Improving Intra Prediction in High Efficiency Video Coding

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Improving Intra Prediction in High Efficiency Video Coding

Improving Intra Prediction in High Efficiency Video Coding

Abstract 

 

Improving Intra Prediction in High Efficiency Video Coding.Intra frame coding is essential in both still image and video coding.In the block-based coding scheme, the spatial redundancy can be removed by utilizing the correlation between the current pixel and its neighboring reconstructed pixels.Almost without exception, linear filters are used in these prediction schemes.

In H.264/AVC and H.265/HEVC, a copying-based intra prediction is used.

Intra prediction is an important tool in intra-frame video coding to reduce the spatial redundancy. In current coding standard H.265/high-efficiency video coding (HEVC), a copying-based method based on the boundary (or interpolated boundary)

Both the theoretical analysis and the experimental results show the effectiveness of the proposed intra prediction method.
An average gain of 2.3% on all intra coding can be achieved with the HEVC reference software.

Conclusion

This Improving Intra Prediction in High Efficiency Video Coding paper has two contributions: 1) it discusses the intra prediction weights in the situation when the predicted samples have low correlation with the reference sample and the reference samples have deviation, and 2) proposes a novel intra prediction scheme using iterative filtering, which is suitable for cases in 1). The proposed method is used as an extra intra prediction mode in addition to the copying-based HEVC intra prediction scheme.