公开(公告)号：US09414074B2

公开(公告)日：2016-08-09

申请号：US14603297

申请日：2015-01-22

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena Alshina ,  Alexander Alshin

IPC: H04N19/122 ,  H04N19/115 ,  H04N19/60 ,  H04N19/126 ,  H04N19/184 ,  H04N19/44 ,  H04N19/42 ,  G06F17/14 ,  H04N19/146 ,  H04N19/18 ,  H04N19/136 ,  H04N19/182

CPC classification number: H04N19/122 ,  G06F17/147 ,  H04N19/115 ,  H04N19/124 ,  H04N19/126 ,  H04N19/136 ,  H04N19/146 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/184 ,  H04N19/34 ,  H04N19/42 ,  H04N19/44 ,  H04N19/45 ,  H04N19/60 ,  H04N19/625

Abstract: Provided are a video encoding method of adjusting a range of encoded output data to adjust a bit depth during restoring of encoded samples, and a video decoding method of substantially preventing overflow from occurring in output data in operations of a decoding process. The video decoding method includes parsing and restoring quantized transformation coefficients in units of blocks of an image from a received bitstream, restoring transformation coefficients by performing inverse quantization on the quantized transformation coefficients, and restoring samples by performing one-dimensional (1D) inverse transformation and inverse scaling on the quantized transformation coefficients. At least one from among the transformation coefficients and the samples has a predetermined bit depth or less.

公开(公告)号：US09402079B2

公开(公告)日：2016-07-26

申请号：US14802651

申请日：2015-07-17

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena Alshina ,  Alexander Alshin ,  Vadim Seregin ,  Nikolay Shlyakhov ,  Maxim Koroteev

IPC: H04N7/12 ,  H04N19/13 ,  H04N19/50 ,  H04N19/176 ,  H04N19/119 ,  H04N19/593 ,  H04N19/11 ,  H04N19/117 ,  H04N19/91 ,  H04N19/182 ,  H04N19/82 ,  H04N19/33 ,  H04N19/196

CPC classification number: H04N19/13 ,  H04N19/11 ,  H04N19/117 ,  H04N19/119 ,  H04N19/176 ,  H04N19/182 ,  H04N19/198 ,  H04N19/33 ,  H04N19/50 ,  H04N19/593 ,  H04N19/82 ,  H04N19/91

Abstract: A video encoding method and apparatus and a video decoding method and apparatus. In the video encoding method, a first predicted coding unit of a current coding unit that is to be encoded is produced, a second predicted coding unit is produced by changing a value of each pixel of the first predicted coding unit by using each pixel of the first predicted coding unit and at least one neighboring pixel of each pixel, and the difference between the current coding unit and the second predicted coding unit is encoded, thereby improving video prediction efficiency.

公开(公告)号：US09313520B2

公开(公告)日：2016-04-12

申请号：US14643766

申请日：2015-03-10

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena Alshina ,  Alexander Alshin

IPC: H04N19/00 ,  H04N19/523 ,  G06T3/40 ,  H04N19/61 ,  H04N19/117 ,  H04N19/182 ,  H04N19/167 ,  H04N19/59 ,  H04N19/537 ,  H04N19/52 ,  H04N19/82

CPC classification number: H04N19/523 ,  G06T3/4007 ,  H04N19/117 ,  H04N19/167 ,  H04N19/182 ,  H04N19/52 ,  H04N19/537 ,  H04N19/59 ,  H04N19/61 ,  H04N19/82

Abstract: A sub-pel-unit image interpolation method using a transformation-based interpolation filter includes, selecting, based on a sub-pel-unit interpolation location in a region supported by a plurality of interpolation filters for generating at least one sub-pel-unit pixel value located between integer-pel-unit pixels, one of a symmetric interpolation filter and an asymmetric interpolation filter from among the plurality of interpolation filters; and using the selected interpolation filter to generate the at least one sub-pel-unit pixel value by interpolating the integer-pel-unit pixels.

公开(公告)号：US20150237376A1

公开(公告)日：2015-08-20

申请号：US14432414

申请日：2013-09-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena Alshina ,  Alexander Alshin ,  Chan-yul Kim ,  Tammy Lee

IPC: H04N19/65 ,  H04N19/30 ,  H04N19/46 ,  H04N19/132 ,  H04N19/174 ,  H04N19/172 ,  H04N19/14 ,  H04N19/182 ,  H04N19/50 ,  H04N19/187

CPC classification number: H04N19/65 ,  H04N19/117 ,  H04N19/132 ,  H04N19/14 ,  H04N19/172 ,  H04N19/174 ,  H04N19/182 ,  H04N19/187 ,  H04N19/30 ,  H04N19/33 ,  H04N19/46 ,  H04N19/50 ,  H04N19/59 ,  H04N19/82 ,  H04N19/86

Abstract: Provided are scalable video encoding and decoding methods and apparatuses for compensating for inter-layer prediction errors between different layer images by using sample adaptive offsets (SAOs). The scalable video decoding method includes: obtaining inter-layer SAO use information indicating whether to compensate for prediction errors according to inter-layer prediction between a base layer reconstructed image and an enhancement layer prediction image, and SAO parameters indicating a SAO type of the enhancement layer prediction image and an offset, from a received enhancement layer stream; determining the SAO type of the enhancement layer prediction image and offsets corresponding to the prediction errors classified according to categories, from the obtained SAO parameters; and generating an enhancement layer reconstructed image by using the enhancement layer prediction image compensated by the determined offsets by determining a category of a current sample for each pixel location of the enhancement layer prediction image.

Abstract translation: 提供了通过使用采样自适应偏移（SAO）来补偿不同层图像之间的层间预测误差的可扩展视频编码和解码方法和装置。 可扩展视频解码方法包括：根据基层重构图像和增强层预测图像之间的层间预测，获得指示是否补偿预测误差的层间SAO使用信息，以及指示SAO类型增强的SAO参数 层预测图像和来自接收到的增强层流的偏移; 根据获得的SAO参数确定增强层预测图像的SAO类型和与根据类别分类的预测误差相对应的偏移量; 以及通过使用由所确定的偏移补偿的增强层预测图像，通过确定增强层预测图像的每个像素位置的当前样本的类别来生成增强层重建图像。

公开(公告)号：US20150181214A1

公开(公告)日：2015-06-25

申请号：US14415454

申请日：2013-07-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

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

IPC: H04N19/14 ,  H04N19/103 ,  H04N19/13 ,  H04N19/186

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.

Abstract translation: 本公开涉及确定为在视频编码和解码操作中最小化原始图像与重建图像之间的误差的样本自适应偏移（SAO）参数的信令。 SAO解码方法包括从最大编码单元（MCU）的比特流获得上下文编码的向左SAO合并信息和上下文编码的向上SAO合并信息; 从比特流获取关于每个颜色分量上下文编码的SAO开/关信息; 如果SAO开/关信息指示执行SAO操作，则从比特流获得关于每个颜色分量旁路编码的每个SAO类别的绝对偏移值信息; 并且从所述比特流获得关于每个颜色分量旁路编码的频带位置信息和边缘类信息之一。

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：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.