Patent ID: 11917161
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A transmission method of data for an image, the method comprising:
obtaining a bitstream for the image, wherein the bitstream is generated based on determining a prediction mode for a current block as an inter prediction mode using symmetric motion vector differences (SMVD), deriving motion information of the current block based on the SMVD, generating predicted samples of the current block based on the motion information, generating prediction related information including inter prediction type information and SMVD flag information, and encoding the prediction related information including the inter prediction type information and the SMVD flag information; and
transmitting the data comprising the bitstream,
wherein the prediction related information includes the SMVD flag information based on the inter prediction type information representing bi-prediction is applied to the current block,
wherein at least one reference picture index indicating a short-term reference picture among reference picture indices is derived as the motion information, and
wherein the at least one reference picture index is derived based on picture order count (POC) difference between the short-term reference picture and a current picture.