
| horizontal component (column). The row and column use separate | |
| coding probabilities but are otherwise represented identically. | |