基于纹理特征的HEVC帧内编码快速算法

为了降低高效视频编码（HEVC）帧内编码的复杂度，提出了一种基于编码块纹理特征的帧内编码快速算法.首先，对当前编码单元（CU）进行预处理，获取CU的纹理复杂程度和方向特性.其次，根据纹理复杂度决定部分CU是否划分，跳过率失真代价计算，减少不必要的划分与裁剪.然后，根据纹理方向减少帧内预测模式的数量，降低帧内预测过程的复杂度.实验结果表明，在全I帧模式下快速算法与HM10.0相比，码率（BR）上升0.649%，峰值信噪比（PSNR）降低0.059 dB，帧内编码时间平均减少56.18%.

Fast Intra Coding Algorithm for HEVC Based on Texture Property

In order to reduce the complexity of intra encoding in High Efficiency Video Coding (HEVC), a fast algorithm for intra encoding based on coded block texture features is proposed. Firstly, the texture complexity and direction characteristics are extracted from the current Coding Unit (CU) by using a preprocessing method. Secondly, according to the texture complexity, the algorithm can determine whether to divide some CU, skip the complex rate of distortion calculation, and cut down the CU unnecessary division and cutting. Then, according to the texture direction, the algorithm can decrease the number of intra prediction modes, which can reduce the computational complexity of intra prediction. On the basis of the experimental results, compared with HM10.0, the proposed algorithm can save 56.18% coding time on average, with the Bit Rate (BR) increases of 0.649%, and the Peak Signal-to-Noise Ratio (PSNR) losses lower 0.059 dB, respectively.