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WO2018074616A1 - Procédé et appareil de codage vidéo utilisant une liste de candidats skip correspondant à une partition de bloc - Google Patents

Procédé et appareil de codage vidéo utilisant une liste de candidats skip correspondant à une partition de bloc Download PDF

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Publication number
WO2018074616A1
WO2018074616A1 PCT/KR2016/011658 KR2016011658W WO2018074616A1 WO 2018074616 A1 WO2018074616 A1 WO 2018074616A1 KR 2016011658 W KR2016011658 W KR 2016011658W WO 2018074616 A1 WO2018074616 A1 WO 2018074616A1
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WIPO (PCT)
Prior art keywords
skip candidate
motion information
block
candidate list
skip
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Ceased
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PCT/KR2016/011658
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English (en)
Korean (ko)
Inventor
류호찬
안용조
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DigitalInsights Inc
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DigitalInsights Inc
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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
    • H04N19/132—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
    • H04N19/102—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
    • H04N19/136—Incoming video signal characteristics or properties
    • H04N19/137—Motion inside a coding unit, e.g. average field, frame or block difference
    • H04N19/139—Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
    • 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
    • H04N19/503—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

Definitions

  • the present invention relates to an image processing technique, and more particularly, to a method and apparatus for modifying a SKIP candidate list for block division in a video compression technique.
  • a block division structure refers to a unit for encoding and decoding, and a unit to which encoding and decoding main technologies such as prediction and transformation are applied.
  • the size of a block for encoding and decoding is gradually increasing, and the partition type of the block supports more various partition types.
  • video compression is performed using not only a unit for encoding and decoding but also a unit subdivided according to a role of a block.
  • video encoding and decoding are performed by using a block partition structure of a quad-tree type and a unit block divided according to a role for prediction and transformation.
  • block partitioning structures such as Quad-Tree plus Binary-Tree (QTBT) combining a quad-tree and a binary-tree, an arbitrary block partitioning structure, and the like, have been proposed for improving video encoding efficiency.
  • QTBT Quad-Tree plus Binary-Tree
  • block structures having various block depths from block sizes such as 128x128 and 256x256 to 8x8 block sizes
  • the number of bits used to express block partitioning structures of various sizes and shapes or to express a plurality of block informations is greatly increased.
  • An object of the present invention is to provide a method and apparatus for improving coding efficiency compared to a conventional video compression technology by removing redundant motion information from a SKIP candidate list in a divided block.
  • a video coding method and apparatus may include a generator for generating SKIP candidate motion information according to a SKIP candidate addition order, and determining whether to add the obtained motion information to a SKIP candidate list.
  • the determination unit may include adding the obtained motion information to the SKIP candidate list if it is true.
  • a video coding method and apparatus may include a converging unit for acquiring motion information from spatially and temporally adjacent coding blocks and subblocks according to a predefined SKIP candidate addition order. And a determination unit for determining whether the information is eligible for SKIP candidates, and a determination unit for determining whether the motion information matches the motion information of the currently configured SKIP candidate list.
  • a video coding method and apparatus belong to the same block before being divided with the current coding block with respect to a spatially adjacent coding block, and have the same coding block depth as the current coding block, In the case of a block coded in a SKIP mode, motion information on the spatially adjacent coded block is not added to a SKIP candidate.
  • a video coding method and apparatus include a motion added to a SKIP candidate list even when motion information not added by the SKIP candidate eligibility determination is not the same merge region (MER). This includes examining redundancy with the information.
  • the present invention provides a video coding method using a block structure of various sizes and shapes, and a video coding method for improving coding efficiency by removing redundant motion information from a SKIP candidate list when a split coding block is selected as a SKIP mode. It is an object to provide a device.
  • encoding performance when the non-square coding block is in the SKIP mode, encoding performance may be improved by encoding by removing motion information overlapping with an adjacent block from the SKIP candidate list.
  • FIG. 1 is a block diagram illustrating a configuration of a video encoding apparatus according to an embodiment of the present invention.
  • FIG. 2 is a block diagram illustrating a configuration of a video decoding apparatus according to an embodiment of the present invention.
  • FIG. 3 is a conceptual diagram illustrating a block in which various types of block divisions and various types of block divisions are combined according to an embodiment of the present invention.
  • FIG. 4 illustrates an example of generating an existing SKIP candidate list according to an embodiment of the present invention.
  • FIG. 5 is a conceptual diagram illustrating a SKIP candidate list in left and right partitioned blocks according to an embodiment of the present invention.
  • FIG. 6 illustrates a conceptual diagram of SKIP candidate list generation in blocks divided up and down according to an embodiment of the present invention.
  • FIG. 7 illustrates a conceptual diagram of redundancy removal of a SKIP candidate list in a divided block according to an embodiment of the present invention.
  • ⁇ to '' or ⁇ of '' does not mean a step for.
  • first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.
