WO2020256507A1 - Procédé et dispositif pour coder/décoder une image à l'aide de la prédiction intra de ligne de référence multiple et procédé de transmission de flux binaire - Google Patents

Procédé et dispositif pour coder/décoder une image à l'aide de la prédiction intra de ligne de référence multiple et procédé de transmission de flux binaire Download PDF

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Publication number
WO2020256507A1
WO2020256507A1 PCT/KR2020/008033 KR2020008033W WO2020256507A1 WO 2020256507 A1 WO2020256507 A1 WO 2020256507A1 KR 2020008033 W KR2020008033 W KR 2020008033W WO 2020256507 A1 WO2020256507 A1 WO 2020256507A1
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WO
WIPO (PCT)
Prior art keywords
current block
boundary
intra prediction
unit
prediction mode
Prior art date
Application number
PCT/KR2020/008033
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English (en)
Korean (ko)
Inventor
허진
장형문
최장원
Original Assignee
엘지전자 주식회사
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Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2020256507A1 publication Critical patent/WO2020256507A1/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
    • H04N19/102—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
    • H04N19/11—Selection of coding mode or of prediction mode among a plurality of spatial predictive coding modes
    • 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
    • H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
    • 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
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/593—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial prediction techniques
    • 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
    • H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards

Definitions

  • the boundary of the preset area is a left boundary of a picture including the current block, an upper boundary of a slice including the current block, an upper boundary of a tile including the current block, It may be at least one of a left boundary of the slice and a left boundary of the tile.
  • the video source generator 11 may acquire a video/image through a process of capturing, synthesizing, or generating a video/image.
  • the video source generator 11 may include a video/image capturing device and/or a video/image generating device.
  • the video/image capture device may include, for example, one or more cameras, a video/image archive including previously captured video/images, and the like.
  • the video/image generating device may include, for example, a computer, a tablet and a smartphone, and may (electronically) generate a video/image.
  • a virtual video/image may be generated through a computer or the like, and in this case, a video/image capturing process may be substituted as a process of generating related data.
  • FIG. 2 is a diagram schematically illustrating an image encoding apparatus to which an embodiment according to the present disclosure can be applied.
  • the filtering unit 240 may apply filtering to the reconstructed signal to improve subjective/objective image quality.
  • the filtering unit 240 may generate a modified reconstructed picture by applying various filtering methods to the reconstructed picture, and the modified reconstructed picture may be converted to the memory 250, specifically the DPB of the memory 250. Can be saved on.
  • the various filtering methods may include, for example, deblocking filtering, sample adaptive offset, adaptive loop filter, bilateral filter, and the like.
  • qt_split_flag is a second value (eg, "0")
  • the current CU is not divided into a quadtree, but becomes a leaf node (QT_leaf_node) of the quadtree.
  • the leaf nodes of each quadtree can then be further partitioned into a multitype tree structure. That is, a leaf node of a quad tree may be a node (MTT_node) of a multi-type tree.
  • a first flag eg, mtt_split_cu_flag
  • the image encoding apparatus may perform intra prediction on the current block (S610).
  • the video encoding apparatus determines an intra prediction mode/type for the current block, derives neighboring reference samples of the current block, and then generates prediction samples in the current block based on the intra prediction mode/type and the neighboring reference samples. can do.
  • the procedure of determining the intra prediction mode/type, deriving neighboring reference samples, and generating prediction samples may be simultaneously performed, or one procedure may be performed before the other procedure.
  • the intra prediction unit 265 of the image decoding apparatus may include an intra prediction mode/type determination unit 266, a reference sample derivation unit 267, and a prediction sample derivation unit 268. .
  • the intra prediction mode/type determiner 266 determines an intra prediction mode/type for the current block based on intra prediction mode/type information generated and signaled by the intra prediction mode/type determiner 186 of the image encoding apparatus.
  • the reference sample deriving unit 266 may derive neighboring reference samples of the current block from the reconstructed reference region in the current picture.
  • the prediction sample derivation unit 268 may derive prediction samples of the current block.
  • the intra prediction unit 265 may further include a prediction sample filter unit (not shown).
  • whether the intra prediction mode applied to the current block is among MPM candidates (i.e., is included in the MPM list) or is in the remaining mode may be indicated based on the MPM flag (ex. intra_luma_mpm_flag).
  • a value of 1 of the MPM flag may indicate that the intra prediction mode for the current block is in MPM candidates (MPM list), and a value of 0 of the MPM flag indicates that the intra prediction mode for the current block is in MPM candidates (MPM list). Can indicate none.
  • the apparatus for decoding an image may acquire intra prediction mode information from a bitstream (S1110).
  • the intra prediction mode information may include at least one of an MPM flag, an MPM index, and a remaining intra prediction mode.
  • the intra prediction mode may include two non-directional intra prediction modes and 129 directional intra prediction modes.
  • the non-directional intra prediction modes may include a planar mode and a DC mode, and the directional intra prediction modes may include intra prediction modes 2 to 130.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

