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：US20220021900A1

公开(公告)日：2022-01-20

申请号：US17419127

申请日：2019-12-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Seungsoo JEONG ,  Minwoo PARK

IPC: H04N19/523 ,  H04N19/103 ,  H04N19/513 ,  H04N19/176

Abstract: Provided is a video decoding method including: obtaining, from a sequence parameter set, sequence merge mode with motion vector difference (sequence MMVD) information indicating whether an MMVD mode is applicable in a current sequence; when the MMVD mode is applicable according to the sequence MMVD information, obtaining, from a bitstream, first MMVD information indicating whether the MMVD mode is applied in a first inter prediction mode for a current block included in the current sequence; when the MMVD mode is applicable in the first inter prediction mode according to the first MMVD information, reconstructing a motion vector of the current block which is to be used in the first inter prediction mode, by using a distance of a motion vector difference and a direction of a motion vector difference obtained from the bitstream; and reconstructing the current block by using the motion vector of the current block.

公开(公告)号：US20220007025A1

公开(公告)日：2022-01-06

申请号：US17475815

申请日：2021-09-15

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Anish TAMSE ,  Minwoo PARK ,  Woongil CHOI

IPC: H04N19/13

Abstract: A video decoding method includes obtaining an initial value of a context model for a syntax element, determining, based on the initial value, slope size information, slope sign information, offset size information, and offset sign information of the context model, determining an initial probability of the context model based on the slope size information, the slope sign information, the offset size information, the offset sign information, and a quantization parameter, obtaining at least one bin of a symbol indicating the syntax element by performing context adaptive binary arithmetic coding (CABAC) decoding based on the initial probability of the context model, and reconstructing a video based on the at least one bin.

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：US20210360225A1

公开(公告)日：2021-11-18

申请号：US17263406

申请日：2019-07-29

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Minwoo PARK ,  Minsoo PARK ,  Seungsoo JEONG ,  Anish TAMSE

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/52 ,  H04N19/80 ,  H04N19/159

Abstract: A method of decoding an image according to an embodiment includes: when a size of a current block in the image is equal to or greater than a certain size, determining a candidate list including, as a candidate, a first reference block indicated by a temporal motion vector; when the first reference block is selected from among candidates included in the candidate list, determining motion vectors of sub-blocks in the current block by using motion vectors obtained from the first reference block; and reconstructing the current block based on sample values of a second reference block indicated by the motion vectors of the sub-blocks.

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.

公开(公告)号：US20210218964A1

公开(公告)日：2021-07-15

申请号：US17052573

申请日：2019-05-10

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/60 ,  H04N19/103

Abstract: Provided is an image decoding method including: determining a first coding block and a second coding block corresponding to the first coding block; when a size of the first coding block is equal to or smaller than a preset size, obtaining first split shape mode information and second split shape mode information from a bitstream; determining a split mode of the first coding block, based on the first split shape mode information, and determining a split mode of the second coding block, based on the second split shape mode information; and decoding a coding block of a first color component which is determined based on the split mode of the first coding block and a coding block of a second color component which is determined based on the split mode of the second coding block.