  • each component shown in the embodiments of the present invention are shown independently to represent different characteristic functions, and do not mean that each component is composed of separate hardware or one software unit. That is, each component is described by listing each component for convenience of description, and at least two of the components may be combined to form one component, or one component may be divided into a plurality of components to perform a function. The integrated and separated embodiments of each of these components are also included within the scope of the present invention without departing from the spirit of the invention.
  • the coding block or coding unit may be referred to generically including a single block or unit in which encoding and decoding are performed in video coding.
  • a divided block refers to a block in which one block is divided and thus encoding and decoding are performed separately, and two or more split coding blocks may be collectively referred to.
  • FIG. 7 illustrates a conceptual diagram of redundancy removal of a SKIP candidate list in a divided block according to an embodiment of the present invention.
  • a video coding method and apparatus includes removing duplicate motion information of a SKIP candidate list from a divided block.
  • the current coding block 711 illustrated in FIG. 7 is a block divided together with the left block 710, and the two coding blocks 711 and 710 have the same coding block depth.
  • the motion information 712 of the SKIP block 710 having a spatially adjacent and the same coding block depth is added to the SKIP candidate list of the current coding block according to the embodiment of the present invention. If not, or if two coding blocks 711 and 710 belong to the same merge region (MER) and are not added to the SKIP candidate list, the redundancy check may be performed for the motion information 712.
  • MER merge region
  • FIG. 7 shows a spatially adjacent, and movement of the SKIP block 710 that has the same coding block depth information 712 and the spatially adjacent block in the motion information of the B 1 is equal to .
  • the motion information B1 is removed from the SKIP candidate list of the current coding block.
  • ⁇ to '' or ⁇ of '' does not mean a step for.
  • first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.
  • each component shown in the embodiments of the present invention are shown independently to represent different characteristic functions, and do not mean that each component is composed of separate hardware or one software unit. That is, each component is described by listing each component for convenience of description, and at least two of the components may be combined to form one component, or one component may be divided into a plurality of components to perform a function. The integrated and separated embodiments of each of these components are also included within the scope of the present invention without departing from the spirit of the invention.
  • the coding block or coding unit may be referred to generically including a single block or unit in which encoding and decoding are performed in video coding.
  • a divided block refers to a block in which one block is divided and thus encoding and decoding are performed separately, and two or more split coding blocks may be collectively referred to.
  • FIG. 1 is a block diagram illustrating a configuration of a video encoding method and apparatus according to an embodiment of the present invention.
  • the video encoding method and apparatus may include an inter prediction unit 120, an intra prediction unit 125, a subtraction unit 130, a transform unit 140, a quantization unit 150, and an entropy encoding unit 160. ), An inverse transform unit 145, an inverse quantization unit 155, an adder 135, an in-loop filter unit 180, and a reconstructed picture buffer 190.
  • the inter prediction unit 120 generates a prediction signal by performing motion prediction using the reconstructed image stored in the input image 110 and the reconstructed picture buffer 190.
  • the intra prediction unit 125 generates a prediction signal by performing spatial prediction using pixel values of pre-restored neighboring blocks adjacent to the current block to be encoded.
  • the subtractor 130 generates a residual signal using the prediction signal generated by the input image and the inter-prediction unit 120 or the intra prediction unit 125.
  • the transformer 140 and the quantizer 150 generate quantized coefficients by performing transform and quantization on the residual signal generated by the subtractor 130.
  • the entropy encoder 160 outputs a bitstream by performing entropy encoding on encoding information such as syntax elements and quantized coefficients defined in the video encoder.
  • the inverse transformer 145 and the inverse quantizer 155 receive the quantization coefficients, perform inverse quantization and inverse transformation in order, and generate a reconstructed residual signal.
  • the adder 135 generates a reconstruction signal by using the prediction signal generated by the inter prediction unit 120 or the intra prediction unit 125 and the reconstructed residual signal.
  • the reconstruction signal is transmitted to the in-loop filter unit 180.
  • the reconstructed picture to which the filtering is applied is stored in the reconstructed picture buffer 190 and may be used as a reference picture in the inter prediction unit 120.
  • FIG. 2 is a block diagram showing the configuration of a video decoding apparatus and method according to an embodiment of the present invention.
  • the video decoding apparatus and method may include an entropy decoder 210, an inverse quantizer 220, an inverse transformer 230, an intra prediction unit 240, an inter prediction unit 250, and an adder ( 260, an in-loop filter unit 270, and a reconstructed picture buffer 280.
  • the entropy decoder 210 decodes the input bitstream 200 and outputs decoding information such as syntax elements and quantized coefficients.
  • the inverse quantization unit 220 and the inverse transform unit 230 receive the quantization coefficients, perform inverse quantization and inverse transformation in order, and output a residual signal.
  • the intra prediction unit 240 generates a prediction signal by performing spatial prediction using pixel values of the pre-decoded neighboring block adjacent to the current block to be decoded.
  • the inter prediction unit 250 generates a prediction signal by performing motion compensation using the motion vector extracted from the bitstream and the reconstructed image stored in the reconstructed picture buffer 280.
  • the prediction signals output from the intra prediction unit 240 and the intra prediction unit 250 are combined with the residual signal through the adder 260, and thus the reconstruction signal generated in units of blocks includes a reconstructed image. .
  • the reconstructed image is transmitted to the in-loop filter unit 270.
