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：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：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.

公开(公告)号：US20160156912A1

公开(公告)日：2016-06-02

申请号：US14905525

申请日：2014-07-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Chan-yul KIM ,  Alexander ALSHIN

IPC: H04N19/187 ,  H04N19/105 ,  H04N19/117 ,  H04N19/159 ,  H04N19/137 ,  H04N19/44 ,  H04N19/463 ,  H04N19/59 ,  H04N19/593 ,  H04N19/80 ,  H04N19/33

CPC classification number: H04N19/187 ,  H04N19/105 ,  H04N19/117 ,  H04N19/137 ,  H04N19/159 ,  H04N19/33 ,  H04N19/44 ,  H04N19/463 ,  H04N19/59 ,  H04N19/593 ,  H04N19/80

Abstract: Provided is a video encoding method including determining a reference layer image from among base layer images, wherein the reference layer image corresponds to an enhancement layer image; determining a phase shift between pixels of the enhancement layer image and the reference layer image, according to a scaling factor between the enhancement layer image and the reference layer image and a color format of the enhancement layer; selecting at least one filter coefficient set corresponding to the phase shift, from filter coefficient data including filter coefficient sets; generating an up-sampled reference layer image by extending a resolution of the reference layer image according to the scaling factor by performing interpolation filtering on the reference layer image by using the filter coefficient set; obtaining a prediction error between the up-sampled reference layer image and the enhancement layer image; generating an enhancement layer bitstream including the prediction error and a scalable codec; and generating a base layer bitstream by encoding the base layer images.

Abstract translation: 提供了一种视频编码方法，包括从基础层图像中确定参考层图像，其中参考层图像对应于增强层图像; 根据增强层图像和参考层图像之间的比例因子和增强层的颜色格式，确定增强层图像和参考层图像的像素之间的相移; 从包括滤波器系数组的滤波器系数数据中选择对应于相移的至少一个滤波器系数集; 通过使用滤波器系数集对参考层图像执行插值滤波，通过根据缩放因子扩展参考层图像的分辨率来生成上采样参考层图像; 获得上采样参考层图像和增强层图像之间的预测误差; 生成包括预测误差和可伸缩编解码器的增强层比特流; 以及通过对基本层图像进行编码来生成基本层比特流。

公开(公告)号：US20160007032A1

公开(公告)日：2016-01-07

申请号：US14770311

申请日：2014-02-25

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Alexander ALSHIN

IPC: H04N19/187 ,  H04N19/80 ,  H04N19/176 ,  H04N19/52

CPC classification number: H04N19/187 ,  H04N19/103 ,  H04N19/117 ,  H04N19/157 ,  H04N19/176 ,  H04N19/33 ,  H04N19/52 ,  H04N19/573 ,  H04N19/59 ,  H04N19/61 ,  H04N19/80

Abstract: Provided are scalable video encoding and decoding methods for optimization of a memory bandwidth and a computational quantity when inter-layer prediction is performed.The scalable video encoding method includes determining a reference layer image from among base layer images so as to perform inter-layer prediction on an enhancement layer image, determining, using the enhancement layer image, not to perform inter prediction on enhancement layer images when an upsampled reference layer image is determined by performing inter-layer (IL) interpolation filtering on the reference layer image, and encoding a residue component between the upsampled reference layer image and the enhancement layer image.

Abstract translation: 提供了用于在执行层间预测时优化存储器带宽和计算量的可扩展视频编码和解码方法。 可扩展视频编码方法包括：从基层图像中确定参考层图像，以便对增强层图像执行层间预测;当增强层图像被上采样时，确定使用增强层图像不对增强层图像执行帧间预测 通过对参考层图像执行层间（IL）内插滤波，并对上采样的参考层图像和增强层图像之间的残差分量进行编码来确定参考层图像。

公开(公告)号：US20150237358A1

公开(公告)日：2015-08-20

申请号：US14632169

申请日：2015-02-26

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Alexander ALSHIN ,  Elena ALSHINA ,  Jianle CHEN ,  Woo-jin HAN ,  Nikolay SHLYAKHOV ,  Yoon-mi HONG

