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1. WO2021004887 - ENCODER, DECODER, METHODS AND COMPUTER PROGRAMS FOR AN IMPROVED LOSSLESS COMPRESSION

Publication Number WO/2021/004887
Publication Date 14.01.2021
International Application No. PCT/EP2020/068672
International Filing Date 02.07.2020
IPC
H04N 19/102 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
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 19/12 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
12Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform and sub-band transform or selection between H.263 and H.264
H04N 19/124 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
124Quantisation
H04N 19/13 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
13Adaptive entropy coding, e.g. adaptive variable length coding or context adaptive binary arithmetic coding
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
CPC
H04N 19/102
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
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 19/12
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
12Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
H04N 19/124
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
124Quantisation
H04N 19/13
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
13Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
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
Applicants
  • FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. [DE]/[DE]
Inventors
  • HELMRICH, Christian
  • BROSS, Benjamin
  • NGUYEN, Tung Hoang
  • SCHWARZ, Heiko
  • MARPE, Detlev
  • WIEGAND, Thomas
Agents
  • SCHENK, Markus
  • ZIMMERMANN, Tankred
  • STÖCKELER, Ferdinand
  • ZINKLER, Franz
  • HERSINA, Günter
  • BURGER, Markus
  • SCHAIRER, Oliver
  • SCHLENKER, Julian
  • PFITZNER, Hannes
  • KÖNIG, Andreas
Priority Data
19184790.405.07.2019EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ENCODER, DECODER, METHODS AND COMPUTER PROGRAMS FOR AN IMPROVED LOSSLESS COMPRESSION
(FR) CODEUR, DÉCODEUR, PROCÉDÉS ET PROGRAMMES INFORMATIQUES DE COMPRESSION SANS PERTE AMÉLIORÉE
Abstract
(EN)
Decoder for decoding a picture from a data stream, configured to check (106) whether a plurality (98) of coding parameters, which are contained in the data stream (14), relate to predetermined portion (100) of the picture (12) and control a prediction residual transform mode and a quantization accuracy with respect to the predetermined portion, are indicative of a coding parameter setting corresponding to a lossless prediction residual coding. Responsive to the plurality of coding parameters being indicative of the coding parameter setting corresponding to the lossless prediction residual coding, the decoder is configured to set one or more predetermined coding options relating to one or more tools of the decoder for processing a prediction residual corrected predictive reconstruction with respect to the predetermined portion so that the one or more tools are disabled with respect to the predetermined portion.
(FR)
L'invention concerne un décodeur permettant de décoder une image à partir d'un flux de données, configuré pour vérifier (106) si une pluralité (98) de paramètres de codage qui sont contenus dans le flux de données (14), se rapportent à une partie prédéterminée (100) de l'image (12) et commandent un mode de transformation résiduelle de prédiction et une précision de quantification par rapport à la partie prédéterminée, indiquent un réglage de paramètre de codage correspondant à un codage résiduel de prédiction sans perte. En réponse au fait que la pluralité de paramètres de codage indique que le réglage de paramètre de codage correspond au codage résiduel de prédiction sans perte, le décodeur est configuré pour régler une ou plusieurs options de codage prédéterminées concernant un ou plusieurs outils du décodeur afin de traiter une reconstruction prédictive corrigée résiduelle de prédiction par rapport à la partie prédéterminée de telle sorte que lesdits outils sont désactivés par rapport à la partie prédéterminée.
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