| CPC H04N 19/61 (2014.11) [H04N 19/11 (2014.11); H04N 19/12 (2014.11); H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/172 (2014.11); H04N 19/176 (2014.11); H04N 19/70 (2014.11)] | 10 Claims |
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1. An image decoding method performed by a decoding apparatus, the method comprising:
constructing a most probable mode (MPM) list of a current block based on intra prediction modes of neighboring blocks;
deriving, based on the MPM list and an MPM index, an intra prediction mode of the current block, the MPM index specifying one of a plurality of MPM candidates included in the MPM list;
generating a prediction sample of the current block based on the derived intra prediction mode;
deriving a residual sample of the current block based on a first flag indicating whether residual information of the current block is obtained from a transform skip residual coding syntax, wherein the first flag is obtained based on both i) a second flag indicating whether a transform skip is enabled and ii) a third flag indicating whether dependent quantization is used; and
generating a reconstructed picture based on the prediction sample and the residual sample,
wherein the MPM index is obtained from a bitstream in response to a fourth flag representing that the intra prediction mode of the current block is not derived using a Planar mode,
wherein based on the current block being a transform skip block and a value of the first flag being equal to 1, the residual information is obtained from a residual coding syntax, and
wherein based on the current block being the transform skip block and the value of the first flag being equal to 0, the residual information is obtained from the transform skip residual coding syntax.
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