Adaptive Loop Filter with Temporal Prediction

作者：Zhang Xinfeng^*; Xiong Ruiqin; Ma Siwei; Gao Wen

来源：29th Picture Coding Symposium (PCS), 2012-05-07 to 2012-05-09.

• Adaptive loop filter
• HEVC
• video coding
• temporal prediction

In this paper, we propose a method to improve adaptive loop filter (ALF) efficiency with temporal prediction. For one frame, two sets of adaptive loop filter parameters are adaptively selected by rate distortion optimization. The first set of ALF parameters is estimated by minimizing the mean square error between the original frame and the current reconstructed frame. The second set of filter parameters is the one that is used in the latest prior frame. The proposed algorithm is implemented in HM3.0 software. Compared with the HM3.0 anchor, the proposed method achieves 0.4%, 0.3% and 0.3% BD bitrate reduction in average for high efficiency low delay B, high efficiency low delay P and high efficiency random access configuration, respectively. The encoding and decoding time increase by 1% and 2% on average, respectively.

• 出版日期2012
• 单位中国科学院