METHOD FOR PROCESSING IMAGE ON BASIS OF INTRA-PREDICTION MODE AND APPARATUS THEREFOR

    公开(公告)号:US20200077093A1

    公开(公告)日:2020-03-05

    申请号:US16614705

    申请日:2018-05-15

    Abstract: The present invention provides an image processing method on the basis of an intra prediction mode and an apparatus therefor. Specifically, a method for processing an image on the basis of an intra prediction mode may comprise the steps of: inducing a prediction mode applied to an intra prediction of a current block; determining whether a bi-directional intra prediction using reference samples located at both boundaries of the current block with respect to a prediction direction of the prediction mode is applied to the current block; and generating a prediction sample by using a reference sample neighboring the current block on the basis of the prediction mode, wherein when the bi-directional intra prediction is applied, boundary filtering for the current block is skipped.

    METHOD AND APPARATUS FOR BLOCK PARTITIONING AND INTRA PREDICTION IN IMAGE CODING SYSTEM

    公开(公告)号:US20200036985A1

    公开(公告)日:2020-01-30

    申请号:US16337266

    申请日:2017-09-28

    Abstract: An intra prediction method includes: deriving a partitioning structure of a luma block; deriving intra chroma prediction mode information for deriving an intra prediction mode of a chroma block corresponding to the luma block; when the intra chroma prediction mode information indicates a derived mode (DM) or a linear mode (LM), partitioning the chroma block on the basis of the partitioning structure of the luma block so as to derive a plurality of chroma sub-blocks; and generating prediction samples for the plurality of chroma sub-blocks. The method performs illumination compensation-based inter prediction and reduces a boundary error of a block while reducing the amount of data in additional information. The method performs partitioning and intra prediction for a chroma block on the basis of a partitioning structure of a luma block.

    INTRA PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM

    公开(公告)号:US20190273926A1

    公开(公告)日:2019-09-05

    申请号:US16336830

    申请日:2017-08-31

    Abstract: The intra prediction method according to the present invention comprises the steps of: deriving an intra prediction mode of a current block; deriving neighboring reference samples of the current block; and generating a prediction sample of the current block on the basis of linear interpolation of a first neighboring reference sample positioned in the prediction direction of the intra prediction mode, and a second neighboring reference sample positioned in the opposite direction of the prediction direction, among the neighboring reference samples of the current block, wherein the neighboring reference samples include left neighboring reference samples, left upper neighboring reference samples, upper neighboring reference samples, right neighboring reference samples, right lower neighboring reference samples, and lower neighboring reference samples of the current block. The present invention can improve intra prediction performance, and thereby reduce the amount of data required for residual information and increase the overall coding efficiency.

    CHROMA COMPONENT CODING UNIT DIVISION METHOD AND DEVICE

    公开(公告)号:US20190238863A1

    公开(公告)日:2019-08-01

    申请号:US16338583

    申请日:2017-08-14

    CPC classification number: H04N19/176 H04N19/186 H04N19/70

    Abstract: The present invention provides a method for decoding a chroma block of a video signal, comprising the steps of: inducing division information of a luma block, wherein the division information of the luma block includes split depth information of the luma block; parsing depth inheritance information of the chroma block from a video signal, wherein the depth inheritance information indicates the degree of use of the split depth information of the luma block; inducing division information of the chroma block on the basis of the split depth information of the luma block and/or the depth inheritance information, wherein the division information of the chroma block includes split depth information of the chroma block; and decoding the chroma block on the basis of the division information of the chroma block.

    INTER PREDICTION METHOD AND DEVICE IN VIDEO CODING SYSTEM

    公开(公告)号:US20180220149A1

    公开(公告)日:2018-08-02

    申请号:US15750093

    申请日:2016-07-15

    Abstract: A video decoding method performed by a decoding device includes: deriving control points (CPs) for a current block; acquiring motion vectors for the CPs; deriving a sample-unit motion vector in the current block based on the acquired motion vectors; deriving a prediction sample for the current block based on the sample-unit motion vector; and generating a restoration sample based on the prediction sample, wherein coordinates of a bottom-right sample position of the current block are (0, 0), and coordinates of CP0 among the CPs are (0, 0). Inter prediction is effectively performed through sample-unit motion vectors even when an image in a current block is planarly moved and variously changed, and since motion vectors for CPs are derived based on already-decoded neighboring blocks, an amount of information for the motion vectors for the CPs and for a residual signal for the current block is reduced, improving overall coding efficiency.

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