公开(公告)号：US20240187637A1

公开(公告)日：2024-06-06

申请号：US18439221

申请日：2024-02-12

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 ,  H04N19/119 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/527

CPC classification number: H04N19/52 ,  H04N19/119 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  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：US20240073446A1

公开(公告)日：2024-02-29

申请号：US18502696

申请日：2023-11-06

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

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

CPC classification number: H04N19/56 ,  H04N19/109 ,  H04N19/176

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：US20230054879A1

公开(公告)日：2023-02-23

申请号：US17981040

申请日：2022-11-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: 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.

公开(公告)号：US20220201296A1

公开(公告)日：2022-06-23

申请号：US17689402

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：US20220124316A1

公开(公告)日：2022-04-21

申请号：US17566389

申请日：2021-12-30

Applicant: Samsung Electronics Co., LTD.

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

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

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：US20220086444A1

公开(公告)日：2022-03-17

申请号：US17532435

申请日：2021-11-22

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/129 ,  H04N19/96 ,  H04N19/46 ,  H04N19/18 ,  H04N19/176

Abstract: An image encoding/decoding method and an apparatus thereof are provided. The decoding method includes: determining a coding unit by splitting an image; determining a transform unit in the coding unit; determining whether to decode residual data of the transform unit according to a transform skip mode; obtaining a significant subgroup flag about a subgroup in the transform unit; based on the significant subgroup flag indicating that the subgroup includes at least one non-zero significant coefficient and scanning information about coefficients of the subgroup, obtaining a first bin about a significant coefficient flag, a sign flag, a first flag, and a parity flag of a coefficient of a scan position; obtaining the residual data including a coefficient in the subgroup based on the base level and a remainder of an absolute value excluding the base level; and obtaining a reconstruction block of the coding unit, based on the residual data.

公开(公告)号：US20220078409A1

公开(公告)日：2022-03-10

申请号：US17526317

申请日：2021-11-15

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

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

Abstract: An image decoding method includes: comparing a size of a current image including a current block with a size of a reference image; selecting, in the reference image, reference samples corresponding to current samples in the current block according to a motion vector of the current block; and reconstructing the current block based on the reference samples, wherein, when the size of the reference image is greater than the size of the current image, the reference samples are spaced apart from one another in the reference image by an interval corresponding to a result of the size comparison.

公开(公告)号：US20210392330A1

公开(公告)日：2021-12-16

申请号：US17285763

申请日：2019-10-18

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/13 ,  H04N19/91 ,  H04N19/30 ,  H04N19/174

Abstract: Provided is an entropy decoding method including: determining a plurality of scaling factors for updating an occurrence probability of a certain binary value for a current encoding symbol; performing arithmetic coding on a binary value of the current encoding symbol, based on the occurrence probability of the certain binary value; and updating the occurrence probability of the certain binary value by using at least one scaling factor of the plurality of scaling factors, according to the binary value of the current encoding symbol.

公开(公告)号：US20210329292A1

公开(公告)日：2021-10-21

申请号：US17272537

申请日：2019-09-17

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Seungsoo JEONG ,  Minsoo PARK ,  Minwoo PARK ,  Kiho CHOI ,  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：US20210281834A1

公开(公告)日：2021-09-09

申请号：US17259455

申请日：2019-07-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: Provided are a video decoding method and apparatus which, during video encoding and decoding processes, determine whether a current block is in contact with an upper boundary of a largest coding unit including the current block, when it is determined that the current block is in contact with the upper boundary of the largest coding unit, determine an upper reference line of the current block as one reference line, when it is determined that the current block is not in contact with the upper boundary of the largest coding unit, determine the upper reference line of the current block based on N reference lines, and use the determined upper reference line.