公开(公告)号：US20210329204A1

公开(公告)日：2021-10-21

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 ,  H04N19/82 ,  H04N19/597

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：US20210258579A1

公开(公告)日：2021-08-19

申请号：US17167866

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：US20210203990A1

公开(公告)日：2021-07-01

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 ,  H04N19/186 ,  H04N19/176

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：US20210127112A1

公开(公告)日：2021-04-29

申请号：US16617286

申请日：2018-07-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-ho CHOI ,  Min-soo PARK ,  Elena ALSHINA

IPC: H04N19/12 ,  H04N19/625 ,  H04N19/61 ,  H04N19/157 ,  H04N19/176

Abstract: Provided are an image decoding method and an image decoding apparatus for performing the image decoding method, the image decoding method including: determining whether or not to obtain second transform set information; determining the second transform set information based on the determining of whether or not to obtain the second transform set information; selecting any one second transform set applied to a second transform block from among a plurality of second transform set candidates corresponding to a plurality of prediction modes, by using the determined second transform set information; generating a first transform block by inverse-transforming the second transform block based on a plurality of transform matrices included in the selected second transform set; and generating a residual block corresponding to the first transform block by inverse-transforming the first transform block based on a first transform matrix.

公开(公告)号：US20200296358A1

公开(公告)日：2020-09-17

申请号：US16759540

申请日：2018-08-31

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jung-hye MIN ,  Alexander ALSHIN ,  Elena ALSHINA

IPC: H04N19/105 ,  H04N19/182 ,  H04N19/184 ,  H04N19/85 ,  G06T5/20

Abstract: Provided is a method of decoding an image, the method including determining at least one reference region to be referenced by a target region in the image to which a low-quality coding mode is applied; extracting a certain type of information from the determined at least one reference region; and changing pixel values of the target region, based on the extracted type of information.

公开(公告)号：US20200260104A1

公开(公告)日：2020-08-13

申请号：US16651865

申请日：2018-03-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Yin-ji PIAO ,  Jie CHEN ,  Elena ALSHINA

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

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：US20180309990A1

公开(公告)日：2018-10-25

申请号：US15767307

申请日：2016-10-13

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Mikhail MISHUROVSKIY ,  Alexander ALSHIN

IPC: H04N19/124 ,  H04N19/44 ,  H04N19/176 ,  H04N19/57 ,  H04N19/182 ,  H04N19/122 ,  H04N19/139 ,  H04N19/513

CPC classification number: H04N19/124 ,  H04N19/109 ,  H04N19/11 ,  H04N19/122 ,  H04N19/126 ,  H04N19/13 ,  H04N19/137 ,  H04N19/139 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/194 ,  H04N19/44 ,  H04N19/45 ,  H04N19/46 ,  H04N19/51 ,  H04N19/513 ,  H04N19/537 ,  H04N19/57 ,  H04N19/593 ,  H04N19/61 ,  H04N19/63 ,  H04N19/70 ,  H04N19/91

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：US20180035114A1

公开(公告)日：2018-02-01

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 ,  H04N19/463 ,  H04N19/103 ,  H04N19/186 ,  H04N19/13 ,  H04N19/91 ,  H04N19/82 ,  H04N19/86

CPC classification number: H04N19/14 ,  H04N19/103 ,  H04N19/13 ,  H04N19/186 ,  H04N19/463 ,  H04N19/82 ,  H04N19/86 ,  H04N19/91

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.

公开(公告)号：US20180027255A1

公开(公告)日：2018-01-25

申请号：US15524463

申请日：2015-11-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Alexander ALSHIN

IPC: H04N19/52 ,  H04N19/182 ,  H04N19/80 ,  H04N19/122 ,  H04N19/132 ,  H04N19/625 ,  H04N19/61 ,  H04N19/137 ,  H04N19/523

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

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：US20170318289A1

公开(公告)日：2017-11-02

申请号：US15523429

申请日：2015-09-24

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-ho CHOI ,  Alexander ALSHIN ,  Elena ALSHINA

IPC: H04N19/117 ,  H04N19/139 ,  H04N19/174 ,  H04N19/86

CPC classification number: H04N19/117 ,  H04N19/136 ,  H04N19/139 ,  H04N19/174 ,  H04N19/176 ,  H04N19/192 ,  H04N19/439 ,  H04N19/46 ,  H04N19/61 ,  H04N19/82 ,  H04N19/86

Abstract: A video decoding method comprises when a first offset method is applied to a current slice comprising a current block, adjusting an offset with respect to the current block, based on a first offset parameter of the current block; when the first offset method is applied to the current slice, determining whether to apply a second offset method to the current slice; when the second offset method is applied to the current slice, determining a second offset parameter of the current block; and applying an offset based on the second offset parameter to the current block to which the offset based on the first offset parameter is applied, wherein the first offset parameter and the second offset parameter comprise offset values for the current block.