| CPC H04N 19/517 (2014.11) [H04N 19/46 (2014.11); H04N 19/463 (2014.11); H04N 19/523 (2014.11); H04N 19/91 (2014.11)] | 4 Claims |
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1. A video encoding method for encoding a motion vector by using an adaptive motion vector resolution in the unit of blocks which are split from a picture to be encoded, the method comprising:
determining a current motion vector of a current block to be encoded among the blocks split from the picture; and
encoding, into a bitstream, a differential motion vector and motion vector resolution identification information which are dedicated to the current block, wherein the motion vector resolution identification information is used for determining a motion vector resolution of the differential motion vector among a plurality of motion vector resolutions,
wherein the encoding of the differential motion vector comprises:
deriving at least one predicted motion vector candidate from motion vectors of one or more neighboring blocks of the current block;
converting the predicted motion vector candidate such that the converted predicted motion vector candidate has the same motion vector resolution as the motion vector resolution determined by the motion vector resolution identification information;
deriving a predicted motion vector for the current motion vector from the converted predicted motion vector candidate; and
generating the differential motion vector by subtracting the predicted motion vector from the current motion vector.
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