公开(公告)号：US20230069175A1

公开(公告)日：2023-03-02

申请号：US17981597

申请日：2022-11-07

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Anish TAMSE ,  Minwoo PARK ,  Minsoo PARK

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

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：US20230059592A1

公开(公告)日：2023-02-23

申请号：US17981611

申请日：2022-11-07

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Anish TAMSE ,  Minwoo Park ,  Minsoo Park

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

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：US20230047715A1

公开(公告)日：2023-02-16

申请号：US17981015

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 ,  H04N19/186 ,  H04N19/96 ,  H04N19/159 ,  H04N19/176

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：US20230032531A1

公开(公告)日：2023-02-02

申请号：US17962156

申请日：2022-10-07

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/577 ,  H04N19/105 ,  H04N19/119 ,  H04N19/44

Abstract: A video decoding method includes determining, based on an area of a current block, whether a multi-prediction combination mode for predicting the current block by combining prediction results obtained according to a plurality of prediction modes is applied to the current block, when the multi-prediction combination mode is applied to the current block, determining the plurality of prediction modes to be applied to the current block, generating a plurality of prediction blocks of the current block, according to the plurality of prediction modes, and determining a combined prediction block of the current block, by combining the plurality of prediction blocks according to respective weights.

公开(公告)号：US20220109877A1

公开(公告)日：2022-04-07

申请号：US17416987

申请日：2019-12-20

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 ,  H04N19/70 ,  H04N19/176 ,  H04N19/136 ,  H04N19/105 ,  H04N19/186 ,  H04N19/503 ,  H04N19/593

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：US20220109839A1

公开(公告)日：2022-04-07

申请号：US17554073

申请日：2021-12-17

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kiho CHOI ,  Anish TAMSE ,  Minwoo PARK ,  Yinji PIAO

IPC: H04N19/12 ,  H04N19/13 ,  H04N19/44 ,  H04N19/60

Abstract: The present disclosure relates to video encoding and decoding methods and devices. In an example video decoding method, the method may include obtaining a first bin for an adaptive transform. The method may further include performing arithmetic decoding on the first bin in a bypass mode. The method may further include obtaining, when the adaptive transform is applied, a second bin for horizontal adaptive transform information and a third bin for vertical adaptive transform information. The method may further include performing, using the context model, arithmetic decoding on the second bin and on the third bin. The method may further include determining a horizontal transform kernel based on the horizontal adaptive transform information, and determining a vertical transform kernel based on the vertical adaptive transform information. The method may further include performing inverse transformation on a current block based on the horizontal transform kernel and the vertical transform kernel.

公开(公告)号：US20220014774A1

公开(公告)日：2022-01-13

申请号：US17283470

申请日：2019-10-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Woongil CHOI ,  Gahyun RYU ,  Minsoo PARK ,  Minwoo PARK ,  Yumi SOHN ,  Seungsoo JEONG ,  Narae CHOI ,  Anish TAMSE

IPC: H04N19/513 ,  H04N19/139 ,  H04N19/176 ,  H04N19/119 ,  H04N19/172 ,  H04N19/117 ,  H04N19/109

Abstract: Provided is a video decoding method including: determining whether or not to perform history-based motion vector prediction for inter-prediction of a current block, based on a location of the current block in a tile including a plurality of largest coding units; when it is determined to perform the history-based motion vector prediction on the current block, generating a motion information candidate list including history-based motion vector candidates; determining a motion vector of the current block by using a motion vector predictor determined from the motion information candidate list; and reconstructing the current block by using the motion vector of the current block, wherein, when a motion constraint is applied to a first tile group, when a reference picture of a first tile from among tiles included in the first tile group is a second picture, a motion vector of the first tile is not permitted to indicate a block of the second picture, the block being located outside a second tile group, and when the motion constraint is not applied to the first tile group, the motion vector of the first tile is permitted to indicate the block of the second picture, the block being located outside the second tile group.

公开(公告)号：US20210377560A1

公开(公告)日：2021-12-02

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 ,  H04N19/159 ,  H04N19/119 ,  H04N19/139 ,  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：US20210360277A1

公开(公告)日：2021-11-18

申请号：US17284354

申请日：2019-10-10

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Seungsoo JEONG ,  Minwoo PARK ,  Kiho CHOI ,  Anish TAMSE

IPC: H04N19/513 ,  H04N19/109 ,  H04N19/139 ,  H04N19/176 ,  H04N19/91

Abstract: Provided is a video decoding method including: generating a merge candidate list including neighboring blocks referred to to predict a motion vector of a current block in a skip mode or a merge mode; when a merge motion vector difference is used according to merge difference mode information indicating whether the merge motion vector difference and a motion vector determined from the merge candidate list are used, determining a base motion vector from a candidate determined among the merge candidate list based on merge candidate information; determining the motion vector of the current block by using the base motion vector and a merge motion vector difference of the current block, the merge motion vector difference being determined by using a distance index and direction index of the merge motion vector difference of the current block; and reconstructing the current block by using the motion vector of the current block.

公开(公告)号：US20210235095A1

公开(公告)日：2021-07-29

申请号：US17051999

申请日：2019-05-10

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

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

Abstract: 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.