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Journal Article
Transform with Residual Rearrangement for HEVC Intra Coding
- Authors
- Nam-Uk Kim, Sung-Chang Lim, Jungwon Kang, Hui Yong Kim, Yung-Lyul Lee
- Issue Date
- 2019-10
- Citation
- Signal Processing : Image Communication, v.78, pp.322-330
- ISSN
- 0923-5965
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- In video compression, transformation plays a significant role in the energy compaction of spatial domain data into frequency domain data. In the HEVC intra prediction, Discrete Cosine Transform (DCT) and Discrete Sine Transform (DST) are used to concentrate the spatial residual signals into low-frequency components. DCT has shown good compression performance in both intra and inter residual coding, but when the spatial residual signals are not uniformly distributed, its coding efficiency decreases. This paper proposes a transform method that applies DCT or residual-rearranged DST to improve the coding efficiency in HEVC intra coding. The proposed method selects the best transform in terms of coding efficiency between the DCT and residual-rearranged DST for all block sizes. The experimental results show that, compared with the HEVC intra coding, the proposed method reduces the luma Bjontegaard Delta (BD) rates by 2.6%.
- KSP Keywords
- Coding efficiency, Compression performance, Discrete cosine Transform, Discrete sine transform(DST), Energy compaction, Frequency components, Frequency domain(FD), Intra coding, Intra-prediction, Low frequency, Residual coding
This work is distributed under the term of Creative Commons License (CCL)
(CC BY NC ND)
(CC BY NC ND)
