Patent ID: 11968359
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. A method for transmitting data for image information, the method comprising:
obtaining a bitstream of the image information including prediction mode information and residual information; and
transmitting the data comprising the bitstream of the image information including the prediction mode information and the residual information,
wherein the bitstream is generated based on determining that an intra prediction is applied for a current block, constructing a most probable mode (MPM) list by deriving MPM candidates for the current block based on neighboring blocks adjacent to the current block, wherein the neighboring blocks comprises a left neighboring block and an upper neighboring block, determining an intra prediction mode for the current block, generating prediction mode information based on the intra prediction being applied for the current block, generating prediction samples for the current block based on the intra prediction mode for the current block, generating residual samples for the current block based on the prediction samples, generating residual information based on the residual samples, and encoding the image information including the prediction mode information and the residual information,
wherein the MPM list is constructed based on checking a condition 1 whether the left neighboring block and the upper neighboring block are the same intra prediction mode, checking a condition 2 whether a mode number of the left neighboring block is greater than a mode number of a DC mode based on a case where the condition 1 is satisfied, checking a condition 3 whether the mode number of the left neighboring block and a mode number of the upper neighboring block are greater than the mode number of the DC mode based on a case where the condition 1 is not satisfied, checking a condition 4 whether a difference between the mode number of the left neighboring block and the mode number of the upper neighboring block is equal to 1 based on a case where the condition 3 is satisfied, checking a condition 5 whether one of the mode number of the left neighboring block and the mode number of the upper neighboring block is greater than the mode number of the DC mode based on a case where the condition 3 is not satisfied, constructing the MPM list based on at least one of the condition 1 to the condition 5,
wherein the intra prediction mode for the current block is determined based on generating MPM flag information based on whether the intra prediction mode for the current block is included among the MPM candidates, generating remaining mode information for indicating the intra prediction mode for the current block among remaining intra prediction modes except the MPM candidates, based on the MPM flag information,
wherein the remaining mode information is generated based on a value of the MPM flag information being equal to 0,
wherein the MPM flag information and the remaining mode information are encoded, and
wherein the remaining mode information is encoded based on a truncated binary (TB) binarization type.