公开(公告)号：US11924462B2

公开(公告)日：2024-03-05

申请号：US18166272

申请日：2023-02-08

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Yin-Ji Piao ,  Jie Chen ,  Elena Alshina

IPC: H04N7/12 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/52 ,  H04N19/635 ,  H04N19/64

CPC classification number: H04N19/52 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/635 ,  H04N19/647

Abstract: A video decoding method includes obtaining split information indicating whether to split a current block, splitting the current block into two or more lower blocks when the split information indicates to split the current block, obtaining encoding order information indicating an encoding order of the lower blocks of the current block, determining a decoding order of the lower blocks according to the encoding order information, and decoding the lower blocks according to the decoding order.

公开(公告)号：US11825117B2

公开(公告)日：2023-11-21

申请号：US16959726

申请日：2019-01-07

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Yinji Piao ,  Elena Alshina ,  Alexander Alshin ,  Anish Tamse

IPC: H04N19/615 ,  H04N19/105 ,  H04N19/109 ,  H04N19/117 ,  H04N19/176 ,  H04N19/423

CPC classification number: H04N19/615 ,  H04N19/105 ,  H04N19/109 ,  H04N19/117 ,  H04N19/176 ,  H04N19/423

Abstract: Provided is a video decoding method including: determining an inter prediction mode of a current block when the current block is inter-predicted; determining at least one reference sample location to be referred to by the current block, based on the inter prediction mode of the current block; determining filter information to be applied to at least one reconstructed reference sample corresponding to the at least one reference sample location, based on the inter prediction mode of the current block; performing filtering on the at least one reconstructed reference sample, based on the filter information; and decoding the current block by using prediction samples generated via the filtering.

公开(公告)号：US20230188747A1

公开(公告)日：2023-06-15

申请号：US18166272

申请日：2023-02-08

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Yin-ji PIAO ,  Jie Chen ,  Elena Alshina

IPC: H04N19/52 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/635 ,  H04N19/64

CPC classification number: H04N19/52 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/635 ,  H04N19/647

Abstract: A video decoding method includes obtaining split information indicating whether to split a current block, splitting the current block into two or more lower blocks when the split information indicates to split the current block, obtaining encoding order information indicating an encoding order of the lower blocks of the current block, determining a decoding order of the lower blocks according to the encoding order information, and decoding the lower blocks according to the decoding order.

公开(公告)号：US11582476B2

公开(公告)日：2023-02-14

申请号：US17317331

申请日：2021-05-11

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：US11553182B2

公开(公告)日：2023-01-10

申请号：US17167850

申请日：2021-02-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena Alshina ,  Mikhail Mishurovskiy ,  Alexander Alshin

IPC: H04N19/124 ,  H04N19/122 ,  H04N19/182 ,  H04N19/91 ,  H04N19/44 ,  H04N19/61 ,  H04N19/126 ,  H04N19/70 ,  H04N19/137 ,  H04N19/51 ,  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：US11265578B2

公开(公告)日：2022-03-01

申请号：US16075439

申请日：2017-02-03

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-ho Choi ,  Min-soo Park ,  Alexander Alshin ,  Elena Alshina

IPC: H04N19/61 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: Provided are a method and apparatus for performing transformation and inverse transformation on a chroma block by using a variable transform kernel, during video encoding and decoding processes. A video decoding method includes: obtaining, from a bitstream, chroma multi-transform kernel information indicating whether a chroma transform kernel for inverse transformation of a chroma block is determined to be among a plurality of chroma transform kernels; while determining whether the chroma transform kernel is determined to be among the plurality of chroma transform kernels according to the chroma multi-transform kernel information, determining whether to determine the chroma transform kernel by using a luma transform kernel; and performing inverse transformation on the chroma block by using the chroma transform kernel.

公开(公告)号：US11212504B2

公开(公告)日：2021-12-28

申请号：US16477966

申请日：2018-01-10

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena Alshina ,  Vladyslav Zakharchenko ,  Kwang-pyo Choi

IPC: H04N13/139 ,  H04N13/178 ,  H04N19/597

Abstract: Provided are a method and apparatus for encoding or decoding a 360-degree image. An image decoding method and apparatus according to an embodiment include: obtaining image data from a bitstream; decoding a first region of a projection image corresponding to a non-clipping region of a 360-degree image from the image data; obtaining information about a clipping region of the 360-degree image from the bitstream; determining a second region of the projection image, based on the information about the clipping region; and converting the projection image including the first region and the second region into the 360-degree image.

公开(公告)号：US11212497B2

公开(公告)日：2021-12-28

申请号：US16476716

申请日：2018-03-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sri Nitchith Akula ,  Amith Dsouza ,  Anubhav Singh ,  Ramkumaar Kovil Kanthadai ,  Chirag Pujara ,  Raj Narayana Gadde ,  Kwang-pyo Choi ,  Elena Alshina ,  Woong-il Choi

IPC: H04N9/31 ,  H04N19/597 ,  H04N19/82

Abstract: Accordingly embodiments herein disclose a method for producing 360 degree image content on a rectangular projection. The method includes detecting whether at least one discontinuous boundary is present in the 360-degree image content, wherein the at least one discontinuous boundary is detected using the packing of one or more projection segments. Further, the method includes obtaining one or more reconstructed blocks from the 360-degree image content. The reconstructed blocks are generated from the 360 degree image content. Further, the method includes performing one of enabling at least one in-loop filtering function on the one or more reconstructed blocks of the 360 degree image content when the at least one of image content discontinuous boundary is not present and disabling at least one in-loop filtering function on the one or more reconstructed blocks of the 360 degree image content located around the at least one discontinuous boundary.

公开(公告)号：US20210281872A1

公开(公告)日：2021-09-09

申请号：US17317331

申请日：2021-05-11

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：US10931971B2

公开(公告)日：2021-02-23

申请号：US16474389

申请日：2017-12-27

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena Alshina ,  Vladyslav Zakharchenko ,  Alexander Alshin ,  Kwang-pyo Choi

IPC: H04N19/00 ,  H04N19/597 ,  H04N19/46

Abstract: Provided are a method and apparatus for encoding or decoding a 360-degree image. According to an image decoding method and apparatus according to an embodiment, an original 360-degree image is reconstructed by acquiring image data from a bitstream, decoding a projection image of a 360-degree image from the image data, converting the projection image into the 360-degree image, acquiring rotation information of the 360-degree image from the bitstream, and rotating the 360-degree image based on the rotation information.