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1. WO2020064949 - DEBLOCKING OR DERINGING FILTER AND ENCODER, DECODER AND METHOD FOR APPLYING AND VARYING A STRENGTH OF A DEBLOCKING OR DERINGING FILTER

Publication Number WO/2020/064949
Publication Date 02.04.2020
International Application No. PCT/EP2019/076080
International Filing Date 26.09.2019
IPC
H04N 19/117 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
117Filters, e.g. for pre-processing or post-processing
H04N 19/157 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
157Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
H04N 19/176 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
169characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
17the unit being an image region, e.g. an object
176the region being a block, e.g. a macroblock
H04N 19/82 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
80Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation
82involving filtering within a prediction loop
H04N 19/86 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
85using pre-processing or post-processing specially adapted for video compression
86involving reduction of coding artifacts, e.g. of blockiness
H04N 19/96 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
90using coding techniques not provided for in groups H04N19/10-H04N19/85103
96Tree coding, e.g. quad-tree coding
CPC
H04N 19/117
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
117Filters, e.g. for pre-processing or post-processing
H04N 19/157
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
157Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
H04N 19/176
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
169characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
17the unit being an image region, e.g. an object
176the region being a block, e.g. a macroblock
H04N 19/82
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
80Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation
82involving filtering within a prediction loop
H04N 19/86
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
85using pre-processing or post-processing specially adapted for video compression
86involving reduction of coding artifacts, e.g. of blockiness
H04N 19/96
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
90using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
96Tree coding, e.g. quad-tree coding
Applicants
  • FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. [DE]/[DE]
Inventors
  • HELMRICH, Christian
Agents
  • SCHENK, Markus
  • ZIMMERMANN, Tankred
  • STÖCKELER, Ferdinand
  • ZINKLER, Franz
  • HERSINA, Günter
  • BURGER, Markus
  • SCHLENKER, Julian
  • PFITZNER, Hannes
  • SCHAIRER, Oliver
  • KÖNIG, Andreas
Priority Data
18197609.328.09.2018EP
18201517.219.10.2018EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DEBLOCKING OR DERINGING FILTER AND ENCODER, DECODER AND METHOD FOR APPLYING AND VARYING A STRENGTH OF A DEBLOCKING OR DERINGING FILTER
(FR) FILTRE DE DÉBLOCAGE OU D'ÉLIMINATION D'ARTEFACTS DE BORD ("DERINGING") ET CODEUR, DÉCODEUR ET PROCÉDÉ POUR APPLIQUER ET FAIRE VARIER LA FORCE D'UN FILTRE DE DÉBLOCAGE OU D'ÉLIMINATION D'ARTEFACTS DE BORD
Abstract
(EN)
The invention concerns an encoder, a decoder and methods for applying and varying a strength of a deblocking or deringing filter (110, 120) for filtering a block (1000) of a picture (12), wherein the deblocking filter (110, 120) is configured to determine, for each of at least eight border portions (1011, 1012, 1013, 1014, 1021, 1022, 1023, 1024) of a border (1010) of the block (1000), a dissimilarity between an unfiltered content (1015) of the block (1000) and a surrounding picture content (1016) around the block (1000) along the respective border portion (1011, 1012, 1013, 1014, 1021, 1022, 1023, 1024), the eight border portions (1011, 1012, 1013, 1014, 1021, 1022, 1023, 1024) including four corner border portions (1021, 1022, 1023, 1024), each arranged at a corner of the block (1000), and four edge border portions (1011, 1012, 1013, 1014), each arranged at intermediary portions of the border (1010) between the corners of the block (1000). Furthermore, the deblocking filter is configured to parametrize a deblocking filtering of the block (1000) using the dissimilarities determined for the at least eight border portions (1011, 1012, 1013, 1014, 1021, 1022, 1023, 1024) in order to obtain a filtered content of the block (1000).
(FR)
L'invention concerne un codeur, un décodeur et des procédés pour appliquer et faire varier une force d'un filtre de déblocage ou d'élimination d'artefact de bord ("deringing") (110, 120) pour filtrer un bloc (1000) d'une image (12), dans laquelle le filtre de déblocage (110, 120) est configuré pour déterminer, pour chacune d'au moins huit parties de bordure (1011, 1012, 1013, 1014, 1021, 1022, 1023, 1024) d'une bordure (1010) du bloc (1000), une dissimilitude entre un contenu non filtré (1015) du bloc (1000) et un contenu d'image environnant (1016) autour du bloc (1000) le long de la portion de frontière respective (1011, 1012, 1013, 1014, 1021, 1022, 1023, 1024), les huit portions de frontière (1011, 1012, 1013, 1014, 1021), 1022, 1023, 1024) comprenant quatre portions de bordure de coin (1021, 1022, 1023, 1024), chacune disposée à un coin du bloc (1000), et quatre portions de bordure de bord (1011, 1012, 1013, 1014), chacune disposée à des portions intermédiaires de la bordure (1010) entre les coins du bloc (1000). De plus, le filtre de déblocage est configuré pour paramétrer un filtrage de déblocage du bloc (1000) en utilisant les dissimilitudes déterminées pour les au moins huit portions de frontière (1011, 1012, 1013, 1014, 1021, 1022, 1023, 1024) afin d'obtenir un contenu filtré du bloc (1000).
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