Patent ID: 9596463
Date: 2017-03-14
CPC Classifications: H04N

Claim:
1. A method of decoding loop filter parameters in a video decoding process comprising: receiving an indication, in one or more of a slice header, an adaptation parameter set (APS), a sequence parameter set (SPS), or a picture parameter set (PPS), indicating whether or not to use a codebook to perform a loop filtering process, wherein the codebook contains a plurality of entries, wherein each of the entries in the codebook comprises adaptive loop filter (ALF) coefficients or sample adaptive offset (SAO) offset values, and wherein the codebook is applicable for one or more blocks of video data; and performing the loop filtering process for the one or more blocks of video data based on the received indication, wherein in the case that the indication indicates that the codebook is to be used for performing the loop filter process for the one or more blocks of video data, the method further comprises performing the loop filtering using the codebook, and in the case that the indication indicates that the codebook is not to be used for performing the loop filtering process for the one or more blocks of video data, the method further comprises: receiving additional SAO offset values or additional ALF coefficients for use with the one or blocks of video data; and performing the loop filtering process using the received additional SAO offset values or additional ALF coefficients instead of the codebook.