Novel distribution model of transformed coefficients in video coding using quad-tree structured block partitioning
- 주제(키워드) DCT coefficient distribution , HEVC , Parameter estimation , Quad-tree structure , R-D model , Rate control
- 등재 SCIE, SCOPUS
- 발행기관 Springer New York LLC
- 발행년도 2016
- 원문페이지 21 p.
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000131166
- 본문언어 영어
- Published As http://dx.doi.org/10.1007/s11045-016-0438-8
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
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
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