公开(公告)号：US10455241B2

公开(公告)日：2019-10-22

申请号：US16136415

申请日：2018-09-20

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/187 ,  H04N19/70 ,  H04N19/30

Abstract: Disclosed are an image encoding/decoding method and device supporting a plurality of layers. The image decoding method supporting the plurality of layers comprises the steps of; receiving a bitstream comprising the plurality of layers; and decoding the bitstream so as to acquire maximum number information about sublayers with respect to each of the plurality of layers.

公开(公告)号：US10455232B2

公开(公告)日：2019-10-22

申请号：US16034506

申请日：2018-07-13

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/126 ,  H04N19/176 ,  H04N19/70 ,  H04N19/129 ,  H04N19/61 ,  H04N19/463 ,  H04N19/18 ,  H04N19/44 ,  H04N19/60 ,  H04N19/96

Abstract: A method and a device for encoding/decoding an image are disclosed. The method for decoding an image comprises the steps of: decoding information on a quantization matrix; and restoring the quantization matrix on the basis of the information on the quantization matrix, wherein the information on the quantization matrix includes information indicating a DC value of the quantization matrix and/or information indicating differential values of quantization matrix coefficients.

公开(公告)号：US10440393B2

公开(公告)日：2019-10-08

申请号：US16059378

申请日：2018-08-09

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/82 ,  H04N19/176 ,  H04N19/44 ,  H04N19/593 ,  H04N19/117 ,  H04N19/157 ,  H04N19/136 ,  H04N19/105 ,  H04N19/182 ,  H04N19/147

Abstract: Provided is a method and apparatus for performing intra-prediction using an adaptive filter. The method for performing intra-prediction includes the steps of: determining whether or not to apply a first filter for a reference pixel value on the basis of information of a neighboring block of a current block; applying the first filter for the reference pixel value when it is determined to apply the first filter; performing intra-prediction on the current block on the basis of the reference pixel value; determining whether or not to apply a second filter for a prediction value according to each prediction mode of the current block, which is predicted by the intra-prediction performance on the basis of the information of the neighboring block; and applying the second filter for the prediction value according to each prediction mode of the current block when it is determined to apply the second filter.

公开(公告)号：US10440392B2

公开(公告)日：2019-10-08

申请号：US16058487

申请日：2018-08-08

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/157 ,  H04N19/82 ,  H04N19/105 ,  H04N19/593 ,  H04N19/117 ,  H04N19/176 ,  H04N19/136 ,  H04N19/44 ,  H04N19/182 ,  H04N19/147

Abstract: Provided is a method and apparatus for performing intra-prediction using an adaptive filter. The method for performing intra-prediction includes the steps of: determining whether or not to apply a first filter for a reference pixel value on the basis of information of a neighboring block of a current block; applying the first filter for the reference pixel value when it is determined to apply the first filter; performing intra-prediction on the current block on the basis of the reference pixel value; determining whether or not to apply a second filter for a prediction value according to each prediction mode of the current block, which is predicted by the intra-prediction performance on the basis of the information of the neighboring block; and applying the second filter for the prediction value according to each prediction mode of the current block when it is determined to apply the second filter.

公开(公告)号：US10341661B2

公开(公告)日：2019-07-02

申请号：US15630831

申请日：2017-06-22

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: G06K9/00 ,  H04N19/129 ,  H04N19/176 ,  H04N19/70 ,  H04N19/122 ,  H04N19/119 ,  H04N19/136 ,  H04N19/61 ,  H04N19/159 ,  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：US10306244B2

公开(公告)日：2019-05-28

申请号：US16157217

申请日：2018-10-11

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N7/12 ,  H04N19/187 ,  H04N19/157 ,  H04N19/107 ,  H04N19/503 ,  H04N19/30

Abstract: A method of decoding a bistream comprising a plurality of layers according to the present invention includes setting parameters for decoding the bitstream from a random access point when random access occurs, and decoding a decoding target picture, wherein the setting of the parameters includes setting an initialization flag indicating whether the decoding target picture, that is an intra random access point (IRAP) picture, is output by correctly decoding all reference layers of a target layer including the decoding target picture when the random access occurs; setting a flag variable (NoRaslOutputFlag) indicating whether the decoding target picture is used as a random access point; and resetting the initialization flag when the decoding target picture is an IRAP picture and the flag variable is 1.

