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Edge-Preserving Reference Sample Filtering and Mode-Dependent Interpolation for Intra-Prediction
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- Authors
- Hyunsuk Ko, Jinho Lee, Jungwon Kang, Hui Yong Kim
- Issue Date
- 2020-01
- Citation
- IEEE Transactions on Circuits and Systems for Video Technology, v.30, no.1, pp.205-216
- ISSN
- 1051-8215
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- High Efficiency Video Coding is the latest video compression standard, which achieves the best coding performance up until now. Specifically, intra prediction is a tool that removes spatial redundancy in a single frame and then a predictor is generated from its neighboring reference samples based on a specific interpolation scheme. In this paper, we propose an edge-preserving intra reference sample filtering method using a bilateral filter, which is implemented as hardware-friendly. Two parameters of the bilateral filter are modeled by block size and mean amplitude of the pixel intensity. In addition, a mode-dependent interpolation scheme is proposed, which takes the directionality of angular predictions into account. The experimental results show that a BD rate-reduction of 0.63% can be achieved for all intra configurations by combining the two methods. We also demonstrate that the subjective quality of the reconstructed frames can be improved.
- KSP Keywords
- BD rate, Bilateral Filter, Block size, Coding performance, Edge-preserving, Filtering method, Hardware-friendly, Interpolation scheme, Intra prediction, Mode-dependent, Pixel intensity