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为了实现高清、超高清视频实时编码通信传输,针对高效视频编码(HEVC)帧间编码计算复杂度过高的问题,根据图像的文理复杂度和编码单元的零块统计特征,提出一种新的HEVC快速帧间模式判决算法。根据Merge模式下整单元一分为四的4个子编码单元纹理相似度确定是否提前终止编码单元(CU)划分,同时利用帧间2 N×2 N预测模式下零系数与非零系数分布的区域统计特征,选择符合零块分布特征的最佳预测单元(PU)模式。实验结果表明,在低延迟B(LDB,low-delay B)和随机访问(RA,random access)配置条件下,提出的算法在保持编码性能基本不变的情况下,HEVC帧间预测编码时间分别平均减少了60.2%与59.4%。
In order to realize real-time encoded communication transmission of high-definition and ultra-high-definition video, according to the complexity of high-efficiency video coding (HEVC) inter-frame coding and according to the statistical complexity of coding complexity and coding block zero-block statistics, HEVC fast inter mode decision algorithm. According to the four sub-coding unit texture similarities of one-divisor of the whole unit in Merge mode, whether to terminate coding unit (CU) pre-termination or not, and using the region of zero-coefficient and non-zero coefficient distribution in the 2 N × 2 N prediction mode between frames Statistical features, select the best prediction unit (PU) pattern consistent with the distribution of zero blocks. The experimental results show that under the conditions of low delay B (LDB) and random access (RA) configuration, the proposed algorithm maintains the coding performance substantially unchanged, the HEVC inter prediction coding time respectively On average, it decreased by 60.2% and 59.4% respectively.