公开(公告)号：US20210281852A1

公开(公告)日：2021-09-09

申请号：US16317910

申请日：2017-07-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Alexandria ALSHIN

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/105 ,  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：US20210281831A1

公开(公告)日：2021-09-09

申请号：US16317862

申请日：2017-07-07

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Alexander ALSHIN ,  Elena ALSHINA

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: Provided is a video decoding method including: obtaining correlation information of a luma value and a chroma value from a most probable chroma (MPC) mode reference region of a current chroma block; determining a prediction value of a chroma sample of the current chroma block from luma samples of a current luma block corresponding to the current chroma block, according to the correlation information; and decoding the current chroma block based on the prediction value of the chroma sample.

公开(公告)号：US20200177901A1

公开(公告)日：2020-06-04

申请号：US16613184

申请日：2018-07-03

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/44 ,  H04N19/176 ,  H04N19/159 ,  H04N19/186 ,  H04N19/122

Abstract: Provided are a method and apparatus for performing transformation and inverse transformation on a current block by using multi-core transform kernels in video encoding and decoding processes. According to an aspect of the present disclosure, a video decoding method may include obtaining, from a bitstream, multi-core transformation information indicating whether multi-core transformation kernels are to be used according to a size of a current block; obtaining horizontal transform kernel information and vertical transform kernel information from the bitstream when the multi-core transformation kernels are used according to the multi-core transformation information; determining a horizontal transform kernel for the current block according to the horizontal transform kernel information; determining a vertical transform kernel for the current block according to the vertical transform kernel information; and performing inverse transformation on the current block by using the horizontal transform kernel and the vertical transform kernel.

公开(公告)号：US20190342577A1

公开(公告)日：2019-11-07

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: H04N19/597 ,  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.

公开(公告)号：US20180124408A1

公开(公告)日：2018-05-03

申请号：US15572614

申请日：2015-11-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-ho CHOI ,  Elena ALSHINA

IPC: H04N19/136 ,  H04N19/182

CPC classification number: H04N19/136 ,  H04N19/117 ,  H04N19/182 ,  H04N19/593 ,  H04N19/82

Abstract: The present disclosure provides an image encoding method and apparatus and an image decoding method and apparatus for generating a reconstructed image having a minimized error between an original image and the reconstructed image at a high bit depth and a high bit rate.The image decoding method includes parsing offset values and an offset type from a bitstream; parsing a class based on the offset type from the bitstream; selecting a plurality of pixels from among pixels adjacent to a reconstructed pixel, based on the class, and calculating a reference value based on sample values of the plurality of pixels; determining a category based on a magnitude of a difference value between the reference value and a sample value of the reconstructed pixel; selecting an offset value from among the offset values, the offset value corresponding to the category; and compensating for the sample value of the reconstructed pixel by using the selected offset value.

公开(公告)号：US20180035115A1

公开(公告)日：2018-02-01

申请号：US15727074

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：US20170374370A1

公开(公告)日：2017-12-28

申请号：US15701022

申请日：2017-09-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jung-hye MIN ,  Elena ALSHINA ,  Woo-jin HAN

IPC: H04N19/159 ,  H04N19/593 ,  H04N19/50 ,  H04N19/44 ,  H04N19/30 ,  H04N19/11 ,  H04N19/105 ,  H04N19/96 ,  H04N19/176 ,  H04N19/13 ,  H04N19/122 ,  H04N19/186 ,  H04N19/107 ,  H04N19/182 ,  H04N19/184

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/107 ,  H04N19/11 ,  H04N19/122 ,  H04N19/13 ,  H04N19/176 ,  H04N19/182 ,  H04N19/184 ,  H04N19/186 ,  H04N19/30 ,  H04N19/44 ,  H04N19/50 ,  H04N19/593 ,  H04N19/96

Abstract: A method for decoding an image including performing intra prediction on a chrominance block according to whether the intra prediction mode of the chrominance block is equal to an intra prediction mode of a luminance block.

公开(公告)号：US20170339411A1

公开(公告)日：2017-11-23

申请号：US15524329

申请日：2015-11-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/139 ,  H04N19/174 ,  H04N19/184 ,  H04N19/107 ,  H04N19/176

CPC classification number: H04N19/139 ,  H04N19/107 ,  H04N19/117 ,  H04N19/136 ,  H04N19/174 ,  H04N19/176 ,  H04N19/182 ,  H04N19/184

Abstract: Provided is a video decoding method including: acquiring offset type information of a current block; determining a neighboring sample of a current reconstruction sample of the current block according to an edge direction when the offset type information of the current block indicates an edge type; determining an offset category of the current reconstruction sample based on a sample value gradient between a sample value of the current reconstruction sample and a sample value of the neighboring sample and a difference in the sample value gradient; and applying, from among offsets acquired from a bitstream, an offset according to the determined offset category to the current reconstruction sample.

公开(公告)号：US20170339403A1

公开(公告)日：2017-11-23

申请号：US15524315

申请日：2015-09-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jung-hye MIN ,  Elena ALSHINA ,  Yin-ji PIAO

IPC: H04N19/105 ,  H04N19/593 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/11 ,  H04N19/119 ,  H04N19/176 ,  H04N19/196 ,  H04N19/593 ,  H04N19/597

Abstract: A video decoding method includes determining an intra prediction mode of a current lower block corresponding to one of a plurality of lower blocks generated by splitting an upper block, determining reference samples of the current lower block based on samples adjacent to the upper block, determining a predicted value of a current sample included in the current lower block, by using the reference samples based on the intra prediction mode, and reconstructing the current lower block based on the predicted value, wherein the current sample included in the current lower block is excluded from reference samples of another lower block included in the upper block.

公开(公告)号：US20170332105A1

公开(公告)日：2017-11-16

申请号：US15659162

申请日：2017-07-25

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Alexander ALSHIN ,  Elena ALSHINA ,  Nikolay SHLYAKHOV

IPC: H04N19/65 ,  H04N19/96 ,  H04N19/85 ,  H04N19/82 ,  H04N19/463 ,  H04N19/44 ,  H04N19/117 ,  H04N19/196 ,  H04N19/182 ,  H04N19/176 ,  H04N19/17 ,  H04N19/137 ,  H04N19/136 ,  H04N19/40 ,  G06K9/46

CPC classification number: H04N19/65 ,  G06K9/4604 ,  H04N19/117 ,  H04N19/136 ,  H04N19/137 ,  H04N19/17 ,  H04N19/176 ,  H04N19/182 ,  H04N19/196 ,  H04N19/40 ,  H04N19/44 ,  H04N19/463 ,  H04N19/82 ,  H04N19/85 ,  H04N19/96

Abstract: Provided are a method and apparatus of encoding a video by compensating for a pixel value and a method and apparatus of decoding a video by compensating for a pixel value. The method of encoding the video includes: encoding image data; decoding the encoded image data and generating a restored image by performing loop filtering on the decoded image data; determining a compensation value corresponding to errors between a predetermined group restored pixels in the restored image and corresponding original pixels, and a pixel group including a restored pixel to be compensated for by using the compensation value; and encoding the compensation value and transmitting the encoded compensation value and a bitstream of the encoded image data.