公开(公告)号：US11917138B2

公开(公告)日：2024-02-27

申请号：US17827058

申请日：2022-05-27

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Narae Choi ,  Minwoo Park ,  Chanyul Kim ,  Minsoo Park ,  Yumi Sohn ,  Seungsoo Jeong ,  Kiho Choi ,  Woongil Choi ,  Anish Tamse ,  Yinji Piao

IPC: H04N11/02 ,  H04N19/11 ,  H04N19/176

CPC classification number: H04N19/11 ,  H04N19/176

Abstract: 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：US20230353728A1

公开(公告)日：2023-11-02

申请号：US18346697

申请日：2023-07-03

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Seungsoo JEONG ,  Gahyun Ryu ,  Minsoo Park ,  Minwoo Park ,  Kiho Choi ,  Narae Choi ,  Woongil Choi ,  Anish Tamse ,  Yinji Piao

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/177 ,  H04N19/91

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/177 ,  H04N19/91

Abstract: 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.

公开(公告)号：US11800104B2

公开(公告)日：2023-10-24

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

CPC classification number: 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：US11743467B2

公开(公告)日：2023-08-29

申请号：US17293351

申请日：2019-11-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Yinji Piao ,  Gahyun Ryu ,  Minsoo Park ,  Minwoo Park ,  Seungsoo Jeong ,  Kiho Choi ,  Narae Choi ,  Woongil Choi ,  Anish Tamse

IPC: H04N19/13 ,  H04N19/18 ,  H04N19/70 ,  H04N19/91 ,  H03M7/40

CPC classification number: H04N19/13 ,  H04N19/18 ,  H04N19/70 ,  H04N19/91 ,  H03M7/4075

Abstract: 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.

公开(公告)号：US11722673B2

公开(公告)日：2023-08-08

申请号：US17251305

申请日：2019-06-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Narae Choi ,  Minwoo Park ,  Minsoo Park ,  Seungsoo Jeong ,  Kiho Choi ,  Woongil Choi ,  Anish Tamse ,  Yinji Piao

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/80

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/80

Abstract: 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.

公开(公告)号：US11716460B2

公开(公告)日：2023-08-01

申请号：US17294164

申请日：2019-11-15

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Seungsoo Jeong ,  Gahyun Ryu ,  Minsoo Park ,  Minwoo Park ,  Kiho Choi ,  Narae Choi ,  Woongil Choi ,  Anish Tamse ,  Yinji Piao

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/177 ,  H04N19/91

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/177 ,  H04N19/91

Abstract: 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.

公开(公告)号：US11425416B2

公开(公告)日：2022-08-23

申请号：US17311209

申请日：2019-12-06

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Anish Tamse ,  Minwoo Park ,  Gahyun Ryu ,  Minsoo Park ,  Seungsoo Jeong ,  Kiho Choi ,  Narae Choi ,  Woongil Choi ,  Yinji Piao

IPC: H04N19/52 ,  H04N19/186 ,  H04N19/119 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/527

Abstract: 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：US20220232237A1

公开(公告)日：2022-07-21

申请号：US17713693

申请日：2022-04-05

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Woongil Choi ,  Minwoo Park ,  Kwangpyo Choi ,  Kiho Choi

IPC: H04N19/46 ,  H04N19/189 ,  H04N19/184 ,  H04N19/176

Abstract: An image decoding method may include: receiving a bitstream generated as a result of encoding an image sequence; obtaining, from a sequence parameter set of the bitstream, a first tool set index indicating a tool allowed to decode the bitstream among a plurality of tools; obtaining, from the sequence parameter set, tool flags based on the tool flags, identifying a tool that has been used to encode the image sequence among the plurality of tools; and reconstructing the image sequence based on the identified tool, wherein values of the tool flags are set according to a value of the first tool set index.

公开(公告)号：US11297315B2

公开(公告)日：2022-04-05

申请号：US17042461

申请日：2019-04-24

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Narae Choi ,  Minsoo Park ,  Minwoo Park ,  Seungsoo Jeong ,  Kiho Choi ,  Woongil Choi ,  Anish Tamse ,  Yinji Piao

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: 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.

公开(公告)号：US11070842B2

公开(公告)日：2021-07-20

申请号：US16959005

申请日：2018-12-28

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kiho Choi ,  Jinyoung Lee

IPC: H04N19/61 ,  H04N19/105 ,  H04N19/184

Abstract: In video encoding and decoding processes, in order to add a motion vector when the motion vector is insufficient in a motion vector prediction value candidate list of a current block, provided are method and apparatus for determining a base motion vector in a motion vector candidate list, determining the motion vector candidate list including an additional motion vector candidate determined based on the determined base motion vector and predetermined offset information, and determining a motion vector of the current block by using an additional motion vector candidate determined in the motion vector candidate list.