FIELD: video encoding.
SUBSTANCE: first flag is obtained from the encoded video bitstream indicating that resampling of the reference image is enabled for the encoded video sequence (CVS). The value of the second flag indicating whether the image resolution is changed in the CVS is determined. Based on the value of the second flag indicating that the image resolution is changed in the CVS, the CVS is decoded using reference image resampling for spatial scalability and adaptive resolution resampling (ARC). Based on the value of the second flag indicating that the image resolution is not changed in the CVS, the CVS is decoded using reference picture resampling for spatial scalability and without using reference picture resampling for ARC. Based on the value of the second flag indicating that the image resolution is not changed in CVS, a fifth flag included in the image parameter set referencing the SPS indicates that the image resolution is not changed in CVS.
EFFECT: increase of efficiency of image encoding.
15 cl, 34 dwg, 1 tbl