  • the reconstructed picture to which the filtering is applied is stored in the reconstructed picture buffer 280 and may be used as a reference picture in the inter prediction unit 250.
  • FIG. 3 is a conceptual diagram illustrating a block in which various types of block divisions and various types of block divisions are combined according to an embodiment of the present invention.
  • a video coding method and apparatus using a combination of various block divisions include an undivided block 310, a horizontal partitioned block 320, a vertical partitioned block 330, and a 4-divided block. It includes a block partition type including a block 340, and includes a block structure 350 of the various block partitions combined.
  • the undivided block 310 includes a form in which one coding block is not divided.
  • one coding block is divided in a horizontal direction. Includes divided into forms.
  • the vertically divided block 330 includes a form in which one coding block is divided in a vertical direction, and the four-divided block 340 has one coding block in a vertical direction. It includes a divided form in the horizontal direction.
  • the one coding block includes both a square block and a non-square block.
  • the block structure 350 in which the various block divisions are combined includes a block structure in which the various block divisions 310, 320, 330, and 340 are combined. do.
  • the top block 350 is divided into four parts, and thus, the first block 350 is divided into a first partition block 351, a second partition block 352, a third partition block 353, and a fourth partition block 354. Can be divided.
  • the first partition block 351 is a block partitioned form of the block 310 that is not divided
  • the second partitioned block 352 is a block 340 that is divided into four sections. Is a block expressed in the form of block partitioning.
  • the one coding block may be divided into one or more blocks, and the divided lower blocks may also repeatedly perform block division.
  • the second dividing block 352 is divided into four to generate four sub dividing blocks, and each sub dividing block represents blocks represented by block dividing of the block 310 of the non-dividing type.
  • the third dividing block 353 is a block represented by the block dividing of the block 320 divided into the horizontal direction, and the lower rectangular block 356 of the lower dividing block is divided into the vertical direction. Is a block represented by block division of block 330.
  • the fourth dividing block 354 is a block represented by a block dividing form of the four-divided block 340, and the first sub dividing block and the third sub dividing block of the fourth dividing block further include the vertical direction.
  • the third lower partition block represents an embodiment in which additional vertical division is performed.
  • FIG. 4 illustrates an example of generating an existing SKIP candidate list according to an embodiment of the present invention.
  • An existing video coding method and apparatus include generating a SKIP candidate list and encoding and decoding index information representing one of the SKIP presence information and the SKIP candidate list using the SKIP candidate list.
  • a series of motion information such as motion vectors, prediction directions, and reference picture information of blocks C3 and H that are temporally adjacent to the spatially adjacent blocks A0, A1, B0, B1, and B2 of the current coding block. Can be used as is.
  • the present invention includes using the motion information existing in the temporally adjacent coding block 420 and the motion information generated using the spatially adjacent blocks with the temporally adjacent coding block 420 as SKIP candidates. .
  • the SKIP candidate list 440 is generated according to a predefined SKIP candidate addition order 430 and a predefined maximum number of SKIP candidates.
  • the motion information may be sequentially added to the SKIP candidate list according to the predefined SKIP candidate addition order 430, and duplicate motion information may be removed in the process of adding the motion information.
  • the number of spatial SKIP candidates and temporal SKIP candidates may be defined in advance, and FIG. 4 illustrates an example of using four spatial SKIP candidates and one temporal SKIP candidate.
  • FIG. 4 illustrates an example of using four spatial SKIP candidates and one temporal SKIP candidate.
  • the present invention only the number of candidates according to the example shown in FIG. 4 is not limited to the scope of the present invention, which includes the definition of the number of predefined SKIP candidate lists.
  • FIG. 5 is a conceptual diagram illustrating a SKIP candidate list in left and right partitioned blocks according to an embodiment of the present invention.
  • a video coding method and apparatus includes generating and modifying a SKIP candidate list in left and right divided blocks.
  • the current coding block 511 illustrated in FIG. 5 is a block divided together with the left block 510, and the two coding blocks 510 and 511 have the same coding block depth.
  • the present invention includes generating the SKIP candidate list and selecting one of the SKIP candidates when the current coding block 511 is in the SKIP mode in encoding and decoding the current coding block 511.
  • generating the SKIP candidate list generating the SKIP candidate list 530 according to the predefined SKIP candidate addition order.
  • the current coding block 511 and the left block 510 has the same coding block depth and the left block 510 is in the SKIP mode
  • the motion information of the left block 510 among the SKIP candidates of the current block 511 is not added to the SKIP mode. Therefore, in the SKIP candidate list generation process of the present invention, the addition of the motion information of A 1 corresponding to the left block 510 is omitted in the process of generating the SKIP candidate list for the current coding block according to the SKIP candidate addition order. It includes.
  • FIG. 6 illustrates a conceptual diagram of SKIP candidate list generation in blocks divided up and down according to an embodiment of the present invention.
  • a video coding method and apparatus includes generating and modifying a SKIP candidate list in blocks divided up and down.
  • the current coding block 611 illustrated in FIG. 6 is a block divided together with the upper block 610, and the two coding blocks 610 and 611 have an example having the same coding block depth.
  • the present invention includes generating the SKIP candidate list and selecting one of the SKIP candidates when the current coding block 611 is in the SKIP mode in encoding and decoding the current coding block 611.
  • generating the SKIP candidate list generating the SKIP candidate list 630 according to the predefined SKIP candidate addition order.

