Image information encoding and decoding method

摘要

The present invention relates to an image information encoding and decoding method and a device for same. One embodiment of an image information encoding method according to the present invention, as an image information encoding method according to another embodiment of the present invention, includes the steps of: generating a restore block; applying a deblocking filter on the restore block; applying a Sample Adaptive Offset (SAO) on the restore block having the deblocking filter applied thereon; and transmitting information on the SAO application. During the applying of the SAO, the SAO is applied to chroma pixels, and during the transmitting of the information, in addition to information on whether the SAO is applied on the chroma pixels, at least one of area information, division information on the SAO coverage area, SAO type information, and SAO offset information is transmitted.

主权项

1. A video decoding method for deriving a reconstructed picture, the method comprising:
obtaining video information including picture reconstruction information for reconstructing a picture and offset information from a bitstream; reconstructing the picture on a basis of the picture reconstruction information; and applying in-loop filtering to the reconstructed picture, wherein applying the in-loop filtering includes applying a deblocking filtering process to the reconstructed picture, and applying a sample adaptive offset (SAO) process to at least one of a luma sample and a chroma sample after completing the deblocking filtering process, wherein the offset information includes first offset information indicating whether the SAO process is applied to the luma sample and second offset information indicating whether a SAO process is applied to the chroma sample, 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, an offset from the SAO process for the luma sample or the chroma sample is applied to at least one of the n bands.