公开(公告)号：US12192508B2

公开(公告)日：2025-01-07

申请号：US18151266

申请日：2023-01-06

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Alexander Alshin ,  Elena Alshina

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176

Abstract: Provided is a video decoding method including determining a displacement vector per unit time of pixels of a current block in a horizontal direction or a vertical direction, the pixels including a pixel adjacent to an inside of a boundary of the current block, by using values about reference pixels included in a first reference block and a second reference block, without using a stored value about a pixel located outside boundaries of the first reference block and the second reference block; and obtaining a prediction block of the current block by performing block-unit motion compensation and pixel group unit motion compensation on the current block by using a gradient value in the horizontal direction or the vertical direction of a first corresponding reference pixel in the first reference block which corresponds to a current pixel included in a current pixel group in the current block, a gradient value in the horizontal direction or the vertical direction of a second corresponding reference pixel in the second reference block which corresponds to the current pixel, a pixel value of the first corresponding reference pixel, a pixel value of the second corresponding reference pixel, and a displacement vector per unit time of the current pixel in the horizontal direction or the vertical direction. In this regard, the current pixel group may include at least one pixel.

公开(公告)号：US12003761B2

公开(公告)日：2024-06-04

申请号：US17479674

申请日：2021-09-20

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Alexander Alshin ,  Elena Alshina

IPC: H04N19/577 ,  H04N19/105 ,  H04N19/136 ,  H04N19/176 ,  H04N19/182 ,  H04N19/523 ,  H04N19/537

CPC classification number: H04N19/577 ,  H04N19/105 ,  H04N19/136 ,  H04N19/176 ,  H04N19/182 ,  H04N19/523 ,  H04N19/537

Abstract: A video decoding and video encoding method of performing inter prediction in a bi-directional motion prediction mode, in which a prediction pixel value of a current block may be generated by not only using a pixel value of a first reference block of a first reference picture and a pixel value of a second reference block of a second reference picture, but also using a first gradient value of the first reference block and a second gradient value of the second reference block, in a bi-directional motion prediction mode. Accordingly, encoding and decoding efficiency may be increased since a prediction block similar to an original block may be generated.

公开(公告)号：US11973934B2

公开(公告)日：2024-04-30

申请号：US17696514

申请日：2022-03-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-Ho Choi ,  Min-woo Park ,  Elena Alshina ,  Chan-yul Kim ,  In-kwon Choi

IPC: H04N19/105 ,  H04N19/119 ,  H04N19/122 ,  H04N19/129 ,  H04N19/13 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46

CPC classification number: H04N19/105 ,  H04N19/122 ,  H04N19/129 ,  H04N19/13 ,  H04N19/176 ,  H04N19/44 ,  H04N19/119 ,  H04N19/46

Abstract: Provided is a method of decoding a video according to an embodiment, the method including determining at least one processing block for splitting the video; determining an order of determining at least one largest coding unit in the at least one processing block; determining at least one largest coding unit on the basis of the determined order; and decoding the determined at least one largest coding unit, wherein the order is one of a plurality of orders for determining a largest coding unit.

公开(公告)号：US11962752B2

公开(公告)日：2024-04-16

申请号：US16939642

申请日：2020-07-27

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-ho Choi ,  Min-woo Park ,  Elena Alshina ,  Chan-yul Kim ,  In-kwon Choi

IPC: H04N19/105 ,  H04N19/119 ,  H04N19/122 ,  H04N19/129 ,  H04N19/13 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46

CPC classification number: H04N19/105 ,  H04N19/122 ,  H04N19/129 ,  H04N19/13 ,  H04N19/176 ,  H04N19/44 ,  H04N19/119 ,  H04N19/46

Abstract: Provided is a method of decoding a video according to an embodiment, the method including determining at least one processing block for splitting the video; determining an order of determining at least one largest coding unit in the at least one processing block; determining at least one largest coding unit on the basis of the determined order; and decoding the determined at least one largest coding unit, wherein the order is one of a plurality of orders for determining a largest coding unit.

公开(公告)号：US11909986B2

公开(公告)日：2024-02-20

申请号：US17973798

申请日：2022-10-26

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena Alshina ,  Alexander Alshin

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/573

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/573

Abstract: Provided is a video decoding method including: obtaining a first motion vector indicating a first reference block of a current block in a first reference picture and a second motion vector indicating a second reference block of the current block in a second reference picture; obtaining a parameter related to pixel group unit motion compensation of the current block, based on at least one of information of the parameter related to the pixel group unit motion compensation and a parameter related to an image including the current picture; generating a prediction block by performing, with respect to the current block, block unit motion compensation based on the first motion vector and the second motion vector and performing the pixel group unit motion compensation based on the parameter related to the pixel group unit motion compensation; and reconstructing the current block. Here, a pixel group may include at least one pixel.

