Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/651695
Title: Nonlocal In-Loop Filter: The Way Toward Next-Generation Video Coding?
Authors: Siwei Ma;Xinfeng Zhang;Jian Zhang;Chuanmin Jia;Shiqi Wang;Wen Gao
subject: nonlocal similarity|in-loop filtering|multimedia|graphics|HEVC|sparse representation|video coding
Year: 2016
Publisher: IEEE
Abstract: In-loop filtering has emerged as an essential coding tool since H.264/AVC, due to its delicate design, which reduces different kinds of compression artifacts. However, existing in-loop filters rely only on local image correlations, largely ignoring nonlocal similarities. In this article, the authors explore the design philosophy of in-loop filters and discuss their vision for the future of in-loop filter research by examining the potential of nonlocal similarities. Specifically, the group-based sparse representation, which jointly exploits an image's local and nonlocal self-similarities, lays a novel and meaningful groundwork for in-loop filter design. Hard- and soft-thresholding filtering operations are applied to derive the sparse parameters that are appropriate for compression artifact reduction. Experimental results show that this in-loop filter design can significantly improve the compression performance of the High Efficiency Video Coding (HEVC) standard, leading us in a new direction for improving compression efficiency.
Description: 
URI: http://localhost/handle/Hannan/150337
http://localhost/handle/Hannan/651695
ISSN: 1070-986X
volume: 23
issue: 2
Appears in Collections:2016

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Title: Nonlocal In-Loop Filter: The Way Toward Next-Generation Video Coding?
Authors: Siwei Ma;Xinfeng Zhang;Jian Zhang;Chuanmin Jia;Shiqi Wang;Wen Gao
subject: nonlocal similarity|in-loop filtering|multimedia|graphics|HEVC|sparse representation|video coding
Year: 2016
Publisher: IEEE
Abstract: In-loop filtering has emerged as an essential coding tool since H.264/AVC, due to its delicate design, which reduces different kinds of compression artifacts. However, existing in-loop filters rely only on local image correlations, largely ignoring nonlocal similarities. In this article, the authors explore the design philosophy of in-loop filters and discuss their vision for the future of in-loop filter research by examining the potential of nonlocal similarities. Specifically, the group-based sparse representation, which jointly exploits an image's local and nonlocal self-similarities, lays a novel and meaningful groundwork for in-loop filter design. Hard- and soft-thresholding filtering operations are applied to derive the sparse parameters that are appropriate for compression artifact reduction. Experimental results show that this in-loop filter design can significantly improve the compression performance of the High Efficiency Video Coding (HEVC) standard, leading us in a new direction for improving compression efficiency.
Description: 
URI: http://localhost/handle/Hannan/150337
http://localhost/handle/Hannan/651695
ISSN: 1070-986X
volume: 23
issue: 2
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7436641.pdf2.15 MBAdobe PDFThumbnail
Preview File
Title: Nonlocal In-Loop Filter: The Way Toward Next-Generation Video Coding?
Authors: Siwei Ma;Xinfeng Zhang;Jian Zhang;Chuanmin Jia;Shiqi Wang;Wen Gao
subject: nonlocal similarity|in-loop filtering|multimedia|graphics|HEVC|sparse representation|video coding
Year: 2016
Publisher: IEEE
Abstract: In-loop filtering has emerged as an essential coding tool since H.264/AVC, due to its delicate design, which reduces different kinds of compression artifacts. However, existing in-loop filters rely only on local image correlations, largely ignoring nonlocal similarities. In this article, the authors explore the design philosophy of in-loop filters and discuss their vision for the future of in-loop filter research by examining the potential of nonlocal similarities. Specifically, the group-based sparse representation, which jointly exploits an image's local and nonlocal self-similarities, lays a novel and meaningful groundwork for in-loop filter design. Hard- and soft-thresholding filtering operations are applied to derive the sparse parameters that are appropriate for compression artifact reduction. Experimental results show that this in-loop filter design can significantly improve the compression performance of the High Efficiency Video Coding (HEVC) standard, leading us in a new direction for improving compression efficiency.
Description: 
URI: http://localhost/handle/Hannan/150337
http://localhost/handle/Hannan/651695
ISSN: 1070-986X
volume: 23
issue: 2
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7436641.pdf2.15 MBAdobe PDFThumbnail
Preview File