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1. WO2020141908 - IMAGE CODING METHOD AND APPARATUS USING TRANSFORM SKIP FLAG

Publication Number WO/2020/141908
Publication Date 09.07.2020
International Application No. PCT/KR2020/000064
International Filing Date 02.01.2020
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 19/132 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
132Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
H04N 19/70 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
70characterised by syntax aspects related to video coding, e.g. related to compression standards
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 19/137 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
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 19/132
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
132Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
H04N 19/137
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
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 19/70
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
70characterised by syntax aspects related to video coding, e.g. related to compression standards
Applicants
  • 엘지전자 주식회사 LG ELECTRONICS INC. [KR]/[KR]
Inventors
  • 유선미 YOO, Sunmi
  • 최정아 CHOI, Jungah
  • 김승환 KIM, Seunghwan
  • 허진 HEO, Jin
  • 남정학 NAM, Junghak
  • 최장원 CHOI, Jangwon
Agents
  • 인비전 특허법인 ENVISION PATENT & LAW FIRM
Priority Data
62/787,37601.01.2019US
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) IMAGE CODING METHOD AND APPARATUS USING TRANSFORM SKIP FLAG
(FR) PROCÉDÉ ET APPAREIL DE CODAGE D'IMAGE À L'AIDE D'UN INDICATEUR D'OMISSION DE TRANSFORMÉE
(KO) 변환 스킵 플래그를 이용한 영상 코딩 방법 및 장치
Abstract
(EN)
An image decoding method according to the present document comprises the steps of: acquiring prediction mode information and residual related information from a bitstream; deriving, on the basis of the prediction mode information, prediction samples of a current block by performing prediction; deriving residual samples of the current block on the basis of the residual related information; and generating restoration samples of the current block on the basis of the prediction samples and the residual samples, and determines whether the residual related information includes a transform skip flag on the basis of whether the current block is a luminance component block or a chrominance component block, wherein the transform skip flag indicates whether a transform skip is applied to the current block.
(FR)
La présente invention concerne un procédé de décodage d'image qui comprend les étapes consistant : à acquérir des informations de mode de prédiction et des informations associées résiduelles à partir d'un train de bits ; à déduire, sur la base des informations de mode de prédiction, des échantillons de prédiction d'un bloc courant par réalisation d'une prédiction ; à déduire des échantillons résiduels du bloc courant sur la base des informations associées résiduelles ; et à générer des échantillons de restauration du bloc courant sur la base des échantillons de prédiction et des échantillons résiduels, et déterminer si les informations associées résiduelles comprennent un indicateur d'omission de transformée sur la base du fait que le bloc courant est un bloc de composante de luminance ou un bloc de composante de chrominance, l'indicateur d'omission de transformée indiquant si une omission de transformation est appliquée au bloc courant.
(KO)
본 문서에 따른 영상 디코딩 방법은 비트스트림으로부터 예측 모드 정보 및 레지듀얼 관련 정보를 획득하는 단계, 상기 예측 모드 정보를 기반으로 예측을 수행하여 현재 블록의 예측 샘플들을 도출하는 단계, 상기 레지듀얼 관련 정보를 기반으로 상기 현재 블록의 레지듀얼 샘플들을 도출하는 단계 및 상기 예측 샘플들 및 상기 레지듀얼 샘플들을 기반으로 상기 현재 블록의 복원 샘플들을 생성하는 단계를 포함하고, 상기 현재 블록이 휘도 성분 블록인지 색차 성분 블록인지를 기반으로 상기 레지듀얼 관련 정보가 변환 스킵 플래그를 포함하는지 여부가 결정되고, 상기 변환 스킵 플래그는 상기 현재 블록에 변환 스킵이 적용되었는지 여부를 나타내는 것을 특징으로 한다.
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