IMAGE ENCODING/DECODING METHOD AND DEVICE THEREFOR

    公开(公告)号:US20210105477A1

    公开(公告)日:2021-04-08

    申请号:US16605094

    申请日:2018-03-13

    Abstract: Disclosed are an image encoding/decoding method and a device therefor. Specifically, an image encoding method may comprise the steps of: generating a quantized transform block by performing transform and quantization on a residual signal of a current block; splitting the quantized transform block into a plurality of coefficient groups; determining a first scan order representing the scan order among the coefficients of the coefficient groups; and entropy encoding the coefficients of the quantized transform block according to the first scan order, and a second scan order representing the scan order among the plurality of coefficient groups.

    METHOD AND APPARATUS FOR PROCESSING IMAGE SIGNAL

    公开(公告)号:US20200374554A1

    公开(公告)日:2020-11-26

    申请号:US16899910

    申请日:2020-06-12

    Abstract: Embodiments of the present disclosure provide a method and device for processing a video signal. A method for decoding an image signal according to an embodiment of the present disclosure comprises the steps of: determining a non-separable transform set index indicating a non-separable transform set used for a non-separable transform of a current block from among non-separable transform sets predefined on the basis of an intra-prediction mode of the current block; determining. as a non-separable transform matrix, a transform kernel indicated by a non-separable transform index for the current block from among transform kernels included in the non-separable transform set indicated by the non-separable transform set index; and applying the non-separable transform matrix to an upper left region which of the current block, which is determined according to the width and height of the current block, wherein each of the predefined non-separable transform sets includes two transform kernels.

    METHOD AND DEVICE FOR PERFORMING TRANSFORM USING LAYERED GIVENS TRANSFORM

    公开(公告)号:US20200221130A1

    公开(公告)日:2020-07-09

    申请号:US16643786

    申请日:2018-09-03

    Inventor: Moonmo KOO

    Abstract: Disclosed herein is a method for performing decoding using a Layered Givens Transform (LGT), which includes: deriving a plurality of rotation layers and at least one permutation layer, wherein the rotation layer includes a permutation matrix and a rotation matrix, and the rotation matrix includes at least one pairwise rotation matrix; acquiring an LGT coefficient using the plurality of rotation layers and the at least one permutation layer; and performing inverse transform using the LGT coefficient, in which the rotation layer may be derived based on edge information indicating a pair to which the at least one pairwise rotation matrix is applied.

    METHOD AND DEVICE FOR CHROMA SAMPLE INTRA PREDICTION IN VIDEO CODING SYSTEM

    公开(公告)号:US20180241995A1

    公开(公告)日:2018-08-23

    申请号:US15755037

    申请日:2016-08-25

    Abstract: An intra prediction method according to the present invention comprises the steps of: acquiring information on a luma prediction mode of a current block and information on a chroma prediction mode of the current block from a bit stream; deriving a luma intra prediction mode of the current block on the basis of the information on the luma prediction mode; determining a chroma intra prediction mode of the current block on the basis of information on the luma intra prediction mode and the information on the chroma prediction mode; and generating a chroma prediction sample of the current block on the basis of the chroma intra prediction mode. According to the present invention, it is possible to reflect the difference between the ratio of the width to the height of a luma component and the ratio of the width to the height of a chroma component, and thus to more accurately perform intra prediction in units of samples and improve intra prediction performance.

    METHOD FOR ENCODING/DECODING IMAGE ON BASIS OF POLYGON UNIT AND APPARATUS THEREFOR
    200.
    发明申请
    METHOD FOR ENCODING/DECODING IMAGE ON BASIS OF POLYGON UNIT AND APPARATUS THEREFOR 审中-公开
    基于聚合单元编码/解码图像的方法及其设备

    公开(公告)号:US20170019669A1

    公开(公告)日:2017-01-19

    申请号:US15123930

    申请日:2015-03-05

    Abstract: The present invention relates to a method for encoding/decoding a still image or a video based on a polygon unit and an apparatus for supporting the same. Particularly, a method for encoding an image based on a polygon unit may include partitioning an input image by a unit of block, determining a position of at least one point within the block, determining a position of at least one point in each side of the block, partitioning the block into at least one polygon unit using a vertex of the block, at least two points among the points determined in the side of the block, and a point determined within the block and coding the input image by a unit of the polygon unit.

    Abstract translation: 本发明涉及一种用于对基于多边形单元的静止图像或视频进行编码/解码的方法及其装置。 特别地,用于基于多边形单元对图像进行编码的方法可以包括以块为单位划分输入图像,确定块内的至少一个点的位置,确定块的每一侧中的至少一个点的位置 块,使用块的顶点将块划分为至少一个多边形单元,在块的侧面中确定的点中的至少两个点以及在该块内确定的点,并以该单元对该输入图像进行编码 多边形单位。

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