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公开(公告)号：US20220174315A1
公开(公告)日：2022-06-02
申请号：US17672880
申请日：2022-02-16
发明人： Geonjung KO , Dongcheol Kim , Juhyung Son , Jaehong Jung , Jinsam Kwak
IPC分类号： H04N19/593 , H04N19/11 , H04N19/136 , H04N19/176
摘要： Disclosed are a video signal processing method and apparatus for encoding or decoding a video signal. In more detail, the video signal processing method includes receiving intra prediction mode information for a current block, wherein the intra prediction mode information indicates one of a plurality of intra prediction modes configuring an intra prediction mode set; and decoding the current block based on the received intra prediction mode information, wherein the intra prediction mode set comprises a plurality of angle modes, and the plurality of angle modes comprises a basic angle mode and an extended angle mode, wherein the extended angle mode is signaled based on the basic angle mode.
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公开(公告)号：US20210400279A1
公开(公告)日：2021-12-23
申请号：US17401849
申请日：2021-08-13
发明人： Geonjung KO , Dongcheol KIM , Juhyung SON , Jaehong JUNG , Jinsam KWAK
IPC分类号： H04N19/132 , H04N19/159 , H04N19/96 , H04N19/70 , H04N19/186 , H04N19/176
摘要： A video signal processing method and device for encoding or decoding a video signal are disclosed. The video signal processing method comprises the steps of: identifying a tree type of a current chroma block; deriving a chroma intra prediction mode of the current chroma block on the basis of a luma intra prediction mode at a preset position if the tree type of the current chroma block is a dual tree; generating a prediction block of the current chroma block on the basis of the chroma intra prediction mode; and restoring the current chroma block by adding a residual block of the current chroma block to a prediction block, wherein the luma intra prediction mode can be set to a preset mode if the luma prediction mode at the preset position is an intra block copy mode.
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公开(公告)号：US20210321136A1
公开(公告)日：2021-10-14
申请号：US17348260
申请日：2021-06-15
发明人： Jaehong JUNG , Juhyung SON , Dongcheol KIM , Geonjung KO , Jinsam KWAK
IPC分类号： H04N19/625 , H04N19/61 , H04N19/70 , H04N19/159 , H04N19/176
摘要： A video signal processing method may comprise the steps of: confirming a prediction mode applied to a current coding unit; confirming whether a plurality of preset conditions are satisfied on the basis of at least one of the prediction mode of the current coding unit and a size of the current coding unit; parsing a first syntax element indicating a transform kernel applied to a transform unit included in the current coding unit when the plurality of preset conditions are satisfied; determining a transform kernel applied to horizontal and vertical directions of the current transform unit on the basis of the first syntax element; and generating a residual signal of the current transform unit by performing an inverse transform on the current transform unit using the determined transform kernel.
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公开(公告)号：US20210314619A1
公开(公告)日：2021-10-07
申请号：US17348227
申请日：2021-06-15
发明人： Jaehong JUNG , Dongcheol KIM , Juhyung SON , Geonjung KO , Jinsam KWAK
IPC分类号： H04N19/61 , H04N19/70 , H04N19/119 , H04N19/159 , H04N19/176
摘要： A video signal processing method may include: a step for determining whether a secondary inverse transform is applied to the current block; a step for deriving a secondary transform kernel set which is applied to the current block from among predefined secondary transform kernel sets on the basis of an intra prediction mode of the current block when the secondary inverse transform is applied to the current block; a step for selecting a secondary transform kernel, which is applied to the current block, in the selected secondary transform kernel set; a step for generating a secondary inverse transformed block by performing a secondary inverse transform on a specified upper-left region of the current block by using the secondary transform kernel; and a step for generating a residual block of the current block by performing a primary inverse transform on the secondary inverse transformed block.
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公开(公告)号：US11140384B2
公开(公告)日：2021-10-05
申请号：US16907081
申请日：2020-06-19
发明人： Geonjung Ko , Juhyung Son , Dongcheol Kim , Jaehong Jung , Jinsam Kwak
IPC分类号： H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
摘要： Disclosed is a video signal processing method and device for encoding or decoding a video signal. More specifically, disclosed are a video signal processing method and a video signal processing device for performing the method, the method comprising: obtaining reference line information indicating a reference line for intra prediction of a current block among a plurality of reference lines comprising neighboring samples of the current block; determining, on the basis of the reference line information, an intra prediction mode for the current block among a plurality of intra prediction modes constituting an intra prediction mode set; and decoding the current block on the basis of a plurality of reference samples on the reference line according to the reference line information and the determined intra prediction mode, wherein the plurality of reference lines include a first reference line comprising neighboring samples on a line adjacent to the boundary of the current block and a second reference line comprising neighboring samples on a line spaced a distance corresponding to a predetermined number of samples apart from the boundary of the current block.
