WO2020255689A1 - Dispositif de codage d'image, dispositif de décodage d'image, procédé, et programme - Google Patents

Dispositif de codage d'image, dispositif de décodage d'image, procédé, et programme Download PDF

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Publication number
WO2020255689A1
WO2020255689A1 PCT/JP2020/021615 JP2020021615W WO2020255689A1 WO 2020255689 A1 WO2020255689 A1 WO 2020255689A1 JP 2020021615 W JP2020021615 W JP 2020021615W WO 2020255689 A1 WO2020255689 A1 WO 2020255689A1
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WO
WIPO (PCT)
Prior art keywords
subblock
prediction
attention
motion vector
block
Prior art date
Application number
PCT/JP2020/021615
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English (en)
Japanese (ja)
Inventor
真悟 志摩
Original Assignee
キヤノン株式会社
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Filing date
Publication date
Application filed by キヤノン株式会社 filed Critical キヤノン株式会社
Publication of WO2020255689A1 publication Critical patent/WO2020255689A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/103—Selection of coding mode or of prediction mode
    • H04N19/105—Selection 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/167—Position within a video image, e.g. region of interest [ROI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised 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
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised 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 the unit being an image region, e.g. an object
    • H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised 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 the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
    • H04N19/436—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation using parallelised computational arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
    • H04N19/51—Motion estimation or motion compensation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
    • H04N19/51—Motion estimation or motion compensation
    • H04N19/513—Processing of motion vectors
    • H04N19/517—Processing of motion vectors by encoding
    • H04N19/52—Processing of motion vectors by encoding by predictive encoding

Definitions

  • the in-loop filter unit 108 performs in-loop filter processing such as a deblocking filter and a sample adaptive offset on the reproduced image data stored in the frame memory 107, and re-stores the filtered image data in the frame memory 107. ..
  • the prediction unit 103 of the present embodiment always considers the attention subblock when the attention subblock is a subblock located at the upper right of the attention basic block, regardless of whether or not the coding processing is executed in parallel. It is assumed that the prediction process of the subblock of interest is performed without using the subblock (UR) located at the upper right of. In other words, if the upper right subblock of the attention subblock is in the basic block located at the upper right of the attention basic block, the upper right subblock is excluded from the subblocks used in the prediction process. As a result, it is possible to reduce the mounting cost such as holding the pixel value caused by the reference of the upper right basic block regardless of whether or not the coding processing is executed in parallel.
  • the inverse quantization / inverse conversion unit 105 inversely quantizes the input quantization coefficient to reproduce the conversion coefficient, and further performs inverse orthogonal conversion of the reproduced conversion coefficient to reproduce the prediction error. Then, the inverse quantization / inverse conversion unit 105 outputs the reproduced prediction error to the image reproduction unit 106.
  • the decoding unit 203 decodes the code data output from the separation decoding unit 202 and reproduces the quantization coefficient and the prediction information. Then, the decoding unit 203 outputs the obtained quantization coefficient and prediction information to the inverse quantization / inverse conversion unit 204 and the image reproduction unit 205. Further, the decoding unit 203 outputs and stores the motion vector information included in the prediction information in the motion vector memory 209.

Abstract

Le but de la présente invention est de réduire la complexité de mise en œuvre en limitant des blocs de référence à utiliser pour un traitement de prédiction en fonction de relations de position de blocs, et en outre d'améliorer la faisabilité d'un traitement parallèle. À cet effet, ce dispositif de codage d'image pour coder une image mobile comprend : une unité de division pour séparer, dans l'ordre de balayage de trame, des blocs de base d'une taille prédéfinie à partir d'images de trame dans l'image mobile à coder, et diviser en outre les blocs de base en de multiples sous-blocs ; et une unité de prédiction pour réaliser une prédiction intra ou une prédiction inter sur les sous-blocs obtenus par l'unité de division. Lors de la réalisation d'une prédiction inter sur un sous-bloc d'intérêt dans un bloc de base d'intérêt et un sous-bloc positionné sur le côté droit supérieur du sous-bloc d'intérêt est à l'intérieur d'un bloc de base positionné sur le côté droit supérieur du bloc de base d'intérêt, l'unité de prédiction réalise une prédiction inter tout en excluant le sous-bloc positionné sur le côté droit supérieur du sous-bloc d'intérêt à partir d'une prédiction de vecteur de mouvement pour une prédiction inter.
PCT/JP2020/021615 2019-06-20 2020-06-01 Dispositif de codage d'image, dispositif de décodage d'image, procédé, et programme WO2020255689A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-114934 2019-06-20
JP2019114934A JP2021002723A (ja) 2019-06-20 2019-06-20 画像符号化装置及び画像復号装置及び方法及びプログラム

Publications (1)

Publication Number Publication Date
WO2020255689A1 true WO2020255689A1 (fr) 2020-12-24

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PCT/JP2020/021615 WO2020255689A1 (fr) 2019-06-20 2020-06-01 Dispositif de codage d'image, dispositif de décodage d'image, procédé, et programme

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Country Link
JP (1) JP2021002723A (fr)
WO (1) WO2020255689A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013069557A1 (fr) * 2011-11-10 2013-05-16 ソニー株式会社 Dispositif et procédé de traitement d'image

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013069557A1 (fr) * 2011-11-10 2013-05-16 ソニー株式会社 Dispositif et procédé de traitement d'image

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JP2021002723A (ja) 2021-01-07

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