公开(公告)号：US11032554B2

公开(公告)日：2021-06-08

申请号：US15513230

申请日：2015-09-23

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sang-kwon Na ,  Sung-oh Kim ,  Jae-moon Kim ,  Ki-won Yoo

IPC: H04N19/176 ,  H04N19/423 ,  H04N19/58 ,  H04N19/513 ,  H04N19/172 ,  H04N19/517 ,  H04N19/61 ,  H04N19/91 ,  H04N19/46

Abstract: Provided is a video decoding method for reconstructing an image, the video decoding method including: obtaining reference image data from a bitstream; determining an attribute of the reference image data as a long-term reference attribute or a short-term reference attribute, according to a frequency of referring to the reference image data by image data to be decoded; storing the reference image data in a memory by using the attribute of the reference image data; and decoding an image by using the reference image data stored in the memory.

公开(公告)号：US10291915B2

公开(公告)日：2019-05-14

申请号：US14640621

申请日：2015-03-06

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jae-moon Kim ,  Ki-won Yoo ,  Chang-su Han ,  Sang-kwon Na ,  Hyung-ju Chun

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/167 ,  H04N19/17

Abstract: A video encoding method includes: receiving an image; up-sampling the received image; and changing a sample value of an up-sampling region included in the up-sampled image and encoding the up-sampled image by using the changed sample value, wherein the up-sampling region is a region inserted into the received image by the up-sampling.

公开(公告)号：US11057616B2

公开(公告)日：2021-07-06

申请号：US15735042

申请日：2016-06-08

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION

Inventor： Sang-kwon Na ,  Soo-ik Chae ,  Ki-won Yoo ,  Jae-moon Kim ,  Woo-seok Jeong

IPC: H04N11/02 ,  H04N19/103 ,  H04N19/176 ,  H04N19/59

Abstract: Provided is a video decoding method including obtaining a residue of a first bit-depth with respect to a current block by decoding a bitstream; when intra predicting the current block, generating a prediction block of the current block by using a block that is previously decoded at the first bit-depth and then stored in a buffer; and generating a reconstruction block of the first bit-depth by using the prediction block and the residue of the first bit-depth. When the current block is inter predicted, the video decoding method may further include generating a prediction block of a second bit-depth by using an image previously decoded at the second bit-depth, and generating the prediction block of the current block by changing the generated prediction block of the second bit-depth to the first bit-depth. The first bit-depth is higher than the second bit-depth.

公开(公告)号：US10244247B2

公开(公告)日：2019-03-26

申请号：US15251476

申请日：2016-08-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Chan-sik Park ,  Myung-ho Kim ,  Sang-kwon Na ,  Ki-won Yoo ,  Chang-su Han

IPC: H04N19/436 ,  H04N19/523 ,  H04N19/80 ,  H04N19/105 ,  H04N19/13 ,  H04N19/124 ,  H04N19/433 ,  H04N19/17 ,  H04N19/176 ,  H04N19/182

Abstract: Provided are a method and an apparatus for decoding an image by accessing a memory by a block group. The method comprises checking information regarding a size of one or more blocks included in a bitstream of an encoded image, determining whether to group one or more blocks for performing decoding, based on the information regarding the size of the one or more blocks, setting a block group including one or more blocks based on the information regarding the size of the one or more blocks, and accessing a memory by the block group to perform a parallel-pipeline decoding process by the block group.

公开(公告)号：US20190222840A1

公开(公告)日：2019-07-18

申请号：US16363720

申请日：2019-03-25

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sung-dae KIM ,  Ki-won YOO ,  Jae-moon Kim ,  Sang-kwon Na

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/157 ,  H04N19/13 ,  H04N19/182 ,  H04N19/176

Abstract: A video encoding apparatus comprises an encoder encoding input video; a decoder decoding video data, and a filter to compensate for a pixel value of the encoded video data. An adaptive loop filter (ALF) parameter predictor generates an ALF filter parameter using the decoded video data. The ALF filter parameter is applied to an ALF filter to compensate a current pixel by using a pixel adjacent to the current pixel and a filter coefficient with respect to the neighboring pixel; a sample adaptive offset (SAO) filter unit applied to the decoded video data compensates for a current pixel by using at least one of an edge offset and a band offset; an ALF filter unit applies the ALF filter parameter, the ALF filter to video data to which the SAO filter has been applied; and an entropy encoder performs entropy encoding on the ALF filter parameter.

公开(公告)号：US10321155B2

公开(公告)日：2019-06-11

申请号：US15321988

申请日：2015-06-26

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-won Yoo ,  Jae-moon Kim ,  Sang-kwon Na

IPC: H04N19/59 ,  H04N19/172 ,  H04N19/119 ,  H04N19/96 ,  H04N19/157

Abstract: Provided is a video encoding method including: performing padding outside an input image such that a size of the input image is a multiple of a maximum coding unit; when a current maximum coding unit includes a padding area generated via the padding, determining a coding unit by splitting the current maximum coding unit by using a boundary of the input image and the padding area; determining information indicating whether a coding unit included in the padding area includes a nonzero coefficient to be 0; and encoding a bitstream including the determined information.

