利用运动信息及率失真代价的HEVC帧间快速算法

HEVC Inter fast algorithm use of motion information and rate-distortion cost

针对高效视频编码(HEVC)帧间预测过程所引入较高的复杂度,分别提出提前决策skip模式,编码单元(CU)提前终止分割以及变换单元(TU)提前终止分割。首先,根据自然视频序列多采用skip模式,利用当前块和空间相邻块的已编码信息提前决定skip模式;其次,为了避免编码不必要的深度,利用先前已编码块的率失真代价(rdcost)决策CU提前终止分割;最后,利用当前预测残差块的纹理复杂度决策TU的提前终止分割。实验结果表明,提出的算法最终可以节省编码时间43.78%,同时造成bj?ntegaard delta bit rate(BDBR)的损失为1.675%。通过实验数据的比较,在对视频质量的影响忽略不计的情况下,能够很大程度上减少复杂度。

High Efficient Video Coding（HEVC）of inter-frame prediction process is introduced for a high complexity.This paper proposes early skip mode decision, Coding Unit（CU）early termination partition and Transform Unit（TU）early termination partition. First, natural video sequence has a high probability of using skip mode, using current block and encoded information blocks of spatially adjacent early decide on skip mode. Meanwhile, in order to avoid unnecessary coding depth, the rate-distortion cost of the previously encoded block is used to decide on CU early termination partition.Last, TU early termination partition is decided by using texture complexity of the current prediction residual block. Experimental results show the proposed algorithm can save encode time 43.78%, at the same time 1.67% of losses of bj？ntegaard delta bit rate（BDBR）. By comparing the experimental data under the condition that the quality of video is negligible, can largely reduce the complexity of encoder.