公开(公告)号：US20220210461A1

公开(公告)日：2022-06-30

申请号：US17698638

申请日：2022-03-18

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Yinji PIAO ,  Anish TAMSE

IPC: H04N19/513 ,  H04N19/44

Abstract: Methods and apparatuses for encoding and decoding motion information are provided. In an embodiment, a method of decoding motion information includes obtaining, from a bitstream, a resolution index indicating a motion vector resolution for inter-predicting a current block, a reference index of the current block, and prediction direction information of the current block. The method further includes determining a reference picture of the current block. The method further includes determining whether a prediction direction of the current block is unidirectional prediction in an L0 or L1 direction or bidirectional prediction. The method further includes determining a motion vector resolution set including one or more selectable motion vector resolutions. The method further includes determining a motion vector based on the prediction direction, according to the motion vector resolution indicated by the resolution index from among the motion vector resolution set. The method further includes reconstructing an image using the motion vector.

公开(公告)号：US20220141484A1

公开(公告)日：2022-05-05

申请号：US17573974

申请日：2022-01-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Seungsoo JEONG ,  Minsoo PARK ,  Minwoo PARK ,  Kiho CHO ,  Yinji PIAO

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

Abstract: 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.

公开(公告)号：US20220014730A1

公开(公告)日：2022-01-13

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 ,  H04N19/91 ,  H04N19/159 ,  H04N19/177 ,  H04N19/176

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：US20210266557A1

公开(公告)日：2021-08-26

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

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：US20250150630A1

公开(公告)日：2025-05-08

申请号：US19012239

申请日：2025-01-07

Applicant: SAMSUNG ELECTRONICS CO., LTD

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

IPC: H04N19/625 ,  H04N19/105 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/503 ,  H04N19/593 ,  H04N19/70

Abstract: Provided is an image decoding method including: obtaining, from a bitstream, a syntax element regarding multiple transform selection (MTS) with respect to a current coding unit or a current transform unit included in the current coding unit; determining a horizontal transform kernel or a vertical transform kernel with respect to the current transform unit based on the obtained syntax element; obtaining a residual signal by performing inverse transformation on the current transform unit, based on the determined horizontal transform kernel or vertical transform kernel with respect to the current transform unit; and generating a reconstruction block including the current coding unit or the current transform unit based on the residual signal with respect to the current transform unit.

公开(公告)号：US20250080770A1

公开(公告)日：2025-03-06

申请号：US18950428

申请日：2024-11-18

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 ,  H04N19/105 ,  H04N19/117 ,  H04N19/139 ,  H04N19/176 ,  H04N19/70

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：US20240380900A1

公开(公告)日：2024-11-14

申请号：US18783080

申请日：2024-07-24

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/174 ,  H04N19/117 ,  H04N19/176 ,  H04N19/60 ,  H04N19/82

Abstract: 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.

公开(公告)号：US20240380899A1

公开(公告)日：2024-11-14

申请号：US18783012

申请日：2024-07-24

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/174 ,  H04N19/117 ,  H04N19/176 ,  H04N19/60 ,  H04N19/82

Abstract: 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.

公开(公告)号：US20240314295A1

公开(公告)日：2024-09-19

申请号：US18674208

申请日：2024-05-24

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/105 ,  H04N19/119 ,  H04N19/139 ,  H04N19/174 ,  H04N19/176 ,  H04N19/52 ,  H04N19/573

CPC classification number: H04N19/105 ,  H04N19/139 ,  H04N19/174 ,  H04N19/176 ,  H04N19/52 ,  H04N19/573 ,  H04N19/119

Abstract: A method, performed by a decoding apparatus, of decoding motion information, including: obtaining change information indicating whether to change motion information of a neighboring block of a current block; based on the change information indicating to change the motion information, determining a prediction direction of the current block by changing a prediction direction of the neighboring block; based on the prediction direction of the neighboring block being a first uni-direction and the prediction direction of the current block being a second uni-direction or a bi-direction, selecting a reference picture of the second uni-direction of the current block from a second reference picture list; obtaining a motion vector of the second uni-direction of the current block; and reconstructing the current block using a reference block indicated by the motion vector of the second uni-direction of the current block.

公开(公告)号：US20240223799A1

公开(公告)日：2024-07-04

申请号：US18605191

申请日：2024-03-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

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

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/82

Abstract: 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.