一種改進(jìn)的UMHexagonS運(yùn)動(dòng)估計(jì)算法
發(fā)布時(shí)間：2018-07-21 21:45
【摘要】：在分析UMHexagonS運(yùn)動(dòng)估計(jì)算法的基礎(chǔ)上,根據(jù)中心偏移特性在起始搜索點(diǎn)預(yù)測中加入了原點(diǎn)預(yù)測;利用預(yù)測運(yùn)動(dòng)矢量的運(yùn)動(dòng)信息把當(dāng)前塊的運(yùn)動(dòng)類型區(qū)分為慢速運(yùn)動(dòng)、中速運(yùn)動(dòng)和快速運(yùn)動(dòng),并采取相應(yīng)的搜索策略;考慮到常見視頻序列水平、垂直方向運(yùn)動(dòng)相對劇烈的特性,提出了用13點(diǎn)中菱形模板和8點(diǎn)多層次大菱形模板分別代替正方形模板和多層次六邊形模板;在中菱形搜索和大菱形搜索的步驟后均加入提前終止判定,減少了對不重要搜索點(diǎn)的搜索。仿真結(jié)果表明,改進(jìn)后的新算法在保證信噪比和編碼碼率基本不變的情況下,使得運(yùn)動(dòng)估計(jì)的時(shí)間減少了10%～23%,增強(qiáng)了編碼的實(shí)時(shí)性。
[Abstract]:Based on the analysis of the UMHexagonS motion estimation algorithm, the origin prediction is added to the initial search point prediction according to the center offset characteristic, and the motion type of the current block is classified as slow motion by using the motion information of the predicted motion vector. Medium speed motion and fast motion, and corresponding search strategy; considering the horizontal and vertical motion characteristics of common video sequences, In this paper, we propose to replace square template and multi-level hexagonal template with 13:00 rhombohedral template and 8-point multi-level rhombohedral template respectively, and to add early termination judgment after the steps of middle rhombic search and rhomboid search. Reduces the search for unimportant search points. The simulation results show that the improved algorithm can reduce the time of motion estimation by 10 / 23 and enhance the real time of the coding under the condition that the SNR and the coding rate are not changed.
【作者單位】： 中國計(jì)量學(xué)院光學(xué)與電子科技學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(61007012) 浙江省科技創(chuàng)新團(tuán)體項(xiàng)目(2010R50020)
【分類號(hào)】：TN919.81
[Abstract]:Based on the analysis of the UMHexagonS motion estimation algorithm, the origin prediction is added to the initial search point prediction according to the center offset characteristic, and the motion type of the current block is classified as slow motion by using the motion information of the predicted motion vector. Medium speed motion and fast motion, and corresponding search strategy; considering the horizontal and vertical motion characteristics of common video sequences, In this paper, we propose to replace square template and multi-level hexagonal template with 13:00 rhombohedral template and 8-point multi-level rhombohedral template respectively, and to add early termination judgment after the steps of middle rhombic search and rhomboid search. Reduces the search for unimportant search points. The simulation results show that the improved algorithm can reduce the time of motion estimation by 10 / 23 and enhance the real time of the coding under the condition that the SNR and the coding rate are not changed.
【作者單位】： 中國計(jì)量學(xué)院光學(xué)與電子科技學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(61007012) 浙江省科技創(chuàng)新團(tuán)體項(xiàng)目(2010R50020)
【分類號(hào)】：TN919.81
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7 鄧智s，
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