Optimized Index Assignment with Bi-directional Prediction in Palette Coding
SONG Chuanming1,2, CHEN Guisheng1,3, HE Xing1, FU Bo1, WANG Xianghai1
1.School of Computer and Information Technology, Liaoning Normal University, Dalian 116081 2. School of Computer Science and Technology, Dalian University of Technology, Dalian 116024 3. College of Computer Science and Technology, Jilin University, Changchun 130012
Abstract:In palette coding, the research on influence of index assignment on the coding efficiency of index map is insufficient. An optimized index assignment algorithm is proposed in this paper. With the bidirectional feedback between the index map generation and prediction, the index assignment is optimized by forward prediction, backward prediction and joint probability maximization. Thus, it is easier to predict index map accurately, and the efficiency of palette coding is improved. Experimental results show that the proposed algorithm increases the prediction accuracy of the local directional prediction algorithm compared with the multi-stage prediction algorithm.
宋传鸣,陈规胜,何兴,傅博,王相海. 调色板编码中双向预测的索引值优化分配*[J]. 模式识别与人工智能, 2017, 30(5): 385-393.
SONG Chuanming, CHEN Guisheng, HE Xing, FU Bo, WANG Xianghai. Optimized Index Assignment with Bi-directional Prediction in Palette Coding. , 2017, 30(5): 385-393.
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