FIELD: video encoding and decoding.
SUBSTANCE: invention is related specifically to signalling the size of an image or portions of an image that may vary from image to image. Method for decoding an encoded video bitstream is proposed, which includes: obtaining the first flag indicating whether a constant image size is used in an encoded video sequence including the current image; based on the first flag indicating that a constant image size is used, decoding the current image without performing reference image resampling; based on the first flag indicating that a constant image size is not used, obtaining a second flag indicating whether the match window size is signalled; based on the second flag indicating that the match window size is signalled, obtaining the match window size, determining a resampling factor between the current picture and the reference picture based on the match window size, and performing resampling of the reference picture on the current picture using the resampling factor.
EFFECT: increase of efficiency of encoding and decoding a video bitstream.
20 cl, 11 dwg, 1 tbl
