公开(公告)号：US10575015B2

公开(公告)日：2020-02-25

申请号：US14605201

申请日：2015-01-26

Applicant: KT CORPORATION

Inventor： Bae Keun Lee ,  Jae Cheol Kwon ,  Joo Young Kim

IPC: H04N19/61 ,  H04N19/12 ,  H04N19/625 ,  H04N19/44 ,  H04N19/176 ,  H04N19/122 ,  H04N19/157 ,  H04N19/18 ,  H04N19/194 ,  H04N19/96 ,  H04N19/513 ,  H04N19/124 ,  H04N19/147

Abstract: The present invention relates to a technique for encoding and decoding an image, and a method for encoding the image, according to the present invention, comprises the steps of: performing a prediction with respect to a current block; and transforming a residual which is generated by the prediction, wherein in the step of transforming, a first transform is performed on the residual, and then a second transform is performed on a lower frequency area, and wherein a mode of the second transform can be decided on the basis of a mode of the first transform.

公开(公告)号：US10419759B2

公开(公告)日：2019-09-17

申请号：US16041989

申请日：2018-07-23

Applicant: KT CORPORATION

Inventor： Bae Keun Lee ,  Jae Cheol Kwon ,  Joo Young Kim

IPC: H04N19/11 ,  H04N19/12 ,  H04N19/122 ,  H04N19/124 ,  H04N19/129 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44 ,  H04N19/593 ,  H04N19/61 ,  H04N19/625 ,  H04N19/86 ,  H04N19/91

Abstract: Disclosed is an adaptive transform method based on an in-screen prediction, and an apparatus using the method. A method for encoding an image can comprise a step of determining in-screen prediction mode groups, and a step of transforming by using a different transform method according to the in-screen prediction mode group. As a result, transforming can be performed by applying the different transform method according to the in-screen prediction mode group.

公开(公告)号：US09866832B2

公开(公告)日：2018-01-09

申请号：US15044091

申请日：2016-02-15

Applicant: KT CORPORATION

Inventor： Bae Keun Lee ,  Jae Cheol Kwon ,  Joo Young Kim

IPC: H04N19/44 ,  H04N19/61 ,  H04N19/124 ,  H04N19/593 ,  H04N19/176 ,  H04N19/136 ,  H04N19/107 ,  H04N19/159 ,  H04N19/122 ,  H04N19/11 ,  H04N19/103 ,  H04N19/12 ,  H04N19/186 ,  H04N19/105 ,  H04N19/139 ,  H04N19/18 ,  H04N19/13 ,  H04N19/42 ,  H04N19/182

CPC classification number: H04N19/107 ,  H04N19/103 ,  H04N19/105 ,  H04N19/11 ,  H04N19/12 ,  H04N19/122 ,  H04N19/124 ,  H04N19/13 ,  H04N19/136 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/186 ,  H04N19/439 ,  H04N19/44 ,  H04N19/593 ,  H04N19/61

Abstract: Provided is a method for decoding an image. The method may include: deciding a prediction mode that corresponds to a chroma component block; deciding a transform skip mode of the chroma component block from a plurality of transform skip mode candidates, according to the prediction mode that corresponds to the chroma component block; and reverse-transforming the chroma component block on the basis of the transform skip mode that is decided.

公开(公告)号：US09729893B2

公开(公告)日：2017-08-08

申请号：US15393826

申请日：2016-12-29

Applicant: KT CORPORATION

Inventor： Bae Keun Lee ,  Jae Cheol Kwon ,  Joo Young Kim

IPC: H04N19/00 ,  H04N19/44 ,  H04N19/105 ,  H04N19/117 ,  H04N19/119 ,  H04N19/176 ,  H04N19/503

CPC classification number: H04N19/44 ,  H04N19/105 ,  H04N19/117 ,  H04N19/119 ,  H04N19/124 ,  H04N19/129 ,  H04N19/13 ,  H04N19/134 ,  H04N19/136 ,  H04N19/159 ,  H04N19/167 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/45 ,  H04N19/46 ,  H04N19/50 ,  H04N19/503 ,  H04N19/52 ,  H04N19/61 ,  H04N19/82

Abstract: The present invention discloses a method and an apparatus for encoding and decoding video. A video decoding method comprises reconstructing a residual value by entropy-decoding received bitstream and dequantizing and inverse-transforming residual value information, generating a final prediction unit by performing inter prediction on a prediction unit which is partitioned from a coding unit into at least two prediction units by asymmetric motion partitioning (AMP), the two partitioned prediction units comprising a first partitioned prediction unit and a second partitioned prediction unit, and reconstructing a picture by adding the final prediction unit to the residual values.

