Mode dependent down-sampling and interpolation scheme for high efficiency video coding |
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Authors: | Qingbo Wu Hongliang Li |
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Affiliation: | School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China |
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Abstract: | 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. |
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Keywords: | Video coding High definition H.264/AVC Down-sampling |
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