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Journal Article Shuffled Discrete Sine Transform in Inter-Prediction Coding
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Authors
최준우, 김남욱, Sung-Chang Lim, Kang Jung Won, Kim Hui Yong, 이영렬
Issue Date
201710
Source
ETRI Journal, v.39 no.5, pp.672-682
ISSN
1225-6463
Publisher
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.17.0116.0867
Project Code
16MR2100, Development and Standardization of 5th Generation Video/Audio Coding Technology for Ultra Gifh Quality Media Services, Kim Hui Yong
Abstract
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 Keywords
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
This work is distributed under the term of Korea Open Government License (KOGL)
(Type 4: : Type 1 + Commercial Use Prohibition+Change Prohibition)
Type 4: