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1. WO2018128417 - VIDEO DECODING METHOD AND APPARATUS AND VIDEO ENCODING METHOD AND APPARATUS

Publication Number WO/2018/128417
Publication Date 12.07.2018
International Application No. PCT/KR2018/000181
International Filing Date 04.01.2018
IPC
H04N 19/105 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
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 19/109 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
103Selection of coding mode or of prediction mode
109among a plurality of temporal predictive coding modes
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 19/176 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 19/109
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
109among a plurality of temporal predictive coding modes
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 19/139
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
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
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
Applicants
  • 삼성전자 주식회사 SAMSUNG ELECTRONICS CO., LTD. [KR]/[KR]
Inventors
  • 알쉰알렉산더 ALSHIN, Alexander
  • 알쉬나엘레나 ALSHINA, Elena
Agents
  • 리앤목 특허법인 Y.P.LEE, MOCK & PARTNERS
Priority Data
62/442,10804.01.2017US
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) VIDEO DECODING METHOD AND APPARATUS AND VIDEO ENCODING METHOD AND APPARATUS
(FR) PROCÉDÉ ET APPAREIL DE DÉCODAGE DE VIDÉO ET PROCÉDÉ ET APPAREIL DE CODAGE DE VIDÉO
(KO) 비디오 복호화 방법 및 그 장치 및 비디오 부호화 방법 및 그 장치
Abstract
(EN)
Disclosed is a video decoding method comprising: determining a displacement vector per unit time in a horizontal direction or a vertical direction of pixels of a current block, including pixels adjacent to the inside of the boundary of the current block, by using values for reference pixels included in a first reference block and a second reference block, without using stored values related to pixels located on the outside of the boundary of the first reference block and the second reference block; and acquiring a prediction block of the current block by performing block unit motion compensation and pixel group unit motion compensation of the current block, on the basis of a gradient value in a horizontal direction or a vertical direction of a first corresponding reference pixel in the first reference block corresponding to a current pixel included in a current pixel group in the current block, a gradient value in a horizontal direction or a vertical direction of a second corresponding reference pixel in the second reference block corresponding to the current pixel, a pixel value of the first corresponding reference pixel, a pixel value of the second corresponding reference pixel, and a displacement vector per unit time in a horizontal direction or a vertical direction of the current pixel, wherein the pixel group can comprise at least one pixel.
(FR)
La présente invention concerne un procédé de décodage de vidéo comprenant les étapes consistant à : déterminer un vecteur de déplacement par unité de temps dans une direction horizontale ou une direction verticale de pixels d'un bloc courant, comprenant des pixels adjacents à l'intérieur de la limite du bloc courant, en utilisant des valeurs pour des pixels de référence inclus dans un premier bloc de référence et un second bloc de référence, sans utiliser de valeurs stockées relatives à des pixels situés à l'extérieur de la limite du premier bloc de référence et du second bloc de référence; et acquérir un bloc de prédiction du bloc courant en effectuant une compensation de mouvement d'unité de bloc et une compensation de mouvement d'unité de groupe de pixels du bloc courant, sur la base d'une valeur de gradient dans une direction horizontale ou dans une direction verticale d'un premier pixel de référence correspondant dans le premier bloc de référence correspondant à un pixel courant inclus dans un groupe de pixels courants dans le bloc courant, une valeur de gradient dans une direction horizontale ou une direction verticale d'un second pixel de référence correspondant dans le second bloc de référence correspondant au pixel courant, une valeur de pixel du premier pixel de référence correspondant, une valeur de pixel du second pixel de référence correspondant, et un vecteur de déplacement par unité de temps dans une direction horizontale ou une direction verticale du pixel courant, le groupe de pixels pouvant comprendre au moins un pixel.
(KO)
제1 참조 블록 및 제2 참조 블록의 경계 외부에 위치하는 픽셀에 관하여 저장된 값의 이용 없이 제1 참조 블록 및 제2 참조 블록에 포함된 참조 픽셀들에 관한 값을 이용하여 현재 블록의 경계 안쪽에 인접하는 픽셀을 포함하는 현재 블록의 픽셀들의 수평 방향 또는 수직 방향의 단위 시간당 변위 벡터를 결정하고, 현재 블록 내 현재 픽셀 그룹에 포함된 현재 픽셀에 대응하는 제1 참조 블록 내 제1 대응 참조 픽셀의 수평 방향 또는 수직 방향의 그래디언트 값, 현재 픽셀에 대응하는 제2 참조 블록 내 제2 대응 참조 픽셀의 수평 방향 또는 수직 방향의 그래디언트 값, 제1 대응 참조 픽셀의 픽셀 값, 제2 대응 참조 픽셀의 픽셀 값 및 현재 픽셀의 수평 방향 또는 수직 방향의 단위시간당 변위 벡터에 기초하여 현재 블록의 블록단위 움직임 보상 및 픽셀 그룹단위 움직임 보상을 수행하여 현재 블록의 예측 블록을 획득하는 비디오 복호화 방법이 개시된다. 이때, 픽셀 그룹은 적어도 하나의 픽셀을 포함할 수 있다.
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