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  • Multimedia (AREA)
  • Signal Processing (AREA)
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Abstract

La présente invention concerne un procédé et un appareil, parmi les schémas de codage vidéo, pour générer et modifier une liste de candidats SKIP à partir d'un bloc partitionné. Le procédé comprend les étapes consistant à : générer des données de mouvement de candidats SKIP selon l'ordre d'ajout de candidats SKIP ; déterminer l'opportunité d'ajouter les données de mouvement acquises à une liste de candidats SKIP ; et, si l'opportunité d'ajout à la liste de candidats SKIP est déterminée, ajouter les données de mouvement acquises à la liste de candidats SKIP.
PCT/KR2016/011658 2016-10-17 2016-10-18 Procédé et appareil de codage vidéo utilisant une liste de candidats skip correspondant à une partition de bloc Ceased WO2018074616A1 (fr)

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KR1020160134039A KR20180041831A (ko) 2016-10-17 2016-10-17 블록 분할에 따른 skip 후보 리스트를 사용하는 비디오 코딩 방법 및 장치
KR10-2016-0134039 2016-10-17

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Cited By (1)

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CN110958452A (zh) * 2018-09-27 2020-04-03 华为技术有限公司 视频解码方法及视频解码器

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KR20140097997A (ko) * 2013-01-29 2014-08-07 세종대학교산학협력단 움직임 정보 부호화/복호화 장치 및 움직임 정보를 부호화/복호화하는 방법
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110958452A (zh) * 2018-09-27 2020-04-03 华为技术有限公司 视频解码方法及视频解码器
CN110958452B (zh) * 2018-09-27 2023-11-03 华为技术有限公司 视频解码方法及视频解码器

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