VIDEO ENCODING METHOD AND APPARATUS, AND VIDEO DECODING METHOD AND APPARATUS, FOR SIGNALING SAO PARAMETER

摘要

Disclosed is a video decoding method for signaling a sample adaptive offset (SAO) parameter, the method comprising the steps of: acquiring, from a bitstream, location information of a plurality of band groups for a current block included in a video; acquiring, from the bitstream, offsets for bands included in each band group; determining a plurality of band groups for compensating a pixel sample value of the current block on the basis of the location information of the plurality of band groups; and compensating the sample value of a reconstructed pixel included in the current block using the acquired offsets, wherein each of the determined band groups may include at least one band.