Method and apparatus for video encoding with sharing SAO parameters between color components, method and apparatus for video decoding with sharing SAO parameters between color components

摘要

The present invention discloses a method and an apparatus for encoding a video and a method and an apparatus for decoding a video to generate a recovered image of which error compared to an original image is minimized. Disclosed is the method for decoding the video including sample adaptive offset (SAO) adjustment, comprising the steps of: obtaining a slice SAO parameter of a current slice from a slice header of a bitstream which is received; obtaining luma SAO usage information for a luma component of the current slice and chroma SAO usage information for chroma components from the slice SAO parameter; determining whether to perform an SAO adjustment on the luma component of the current slice on the basis of the luma SAO usage information; and determining the same result for whether to perform the SAO adjustment on a first chroma component and a second chroma component of the current slice on the basis of the chroma SAO usage information.