| CPC H04N 19/82 (2014.11) [H04N 19/117 (2014.11); H04N 19/12 (2014.11); H04N 19/124 (2014.11); H04N 19/132 (2014.11); H04N 19/167 (2014.11); H04N 19/172 (2014.11); H04N 19/176 (2014.11); H04N 19/18 (2014.11); H04N 19/1883 (2014.11); H04N 19/463 (2014.11); H04N 19/60 (2014.11)] | 15 Claims |
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1. An image decoding method performed by a decoding apparatus, the method comprising:
obtaining image information including residual information through a bitstream;
deriving quantized transform coefficients based on the residual information;
deriving transform coefficients based on a dequantization process for the quantized transform coefficients;
deriving residual samples based on an inverse transform process for the transform coefficients;
generating reconstructed samples of a current picture based on the residual samples; and
generating modified reconstructed samples based on an in-loop filtering process for the reconstructed samples of the current picture, wherein it is determined whether the in-loop filtering process is performed across virtual boundaries,
wherein the image information includes a sequence parameter set (SPS),
wherein whether the SPS includes information on a number of the virtual boundaries is determined based on whether the SPS includes subpicture-related information,
wherein the subpicture-related information comprises information on position of at least one subpicture based on a plurality of subpictures being present in the current picture, and
wherein the information on position of the subpicture is determined as a predetermined value based on one subpicture being present in the current picture.
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