FIELD: video encoding.
SUBSTANCE: signalling the size of an image or parts of an image that may vary from image to image. A method for decoding an encoded video bit stream is provided, 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 resampling of the reference image; based on the first flag indicating that a constant image size is not used, obtaining the second flag indicating whether the matching window size is signalled; based on the second flag indicating that the size of the match window is signalled, obtaining the size of the match window, determining an oversampling factor between the current image and the reference image based on the size of the match window, and performing resampling of the reference image on the current image using the oversampling factor. The first flag is signalled in the Sequence Parameter Set (SPS) and indicates whether the SPS match window parameters are signalled in the SPS.
EFFECT: improved efficiency of encoding and decoding the video bit stream.
16 cl, 10 dwg, 1 tbl