公开(公告)号：US09578348B2

公开(公告)日：2017-02-21

申请号：US15184087

申请日：2016-06-16

Applicant: KT CORPORATION

Inventor： Bae Keun Lee ,  Jae Cheol Kwon ,  Joo Young Kim

IPC: H04N19/593 ,  H04N19/44 ,  H04N19/52 ,  H04N19/61 ,  H04N19/82 ,  H04N19/436 ,  H04N19/176 ,  H04N19/182 ,  H04N19/513 ,  H04N19/51 ,  H04N19/122 ,  H04N19/137 ,  H04N19/91

CPC classification number: H04N19/44 ,  H04N19/122 ,  H04N19/137 ,  H04N19/176 ,  H04N19/182 ,  H04N19/436 ,  H04N19/51 ,  H04N19/513 ,  H04N19/52 ,  H04N19/593 ,  H04N19/61 ,  H04N19/82 ,  H04N19/91

Abstract: The present invention relates to a method for inducing a merge candidate block and a device using same. An image decoding method involves decoding motion estimation region (MER) related information; determining whether or not a predicted target block and a spatial merge candidate block are included in the same MER; and determining the spatial merge candidate block to be an unavailable merge candidate block when the predicted target block and the spatial merge candidate block are included in the same MER. Accordingly, by parallely performing the method for inducing a merge candidate, parallel processing is enabled and the computation amount and implementation complexity are reduced.

公开(公告)号：US09445123B2

公开(公告)日：2016-09-13

申请号：US14968958

申请日：2015-12-15

Applicant: KT CORPORATION

Inventor： Jae Cheol Kwon ,  Joo Young Kim

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/11 ,  H04N19/44 ,  H04N19/50 ,  H04N19/117 ,  H04N19/124 ,  H04N19/18 ,  H04N19/182 ,  H04N19/61

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/11 ,  H04N19/117 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/44 ,  H04N19/50 ,  H04N19/593 ,  H04N19/61 ,  H04N19/91

Abstract: The present invention relates to a method and apparatus for intra prediction. The intra prediction method for a decoder, according to the present invention, comprises the steps of entropy-decoding a received bitstream, generating reference pixels to be used in the intra prediction of a prediction unit; generating a prediction block from the reference pixels on the basis of a prediction mode for the prediction unit and reconstructing an image from the prediction block and a residual block, which is obtained as a result of entropy encoding, wherein the reference pixels and/or the prediction block pixels are predicted on the basis of a base pixel, and the predicted pixel value can be the sum of the pixel value of the base pixel and the difference between the pixel values of the base pixel and the generated pixel.

公开(公告)号：US09432683B2

公开(公告)日：2016-08-30

申请号：US14357056

申请日：2012-11-02

Applicant: KT CORPORATION

Inventor： Bae Keun Lee ,  Jae Cheol Kwon ,  Joo Young Kim

IPC: H04N19/00 ,  H04N19/50 ,  H04N19/176 ,  H04N19/117 ,  H04N19/82 ,  H04N19/46 ,  H04N19/44 ,  H04N19/119 ,  H04N19/13 ,  H04N19/61 ,  H04N19/105 ,  H04N19/52 ,  H04N19/129 ,  H04N19/136 ,  H04N19/167

CPC classification number: H04N19/44 ,  H04N19/105 ,  H04N19/117 ,  H04N19/119 ,  H04N19/124 ,  H04N19/129 ,  H04N19/13 ,  H04N19/134 ,  H04N19/136 ,  H04N19/159 ,  H04N19/167 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/45 ,  H04N19/46 ,  H04N19/50 ,  H04N19/503 ,  H04N19/52 ,  H04N19/61 ,  H04N19/82

Abstract: The present invention discloses a method and an apparatus for encoding and decoding video. A video decoding method comprises reconstructing a residual value by entropy-decoding received bitstream and dequantizing and inverse-transforming residual value information, generating a final prediction unit by performing inter prediction on a prediction unit which is partitioned from a coding unit into at least two prediction units by asymmetric motion partitioning (AMP), the two partitioned prediction units comprising a first partitioned prediction unit and a second partitioned prediction unit, and reconstructing a picture by adding the final prediction unit to the residual values.

