公开(公告)号：US20220303551A1

公开(公告)日：2022-09-22

申请号：US17835553

申请日：2022-06-08

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 ,  H04N19/593

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：US20220295051A1

公开(公告)日：2022-09-15

申请号：US17827172

申请日：2022-05-27

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：US20220295050A1

公开(公告)日：2022-09-15

申请号：US17827058

申请日：2022-05-27

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：US20220116613A1

公开(公告)日：2022-04-14

申请号：US17555943

申请日：2021-12-20

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Narae CHOI ,  Minwoo PARK

IPC分类号： H04N19/132 ,  H04N19/105 ,  H04N19/117 ,  H04N19/82 ,  H04N19/159 ,  H04N19/176

摘要： The present disclosure relates to apparatus and methods of image decoding and image encoding. In one or more embodiments, an image decoding method may comprise determining a first sample value of an upper left reference sample of the current block. The image decoding method may further comprise sequentially searching for a searched reference sample of at least one reference line from a plurality of reference lines, except for the upper left reference sample. The image decoding method may further comprise determining a second sample value of remaining reference samples of the current block, except for the upper left reference sample. The image decoding method may further comprise performing intra prediction on the current block to obtain a prediction block of the current block. The image decoding method may further comprise obtaining a residual block of the current block and a reconstruction block of the current block.

公开(公告)号：US20220109870A1

公开(公告)日：2022-04-07

申请号：US17552000

申请日：2021-12-15

申请人： SAMSUNG ELECTRONICS CO., LTD.

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

IPC分类号： H04N19/573 ,  H04N19/139 ,  H04N19/176 ,  H04N19/105

摘要： A method of decoding motion information may include: obtaining, from a bitstream, change information indicating whether to change motion information of a neighboring block; when the change information indicates a change of the motion information and a higher block is able to use one reference picture list, identifying the number of pictures included in the reference picture list of the current block; selecting, as a reference picture of the current block, a reference picture of the neighboring block based on the number of pictures; when the reference picture of the neighboring block is selected as the reference picture of the current block, obtaining a motion vector of the current block by applying an offset to a motion vector of the neighboring block; and reconstructing the current block by using a reference block indicated by the motion vector of the current block in the reference picture of the current block.

公开(公告)号：US20220038696A1

公开(公告)日：2022-02-03

申请号：US17480816

申请日：2021-09-21

申请人： SAMSUNG ELECTRONICS CO., LTD.

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

IPC分类号： H04N19/119 ,  H04N19/176

摘要： According to an embodiment of the disclosure, a video decoding method includes obtaining, from a bitstream, information indicating a first difference between a maximum size of a coding unit of which a width and a height have a ratio of 1:4 and a size of a largest coding unit, determining the maximum size of the coding unit of which the width and the height have a ratio of 1:4 by using the size of the largest coding unit and the first difference, determining a minimum size of the coding unit of which the width and the height have a ratio of 1:4 based on a minimum size of a coding unit, determining whether it is possible to generate a coding unit of which a width and a height have a ratio of 1:4 by splitting a first coding unit based on the maximum size and the minimum size of the coding unit of which the width and the height have a ratio of 1:4, and determining a second coding unit including the coding unit of which the width and the height have a ratio of 1:4, from the first coding unit, and decoding the second coding unit.

公开(公告)号：US20210344954A1

公开(公告)日：2021-11-04

申请号：US17375769

申请日：2021-07-14

申请人： SAMSUNG ELECTRONICS CO., LTD.

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

IPC分类号： H04N19/593 ,  H04N19/11 ,  H04N19/176 ,  H04N19/82 ,  H04N19/132 ,  H04N19/136

摘要： A video decoding method includes predicting a current block according to an intra prediction mode of the current block, determining whether to apply position dependent intra prediction filtering to the current block according to the intra prediction mode of the current block, when the position dependent intra prediction filtering is applied to the current block, determining at least one of an upper reference sample, a left reference sample, an upper weight, and a left weight for the position dependent intra prediction filtering of a current sample of the current block according to the intra prediction mode of the current block, and applying the position dependent intra prediction filtering to the current sample of the current block according to at least one of the upper reference sample, the left reference sample, the upper weight, and the left weight.

公开(公告)号：US20210344929A1

公开(公告)日：2021-11-04

申请号：US17270944

申请日：2019-08-26

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Narae CHOI ,  Minwoo PARK ,  Minsoo PARK ,  Kiho CHOI ,  Yinji PI AO ,  Seungsoo JEONG ,  Woongil CHOI ,  Anish TAMSE ,  Gahyun RYU

IPC分类号： H04N19/139 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

摘要： Video decoding includes obtaining intra prediction mode information for a current block; determining an intra prediction direction indicated by the intra prediction mode, and a shape of the current block; predicting the current block by intra predicting the current block; and reconstructing the current block, according to a prediction result with respect to the current block. The intra prediction direction of the current block is used and may include: when the current block has the square shape, determining the intra prediction direction of the current block in a prediction direction indicated by the intra prediction mode information; and when the current block has the non-square shape, determining the intra prediction direction of the current block based on a result of comparison between a reference prediction direction and the prediction direction, the reference prediction direction being determined according to a ratio of the width and the height of the current block.

公开(公告)号：US20210274184A1

公开(公告)日：2021-09-02

申请号：US17184009

申请日：2021-02-24

申请人： SAMSUNG ELECTRONICS CO., LTD.

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 ,  H04N19/96 ,  H04N19/186 ,  H04N19/176

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.