REFINED PREDICTION WITH MOTION COMPENSATION USING OPTICAL FLOW Russian patent published in 2023 - IPC H04N19/105 

FIELD: video encoding.

SUBSTANCE: means are proposed for refining motion-compensated prediction in block-based video coding. Motion-compensated prediction is used to generate predicted sample values in the current block of samples. The prediction difference value and the motion vector refinement for the current block are transmitted in the bitstream. For each sample in the current block, the spatial gradient in the sample and the scalar product of the spatial gradient and the motion vector refinement are calculated. The scalar product is scaled by an amount determined by the prediction difference value to obtain a sample difference value, and this sample difference value is added to the predicted sample value to obtain a refined sample value.

EFFECT: increase in coding efficiency while reducing the complexity of implementation.

24 cl, 14 dwg