公开(公告)号：US20210377560A1

公开(公告)日：2021-12-02

申请号：US17311209

申请日：2019-12-06

申请人： SAMSUNG ELECTRONICS CO., LTD.

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 ,  H04N19/159 ,  H04N19/119 ,  H04N19/139 ,  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.

公开(公告)号：US20210360277A1

公开(公告)日：2021-11-18

申请号：US17284354

申请日：2019-10-10

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Seungsoo JEONG ,  Minwoo PARK ,  Kiho CHOI ,  Anish TAMSE

IPC分类号： H04N19/513 ,  H04N19/109 ,  H04N19/139 ,  H04N19/176 ,  H04N19/91

摘要： Provided is a video decoding method including: generating a merge candidate list including neighboring blocks referred to to predict a motion vector of a current block in a skip mode or a merge mode; when a merge motion vector difference is used according to merge difference mode information indicating whether the merge motion vector difference and a motion vector determined from the merge candidate list are used, determining a base motion vector from a candidate determined among the merge candidate list based on merge candidate information; determining the motion vector of the current block by using the base motion vector and a merge motion vector difference of the current block, the merge motion vector difference being determined by using a distance index and direction index of the merge motion vector difference of the current block; and reconstructing the current block by using the motion vector of the current block.

公开(公告)号：US20210258606A1

公开(公告)日：2021-08-19

申请号：US17228269

申请日：2021-04-12

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Seungsoo JEONG ,  Minwoo PARK ,  Yumi SOHN ,  Kiho CHOI

IPC分类号： H04N19/53 ,  H04N19/109 ,  H04N19/176

摘要： Provided are a video encoding and decoding method and apparatus for obtaining, in a video encoding and decoding process, motion vector resolution information from a bit stream by using a high-level syntax which is a group of information that is applied to a predefined data unit group; determining a motion vector resolution of a current block included in the predefined data unit group based on the motion vector resolution information; determining a prediction motion vector of the current block to be a motion vector of a candidate block from among at least one candidate block, based on the motion vector resolution of the current block; and determining a motion vector of the current block by using the prediction motion vector of the current block.

公开(公告)号：US20210235095A1

公开(公告)日：2021-07-29

申请号：US17051999

申请日：2019-05-10

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Narae CHOI ,  Chanyul KIM ,  Minsoo PARK ,  Minwoo PARK ,  Seungsoo JEONG ,  Kiho CHOI ,  Woongil CHOI ,  Anish TAMSE ,  Yinji PIAO

IPC分类号： H04N19/159 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

摘要： Provided are a video encoding or decoding method and apparatus, which, during video encoding and decoding processes, determine whether an intra prediction mode of the current block is a DC mode, when the intra prediction mode of the current block is the DC mode, in a case where lengths of a height and a width of the current block are the same, determine an average of upper reference samples of the current block and left reference samples of the current block, as a DC value, and in a case where the lengths of the height and the width of the current block are different from each other, determine a weighted average value, which is determined by determining an average of the upper reference samples of the current block as an upper DC value, determine an average of the left reference samples of the current block as a left DC value, and combining the upper value and the left DC value with a predetermined weight, as a DC value, and perform intra prediction on the current block, based on the DC value.

公开(公告)号：US20210152844A1

公开(公告)日：2021-05-20

申请号：US17045376

申请日：2019-04-12

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Seungsoo JEONG ,  Minwoo PARK ,  Anish TAMSE ,  Minsoo PARK ,  Kiho CHOI ,  Yinji PIAO ,  Narae CHOI ,  Woongil CHOI

IPC分类号： H04N19/52 ,  H04N19/176 ,  H04N19/119

摘要： A video decoding method includes: obtaining two or more base motion vectors from an adjacent block of a current block; obtaining correction information for correcting the two or more base motion vectors; determining two or more affine motion vectors by correcting the two or more base motion vectors according to the correction information; obtaining a plurality of affine parameters of the current block according to the two or more affine motion vectors; and predicting the current block according to the plurality of affine parameters.

公开(公告)号：US20210127134A1

公开(公告)日：2021-04-29

申请号：US17054347

申请日：2019-05-10

申请人： SAMSUNG ELECTRONICS CO., LTD.

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 ,  H04N19/44 ,  H04N19/105 ,  H04N19/119

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.

公开(公告)号：US20210105465A1

公开(公告)日：2021-04-08

申请号：US17071600

申请日：2020-10-15

申请人： SAMSUNG ELECTRONICS CO., LTD.

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.

公开(公告)号：US20240187637A1

公开(公告)日：2024-06-06

申请号：US18439221

申请日：2024-02-12

申请人： SAMSUNG ELECTRONICS CO., LTD.

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.

公开(公告)号：US20240107058A1

公开(公告)日：2024-03-28

申请号：US18528154

申请日：2023-12-04

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Seungsoo JEONG ,  Minwoo PARK

IPC分类号： H04N19/523 ,  H04N19/103 ,  H04N19/176 ,  H04N19/513

CPC分类号： H04N19/523 ,  H04N19/103 ,  H04N19/176 ,  H04N19/513

摘要： Provided is a video decoding method including: obtaining, from a sequence parameter set, sequence merge mode with motion vector difference (sequence MMVD) information indicating whether an MMVD mode is applicable in a current sequence; when the MMVD mode is applicable according to the sequence MMVD information, obtaining, from a bitstream, first MMVD information indicating whether the MMVD mode is applied in a first inter prediction mode for a current block included in the current sequence; when the MMVD mode is applicable in the first inter prediction mode according to the first MMVD information, reconstructing a motion vector of the current block which is to be used in the first inter prediction mode, by using a distance of a motion vector difference and a direction of a motion vector difference obtained from the bitstream; and reconstructing the current block by using the motion vector of the current block.

公开(公告)号：US20240073446A1

公开(公告)日：2024-02-29

申请号：US18502696

申请日：2023-11-06

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Seungsoo JEONG ,  Minsoo PARK ,  Minwoo PARK ,  Kiho CHOI ,  Yinji PIAO

IPC分类号： H04N19/56 ,  H04N19/109 ,  H04N19/176

CPC分类号： H04N19/56 ,  H04N19/109 ,  H04N19/176

摘要： Provided is a video decoding method including: determining a prediction mode of a current block to be one of a skip mode and a merge mode; when a motion vector, which is determined from a merge candidate list of the current block, and a merge motion vector difference are to be used, obtaining merge candidate information indicating one candidate in the merge candidate list by performing entropy encoding on a bitstream by applying one piece of context information; determining a base motion vector from one candidate determined from the merge candidate list, based on the merge candidate information; and determining a motion vector of the current block by using a distance index of a merge motion vector difference of the current block and a direction index of the merge motion vector difference to use the base motion vector and the merge motion vector difference.