FIELD: coding/decoding images.
SUBSTANCE: coding efficiency is achieved by obtaining the desired prediction value of the current block or sub-block of the specified current block, if the characteristic information of the specified current block satisfies a specific condition of the following steps: determining the first initial prediction value based on the first information about the unidirectional movement of the current block, and determining the second initial prediction value based on second information about the unidirectional movement of the current block; determining a horizontal speed based on said first prediction seed and second prediction seed; determining a vertical speed based on said first prediction seed and second prediction seed; obtaining a prediction compensation value based on said horizontal speed and vertical speed; and deriving a prediction value to be sought based on said first prediction seed value, second prediction seed value, and prediction compensation value.
EFFECT: increasing the coding efficiency.
15 cl, 8 dwg