公开(公告)号：US11638006B2

公开(公告)日：2023-04-25

申请号：US17167866

申请日：2021-02-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena Alshina ,  Mikhail Mishurovskiy ,  Alexander Alshin

IPC: H04N19/91 ,  H04N19/44 ,  H04N19/61 ,  H04N19/137 ,  H04N19/51 ,  H04N19/124 ,  H04N19/122 ,  H04N19/182 ,  H04N19/126 ,  H04N19/70 ,  H04N19/194 ,  H04N19/11 ,  H04N19/109 ,  H04N19/18 ,  H04N19/537 ,  H04N19/46 ,  H04N19/593 ,  H04N19/63 ,  H04N19/13 ,  H04N19/436 ,  H04N19/139 ,  H04N19/176 ,  H04N19/513 ,  H04N19/57

Abstract: An image decoding method and apparatus according to an embodiment may extract, from a bitstream, a quantization coefficient generated through core transformation, secondary transformation, and quantization; generate an inverse-quantization coefficient by performing inverse quantization on the quantization coefficient; generate a secondary inverse-transformation coefficient by performing secondary inverse-transformation on a low frequency component of the inverse-quantization coefficient, the secondary inverse-transformation corresponding to the secondary transformation; and perform core inverse-transformation on the secondary inverse-transformation coefficient, the core inverse-transformation corresponding to the core transformation.

公开(公告)号：US11563952B2

公开(公告)日：2023-01-24

申请号：US16317910

申请日：2017-07-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena Alshina ,  Alexander Alshin

IPC: H04N19/159 ,  H04N19/573 ,  H04N19/176 ,  H04N19/105

Abstract: Provided is a video decoding method including: obtaining a first motion vector indicating a first reference block of a current block in a first reference picture and a second motion vector indicating a second reference block of the current block in a second reference picture; obtaining a parameter related to pixel group unit motion compensation of the current block, based on at least one of information of the parameter related to the pixel group unit motion compensation and a parameter related to an image including the current picture; generating a prediction block by performing, with respect to the current block, block unit motion compensation based on the first motion vector and the second motion vector and performing the pixel group unit motion compensation based on the parameter related to the pixel group unit motion compensation; and reconstructing the current block. Here, a pixel group may include at least one pixel.

公开(公告)号：US11051033B2

公开(公告)日：2021-06-29

申请号：US16476173

申请日：2018-01-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Alexander Alshin ,  Elena Alshina

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176

Abstract: Provided is a video decoding method including determining a displacement vector per unit time of pixels of a current block in a horizontal direction or a vertical direction, the pixels including a pixel adjacent to an inside of a boundary of the current block, by using values about reference pixels included in a first reference block and a second reference block, without using a stored value about a pixel located outside boundaries of the first reference block and the second reference block; and obtaining a prediction block of the current block by performing block-unit motion compensation and pixel group unit motion compensation on the current block by using a gradient value in the horizontal direction or the vertical direction of a first corresponding reference pixel in the first reference block which corresponds to a current pixel included in a current pixel group in the current block, a gradient value in the horizontal direction or the vertical direction of a second corresponding reference pixel in the second reference block which corresponds to the current pixel, a pixel value of the first corresponding reference pixel, a pixel value of the second corresponding reference pixel, and a displacement vector per unit time of the current pixel in the horizontal direction or the vertical direction. In this regard, the current pixel group may include at least one pixel.

公开(公告)号：US10659806B2

公开(公告)日：2020-05-19

申请号：US15524463

申请日：2015-11-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena Alshina ,  Alexander Alshin

IPC: H04N19/52 ,  H04N19/117 ,  H04N19/503 ,  H04N19/136 ,  H04N19/132 ,  H04N19/122 ,  H04N19/137 ,  H04N19/182 ,  H04N19/523 ,  H04N19/61 ,  H04N19/625 ,  H04N19/80 ,  H04N19/176

Abstract: Provided are a video encoding method and apparatus to which an interpolation filter is applied according to characteristics of an image for motion compensation, and a video decoding method and apparatus corresponding thereto. The video encoding method according to various embodiments includes determining a degree of change between neighboring samples of at least one integer pixel unit adjacent to a reference sample of an integer pixel unit of a current sample and the reference sample; determining an interpolation filter among interpolation filters having different frequency passbands and configured to produce reference samples of a sub-pixel unit to predict the current sample, based on the degree of change; determining a predicted sample value of the current sample by using a reference sample of a sub-pixel unit produced by applying the determined interpolation filter; and encoding a residual value between the predicted sample value and a sample value of the current sample.

公开(公告)号：US10277903B2

公开(公告)日：2019-04-30

申请号：US15727003

申请日：2017-10-06

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena Alshina ,  Alexander Alshin ,  Jeong-hoon Park

IPC: H04N19/14 ,  H04N19/103 ,  H04N19/186 ,  H04N19/13 ,  H04N19/82 ,  H04N19/91 ,  H04N19/463 ,  H04N19/86

Abstract: The present disclosure relates to signaling of sample adaptive offset (SAO) parameters determined to minimize an error between an original image and a reconstructed image in video encoding and decoding operations. An SAO decoding method includes obtaining context-encoded leftward SAO merge information and context-encoded upward SAO merge information from a bitstream of a largest coding unit (MCU); obtaining SAO on/off information context-encoded with respect to each color component, from the bitstream; if the SAO on/off information indicates to perform SAO operation, obtaining absolute offset value information for each SAO category bypass-encoded with respect to each color component, from the bitstream; and obtaining one of band position information and edge class information bypass-encoded with respect to each color component, from the bitstream.