公开(公告)号：US10306228B2

公开(公告)日：2019-05-28

申请号：US15792086

申请日：2017-10-24

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N7/12 ,  H04N19/126 ,  H04N19/159 ,  H04N19/61 ,  H04N19/70 ,  H04N19/463 ,  H04N19/196 ,  H04N19/50 ,  H04N19/176

Abstract: The present invention relates to a method for encoding and decoding a quantized matrix and an apparatus using the same. The method for encoding a quantized matrix according to the present invention includes the steps of: determining a quantization matrix to be used for quantization and quantizing; determining the prediction scheme used for the quantization of the quantization matrix; and encoding quantization matrix information on the basis of the determined prediction scheme. In this case, the prediction scheme may be either a prediction scheme between coefficients in the quantization matrix or a quantization matrix copying scheme.

公开(公告)号：US10230984B2

公开(公告)日：2019-03-12

申请号：US15878870

申请日：2018-01-24

Applicant: Electronics and Telecommunications Research Institute ,  INDUSTRY-ACADEMIC COOPERATION GROUP OF SEJONG UNIVERSITY

Inventor： Jung Won Kang ,  Ha Hyun Lee ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim ,  Jong Ki Han ,  Jae Yung Lee

IPC: H04N19/597 ,  H04N19/105 ,  H04N19/70 ,  H04N19/31 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/184 ,  H04N19/177

Abstract: The present invention is related to a method for moving the position of a base view from an arbitrary GOP (Group Of Pictures) start position to implement an efficient encoding structure in multi-view video encoding. The existing multi-view video encoding method exhibits low encoding efficiency when correlation between the base view and a dependent view is low, since the base view is assumed to be fixed. Moreover, in case the view in a live broadcasting program desired by a producer changes from the base view to another, the user has to consume more bit streams and decoder complexity than those consumed when decoding is performed with respect to the base view. Therefore, to alleviate the drawbacks of the existing multi-view video encoding method, the present invention provides a method for designing syntax elements by which the base view can be moved, thereby supporting an efficient encoding structure.

公开(公告)号：US10218999B2

公开(公告)日：2019-02-26

申请号：US14372816

申请日：2013-01-18

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：US10218972B2

公开(公告)日：2019-02-26

申请号：US15649330

申请日：2017-07-13

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

Inventor： Sung Chang Lim ,  Ha Hyun Lee ,  Se Yoon Jeong ,  Hui Yong Kim ,  Suk Hee Cho ,  Jong Ho Kim ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim ,  Chie Teuk Ahn ,  Dong Gyu Sim ,  Seoung Jun Oh ,  Gwang Hoon Park ,  Sea Nae Park ,  Chan Woong Jeon

IPC: H04N19/11 ,  H04N19/117 ,  H04N19/46 ,  H04N19/593 ,  H04N19/132 ,  H04N19/17 ,  H04N19/50 ,  H04N19/109 ,  H04N19/159 ,  H04N19/174 ,  H04N19/192 ,  H04N19/82 ,  H04N19/176

Abstract: The present invention relates to an apparatus and method for encoding and decoding an image by skip encoding. The image-encoding method by skip encoding, which performs intra-prediction, comprises: performing a filtering operation on the signal which is reconstructed prior to an encoding object signal in an encoding object image; using the filtered reconstructed signal to generate a prediction signal for the encoding object signal; setting the generated prediction signal as a reconstruction signal for the encoding object signal; and not encoding the residual signal which can be generated on the basis of the difference between the encoding object signal and the prediction signal, thereby performing skip encoding on the encoding object signal.