Patent ID: 11871009
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A transmission method of data for image, the method comprising:
obtaining a bitstream of video information including Block-based Delta Pulse Code Modulation (BDPCM) related information for a current block; and
transmitting the data including the bitstream of the video information including the BDPCM related information,
wherein prediction samples for a first sample and a second sample of the current block are derived based on the BDPCM related information and a neighboring sample of the current block,
wherein an intra prediction mode of a prediction direction of the current block derived based on a BDPCM direction flag is derived as an intra prediction mode of the current block,
wherein the BDPCM related information includes the BDPCM direction flag representing the prediction direction,
wherein based on the prediction direction being a horizontal direction, a horizontal intra prediction mode is derived as an intra prediction mode of the current block,
wherein based on the prediction direction being a vertical direction, a vertical intra prediction mode is derived as the intra prediction mode of the current block,
wherein the first sample is a sample in the current block adjacent to the neighboring sample, and the second sample is a sample in the current block adjacent to the first sample in the prediction direction,
wherein the intra prediction mode derived as the intra prediction mode of the current block is used for prediction for a block coded after the current block, and
wherein the block coded after the current block is a block within a current Coding Tree Unit (CTU) or a neighboring CTU in a current picture or a reference picture.