24 August 2010 Fast multi-symmetry adaptive loop filter algorithm
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In order to further improve the coding performance of Block-Based and Quadtree-Based Adaptive Loop Filter (BQ_ALF), the Fast Multi-Symmetry Adaptive Loop Filter Algorithm (FMS_ALF) is proposed. Firstly, this algorithm determines the optimal symmetry filter according to area symmetry and average sum of absolute difference. Then the filter areas are obtained through the block-based and quadtree-based method in I frame and through motion vector and Rate Distortion Optimization model A (RDOA) in P or B frame .Finally the obtained areas are filtered by the optimal symmetry filter. Simulation results show that compared with BQ_ALF, the proposed algorithm reduces the coding time greatly while retains the reconstructed picture quality.
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Hongwei Li, Yunsong Li, Chengke Wu, Rui Song, Yuli Feng, "Fast multi-symmetry adaptive loop filter algorithm", Proc. SPIE 7810, Satellite Data Compression, Communications, and Processing VI, 78100Y (24 August 2010); doi: 10.1117/12.859795; https://doi.org/10.1117/12.859795

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