| CPC H04N 19/137 (2014.11) [H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11)] | 3 Claims |
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1. A video decoding method comprising:
determining a center motion vector of a current block by using a base motion vector of the current block based on affine model-based inter-prediction being performed in the current block;
determining a reference range of an area to be referred to, with respect to the current block, based on a size of the current block;
based on a reference area having a size of the reference range with respect to a point in a reference picture of the current block, the point being indicated by a central motion vector of the current block, deviating from or including a boundary of the reference picture, changing the reference area by parallelly translating the reference area into a current picture;
determining prediction samples of sub-blocks of the current block based on the changed reference area from the reference picture; and
determining reconstruction samples of the current block by using the prediction samples of the current block.
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