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公开(公告)号：US20220295052A1
公开(公告)日：2022-09-15
申请号：US17827239
申请日：2022-05-27
发明人： Narae CHOI , Minwoo PARK , Chanyul KIM , Minsoo PARK , Yumi SOHN , Seungsoo JEONG , Kiho CHOI , Woongil CHOI , Anish TAMSE , Yinji PIAO
IPC分类号： H04N19/11 , H04N19/176
摘要： Provided are a video decoding method and apparatus and a video encoding method and apparatus which determine whether to use a Most Probable Mode (MPM) list, based on encoding information of a current block, obtain, from a bitstream, intra prediction mode index information indicating one of candidate intra prediction modes included in the MPM list, and determine an intra prediction mode of the current block by using the obtained intra prediction mode index information.
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公开(公告)号：US20220232210A1
公开(公告)日：2022-07-21
申请号：US17712714
申请日：2022-04-04
发明人： Narae CHOI , Minsoo Park , Minwoo Park , Seungsoo Jeong , Kiho Choi , Woongil Choi , Anish Tamse , Yinji Piao
IPC分类号： H04N19/11 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
摘要： Provided are video encoding/decoding methods and apparatuses for determining an intra prediction mode of a current block, based on a width and height of the current block. When the current block has a square shape in which the width and height are equal, the intra prediction mode of the current block is determined from among first intra prediction mode candidates including a plurality of predetermined intra prediction directions, and when the current block has a non-square shape in which the width and height are not equal, the intra prediction mode of the current block is determined from among second intra prediction mode candidates configured based on the non-square shape.
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公开(公告)号：US20220109833A1
公开(公告)日：2022-04-07
申请号：US17551483
申请日：2021-12-15
发明人： Narae CHOI , Minwoo Park , Minsoo Park
IPC分类号： H04N19/117 , H04N19/176 , H04N19/132 , H04N19/196 , H04N19/61 , H04N19/159 , H04N19/82 , H04N19/107 , H04N19/503 , H04N19/593
摘要： Provided is a video decoding method including: obtaining constrained prediction information indicating whether a constrained intra prediction mode is enabled; generating reconstructed samples of a current block by using prediction samples of the current block and residual samples of the current block; when the constrained intra prediction mode is enabled by the constrained prediction information and a prediction mode of a neighboring block is not an intra prediction mode, determining a padding value corresponding to a neighboring sample adjacent to outside of a boundary between the current block and the neighboring block, by using the reconstructed samples of the current block; and performing post-reconstruction filtering on the current block, by using the padding value corresponding to the neighboring sample.
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公开(公告)号：US20220014730A1
公开(公告)日：2022-01-13
申请号：US17294164
申请日：2019-11-15
发明人： Seungsoo JEONG , Gahyun RYU , Minsoo Park , Minwoo PARK , Kiho CHOI , Narae CHOI , Woongil CHOI , Anish TAMSE , Yinji PIAO
IPC分类号： H04N19/105 , H04N19/91 , H04N19/159 , H04N19/177 , H04N19/176
摘要： Disclosed is an image decoding method according to an embodiment, the image decoding method including: obtaining a first reference block and a second reference block, for bi-directional prediction of a current block; obtaining, from a bitstream, weight information for combining the first reference block with the second reference block; performing entropy decoding on the weight information to obtain a weight index; combining the first reference block with the second reference block according to a candidate value indicated by the weight index among candidate values included in a weight candidate group; and reconstructing the current block based on a result of the combining, wherein a first binary value corresponding to the weight index is entropy-decoded based on a context model, and the remaining binary value corresponding to the weight index is entropy-decoded by a bypass method.
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公开(公告)号：US20210266557A1
公开(公告)日：2021-08-26
申请号：US17251305
申请日：2019-06-11
发明人： Narae CHOI , Minwoo PARK , Minsoo PARK , Seungsoo JEONG , Kiho CHOI , Woongil CHOI , Anish TAMSE , Yinji PIAO
IPC分类号： H04N19/132 , H04N19/105 , H04N19/80 , H04N19/159 , H04N19/46 , H04N19/176
摘要： Provided is a video decoding method including: obtaining, from a bitstream, intra prediction mode information indicating an intra prediction mode of a current block; determining an interpolation filter set to be used in prediction of the current block, based on at least one of a size of the current block and the intra prediction mode indicated by the intra prediction mode information; determining a reference location to which a current sample of the current block refers according to the intra prediction mode; determining, in the interpolation filter set, an interpolation filter that corresponds to the reference location; determining a prediction value of the current sample, according to reference samples of the current block and the interpolation filter; and reconstructing the current block, based on the prediction value of the current sample.
