Title:
CLIPPING LEVELS FOR NON-LINEAR ADAPTIVE LOOP FILTER
Document Type and Number:
WIPO Patent Application WO/2020/259621
Kind Code:
A1
Abstract:
A method for in-loop filtering by performing adaptive loop filtering on a reconstructed frame of a video stream, implemented by an encoding device or a decoding device, comprising forming differences between a pixel of the reconstructed frame and neighboring pixels in a connected area of the pixel, clipping the differences according to respective clipping levels, forming a weighted sum of the clipped differences, and adding the weighted sum to the pixel to determine a filtered pixel, wherein the respective clipping levels are chosen from a same set of clipping levels for the luma and chroma components.
Inventors:
STEPIN VICTOR ALEXEEVICH (CN)
IKONIN SERGEY YURIEVICH (CN)
ALSHINA ELENA ALEXANDROVNA (DE)
IKONIN SERGEY YURIEVICH (CN)
ALSHINA ELENA ALEXANDROVNA (DE)
Application Number:
PCT/CN2020/098229
Publication Date:
December 30, 2020
Filing Date:
June 24, 2020
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H04N19/186
Domestic Patent References:
| WO2012144876A2 | 2012-10-26 |
Foreign References:
| US10621731B1 | 2020-04-14 | |||
| US20130177085A1 | 2013-07-11 |
Other References:
GARY J. SULLIVAN: "Overview of the High Efficiency Video Coding (HEVC) Standard", IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, vol. 22, no. 12, December 2012 (2012-12-01), XP011487803, DOI: 10.1109/TCSVT.2012.2221191
QIAN CHENYUNFEI ZHENGPENG YINXIAOAN LUJOEL SOL'EQIAN XUEDOUARD FRANCOISDAPENG WU: "Classified Quadtree-based Adaptive Loop Filter", IEEE INTERNATIONAL CONFERENCE ON MULTIMEDIA AND EXPO, 2011, pages 1 - 6, XP031964846, DOI: 10.1109/ICME.2011.6012172
TAQUET J ET AL.: "CES: Results of tests CES-3.1, CE5-3.2, CES-3.3 and CE5.3.4 on Non-Linear Adaptive Loop Filter", MPEG MEETING, vol. 126, no. m46901, 26 March 2019 (2019-03-26)
TAQUET J ET AL.: "Non-CES: Complementary results of tests CES-3 on Non-Linear ALF", MPEG MEETING, vol. 126, no. m46902, 21 March 2019 (2019-03-21)
CHEN J ET AL.: "Algorithm description for Versatile Video Coding and Test Model 5 (VTMS", MPEG MEETING, vol. 126, no. m48054, 21 May 2019 (2019-05-21)
See also references of EP 3977736A4
QIAN CHENYUNFEI ZHENGPENG YINXIAOAN LUJOEL SOL'EQIAN XUEDOUARD FRANCOISDAPENG WU: "Classified Quadtree-based Adaptive Loop Filter", IEEE INTERNATIONAL CONFERENCE ON MULTIMEDIA AND EXPO, 2011, pages 1 - 6, XP031964846, DOI: 10.1109/ICME.2011.6012172
TAQUET J ET AL.: "CES: Results of tests CES-3.1, CE5-3.2, CES-3.3 and CE5.3.4 on Non-Linear Adaptive Loop Filter", MPEG MEETING, vol. 126, no. m46901, 26 March 2019 (2019-03-26)
TAQUET J ET AL.: "Non-CES: Complementary results of tests CES-3 on Non-Linear ALF", MPEG MEETING, vol. 126, no. m46902, 21 March 2019 (2019-03-21)
CHEN J ET AL.: "Algorithm description for Versatile Video Coding and Test Model 5 (VTMS", MPEG MEETING, vol. 126, no. m48054, 21 May 2019 (2019-05-21)
See also references of EP 3977736A4
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