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Novel distribution model of transformed coefficients in video coding using quad-tree structured block partitioning

Title
Novel distribution model of transformed coefficients in video coding using quad-tree structured block partitioning
Authors
Kang J.-W.
Ewha Authors
강제원
SCOPUS Author ID
강제원scopus
Issue Date
2017
Journal Title
Multidimensional Systems and Signal Processing
ISSN
0923-6082JCR Link
Citation
vol. 28, no. 4, pp. 1589 - 1609
Keywords
DCT coefficient distributionHEVCParameter estimationQuad-tree structureR-D modelRate control
Publisher
Springer New York LLC
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Today’s video coding standard such as high efficiency video coding uses a full quad-tree structured block partitioning, so the underlying statistics of transformed coefficients becomes more complicated to estimate than the previous standards due to the coding structure. However, a statistical distribution of transformed residue is important for a design of a smart encoder. Thus, in this paper, we present a theoretic analysis of a distribution of transformed coefficients produced from an encoder using different transform sizes, and derive a probability density function (pdf) for the estimation. The proposed density model provides a more accurate distribution model than the conventional pdfs. Parameters are theoretically estimated, and rate-distortion model is established from the proposed pdf. We also apply the proposed method to a rate control problem to show the efficiency of the proposed density model. Our experimental results show that the proposed method is better capable of modeling the mixed sources of multiple-type transform coefficients occurred from the quad-tree coding structure of transform and provides an accurate estimate in rate control. © 2016, Springer Science+Business Media New York.
DOI
10.1007/s11045-016-0438-8
Appears in Collections:
엘텍공과대학 > 전자공학과 > Journal papers
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