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1. WO2020114515 - REDUCING THE IN-CTU STORAGE REQUIRED BY AFFINE INHERITANCE

Publication Number WO/2020/114515
Publication Date 11.06.2020
International Application No. PCT/CN2019/124041
International Filing Date 09.12.2019
IPC
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
CPC
H04N 19/105
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
103Selection of coding mode or of prediction mode
105Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
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 19/42
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
42characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
H04N 19/52
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
50using predictive coding
503involving temporal prediction
51Motion estimation or motion compensation
513Processing of motion vectors
517by encoding
52by predictive encoding
Applicants
  • BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD. [CN]/[CN]
  • BYTEDANCE INC. [US]/[US]
Inventors
  • ZHANG, Kai
  • ZHANG, Li
  • LIU, Hongbin
  • XU, Jizheng
  • WANG, Yue
Agents
  • LIU, SHEN & ASSOCIATES
Priority Data
PCT/CN2018/11994608.12.2018CN
PCT/CN2018/12111814.12.2018CN
PCT/CN2019/07509414.02.2019CN
PCT/CN2019/07584622.02.2019CN
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) REDUCING THE IN-CTU STORAGE REQUIRED BY AFFINE INHERITANCE
(FR) RÉDUCTION DU STOCKAGE EN UNITÉ CTU REQUISE PAR HÉRITAGE AFFINE
Abstract
(EN)
Reducing the in-CTU storage required by affine inheritance is described. One example method includes associating a first group of control point motion vectors (CPMVs) for determining inherited motion information of blocks coded after a first block, with a second group of CPMVs for deriving MVs of sub-blocks of the first block or a third group of CPMVs that is signaled for the first block, wherein the first group of CPMVs is not identical with the second group of CPMVs or the third group of CPMVs; determining inherited motion information for a second block, which is coded after the first block, based on the first group of CPMVs, and performing a conversation between the second block and a bitstream representation of the second block by using the inherited motion information.
(FR)
L'invention concerne la réduction du stockage en unité CTU requise par héritage affine. Un procédé représentatif comprend l'association d'un premier groupe de vecteurs de mouvement de points de commande (CPMV) pour déterminer une information de mouvement hérité de blocs codés après un premier bloc, à un deuxième groupe de de vecteurs CPMV pour dériver des vecteurs de mouvement de sous-blocs du premier bloc ou un troisième groupe de vecteurs CPMV qui est signalé pour le premier bloc, le premier groupe de vecteurs CPMV n'étant pas identique au second groupe de vecteurs CPMV ou au troisième groupe de vecteurs CPMV; la détermination d'information de mouvement hérité pour un second bloc, qui est codé après le premier bloc, sur la base du premier groupe de vecteurs CPMV, et la réalisation d'une conversation entre le second bloc et une représentation de flux binaire du second bloc au moyen de l'information de mouvement hérité.
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