公开(公告)号：US09936223B2

公开(公告)日：2018-04-03

申请号：US14336326

申请日：2014-07-21

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sang-kwon Na ,  Ki-won Yoo ,  Jae-Hyun Kim ,  Kyo-hyuk Lee

IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/593 ,  H04N19/436 ,  H04N19/46 ,  H04N19/96

CPC classification number: H04N19/593 ,  H04N19/436 ,  H04N19/46 ,  H04N19/96

Abstract: Provided are a method and a device for encoding a video to improve an intra prediction processing speed, and a method and a device for decoding the video. The method for encoding a video performs parallel intra prediction and includes: obtaining, by using pixels of peripheral blocks processed prior to a plurality of adjacent blocks, reference pixels used for intra prediction of each of the plurality of adjacent blocks; performing, by using the obtained reference pixels, intra prediction in parallel for each of the plurality of adjacent blocks; and adding reference pixel syntax information to a bitstream.

公开(公告)号：US10701357B2

公开(公告)日：2020-06-30

申请号：US16363720

申请日：2019-03-25

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sung-dae Kim ,  Ki-won Yoo ,  Jae-moon Kim ,  Sang-kwon Na

IPC: H04N7/12 ,  H04N19/117 ,  H04N19/157 ,  H04N19/82 ,  H04N19/13 ,  H04N19/176 ,  H04N19/182

Abstract: A video encoding apparatus comprises an encoder encoding input video; a decoder decoding video data, and a filter to compensate for a pixel value of the encoded video data. An adaptive loop filter (ALF) parameter predictor generates an ALF filter parameter using the decoded video data. The ALF filter parameter is applied to an ALF filter to compensate a current pixel by using a pixel adjacent to the current pixel and a filter coefficient with respect to the neighboring pixel; a sample adaptive offset (SAO) filter unit applied to the decoded video data compensates for a current pixel by using at least one of an edge offset and a band offset; an ALF filter unit applies the ALF filter parameter, the ALF filter to video data to which the SAO filter has been applied; and an entropy encoder performs entropy encoding on the ALF filter parameter.

公开(公告)号：US10277917B2

公开(公告)日：2019-04-30

申请号：US15174157

申请日：2016-06-06

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  Seoul National University R&DB Foundation

Inventor： Sang-kwon Na ,  Soo-ik Chae ,  Ki-won Yoo ,  Soon-woo Choi ,  Woo-seok Jeong

IPC: H04N19/61 ,  H04N19/124 ,  H04N19/176 ,  H04N19/567

Abstract: An image encoding method includes generating symbols by performing transformation and quantization according to a transformation block, on a block that performs prediction according to a prediction mode; updating a probability index of a current sub block by using a probability index of a previous sub block among sub blocks included in the transformation block; determining a rate according to a bit length of the current sub block by using the probably index; determining a rate of the transformation block by using rates of the sub blocks; determining a distortion by using a difference between an original image and a reconstruction image according to transformation and quantization; and determining a rate-distortion (R-D) cost by using the distortion and the rate.

公开(公告)号：US09591307B2

公开(公告)日：2017-03-07

申请号：US14464942

申请日：2014-08-21

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sang-kwon Na ,  Ki-won Yoo

IPC: H04N19/11 ,  H04N19/119 ,  H04N19/172 ,  H04N19/96 ,  H04N19/14

CPC classification number: H04N19/11 ,  H04N19/119 ,  H04N19/14 ,  H04N19/172 ,  H04N19/96

Abstract: Provided are a method and an apparatus for determining an intra prediction mode. The method includes: splitting a maximum coding unit into coding units of a first size; acquiring an edge direction of each of the coding units of the first size; grouping adjacent coding units of the first size based on uniformity of edge directions of the adjacent coding units of the first size; determining a size range of coding units to be applied to intra prediction on the intra prediction coding unit group; performing the intra prediction on the intra prediction coding unit group by using coding units having sizes included in the determined size range; and determining a coding unit for the intra prediction and an intra prediction mode of the coding unit by comparing costs according to the performed intra prediction on the coding units having the sizes included in the size range.

Abstract translation: 提供了一种用于确定帧内预测模式的方法和装置。 该方法包括：将最大编码单元分割为第一大小的编码单元; 获取第一尺寸的每个编码单元的边缘方向; 基于第一尺寸的相邻编码单元的边缘方向的均匀性来分组第一尺寸的相邻编码单元; 确定要在帧内预测编码单元组中应用于帧内预测的编码单元的大小范围; 通过使用包含在确定的尺寸范围内的尺寸的编码单元来对帧内预测编码单元组进行帧内预测; 以及通过根据所执行的帧内预测对具有包括在尺寸范围内的尺寸的编码单元进行比较来确定编码单元的帧内预测编码单元和帧内预测模式。