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公开(公告)号：US20240187637A1
公开(公告)日：2024-06-06
申请号：US18439221
申请日：2024-02-12
发明人： Anish TAMSE , Minwoo PARK , Gahyun RYU , Minsoo PARK , Seungsoo JEONG , Kiho CHOI , Narae CHOI , Woongil CHOI , Yinji PIAO
IPC分类号： H04N19/52 , H04N19/119 , H04N19/139 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/527
CPC分类号： H04N19/52 , H04N19/119 , H04N19/139 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/527
摘要： A video decoding method and device for determining whether a prediction mode of a current block is an affine mode; splitting, when the prediction mode of the current block is the affine mode, a luma block of the current block into a plurality of sub luma blocks having a square shape based on a predefined sub block size; determining a mean luma motion vector for four neighboring sub luma blocks among the plurality of sub luma blocks, by using a motion vector of an upper-left sub luma block of the four sub luma blocks and a motion vector of a lower-right sub luma block of the four sub luma blocks; determining the mean luma motion vector to be a motion vector of a current sub chroma block corresponding to the four sub luma blocks; and performing prediction on the current sub chroma block by using the determined motion vector, in a video encoding and decoding process are suggested.
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公开(公告)号：US20230070926A1
公开(公告)日：2023-03-09
申请号：US17986052
申请日：2022-11-14
发明人： Woongil CHOI , Gahyun RYU , Minsoo PARK , Minwoo PARK , Yumi SOHN , Seungsoo JEONG , Narae CHOI , Anish TAMSE
IPC分类号： H04N19/513 , H04N19/109 , H04N19/117 , H04N19/119 , H04N19/139 , H04N19/172 , H04N19/176
摘要： Provided is a video decoding method including: determining whether or not to perform history-based motion vector prediction for inter-prediction of a current block, based on a location of the current block in a tile including a plurality of largest coding units; when it is determined to perform the history-based motion vector prediction on the current block, generating a motion information candidate list including history-based motion vector candidates; determining a motion vector of the current block by using a motion vector predictor determined from the motion information candidate list; and reconstructing the current block by using the motion vector of the current block, wherein, when a motion constraint is applied to a first tile group, when a reference picture of a first tile from among tiles included in the first tile group is a second picture, a motion vector of the first tile is not permitted to indicate a block of the second picture, the block being located outside a second tile group, and when the motion constraint is not applied to the first tile group, the motion vector of the first tile is permitted to indicate the block of the second picture, the block being located outside the second tile group.
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公开(公告)号：US20230054879A1
公开(公告)日：2023-02-23
申请号：US17981040
申请日：2022-11-04
发明人： Minsoo PARK , Gahyun RYU , Minwoo PARK , Seungsoo JEONG , Kiho CHOI , Narae CHOI , Woongil CHOI , Anish TAMSE , Yinji PIAO
IPC分类号： H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/96
摘要： Provided are a method and apparatus, which, during video encoding and decoding processes, obtain chroma intra prediction mode information about a current chroma block, when the chroma intra prediction mode information indicates a direct mode (DM), determine a luma block including a luma sample corresponding to a chroma sample at a lower-right location with respect to a center of the current chroma block, determine a chroma intra prediction mode of the current chroma block based on an intra prediction mode of the determined luma block, and perform intra prediction on the current chroma block, based on the determined chroma intra prediction mode.
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公开(公告)号：US20220248019A1
公开(公告)日：2022-08-04
申请号：US17723229
申请日：2022-04-18
发明人： Narae CHOI , Minwoo PARK
IPC分类号： H04N19/124 , H04N19/176 , H04N19/30 , G06F1/03
摘要： Provided are a video decoding method and apparatus including: in a video encoding and decoding process, determining parity information of a current block based on a width and a height of the current block; determining a lookup table of the current block from among a plurality of predefined lookup tables based on the parity information; determining a dequantization scale value of the current block based on the lookup table of the current block; and performing dequantization on the current block by using the dequantization scale value.
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公开(公告)号：US20220086444A1
公开(公告)日：2022-03-17
申请号：US17532435
申请日：2021-11-22
发明人： Yinji PIAO , Minsoo PARK , Minwoo PARK , Seungsoo JEONG , Kiho CHOI , Narae CHOI , Woongil CHOI , Anish TAMSE
IPC分类号： H04N19/129 , H04N19/96 , H04N19/46 , H04N19/18 , H04N19/176
摘要： An image encoding/decoding method and an apparatus thereof are provided. The decoding method includes: determining a coding unit by splitting an image; determining a transform unit in the coding unit; determining whether to decode residual data of the transform unit according to a transform skip mode; obtaining a significant subgroup flag about a subgroup in the transform unit; based on the significant subgroup flag indicating that the subgroup includes at least one non-zero significant coefficient and scanning information about coefficients of the subgroup, obtaining a first bin about a significant coefficient flag, a sign flag, a first flag, and a parity flag of a coefficient of a scan position; obtaining the residual data including a coefficient in the subgroup based on the base level and a remainder of an absolute value excluding the base level; and obtaining a reconstruction block of the coding unit, based on the residual data.
