公开(公告)号：US20220248028A1

公开(公告)日：2022-08-04

申请号：US17728222

申请日：2022-04-25

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Minwoo PARK ,  Minsoo Park ,  Narae Choi ,  Seungsoo Jeong ,  Anish Tamse

IPC: H04N19/137 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: A video decoding method includes, determining a center motion vector of a current block by using a base motion vector of the current block based on affine model-based inter-prediction being performed in the current block, determining a reference range of an area to be referred to, with respect to the current block, based on a size of the current block, based on a reference area having a size of the reference range with respect to a point in a reference picture of the current block, the point being indicated by a central motion vector of the current block, deviating from or including a boundary of the reference picture, changing the reference area by parallelly translating the reference area into a current picture, and determining prediction samples of sub-blocks of the current block in the changed reference area from the reference picture.

公开(公告)号：US20220191491A1

公开(公告)日：2022-06-16

申请号：US17689447

申请日：2022-03-08

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Minsoo PARK ,  Minwoo PARK ,  Kiho CHOI ,  Seungsoo JEONG

IPC: H04N19/119 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

Abstract: An image decoding method includes reconstructing a current image by performing deblocking filtering on a boundary of at least one reconstruction block from among reconstruction blocks, wherein the reconstructing of the current image by performing the deblocking filtering on the boundary of the at least one reconstruction block from among the reconstruction blocks includes, when a prediction mode of at least one reconstruction mode from among blocks located on both sides of the boundary of the at least one reconstruction block is a combined inter-intra prediction mode, determining that a value of a boundary filtering strength applied to the boundary of the at least one reconstruction block is a predetermined value and performing deblocking filtering on the boundary of the at least one reconstruction block based on the determined value of the boundary filtering strength.

公开(公告)号：US20220124366A1

公开(公告)日：2022-04-21

申请号：US17561303

申请日：2021-12-23

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Seungsoo JEONG ,  Minwoo PARK ,  Minsoo PARK

IPC: H04N19/53 ,  H04N19/139 ,  H04N19/176

Abstract: In a video encoding and decoding process, a video decoding method and a video decoding apparatus are provided to for determining whether a motion vector of an adjacent block at a location corresponding to one motion vector resolution among a plurality of motion vector resolutions is available, when the motion vector of the adjacent block is available, obtaining the motion vector of the adjacent block as a motion vector predictor of a current block, when the motion vector of the adjacent block is unavailable, obtaining a default motion vector by using a motion vector of one of two other adjacent blocks of the current block as a motion vector predictor of the current block, and performing prediction on the current block based on the motion vector predictor of the current block.

公开(公告)号：US20220116613A1

公开(公告)日：2022-04-14

申请号：US17555943

申请日：2021-12-20

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Narae CHOI ,  Minwoo PARK

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

Abstract: 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

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

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

Abstract: 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：US20220078474A1

公开(公告)日：2022-03-10

申请号：US17417009

申请日：2019-12-20

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Anish TAMSE ,  Minwoo PARK ,  Minsoo PARK

IPC: H04N19/52 ,  H04N19/40 ,  H04N19/107 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196

Abstract: Provided are a video decoding method and apparatus for, in a video encoding and decoding procedure, when a merge candidate list of a current block is configured, determining whether the number of merge candidates included in the merge candidate list is greater than 1 and is smaller than a predetermined maximum merge candidate number, when the number of the merge candidates included in the merge candidate list is greater than 1 and is smaller than the predetermined maximum merge candidate number, determining an additional merge candidate by using a first merge candidate and a second merge candidate of the merge candidate list of the current block, configuring the merge candidate list by adding the determined additional merge candidate to the merge candidate list, and performing prediction on the current block, based on the merge candidate list.

公开(公告)号：US20220078453A1

公开(公告)日：2022-03-10

申请号：US17416996

申请日：2019-12-23

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Anish TAMSE ,  Minwoo PARK

IPC: H04N19/186 ,  H04N19/593 ,  H04N19/184 ,  H04N19/103

Abstract: Provided is a video decoding method including: determining an intra prediction mode of a current chroma block, from chroma intra prediction information obtained from a bitstream; when the intra prediction mode of the current chroma block according to the chroma intra prediction information is a cross component linear model (CCLM) mode, obtaining reference chroma samples adjacent to the current chroma block, and reference luma samples corresponding to the reference chroma samples; and predicting the current chroma block, based on a correlation between the reference chroma samples and the reference luma samples and a reference luma block corresponding to the current chroma block, and wherein the number of predetermined CCLM mode reference locations from which the reference chroma samples can be obtained is constant, regardless of a size of the current chroma 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

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/119 ,  H04N19/176

Abstract: 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：US20210344929A1

公开(公告)日：2021-11-04

申请号：US17270944

申请日：2019-08-26

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

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

Abstract: 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：US20210321099A1

公开(公告)日：2021-10-14

申请号：US17272110

申请日：2019-08-28

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Minwoo PARK ,  Minsoo PARK ,  Anish TAMSE

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/186 ,  H04N19/60 ,  H04N19/174

Abstract: Provided is a video decoding method including: generating coding units by splitting at least one of a height and a width of a largest coding unit having a first size; based on whether a height or a width of a non-square first coding unit including an outer boundary of an image, among the coding units, is greater than a maximum transform size, determining whether it is allowed to generate two second coding units by splitting at least one of the height and the width of the first coding unit; and decoding the second coding units generated from the first coding unit.