Patent ID: 9729884
Date: 2017-08-08
CPC Classifications: H04N

Claim:
1. An entropy decoding method comprising the steps of: deriving context information on a bin constituting a codeword of a syntax element cbf_luma that specifies whether a luma residual other than 0 is present in a current luma transform block; and deriving a value of the syntax element cbf_luma by performing an arithmetic decoding operation on the bin on the basis of the derived context information, wherein the step of deriving the context includes deriving the context information on the basis of information on a depth of the current luma transform block, wherein a luma residual other than 0 is not present in the current luma transform block when the derived value of the syntax element cbf_luma is 0, and wherein at least one luma residual other than 0 is present in the current luma transform block when the derived value of the syntax element cbf_luma is 1.