计算机科学 ›› 2017, Vol. 44 ›› Issue (6): 290-293.doi: 10.11896/j.issn.1002-137X.2017.06.051
单娜娜,周巍,段哲民
SHAN Na-na, ZHOU Wei and DUAN Zhe-min
摘要: 在高性能视频压缩标准中,由于熵编码算法的高度复杂性和变换系数的庞大计算量,使得变换系数编码成为影响视频编码效率的瓶颈之一。根据变换系数大都是零或一些绝对值较小的数,以及两类熵编码方法各自的特点,提出一种针对变换系数熵编码的优化算法,通过减少上下文自适应算术编码字节的数量达到提高变换系数熵编码效率的目的。实验结果证明,与标准的HM 10.0算法相比,采用所提算法可以在QP为2,12和22时分别减少37.31%,26.34%和20.63%的编码时间。
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