Bi-directional optical flow for improving motion compensation
Alexander Alshin, Elena A. Alshina, T. Lee · 2010
New method improving B-slice prediction is proposed. By combining the optical flow concept and high accuracy gradients evaluation we construct the algorithm which allows pixel-wise refinement of motion. This approach does not require any signaling for decoder. According to tests with WQVGA sequences bit-saving of 2%-6% can be achieved using this tool.