公开(公告)号：US11601649B2

公开(公告)日：2023-03-07

申请号：US17580810

申请日：2022-01-21

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung Chang Lim ,  Hui Yong Kim ,  Se Yoon Jeong ,  Suk Hee Cho ,  Jong Ho Kim ,  Ha Hyun Lee ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim ,  Chie Teuk Ahn

IPC: H04N19/00 ,  H04N19/124 ,  H04N19/196 ,  H04N19/463 ,  H04N19/176 ,  H04N19/70 ,  H04N19/119 ,  H04N19/14 ,  H04N19/33

Abstract: A method for decoding an image, the method including receiving a bitstream including image information, decoding base block size information on a size of a base block, and a residual quantization parameter of a decoding object unit, from the bitstream, deriving a predicted quantization parameter of the decoding object unit based on the base block size information, deriving a quantization parameter of the decoding object unit based on the predicted quantization parameter and the residual quantization parameter, and decoding the decoding object unit based on the quantization parameter of the decoding object unit.

公开(公告)号：US11595655B2

公开(公告)日：2023-02-28

申请号：US17130042

申请日：2020-12-22

Applicant: Electronics and Telecommunications Research Institute ,  UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY

Inventor： Hui Yong Kim ,  Sung Chang Lim ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim ,  Gwang Hoon Park ,  Kyung Yong Kim

IPC: H04N19/129 ,  H04N19/176 ,  H04N19/70 ,  H04N19/122 ,  H04N19/159 ,  H04N19/119 ,  H04N19/136 ,  H04N19/61 ,  H04N19/593 ,  H04N19/625 ,  H04N19/124 ,  H04N19/157 ,  H04N19/44

Abstract: A method and a device for encoding/decoding images are disclosed. The method for encoding images comprises the steps of: deriving a scan type of a residual signal for a current block according to whether or not the current block is a transform skip block; and applying the scan type to the residual signal for the current block, wherein the transform skip block is a block to which transform for the current block is not applied and is specified on the basis of information indicating whether or not transform for the current block is to be applied.

公开(公告)号：US11470342B2

公开(公告)日：2022-10-11

申请号：US17214040

申请日：2021-03-26

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung Chang Lim ,  Hui Yong Kim ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim

IPC: H04N19/52

Abstract: A method for decoding an image according to the present invention comprises the steps of: decoding a residual block by quantizing and inverse transforming an entropy-decoded residual block; generating a prediction block via motion compensation; and decoding an image by adding the decoded residual block to the prediction block, wherein on the basis of the maximum number of motion vector candidates of the motion vector candidate list related to the prediction block, a motion vector candidate list is adjusted by adding a particular motion vector candidate or by discarding a portion from among the motion vector candidates, and in the prediction block generation step, a prediction motion vector of the prediction block is determined on the basis of the adjusted motion vector candidate list. Accordingly, the complexity of arithmetic operations is reduced during encoding/decoding of an image.

公开(公告)号：US11412240B2

公开(公告)日：2022-08-09

申请号：US17018245

申请日：2020-09-11

Applicant: Electronics and Telecommunications Research Institute ,  KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION

Inventor： Ha Hyun Lee ,  Jung Won Kang ,  Jin Soo Choi ,  Jin Woong Kim ,  Dong Gyu Sim ,  Hyo Min Choi ,  Jung Hak Nam

IPC: H04N19/30 ,  H04N19/11 ,  H04N19/176 ,  H04N19/187 ,  H04N19/33 ,  H04N19/503 ,  H04N19/59 ,  H04N19/103 ,  H04N19/36

Abstract: The present invention relates to a method and an apparatus for interlayer prediction, and the method for interlayer prediction, according to the present invention, comprises the steps of: deciding whether to apply an interlayer prediction to an enhancement layer; and performing a prediction on a current block of the enhancement layer based on reference information that is generalized and generated from a reference picture, which is decoded, of a reference layer, when the interlayer prediction is applied, wherein the reference layer information can be encoding information of a reference block, which corresponds to a current block of the enhancement layer, from the reference layer, and residual information.

公开(公告)号：US11350125B2

公开(公告)日：2022-05-31

申请号：US17138426

申请日：2020-12-30

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jin Ho Lee ,  Hui Yong Kim ,  Sung Chang Lim ,  Jong Ho Kim ,  Ha Hyun Lee ,  Jin Soo Choi ,  Jin Woong Kim

IPC: H04N19/593

Abstract: The multi sample prediction method of the present invention comprises the steps of: determining a sample group consisting of a plurality of samples inside a decoding target block; determining a representative position corresponding to the sample group, inside the decoding target block; determining a representative prediction value for the sample group, on the basis of the determined representative position; and determining the determined representative prediction value as the final prediction value for each of the plurality of samples making up the sample group. The present invention enhances efficiency in encoding/decoding and reduces complexity thereof.

