상세정보
학술지
Transform with Residual Rearrangement for HEVC Intra Coding
- 발행일
- 201910
- 출처
- Signal Processing : Image Communication, v.78, pp.322-330
- ISSN
- 0923-5965
- 출판사
- Elsevier
- 협약과제
- 19HR2300, 초고실감 미디어 서비스 실현을 위해 HEVC/3DA 대비 2배 압축을 제공하는 5세대 비디오/오디오 표준 핵심 기술 개발 및 표준화, 강정원
- 초록
- 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 제안 키워드
- Coding efficiency, Compression performance, Discrete cosine Transform, Discrete sine transform(DST), Energy Compaction, Frequency components, Intra Coding, Intra prediction, Residual coding, Residual signal, Transform method