一种基于时域相关性的高性能视频编码快速帧间预测单元模式判决算法
doi: 10.3724/SP.J.1146.2013.00028
A Fast Inter-frame Prediction Unit Mode Decision Algorithm for High Efficiency Video Coding Based on Temporal Correlation
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摘要: 为了降低高性能视频编码(HEVC)的编码计算复杂度，根据视频时域上高度相关性的特点，该文提出一种快速高性能视频编码(HEVC)帧间预测单元(PU)模式判决算法。分析了时域上相邻帧两帧相同位置编码单元(CU)的PU模式之间的相关性；同时，针对视频中可能存在对象运动，还分析了前一帧对应位置CU的周边CU与当前帧中当前CU间PU模式的相关性。根据分析的时域相关性，跳过当前CU中冗余的PU模式，从而降低编码复杂度。实验结果表明，在编码效率和峰值信噪比(PSNR)损失很小的情况下，在目前已有的HEVC快速帧间预测算法的基础上，进一步降低了31.30%的编码时间。
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关键词:
- 高性能视频编码(HEVC) /
- 帧间预测 /
- 预测单元(PU) /
- 编码时间
Abstract: In order to reduce the computational complexity, a fast inter-frame Prediction Unit (PU) mode decision algorithm is proposed for High Efficiency Video Coding (HEVC) based on the strong temporal correlation in video sequences. The correlation of PU modes of Coding Unit (CU) between two adjacent frames is analyzed. Considering the probable objects motion in videos, the correlation of PU modes between the surrounding CUs of the corresponding located CUs in the previous frame and the current CU is also analyzed. Based on the analysis, the redundant PU modes are skipped for the current CU to reduce the coding computational complexity. The expriment results show that the proposed method save 31.30% of coding time compared with the current fast inter perdiction algorithm for HEVC under the condition of minimal lose of coding effencicy and PSNR. -
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