IPC: H04N19/43 ,  H04N19/523 ,  H04N19/186 ,  H04N19/82 ,  H04N19/117 ,  H04N19/182 ,  H04N19/59

CPC classification number: H04N19/86 ,  G06F17/17 ,  G06F17/175 ,  G06T3/4007 ,  G06T5/002 ,  H04N19/117 ,  H04N19/182 ,  H04N19/186 ,  H04N19/42 ,  H04N19/43 ,  H04N19/521 ,  H04N19/523 ,  H04N19/59 ,  H04N19/635 ,  H04N19/80 ,  H04N19/82

Abstract: Provided are a method of interpolating an image by determining interpolation filter coefficients, and an apparatus for performing the same. The method includes: differently selecting an interpolation filter, from among interpolation filters for generating at least one sub-pel-unit pixel value located between integer-pel-unit pixels, based on a sub-pel-unit interpolation location and a smoothness; and generating the at least one sub-pel-unit pixel value by interpolating, using the selected interpolation filter, pixel values of the integer-pel-unit pixels.

Abstract translation: 提供了一种通过确定内插滤波器系数来内插图像的方法，以及用于执行图像的装置。 该方法包括：基于子像素单位内插位置和平滑度，从用于产生位于整数像素单位像素之间的至少一个子像素单位像素值的内插滤波器中不同地选择内插滤波器; 以及通过使用所选择的内插滤波器内插所述整数像素单位像素的像素值来生成所述至少一个子像素单位像素值。

公开(公告)号：US20150189316A1

公开(公告)日：2015-07-02

申请号：US14644652

申请日：2015-03-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Alexander ALSHIN

IPC: H04N19/523 ,  H04N19/82 ,  H04N19/52

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：US20150189294A1

公开(公告)日：2015-07-02

申请号：US14658963

申请日：2015-03-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Alexander ALSHIN ,  Elena ALSHINA ,  Nikolay SHLYAKHOV

IPC: H04N19/182 ,  H04N19/117

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.

公开(公告)号：US20150181251A1

公开(公告)日：2015-06-25

申请号：US14641709

申请日：2015-03-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Elena ALSHINA ,  Alexander ALSHIN

IPC: H04N19/86 ,  H04N19/91

CPC classification number: H04N19/13 ,  H04N19/117 ,  H04N19/136 ,  H04N19/157 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/44 ,  H04N19/46 ,  H04N19/82 ,  H04N19/86 ,  H04N19/91

Abstract: A video encoding method and apparatus, and a video decoding method and apparatus for generating a reconstructed image having a minimized error between an original image and the reconstructed image. The video decoding method accompanied by a sample adaptive offset (SAO) adjustment, the method includes: obtaining 5 slice SAO parameters with respect to a current slice from a slice header of a received bitstream; obtaining luma SAO use information for a luma component of the current slice and chroma SAO use information for chroma components thereof from among the slice SAO parameters; determining whether to perform a SAO operation on the luma component of 10 the current slice based on the obtained luma SAO use information; and equally determining whether to perform the SAO adjustment on a first chroma component and a second chroma component of the current slice based on the obtained chroma SAO use information.

公开(公告)号：US20150181235A1

公开(公告)日：2015-06-25

申请号：US14603307

申请日：2015-01-22

Applicant: Samsung Electronics Co., LTD.

Inventor： Elena ALSHINA ,  Alexander ALSHIN

IPC: H04N19/60 ,  H04N19/44

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.

Abstract translation: 提供了一种在编码样本恢复期间调整编码输出数据的范围以调整位深度的视频编码方法，以及在解码处理的操作中基本上防止在输出数据中发生溢出的视频解码方法。 视频解码方法包括以接收到的比特流解码和恢复图像块的量化变换系数，通过对量化的变换系数执行逆量化来恢复变换系数，以及通过执行一维（1D）逆变换来恢复样本， 对量化变换系数进行反缩放。 变换系数和样本中的至少一个具有预定位深度或更小。