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为了进一步减少UMHexagonS算法的运算量,在详细分析UMHexagonS算法搜索过程的基础上,对运动方向的预测进行了研究,并将运动方向预测与UMHexagonS算法中的正方形搜索和非均匀多层次六边形搜索相结合,提出了一种改进算法。利用三个不同的序列进行测试仿真,测试仿真结果表明,在搜索精度和码率相似的情况下,改进后的UMHexagonS算法搜索点数明显减少。
In order to further reduce the computational complexity of UMHexagonS algorithm, based on a detailed analysis of the UMHexagonS algorithm search process, the prediction of motion direction is studied, and the prediction of motion direction is compared with the square search in UMHexagonS algorithm and the non-uniform multi-level hexagon search In combination, an improved algorithm is proposed. Three different sequences are used to test and simulate. The simulation results show that the search points of the improved UMHexagonS algorithm are significantly reduced when the search accuracy and the code rate are similar.