Intra prediction using weighted average of pixel values according to prediction direction
- Authors
- Kim, Kibaek; Jung, Dongjin; Jang, Jinik; Jeong, Jechang
- Issue Date
- Jul-2011
- Keywords
- Coding efficiency; H.264/AVC; Intra prediction; Low pass filter
- Citation
- World Academy of Science, Engineering and Technology, v.5, no.7, pp.815 - 818
- Indexed
- SCOPUS
- Journal Title
- World Academy of Science, Engineering and Technology
- Volume
- 5
- Number
- 7
- Start Page
- 815
- End Page
- 818
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/168118
- DOI
- 10.5281/zenodo.1070745
- ISSN
- 2010-376X
- Abstract
- In this paper, we proposed a method to reduce quantization error. In order to reduce quantization error, low pass filtering is applied on neighboring samples of current block in H.264/AVC. However, it has a weak point that low pass filtering is performed regardless of prediction direction. Since it doesn't consider prediction direction, it may not reduce quantization error effectively. Proposed method considers prediction direction for low pass filtering and uses a threshold condition for reducing flag bit. We compare our experimental result with conventional method in H.264/AVC and we can achieve the average bit-rate reduction of 1.534% by applying the proposed method. Bit-rate reduction between 0.580% and 3.567% are shown for experimental results.
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