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1. WO2020116376 - MOVING IMAGE DECODING DEVICE AND MOVING IMAGE ENCODING DEVICE

Publication Number WO/2020/116376
Publication Date 11.06.2020
International Application No. PCT/JP2019/046959
International Filing Date 02.12.2019
IPC
H04N 19/119 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
119Adaptive subdivision aspects e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
H04N 19/167 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
167Position within a video image, e.g. region of interest
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 19/186 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
186the unit being a colour or a chrominance component
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
CPC
H04N 19/119
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
119Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
H04N 19/167
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
167Position within a video image, e.g. region of interest [ROI]
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 19/186
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
186the unit being a colour or a chrominance component
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
  • シャープ株式会社 SHARP KABUSHIKI KAISHA [JP]/[JP]
Inventors
  • 周 天洋 ZHOU, Tianyang
  • 猪飼 知宏 IKAI, Tomohiro
  • 佐々木 瑛一 SASAKI, Eiichi
  • 八杉 将伸 YASUGI, Yukinobu
Agents
  • 特許業務法人HARAKENZO WORLD PATENT & TRADEMARK HARAKENZO WORLD PATENT & TRADEMARK
Priority Data
2018-22986407.12.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) MOVING IMAGE DECODING DEVICE AND MOVING IMAGE ENCODING DEVICE
(FR) DISPOSITIF DE DÉCODAGE D'IMAGE ANIMÉE ET DISPOSITIF D'ENCODAGE D'IMAGE ANIMÉE
(JA) 動画像復号装置および動画像符号化装置
Abstract
(EN)
In the related art, there is an issue in which a processing delay increases due to chroma intra prediction in a small block in a case where separate trees are used in brightness and chroma, or in a case where brightness chroma prediction is used which includes multiplication in chroma intra prediction. In a case where two trees have differences in brightness and chroma, when an 8x8 brightness size block is used, qt_split_cu_flag is not decoded and is derived as 0, and when an 8x4/4x8 brightness size block is used, mtt_split_cu_flag is not decoded and is derived as 0. In addition, when the size of the target block is smaller than a prescribed size, a chroma intra mode is derived from any one among a DC, left direction prediction, or upper direction prediction.
(FR)
Dans l'état de la technique associé, il existe un problème selon lequel un retard de traitement augmente suite à l'intraprédiction de chrominance dans un petit bloc dans un cas où des arbres séparés sont utilisés pour la luminosité et la chrominance, ou dans un cas où une prédiction de chrominance et de luminosité est utilisée, prédiction qui comprend une multiplication dans l'intraprédiction de chrominance. Dans un cas où deux arbres ont des différences de luminosité et de chrominance, lorsqu'un bloc de luminosité de taille 8x8 est utilisé, qt_split_cu_flag n'est pas décodé et est dérivé comme étant 0, et lorsqu'un bloc de luminosité de taille 8x4/4x8 est utilisé, mtt_split_cu_flag n'est pas décodé et est dérivé comme étant 0. De plus, lorsque la taille du bloc cible est inférieure à une taille préétablie, un mode intra de chrominance est dérivé à partir d'un des modes suivants : DC, prédiction vers la gauche ou prédiction vers le haut.
(JA)
従来の輝度と色差で別のツリーを用いる場合や色差イントラ予測で乗算を含む輝度色差予測を用いる場合には、小ブロックにおける色差イントラ予測による処理遅延が大きくなるという課題がある。輝度と色差で異なる2つのツリーを用いる場合において、輝度サイズで8x8ブロックの場合にqt_split_cu_flagを復号せずに0と導出し、輝度サイズで8x4/4x8ブロックの場合にmtt_split_cu_flagを復号せずに0と導出することを特徴とする。また、対象ブロックのサイズが所定のサイズ未満の場合には、DC、左方向予測、上方向予測の何れか1つから色差イントラモードを導出する。
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