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公开(公告)号：US20230047368A1
公开(公告)日：2023-02-16
申请号：US17980986
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 , H04N19/96 , H04N19/186 , H04N19/176 , H04N19/159
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：US20230043259A1
公开(公告)日：2023-02-09
申请号：US17962221
申请日：2022-10-07
发明人： Seungsoo JEONG , Chanyul KIM , Minsoo PARK , Minwoo PARK , Kiho CHOI , Narae CHOI , Woongil CHOI , Anish TAMSE , Yinji PIAO
IPC分类号： H04N19/577 , H04N19/105 , H04N19/119 , H04N19/44
摘要： A video decoding method includes determining, based on an area of a current block, whether a multi-prediction combination mode for predicting the current block by combining prediction results obtained according to a plurality of prediction modes is applied to the current block, when the multi-prediction combination mode is applied to the current block, determining the plurality of prediction modes to be applied to the current block, generating a plurality of prediction blocks of the current block, according to the plurality of prediction modes, and determining a combined prediction block of the current block, by combining the plurality of prediction blocks according to respective weights.
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公开(公告)号：US20220132145A1
公开(公告)日：2022-04-28
申请号：US17573181
申请日：2022-01-11
发明人： Woongil CHOI , Minsoo PARK , Minwoo PARK , Seungsoo JEONG , Kiho CHOI , Narae CHOI , Anish TAMSE , Yinji PIAO
IPC分类号： H04N19/174 , H04N19/176 , H04N19/60 , H04N19/117 , H04N19/82
摘要： In a video encoding and decoding process, provided are a method and apparatus for determining whether a slice including an adjacent pixel located at the upper-left or lower-right side of a current pixel from among adjacent pixels used for an adaptive loop filter of the current pixel is different from a slice including the current pixel, when the slice including the adjacent pixel at the upper-left or lower-right location is different from the slice including the current pixel, determining a value of the adjacent pixel located at the upper-left or lower-right side as a value of a closest pixel in a horizontal direction of the adjacent pixel located at the upper-left or lower-right side from among pixels included in the slice including the current pixel, determining an adaptive loop filter including a filter coefficient for the current pixel and the adjacent pixels based on values of the current pixel and the adjacent pixels, correcting the value of the current pixel by using the values of the adjacent pixels, by applying the adaptive loop filter to the current pixel, and encoding/decoding a current block including the current pixel.
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公开(公告)号：US20220078451A1
公开(公告)日：2022-03-10
申请号：US17299193
申请日：2019-12-09
发明人： Woongil CHOI , Gahyun RYU , Minsoo PARK , Minwoo PARK , Seungsoo JEONG , Kwangpyo CHOI , Kiho CHOI , Narae CHOI , Anish TAMSE , Yinji PIAO
IPC分类号： H04N19/174 , H04N19/119 , H04N19/70 , H04N19/172 , H04N19/105
摘要： Provided is a video decoding method including obtaining identification information of a first tile and identification information of a last tile from a bitstream, wherein the first and last tiles are included in a first slice, determining an index difference between the first tile and the last tile, based on a result of comparing the identification information of the first tile with the identification information of the last tile, determining the number of tiles included in the first slice, by using the index difference between the first tile and the last tile, and decoding a plurality of tiles included in the first slice according to an encoding order by using the number of tiles included in the first slice, the identification information of the first tile, and the identification information of the last tile.
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公开(公告)号：US20220014748A1
公开(公告)日：2022-01-13
申请号：US17293351
申请日：2019-11-12
发明人： Yinji PIAO , Gahyun RYU , Minsoo PARK , Minwoo PARK , Seungsoo JEONG , Kiho CHOI , Narae CHOI , Woongil CHOI , Anish TAMSE
摘要： Provided is a method of decoding coefficients included in image data, the method including determining a Rice parameter for a current coefficient, based on a base level of the current coefficient; parsing coefficient level information indicating a size of the current coefficient from a bitstream by using the determined Rice parameter; and identifying the size of the current coefficient by de-binarizing the coefficient level information by using the determined Rice parameter.
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