BDOF-BASED INTER PREDICTION METHOD AND DEVICE

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BDOF-BASED INTER PREDICTION METHOD AND DEVICE

This abstract first appeared for US patent application 20250113039 titled 'BDOF-BASED INTER PREDICTION METHOD AND DEVICE

Original Abstract Submitted

an image decoding method includes: deriving an l0 motion vector and a l1 motion vector of the current block; deriving prediction samples of the current block based on the l0 motion vector and the l1 motion vector; and generating reconstructed samples of the current block based on the prediction samples. deriving the prediction samples includes applying bi-directional optical flow (bdof) to the current block based on whether the condition for applying bdof to the current block is satisfied, and the application condition of the bdof includes a condition whereby the values of l0 luma weighted prediction flag information and l1 luma weighted prediction flag information are both zero, where the a value of each of the l0 luma weighted prediction flag information and l1 luma weighted prediction flag information being 0 represents that a weight factor for each of a l0 and l1 prediction luma components does not exist, respectively.