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公开(公告)号：US20220078409A1
公开(公告)日：2022-03-10
申请号：US17526317
申请日：2021-11-15
发明人： Seungsoo JEONG , Minsoo PARK , Minwoo PARK , Woongil CHOI , Anish TAMSE , Kiho CHOI , Narae CHOI , Yinji PIAO
IPC分类号： H04N19/105 , H04N19/132 , H04N19/117 , H04N19/82 , H04N19/176
摘要： An image decoding method includes: comparing a size of a current image including a current block with a size of a reference image; selecting, in the reference image, reference samples corresponding to current samples in the current block according to a motion vector of the current block; and reconstructing the current block based on the reference samples, wherein, when the size of the reference image is greater than the size of the current image, the reference samples are spaced apart from one another in the reference image by an interval corresponding to a result of the size comparison.
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公开(公告)号：US20210392330A1
公开(公告)日：2021-12-16
申请号：US17285763
申请日：2019-10-18
发明人： Yinji PIAO , Kiho CHOI , Minsoo PARK , Minwoo PARK , Seungsoo JEONG , Narae CHOI , Woongil CHOI , Anish TAMSE
IPC分类号： H04N19/13 , H04N19/91 , H04N19/30 , H04N19/174
摘要： Provided is an entropy decoding method including: determining a plurality of scaling factors for updating an occurrence probability of a certain binary value for a current encoding symbol; performing arithmetic coding on a binary value of the current encoding symbol, based on the occurrence probability of the certain binary value; and updating the occurrence probability of the certain binary value by using at least one scaling factor of the plurality of scaling factors, according to the binary value of the current encoding symbol.
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公开(公告)号：US20210281834A1
公开(公告)日：2021-09-09
申请号：US17259455
申请日：2019-07-11
发明人： Narae CHOI , Minsoo PARK , Minwoo PARK , Seungsoo JEONG , Kiho CHOI , Woongil CHOI , Anish TAMSE , Yinji PIAO
IPC分类号： H04N19/105 , H04N19/176 , H04N19/186 , H04N19/593
摘要： Provided are a video decoding method and apparatus which, during video encoding and decoding processes, determine whether a current block is in contact with an upper boundary of a largest coding unit including the current block, when it is determined that the current block is in contact with the upper boundary of the largest coding unit, determine an upper reference line of the current block as one reference line, when it is determined that the current block is not in contact with the upper boundary of the largest coding unit, determine the upper reference line of the current block based on N reference lines, and use the determined upper reference line.
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公开(公告)号：US20210218964A1
公开(公告)日：2021-07-15
申请号：US17052573
申请日：2019-05-10
发明人： Minsoo PARK , Chanyul KIM , Minwoo PARK , Seungsoo JEONG , Kiho CHOI , Narae CHOI , Woongil CHOI , Anish TAMSE , Yin-ji PIAO
IPC分类号： H04N19/119 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/60 , H04N19/103
摘要： Provided is an image decoding method including: determining a first coding block and a second coding block corresponding to the first coding block; when a size of the first coding block is equal to or smaller than a preset size, obtaining first split shape mode information and second split shape mode information from a bitstream; determining a split mode of the first coding block, based on the first split shape mode information, and determining a split mode of the second coding block, based on the second split shape mode information; and decoding a coding block of a first color component which is determined based on the split mode of the first coding block and a coding block of a second color component which is determined based on the split mode of the second coding block.
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公开(公告)号：US20210105464A1
公开(公告)日：2021-04-08
申请号：US16970179
申请日：2019-03-07
发明人： Narae CHOI , Bora JIN , Yinji PIAO , Minwoo PARK
IPC分类号： H04N19/11 , H04N19/176 , H04N19/119
摘要： Provided are a video decoding method and a video decoding device, which, during video encoding and decoding processes, obtain most probable mode (MPM) information indicating whether to use MPMs of a current block determined based on at least two of a prediction mode of a left neighboring block adjacent to a left side of the current block, a prediction mode of an upper neighboring block adjacent to an upper side of the current block, and a right neighboring block adjacent to a right side of the current block, obtain extended intra mode set information indicating whether to use an extended intra mode set configured based on the MPMs, and determine an intra prediction mode of the current block based on the MPM information and the extended intra mode set information.
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