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公开(公告)号：US20210266581A1
公开(公告)日：2021-08-26
申请号：US17317629
申请日：2021-05-11
发明人： Jaehong JUNG , Juhyung SON , Dongcheol KIM , Geonjung KO , Jinsam KWAK
IPC分类号： H04N19/46 , H04N19/119 , H04N19/159 , H04N19/60 , H04N19/176
摘要： A method for processing a video signal comprises the steps of: obtaining, from the video signal, an intra sub-partitions (ISP) mode flag indicating whether the ISP mode is applied to a current block; when the ISP mode is applied to the current block, obtaining, from the video signal, an ISP partitioning flag indicating a partitioning direction of the current block; partitioning the current block into a plurality of transform blocks on the basis of the partitioning direction; generating residual blocks of the transform blocks by performing an inverse transformation on each of the transform blocks; and restoring the current block on the basis of the residual blocks.
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公开(公告)号：US11044470B2
公开(公告)日：2021-06-22
申请号：US17089267
申请日：2020-11-04
发明人： Dongcheol Kim , Geonjung Ko , Jaehong Jung , Juhyung Son , Jinsam Kwak
IPC分类号： H04N19/105 , H04N19/176
摘要： A video signal processing method comprises the steps of: acquiring reference samples on a first side of a current block and reference samples on a second side thereof on the basis of pre-restored samples neighboring the current block; acquiring a direct current (DC) value for a prediction of the current block on the basis of a reference sample set composed of at least some of the reference samples on the first side and the reference samples on the second side, wherein the reference sample set includes the number of reference samples raised to a power of 2, obtained by excluding some of the reference samples on the first side and the reference samples on the second side, if the length of the first side and the length of the second side are different; and restoring the current block on the basis of the DC value.
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公开(公告)号：US20210185358A1
公开(公告)日：2021-06-17
申请号：US17185683
申请日：2021-02-25
发明人： Jaehong Jung , Juhyung SON , Dongcheol KIM , Geonjung KO , Jinsam KWAK
IPC分类号： H04N19/625 , H04N19/61 , H04N19/176 , H04N19/12
摘要： Disclosed is a video signal processing method comprising the steps of: obtaining at least one transform block for a residual signal of a current block from a video signal bitstream; determining, on the basis of length information of a first side of the transform block, a horizontal transform kernel for horizontal transformation of the transform block, regardless of the length of a second side of the transform block, which is orthogonal to the first side; determining, on the basis of length information of the second side, a vertical transform kernel for vertical transformation of the transform block, regardless of the length of the first side; obtaining the residual signal of the current block by performing, on the transform block, inverse transformation using the horizontal transform kernel and the vertical transform kernel; and reconstructing the current block on the basis of the obtained residual signal.
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公开(公告)号：US20210051319A1
公开(公告)日：2021-02-18
申请号：US17089267
申请日：2020-11-04
发明人： Dongcheol KIM , Geonjung KO , Jaehong JUNG , Juhyung SON , Jinsam KWAK
IPC分类号： H04N19/105 , H04N19/176
摘要： A video signal processing method comprises the steps of: acquiring reference samples on a first side of a current block and reference samples on a second side thereof on the basis of pre-restored samples neighboring the current block; acquiring a direct current (DC) value for a prediction of the current block on the basis of a reference sample set composed of at least some of the reference samples on the first side and the reference samples on the second side, wherein the reference sample set includes the number of reference samples raised to a power of 2, obtained by excluding some of the reference samples on the first side and the reference samples on the second side, if the length of the first side and the length of the second side are different; and restoring the current block on the basis of the DC value.
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公开(公告)号：US20200322601A1
公开(公告)日：2020-10-08
申请号：US16907081
申请日：2020-06-19
发明人： Geonjung KO , Juhyung Son , Dongcheol Kim , Jaehong Jung , Jinsam Kwak
IPC分类号： H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
摘要： Disclosed is a video signal processing method and device for encoding or decoding a video signal. More specifically, disclosed are a video signal processing method and a video signal processing device for performing the method, the method comprising: obtaining reference line information indicating a reference line for intra prediction of a current block among a plurality of reference lines comprising neighboring samples of the current block; determining, on the basis of the reference line information, an intra prediction mode for the current block among a plurality of intra prediction modes constituting an intra prediction mode set; and decoding the current block on the basis of a plurality of reference samples on the reference line according to the reference line information and the determined intra prediction mode, wherein the plurality of reference lines include a first reference line comprising neighboring samples on a line adjacent to the boundary of the current block and a second reference line comprising neighboring samples on a line spaced a distance corresponding to a predetermined number of samples apart from the boundary of the current block.
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