Abstract translation: 本发明公开了一种编码和解码视频的方法和装置。 一种视频解码方法包括：通过熵解码接收到的比特流并对残差值信息进行逆量化和逆变换来重建残余值，通过对从编码单元划分的预测单元进行帧间预测，生成最终预测单元，形成至少两个预测 所述两个划分预测单元包括第一分区预测单元和第二分区预测单元，并且通过将最终预测单元与残差值相加来重构图像。

公开(公告)号：US09432669B2

公开(公告)日：2016-08-30

申请号：US14983745

申请日：2015-12-30

Applicant: KT Corporation

Inventor： Jae Cheol Kwon ,  Joo Young Kim

IPC: H04N19/50 ,  H04N19/44 ,  H04N19/11 ,  H04N19/593 ,  H04N19/176 ,  H04N19/91 ,  H04N19/182

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/11 ,  H04N19/117 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/44 ,  H04N19/50 ,  H04N19/593 ,  H04N19/61 ,  H04N19/91

Abstract: The present invention relates to a method and apparatus for intra prediction. The intra prediction method for a decoder, according to the present invention, comprises the steps of entropy-decoding a received bitstream, generating reference pixels to be used in the intra prediction of a prediction unit; generating a prediction block from the reference pixels on the basis of a prediction mode for the prediction unit and reconstructing an image from the prediction block and a residual block, which is obtained as a result of entropy encoding, wherein the reference pixels and/or the prediction block pixels are predicted on the basis of a base pixel, and the predicted pixel value can be the sum of the pixel value of the base pixel and the difference between the pixel values of the base pixel and the generated pixel.

公开(公告)号：US09300974B2

公开(公告)日：2016-03-29

申请号：US14605302

申请日：2015-01-26

Applicant: KT CORPORATION

Inventor： Bae Keun Lee ,  Jae Cheol Kwon ,  Joo Young Kim

IPC: H04N19/12 ,  H04N19/18 ,  H04N19/103 ,  H04N19/159 ,  H04N19/122 ,  H04N19/61 ,  H04N19/11 ,  H04N19/186 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176

CPC classification number: H04N19/107 ,  H04N19/103 ,  H04N19/105 ,  H04N19/11 ,  H04N19/12 ,  H04N19/122 ,  H04N19/124 ,  H04N19/13 ,  H04N19/136 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/186 ,  H04N19/439 ,  H04N19/44 ,  H04N19/593 ,  H04N19/61

Abstract: A method for decoding an image, according to the present invention, comprises the steps of: deciding a prediction mode that corresponds to a chroma component block; deciding a transform skip mode of the chroma component block from a plurality of transform skip mode candidates, according to the prediction mode that corresponds to the chroma component block; and reverse-transforming the chroma component block on the basis of the transform skip mode that is decided.

公开(公告)号：US20140269915A1

公开(公告)日：2014-09-18

申请号：US14353288

申请日：2012-10-17

Applicant: KT CORPORATION

Inventor： Bae Keun Lee ,  Jae Cheol Kwon ,  Joo Young Kim

IPC: H04N19/61

CPC classification number: H04N19/60 ,  H04N19/11 ,  H04N19/117 ,  H04N19/12 ,  H04N19/122 ,  H04N19/124 ,  H04N19/13 ,  H04N19/147 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/513 ,  H04N19/61 ,  H04N19/70 ,  H04N19/86 ,  H04N19/90 ,  H04N19/91

Abstract: A method for decoding an image, according to the present invention, comprises the steps of: receiving image information that corresponds to a block to be decoded; performing entropy-decoding with respect to the image information that is received; deciding a transform skip mode of the block to be decoded from a plurality of transform skip mode candidates, based on the image information that is entropy-decoded; and reverse-transforming the block to be decoded based on the transform skip mode that is decided.

Abstract translation: 根据本发明的用于解码图像的方法包括以下步骤：接收对应于要解码的块的图像信息; 对所接收的图像信息执行熵解码; 基于被熵解码的图像信息，从多个变换跳过模式候选中确定要解码的块的变换跳过模式; 并且基于所决定的变换跳过模式反转变换要解码的块。