Patent ID: 11909981
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. An apparatus for transmitting data for a video, the apparatus comprising:
at least one processor configured to obtain a bitstream for the video, wherein the bitstream is generated based on deriving prediction information for a current coding block, deriving a current luma transform block from the current coding block, deriving a split flag information that specifies whether the current coding block is split, determining a value of a syntax element cbf_luma that specifies whether a luma residual other than 0 is present in the current luma transform block, deriving a bin constituting a codeword of the syntax element cbf_luma based on the value of the syntax element cbf_luma, deriving context information on the bin constituting the codeword of the syntax element cbf_luma, and encoding the split flag information, the prediction information, and the bin based on the context information; and
a transmitter configured to transmit the data comprising the bitstream,
wherein the deriving the context information includes deriving the context information based on information on a transform depth (trafoDepth) 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.