Edge-Preserving Reference Sample Filtering and Mode-Dependent Interpolation for Intra-Prediction
- Authors
- Ko, Hyunsuk; Lee, Jinho; Kang, Jungwon; Kim, Hui Yong
- Issue Date
- Jan-2020
- Publisher
- Institute of Electrical and Electronics Engineers
- Keywords
- Intra prediction; edge-preserving reference sample filter; bilateral filter; multiple reference sample lines
- Citation
- IEEE Transactions on Circuits and Systems for Video Technology, v.30, no.1, pp.205 - 216
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE Transactions on Circuits and Systems for Video Technology
- Volume
- 30
- Number
- 1
- Start Page
- 205
- End Page
- 216
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/1424
- DOI
- 10.1109/TCSVT.2018.2883960
- ISSN
- 1051-8215
- 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.
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