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1. WO2020141993 - SIDE MOTION REFINEMENT IN VIDEO ENCODING/DECODING SYSTEMS

Publication Number WO/2020/141993
Publication Date 09.07.2020
International Application No. PCT/SE2019/051254
International Filing Date 09.12.2019
IPC
H04N 19/513 2014.01
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
H04N 19/139 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
136Incoming video signal characteristics or properties
137Motion inside a coding unit, e.g. average field, frame or block difference
139Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
H04N 19/159 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
159Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
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 19/56 2014.01
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
56Motion estimation with initialisation of the vector search, e.g. estimating a good candidate to initiate a search
CPC
H04N 19/513
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
H04N 19/577
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
577Motion compensation with bidirectional frame interpolation, i.e. using B-pictures
Applicants
  • TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) [SE]/[SE]
Inventors
  • LIU, Du
  • SJÖBERG, Rickard
  • STRÖM, Jacob
  • YU, Ruoyang
Agents
  • LUNDQVIST, Alida
Priority Data
62/787,58702.01.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SIDE MOTION REFINEMENT IN VIDEO ENCODING/DECODING SYSTEMS
(FR) AFFINEMENT DE MOUVEMENT LATÉRAL DANS DES SYSTÈMES DE CODAGE/DÉCODAGE VIDÉO
Abstract
(EN)
There are provided mechanisms, performed by a decoder, for decoding a current block in a current picture of a video bitstream. The current picture has a current picture order count. The method comprises decoding, from the video bitstream, a first motion vector for the current block relative to a first reference block of a first reference picture having a first picture order count. The method comprises decoding, from the video bitstream, a second motion vector for the current block relative to a second reference block of a second reference picture having a second picture order count. The method further comprises generating a similarity metric based on a comparison of the first motion vector and the second motion vector. The method further comprises determining whether to refine the first motion vector based on the similarity metric. Responsive to determining whether to refine the first motion vector, the method further comprises generating a first refined motion vector from the first motion vector. The method further comprises performing motion compensation to derive a first reference block from the first reference picture using the first refined motion vector.
(FR)
L'invention concerne des mécanismes, mis en œuvre par un décodeur, de décodage d'un bloc courant d'une image courante d'un flux binaire vidéo. L'image courante a un compte d'ordre d'image courante. Le procédé consiste à décoder, à partir du flux binaire vidéo, un premier vecteur de mouvement du bloc courant par rapport à un premier bloc de référence d'une première image de référence ayant un premier compte d'ordre d'image. Le procédé consiste à décoder, à partir du flux binaire vidéo, un second vecteur de mouvement du bloc courant par rapport à un second bloc de référence d'une seconde image de référence ayant un second compte d'ordre d'image. Le procédé consiste en outre à générer une mesure de similarité sur la base d'une comparaison du premier vecteur de mouvement et du second vecteur de mouvement. Le procédé consiste en outre à déterminer s'il convient d'affiner le premier vecteur de mouvement sur la base de la mesure de similarité. En réponse à la détermination du fait qu'il convient, ou non, d'affiner le premier vecteur de mouvement, le procédé consiste en outre à générer un premier vecteur de mouvement affiné à partir du premier vecteur de mouvement. Le procédé consiste en outre à exécuter une compensation de mouvement pour dériver un premier bloc de référence à partir de la première image de référence à l'aide du premier vecteur de mouvement affiné.
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