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학술지 Shuffled Discrete Sine Transform in Inter-Prediction Coding
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최준우, 김남욱, 임성창, 강정원, 김휘용, 이영렬
ETRI Journal, v.39 no.5, pp.672-682
한국전자통신연구원 (ETRI)
16MR2100, 초고실감 미디어 서비스 실현을 위해 HEVC/3DA 대비 2배 압축을 제공하는 5세대 비디오/오디오 표준 핵심 기술 개발 및 표준화, 김휘용
Video compression exploits statistical, spatial, and temporal redundancy, as well as transform and quantization. In particular, the transform in a frequency domain plays a major role in energy compaction of spatial domain data into frequency domain data. The high efficient video coding standard uses the type-II discrete cosine transform (DCT-II) and type-VII discrete sine transform (DST-VII) to improve the coding efficiency of residual data. However, the DST-VII is applied only to the Intra 4 3 4 residual block because it yields relatively small gains in the larger block than in the 4 3 4 block. In this study, after rearranging the data of the residual block, we apply the DST-VII to the inter-residual block to achieve coding gain. The rearrangement of the residual block data is similar to the arrangement of the basis vector with a the lowest frequency component of the DST-VII. Experimental results show that the proposed method reduces the luma-chroma (Cb+Cr) BD rates by approximately 0.23% to 0.22%, 0.44% to 0.58%, and 0.46% to 0.65% for the random access, low delay B, and low delay P configurations, respectively.
KSP 제안 키워드
Coding Gain, Coding efficiency, DCT-II, DST-VII, Discrete cosine Transform, Discrete sine transform(DST), Energy Compaction, Frequency components, High efficient video coding(HEVC), Inter prediction, Low Delay
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