公开(公告)号：US20250016375A1

公开(公告)日：2025-01-09

申请号：US18896804

申请日：2024-09-25

Applicant: LG ELECTRONICS INC.

Inventor： Jung Sun KIM ,  Seung Wook PARK ,  Young Hee CHOI ,  Jaewon SUNG ,  Byeong Moon JEON ,  Joon Young PARK

IPC: H04N19/61 ,  H04N19/119 ,  H04N19/122 ,  H04N19/129 ,  H04N19/149 ,  H04N19/176 ,  H04N19/18 ,  H04N19/625

Abstract: The present invention relates to a method for decoding a video signal, comprising the steps of: acquiring a transform size flag of the current macroblock from a video signal; checking the number of non-zero transform coefficients at each pixel position in a first transform block which corresponds to the transform size flag; changing a scan order of the first transform block by prioritizing the position of the pixel having the greatest number of the nonzero transform coefficients in the first transform block; determining the number of the non-zero transform coefficients at each pixel position in a second transform block, and setting the changed scan order of the first transform block as an initialized scan order of the second transform block; adding the number of the non-zero transform coefficients at each pixel position in the first transform block and the number of the non-zero transform coefficients at each pixel position in the second transform block, and changing the scan order of the second transform block by prioritizing the position of the pixel having the greatest number of the nonzero transform coefficients; and decoding the transform coefficients arranged in the scan order changed in the previous step, wherein the first transform block and the second transform block have sizes corresponding to the transform size flag, and are contained in the current macroblock.

公开(公告)号：US20230362404A1

公开(公告)日：2023-11-09

申请号：US18222188

申请日：2023-07-14

Applicant: LG Electronics Inc.

Inventor： Seung Wook PARK ,  Jae Hyun LIM ,  Jung Sun KIM ,  Joon Young PARK ,  Young Hee CHOI ,  Byeong Moon JEON ,  Yong Joon JEON

IPC: H04N19/52 ,  H04N19/513

CPC classification number: H04N19/521 ,  H04N19/52

Abstract: A method for setting the motion vector list and the apparatus using the same may include determining the presence of a first motion vector or a second motion vector by a sequential determination process in a first spatial candidate prediction group; and setting the first motion vector or the second motion vector produced through the sequential determination process as the candidate prediction motion vector. Thus, the encoding/decoding time and the complexity can be reduced by restricting the scaling number in a process for scanning the candidate prediction motion vector.

公开(公告)号：US20220272379A1

公开(公告)日：2022-08-25

申请号：US17736632

申请日：2022-05-04

Applicant: LG ELECTRONICS INC.

Inventor： Yong Joon JEON ,  Seung Wook PARK ,  Jae Hyun Lim ,  Jung Sun KIM ,  Joon Young PARK ,  Young Hee CHOI ,  Jae Won SUNG ,  Byeong Moon JEON

IPC: H04N19/593 ,  H04N19/70 ,  H04N19/11 ,  H04N19/132 ,  H04N19/186 ,  H04N19/16 ,  G06T9/00 ,  H04N19/136 ,  H04N19/176 ,  H04N19/423 ,  H04N19/44

Abstract: Disclosed are an intra prediction method of a chrominance block using a luminance sample and an apparatus using the same. An image decoding method comprises the steps of calculating an intra prediction mode of a chrominance block on the basis of an LM mapping table when the chrominance block uses an LM; and generating a prediction block for the chrominance block on the basis of the calculated intra prediction mode of the chrominance block. When intra prediction mode information of chrominance blocks are decoded, mutually different tables are used depending on whether or not an LM is used, so that encoding and decoding can be performed without an unnecessary waste of bits.

公开(公告)号：US20220060736A1

公开(公告)日：2022-02-24

申请号：US17516382

申请日：2021-11-01

Applicant: LG Electronics Inc.

Inventor： Seung Wook PARK ,  Jung Sun KIM ,  Young Hee CHOI ,  Byeong Moon JEON ,  Joon Young PARK

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/70 ,  H04N19/46 ,  H04N19/61 ,  H04N19/132 ,  H04N19/44 ,  H04N19/573

Abstract: A method of processing a video signal is disclosed. The present invention includes obtaining a current macroblock type, obtaining skip or direct mode indication information on a partition of the current macroblock according to the current macroblock type, deriving a motion vector of the partition according to the skip or direct mode indication information, and predicting a pixel value of the partition using the motion vector. Accordingly, the present invention obtains a pixel value of a reference block close to an original video using a motion vector, thereby enhancing a reconstruction ratio of the macroblock. As a macroblock uses skip or direct prediction indication information, it is unnecessary to separately code skip mode indication information and direct mode indication information on the macroblock, whereby an information size to be coded can be reduced.

公开(公告)号：US20210368201A1

公开(公告)日：2021-11-25

申请号：US17395953

申请日：2021-08-06

Applicant: LG Electronics Inc.

