| CPC H04N 19/60 (2014.11) [H04N 19/12 (2014.11); H04N 19/124 (2014.11); H04N 19/176 (2014.11); H04N 19/70 (2014.11); H04N 19/132 (2014.11); H04N 19/46 (2014.11)] | 11 Claims |
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1. An image decoding method performed by a decoding apparatus, the method comprising:
obtaining a transform skip enabled flag from a bitstream;
obtaining a dependent quantization enabled flag from the bitstream;
obtaining prediction related information for a current block from the bitstream;
deriving a prediction sample of the current block based on the prediction related information;
obtaining, based on a value of a transform skip residual coding (TSRC) disabled flag, residual information for the current block from the bitstream;
deriving a residual sample of the current block based on the residual information; and
generating a reconstructed picture based on the prediction sample and the residual sample,
wherein the transform skip enabled flag is information for whether transform skip is enabled,
wherein the dependent quantization enabled flag is information for whether dependent quantization is used,
wherein the TSRC disabled flag is information for whether TSRC is used,
wherein, in the case of i) the transform skip enabled flag indicating that the transform skip is enabled and ii) the dependent quantization enabled flag indicating that the dependent quantization is not used, the value of the TSRC disabled flag is obtained from the bitstream, and
wherein, in the case of i) the transform skip enabled flag indicating that the transform skip is enabled and ii) the dependent quantization enabled flag indicating that the dependent quantization is used, the value of the TSRC disabled flag is not obtained from the bitstream, the value of the TSRC disabled flag is inferred as 0, and the TSRC is used for a transform skip block.
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