| CPC H04N 19/105 (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 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:
receive prediction related information and residual information from a bitstream;
determine that an intra prediction is applied for a current block based on the prediction related information;
construct a Most Probable Mode (MPM) list including intra prediction mode candidates for the current block based on neighboring blocks of the current block;
decode remaining mode information indicating one of remaining intra prediction modes not included in the MPM list from the bitstream;
derive an intra prediction mode of the current block based on the remaining mode information;
generate prediction samples for the current block based on the intra prediction mode;
derive transform coefficients based on the residual information;
generate residual samples for the current block based on the transform coefficients; and
generate reconstructed samples for the current block based on the prediction samples for the current block and the residual samples for the current block,
wherein the neighboring blocks of the current block include a left neighboring block and an upper neighboring block,
wherein the remaining mode information is decoded based on a truncated binary code,
wherein a number of bits of the truncated binary code for first intra prediction modes of the remaining intra prediction modes is k, and a number of bits of the truncated binary code for second intra prediction modes excepting the first intra prediction modes among the remaining intra prediction modes is k+1,
wherein a number of the first intra prediction modes is L, and
wherein a following equation is applied between the k and u,
k=floor (log 2u)
wherein the u represents a total number of the remaining intra prediction modes.
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