Mode dependent down-sampling and interpolation scheme for high efficiency video coding

作者：Wu, Qingbo; Li, Hongliang^*

来源：Signal Processing: Image Communication , 2013, 28(6): 581-596.

DOI：10.1016/j.image.2013.03.003

• Video coding
• High definition
• H.264/AVC
• Down-sampling

In this paper, a mode dependent down-sampling and interpolation scheme is proposed to improve the coding efficiency of the intra prediction module. In the proposed method, we elaborately design the down-sampling structures and interpolation schemes for each directional intra prediction mode by minimizing the spatial prediction distance. The sampled pixels are predicted with a traditional directional intra prediction scheme, and the non-sampled pixels are predicted from the interpolation of their neighboring reconstructed sampling pixels. Both the residuals of the sampled and non-sampled pixels are encoded at last. Experimental results show that the proposed method achieves an average 7.52% bitrate reduction relative to KTA reference software. Since the down-sampling structure and interpolation method is only related to the intra mode, there is no additional overhead at the encoder.

• 出版日期2013-7
• 单位电子科技大学