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논문 기본 정보

자료유형
학위논문
저자정보

Xiang Li (광운대학교, 광운대학교 대학원)

지도교수
Donggyu Sim
발행연도
2017
저작권
광운대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (3)

초록· 키워드

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This thesis proposed a method for adaptive loop filter (ALF) complexity reduction in the decoding process. In the original ALF algorithm, all of the pixels will be filtered if the current frame is I frame. The proposed algorithm is designed on top of the local gradient calculation already existing in the original ALF process. Both in the encoder side and decoder side, the homogeneous areas will be checked and be skipped from the filtering process, and filter coefficient calculation is also modified that only the inhomogeneous areas are involved in coefficient calculation. The proposed algorithm is implemented in future video coding reference software JEM version 3.0. And the proposed algorithm is applied for the frame level filtering and all intra configuration, Compared with the JEM 3.0 anchor, The proposed algorithm has 0.31%, 0.76% and 0.73% bit rate loss for luma (Y) and chroma (U and V) respectively with about 8% decoding time decreasing

목차

Chapter 1 Introduction 1
Chapter 2 HEVC and Future Video Coding 5
2.1 Brief Introduction of Encoder and Decoder 7
2.2.Block Structure 8
2.3 Prediction Coding 11
2.4 Transform 18
2.5 Enhanced CABAC 20
2.6 Software and Common Test Condition 20
Chapter 3 ALF Complexity Reduction based on Local Homogeneity 22
3.1 ALF Overall Description 22
3.1.1 Filter Coefficient Derivation 23
3.1.2 Filter Shape 32
3.1.4 Merge Mode 33
3.1.5 CU Level Control 34
3.2 ALF Processing 35
3.2.1 Existing ALF Processing 35
3.2.2 Proposed ALF Processing 39
Chapter 4 Experimental Performance and Analysis 42
4.1 Experimental Environment 42
4.2 Experimental Performance and Analysis 44
Chapter 5 Conclusion 50

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