公开(公告)号：US20220094963A1

公开(公告)日：2022-03-24

申请号：US17544709

申请日：2021-12-07

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hui Yong Kim ,  Jin Ho Lee ,  Sung Chang Lim ,  Jin Soo Choi ,  Jin Woong Kim

IPC: H04N19/51 ,  H04N19/196 ,  H04N19/82 ,  H04N19/513 ,  H04N19/593 ,  H04N19/105 ,  H04N19/182 ,  H04N19/42 ,  H04N19/52

Abstract: An image decoding method according to the present invention includes reconstructing a residual block by inverse-quantizing and inverse-transforming an entropy-decoded residual block, generating a prediction block by performing intra prediction on a current block, and reconstructing an picture by adding the reconstructed residual block to the prediction block, wherein generating the prediction block includes generating a final prediction value of a prediction target pixel included in the current block based on a first prediction value of the prediction target pixel and a final correction value calculated by performing an arithmetic right shift on a two's complementary integer representation for an initial correction value of the prediction target pixel by a binary digit of 1. Accordingly, upon image encoding/decoding, computation complexity may be reduced.

公开(公告)号：US20220086479A1

公开(公告)日：2022-03-17

申请号：US17538797

申请日：2021-11-30

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung Chang Lim ,  Hui Yong Kim ,  Se Yoon Jeong ,  Suk Hee Cho ,  Dong San Jun ,  Jong Ho Kim ,  Ha Hyun Lee ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim

IPC: H04N19/513 ,  H04N19/61 ,  H04N19/44 ,  H04N19/426

Abstract: The present invention relates to image processing, and more particularly, to a video coding/decoding method using a clipped motion vector and an apparatus thereof. An embodiment of the present invention relates to a method of decoding an image. The method includes clipping a motion vector of a reference picture in a predetermined dynamic range to generate a clipped motion vector, storing the clipped motion vector in a buffer, deriving a motion vector of a coding treeblock using the motion vector stored in the buffer, and performing inter prediction decoding process using the motion vector of the coding treeblock. According to the exemplary embodiment of the present invention, a size of a memory required for storing motion vectors may be reduced.

公开(公告)号：US11228778B2

公开(公告)日：2022-01-18

申请号：US17028678

申请日：2020-09-22

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hui Yong Kim ,  Jin Ho Lee ,  Sung Chang Lim ,  Jin Soo Choi ,  Jin Woong Kim

IPC: H04N19/51 ,  H04N19/196 ,  H04N19/82 ,  H04N19/513 ,  H04N19/593 ,  H04N19/105 ,  H04N19/182 ,  H04N19/42 ,  H04N19/52

Abstract: An image decoding method according to the present invention includes reconstructing a residual block by inverse-quantizing and inverse-transforming an entropy-decoded residual block, generating a prediction block by performing intra prediction on a current block, and reconstructing an picture by adding the reconstructed residual block to the prediction block, wherein generating the prediction block includes generating a final prediction value of a prediction target pixel included in the current block based on a first prediction value of the prediction target pixel and a final correction value calculated by performing an arithmetic right shift on a two's complementary integer representation for an initial correction value of the prediction target pixel by a binary digit of 1. Accordingly, upon image encoding/decoding, computation complexity may be reduced.

公开(公告)号：US11212526B2

公开(公告)日：2021-12-28

申请号：US16691203

申请日：2019-11-21

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jin Ho Lee ,  Jung Won Kang ,  Ha Hyun Lee ,  Jin Soo Choi ,  Jin Woong Kim

IPC: H04N19/117 ,  H04N19/105 ,  H04N19/124 ,  H04N19/176 ,  H04N19/30 ,  H04N19/14 ,  H04N19/80 ,  H04N19/13 ,  H04N19/159 ,  H04N19/51 ,  H04N19/61 ,  H04N19/172

Abstract: A video decoding method according to an embodiment of the present invention may include determining a type of a filter to be applied to a first-layer picture which a second-layer picture as a decoding target refers to; determining a filtering target of the first-layer picture to which the filter is applied; filtering the filtering target based on the type of the filter; and adding the filtered first-layer picture to a second-layer reference picture list. Accordingly, the video decoding method and an apparatus using the same may reduce a prediction error in an upper layer and enhance encoding efficiency.

公开(公告)号：US11082686B2

公开(公告)日：2021-08-03

申请号：US15897512

申请日：2018-02-15

Applicant: Electronics and Telecommunications Research Institute ,  University-Industry Cooperation Group of Kyung Hee University

Inventor： Se Yoon Jeong ,  Hui Yong Kim ,  Sung Chang Lim ,  Jin Ho Lee ,  Ha Hyun Lee ,  Jong Ho Kim ,  Jin Soo Choi ,  Jin Woong Kim ,  Chie Teuk Ahn ,  Gwang Hoon Park ,  Kyung Yong Kim ,  Han Soo Lee ,  Tae Ryong Kim

IPC: H04N19/10 ,  H04N19/105 ,  H04N19/136 ,  H04N19/196 ,  H04N19/61 ,  H04N19/46

Abstract: According to one embodiment of the present invention, a video information encoding method comprises: a step of predicting information of the current coding unit to generate prediction information; and a step of determining whether the information of the current coding unit coincides with the prediction information. If the information of the current coding unit coincides with the prediction information, a flag indicating that the information of the current coding unit coincides with the prediction information is encoded and transmitted. If the information of the current coding unit does not coincide with the prediction information, a flag indicating that the information of the current coding unit does not coincide with the prediction information is encoded and transmitted and the information of the current coding unit is encoded and transmitted. In the step of generating prediction information, the prediction information may be generated using the information on the coding unit adjacent to the current coding unit.