| CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/137 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11)] | 3 Claims |
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1. A decoding apparatus for image decoding, the decoding apparatus comprising:
a memory; and
at least one processor connected to the memory, the at least one processor configured to:
obtain information on transform coefficients from a bitstream;
derive a reference subblock on a collocated reference picture for a current subblock within a current block;
derive a motion vector of the reference subblock;
derive a subblock temporal motion vector predictor (sbTMVP) candidate based on the motion vector of the reference subblock;
generate prediction samples based on a motion vector of the current subblock derived based on the sbTMVP candidate;
generate residual samples for the current block based on the information on the transform coefficients;
generate a reconstructed picture based on the prediction samples and the residual samples; and
apply a deblocking filtering on the reconstructed picture,
wherein the reference subblock on the collocated reference picture is derived based on a position of a center lower-right sample among four samples positioned at a center of the current subblock,
wherein for the reference subblock that is not available, the motion vector of the reference subblock is set as a base motion vector, and
wherein the base motion vector is derived on the collocated reference picture based on a position of a center lower-right sample among four samples located at a center of the current block.
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