A novel fast approach for H.264 inter mode decision

作者：Bu Jiajun^*; Lou Shuiyong; Chen Chun; Yang Zhi

来源：Fourth IASTED International Conference on Communications, Internet, and Information Technology, CIIT 2005, 2005-10-31 to 2005-11-02.

• Mode decision
• Non-stationary blocks

The JVT/H.264 video coding standard gains much higher coding efficiency than the previous standards. However, it also leads to higher computational complexity at the encoder mainly due to the variable-block-size motion estimation and the mode decision. In this paper, we aim at filtering unlikely candidate modes in mode decision to reduce the computational complexity without sacrificing the video quality. Our algorithm takes advantage of two effective schemes: one is filtering some unlikely modes according to the distribution of the stationary 8×8 blocks and the other is directly selecting the best ultimate mode by analyzing the change characteristic of the non-stationary blocks. Experimental results and comparative analysis are given to demonstrate that the encoder with our algorithm can achieve a speed-up factor of about 35% compared to the JM8.5 encoder with Fast Full Search algorithm while the average PSNR loss and the bit rate increase are negligible.

• 出版日期2005
• 单位浙江大学