基于学习模型的3D-HEVC提前Merge模式终止算法  

Early Merge mode decision algorithm for 3D-HEVC based on learning model

作　　者：李跃 杨高波 丁湘陵 朱亚培[4] LI Yue;YANG Gaobo;DING Xiangling;ZHU Yapei(Computer School,University of South China,Hengyang 421001,China;School of Computer Science and Electronic Engineering,Hunan University,Changsha 410082,China;School of Computer Science and Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Faculty of Physics and Electronic Information Science,Hengyang Normal University,Hengyang 421002,China)

机构地区：[1]南华大学计算机学院,湖南衡阳421001 [2]湖南大学信息科学与工程学院,湖南长沙410082 [3]湖南科技大学计算机科学与工程学院,湖南湘潭411201 [4]衡阳师范学院物理与电子学院,湖南衡阳421002

出　　处：《通信学报》2019年第7期104-113,共10页Journal on Communications

基　　金：国家重点研发计划基金资助项目(No.2018YFB1003205);国家自然科学基金资助项目(No.61572183)~~

摘　　要：作为高效视频编码(HEVC)的扩展,3D-HEVC 标准有效地提高了 3D 视频的压缩效率,但是也带来了很高的编码计算复杂度。为了显著地降低 3D-HEVC 编码复杂度,提出了一种提前 Merge 模式终止算法。首先,提取 Merge 模式编码后的残差信号作为特征信息;然后,根据当前编码帧内已经编码的编码单元(CU)的最优Merge 模式残差信号建立学习模型;最后,提取当前 CU 的 Merge 模式的残差信号,并且利用学习模型预测 Merge模式是否为最优模式。实验结果表明,提出的提前 Merge 模式终止算法分别将 3D-HEVC 纹理视点和深度图编码的时间降低了 41.9%和 24.3%,且编码性能的降低几乎可忽略不计。相较于现有的提前 Merge 模式算法,提出的提前 Merge 模式终止算法能进一步降低 3D-HEVC 的编码时间,并且设计简单,易于集成到 3D-HEVC 测试模型。3D-high efficiency video coding (3D-HEVC) standard is an extension of HEVC. Though 3D-HEVC effective- ly improves the compression efficiency of 3D video, it also brings huge computational complexity. To greatly reduce the 3D-HEVC coding complexity, an early Merge mode decision approach was proposed. The residual signal that encoded by the Merge mode was firstly extracted as feature information. A learning model was established in terms of the residual signals of the coding unit (CU) in current frame that used early Merge mode as the optimal mode. Finally, the residual signal was extracted for the Merge mode of current CU, and the learning model was used to predict whether the Merge mode was the optimal mode or not. Experimental results show that the proposed early Merge mode decision approach reduces the coding times of 3D-HEVC texture views and depth maps about 41.9% and 24.3%, respectively, and the cod- ing performance degradation is almost negligible. Compared with existing early Merge mode decision approaches, the proposed approach further reduces the coding time, and can be easily integrated into the 3D-HEVC test model due to its design simplicity.

关 键 词：3D高效视频编码 快速Merge模式决定 残差信号 学习模型 

分 类 号：TN919.8[电子电信—通信与信息系统]