| CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/46 (2014.11)] | 10 Claims |
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1. An image decoding apparatus, comprising:
a memory: and
at least one processor connected to the memory, the at least one processor configured to:
obtain Most Probable Mode (MPM) index information and reference line index information from a bitstream;
construct a MPM list including candidate intra prediction modes for intra prediction of a current block;
derive an intra prediction mode for the current block among the candidate intra prediction modes included in the MPM list based on the MPM index information;
generate prediction samples for the current block based on the intra prediction mode; and
generate reconstructed samples for the current block based on the prediction samples,
wherein in the constructing of the MPM list, a DC mode is derived as one of the candidate intra prediction modes and included in the MPM list,
wherein the reference line index information is related to a value indicating a reference line used for intra prediction of the current block, and
wherein based on the value of the reference line index information being not equal to 0, a planar mode is not used as the intra prediction mode of the current block, the planar mode is not included in the MPM list, a number of candidate intra prediction modes in the MPM list is five, and the intra prediction mode of the current block is derived from the MPM list based on the MPM index information.
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