Patent ID: 9253489
Filing Date: 2016-02-02
CPC Classification: H04N

Claim Text:
1. A method for decoding a video by a video decoder, the method comprising: obtaining video information from a bitstream, wherein the video information includes prediction information for deriving prediction sample and offset information for applying an offset to a reconstructed sample; performing prediction to derive a prediction block with the prediction information; reconstructing a picture using the derived prediction block; and filtering on the reconstructed picture, wherein the step of the filtering includes applying a deblocking filtering process on the reconstructed picture; and applying sample adaptive offset (SAO) process to at least one of a luma sample or a chroma sample in the reconstructed picture independently after the deblocking filtering is completed, wherein the offset information includes first flag information indicating whether the SAO process is applied to the luma sample or not, and second flag information indicating whether the SAO process is applied to the chroma sample or not, and wherein the offset information includes band information indicating a starting band of a band group consisting of n (n is integer) bands among 32 bands, the band group is determined based on the starting band, the offset for the luma sample or the chroma sample is applied to at least one of the n bands.