L'invention concerne un procédé et un dispositif de codage/décodage d'image. Le procédé de décodage d'image selon la présente invention est un procédé de décodage d'image réalisé par un dispositif de décodage d'image et peut comprendre les étapes consistant à : sur la base d'informations relatives à un mode de prédiction d'un bloc actuel, déterminer si le mode de prédiction du bloc actuel est un mode de prédiction intra ; si le mode de prédiction du bloc actuel est un mode de prédiction intra, déterminer si le bloc actuel est adjacent à la limite d'une région pré-configurée ; selon que le bloc actuel est adjacent à la limite de la région pré-configurée, calculer une ligne d'échantillon de référence du bloc actuel ; et générer un bloc de prédiction du bloc actuel à l'aide de la ligne d'échantillon de référence calculée.
PCT/KR2020/008033 2019-06-20 2020-06-22 Procédé et dispositif pour coder/décoder une image à l'aide de la prédiction intra de ligne de référence multiple et procédé de transmission de flux binaire WO2020256507A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201962864456P 2019-06-20 2019-06-20
US62/864,456 2019-06-20

Publications (1)

Publication Number Publication Date
WO2020256507A1 true WO2020256507A1 (fr) 2020-12-24

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PCT/KR2020/008033 WO2020256507A1 (fr) 2019-06-20 2020-06-22 Procédé et dispositif pour coder/décoder une image à l'aide de la prédiction intra de ligne de référence multiple et procédé de transmission de flux binaire

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WO (1) WO2020256507A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180029905A (ko) * 2016-09-13 2018-03-21 한국전자통신연구원 영상 부호화/복호화 방법, 장치 및 비트스트림을 저장한 기록 매체
KR20180041575A (ko) * 2016-10-14 2018-04-24 세종대학교산학협력단 영상의 부호화/복호화 방법 및 장치
KR20180075660A (ko) * 2015-11-24 2018-07-04 삼성전자주식회사 비디오 복호화 방법 및 그 장치 및 비디오 부호화 방법 및 그 장치
US20180332284A1 (en) * 2017-05-09 2018-11-15 Futurewei Technologies, Inc. Intra-Prediction With Multiple Reference Lines
KR20190028325A (ko) * 2017-09-08 2019-03-18 주식회사 케이티 비디오 신호 처리 방법 및 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180075660A (ko) * 2015-11-24 2018-07-04 삼성전자주식회사 비디오 복호화 방법 및 그 장치 및 비디오 부호화 방법 및 그 장치
KR20180029905A (ko) * 2016-09-13 2018-03-21 한국전자통신연구원 영상 부호화/복호화 방법, 장치 및 비트스트림을 저장한 기록 매체
KR20180041575A (ko) * 2016-10-14 2018-04-24 세종대학교산학협력단 영상의 부호화/복호화 방법 및 장치
US20180332284A1 (en) * 2017-05-09 2018-11-15 Futurewei Technologies, Inc. Intra-Prediction With Multiple Reference Lines
KR20190028325A (ko) * 2017-09-08 2019-03-18 주식회사 케이티 비디오 신호 처리 방법 및 장치

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