Motion vector difference encoding method and encoding device, and motion vector difference decoding method and decoding device

摘要

Obtains sequence MMVD information indicating whether the merge mode with motion vector difference (MMVD) is applicable in the current sequence from the sequence parameter set, and when MMVD mode is applicable according to the sequence MMVD information, the current included in the current sequence First MMVD information indicating whether the MMVD mode is applied in the first inter prediction mode for a block is obtained from the bitstream, and when the MMVD mode is applied in the first inter prediction mode according to the first MMVD information, it is obtained from the bitstream A video decoding method for restoring a motion vector of the current block for use in the first inter prediction mode using one motion vector difference distance and a motion vector difference direction, and restoring the current block using the motion vector of the current block Is suggested.