Inventor： Seung Wook PARK ,  Jae Hyun LIM ,  Jung Sun KIM ,  Joon Young PARK ,  Young Hee CHOI ,  Byeong Moon JEON ,  Yong Joon JEON

IPC: H04N19/513 ,  H04N19/52

Abstract: A method for setting the motion vector list and the apparatus using the same may include determining the presence of a first motion vector or a second motion vector by a sequential determination process in a first spatial candidate prediction group; and setting the first motion vector or the second motion vector produced through the sequential determination process as the candidate prediction motion vector. Thus, the encoding/decoding time and the complexity can be reduced by restricting the scaling number in a process for scanning the candidate prediction motion vector.

公开(公告)号：US20210218992A1

公开(公告)日：2021-07-15

申请号：US17214059

申请日：2021-03-26

Applicant: LG Electronics Inc.

Inventor： Yong Joon JEON ,  Seung Wook PARK ,  Jae Hyun LIM ,  Jung Sun KIM ,  Joon Young PARK ,  Young Hee CHOI ,  Jae Won SUNG ,  Byeong Moon JEON

IPC: H04N19/593 ,  G06T9/00 ,  H04N19/11 ,  H04N19/132 ,  H04N19/136 ,  H04N19/70 ,  H04N19/176 ,  H04N19/186 ,  H04N19/423 ,  H04N19/44 ,  H04N19/16

Abstract: Disclosed are an intra prediction method of a chrominance block using a luminance sample and an apparatus using the same. An image decoding method comprises the steps of: calculating an intra prediction mode of a chrominance block on the basis of an LM mapping table when the chrominance block uses an LM; and generating a prediction block for the chrominance block on the basis of the calculated intra prediction mode of the chrominance block. When intra prediction mode information of chrominance blocks are decoded, mutually different tables are used depending on whether or not an LM is used, so that encoding and decoding can be performed without an unnecessary waste of bits.

公开(公告)号：US20210076067A1

公开(公告)日：2021-03-11

申请号：US17100162

申请日：2020-11-20

Applicant: LG Electronics Inc.

Inventor： Jae Won SUNG ,  Seung Wook PARK ,  Yong Joon JEON ,  Jung Sun KIM ,  Young Hee CHOI ,  Byeong Moon JEON ,  Joon Young PARK

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/176 ,  H04N19/61 ,  H04N19/14 ,  H04N19/157 ,  H04N19/182 ,  H04N19/44 ,  H04N19/86 ,  H04N19/46

Abstract: A method and apparatus for decoding a video signal are disclosed. A method for decoding a video signal includes obtaining block type information of a current block, confirming a prediction mode of the current block based on the block type information, obtaining, if the prediction mode of the current block is an intra prediction mode according to the prediction mode, at least one correlation parameter information using at least one neighboring pixel of the current block, obtaining an intra prediction value of the current block using the correlation parameter information, and reconstructing the current block using the intra prediction value of the current block.

公开(公告)号：US20200288137A1

公开(公告)日：2020-09-10

申请号：US16882045

申请日：2020-05-22

Applicant: LG Electronics Inc.

Inventor： Jae Hyun LIM ,  Seung Wook PARK ,  Jung Sun KIM ,  Yong Joon JEON ,  Joon Young PARK ,  Byeong Moon JEON

IPC: H04N19/132 ,  H04N19/13 ,  H04N19/91 ,  H04N19/46 ,  H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/513 ,  H04N19/61 ,  H04N19/64 ,  H04N19/82

Abstract: The present invention relates to a method of for signaling information on a prediction mode and to a method of for decoding image information using same. A According to the present invention, the method of for signaling prediction mode information, serving according to the present invention, as a method of for signaling image information, includes performingperforming prediction on a current block and signaling the prediction-type information applied to the current block. The signaling of the information includes joint-coding and components of signaling information components constituting the prediction-type information. According to the present invention, overhead may be reduced when information on a prediction is signaled.

公开(公告)号：US20190238875A1

公开(公告)日：2019-08-01

申请号：US16380345

申请日：2019-04-10

Applicant: LG ELECTRONICS INC.

Inventor： Joon Young PARK ,  Seung Wook PARK ,  Jung Sun KIM ,  Young Hee CHOI ,  Byeong Moon JEON

IPC: H04N19/44 ,  H04N19/11 ,  H04N19/196 ,  H04N19/70 ,  H04N19/176 ,  H04N19/587 ,  H04N19/184 ,  H04N19/61

CPC classification number: H04N19/44 ,  H04N19/11 ,  H04N19/176 ,  H04N19/184 ,  H04N19/196 ,  H04N19/587 ,  H04N19/61 ,  H04N19/70

Abstract: The present invention includes obtaining block type identification information on a partition of the current macroblock when the current macroblock is intra-mixed, specifying a block type of the current macroblock based on the block type identification information, obtaining an intra prediction mode of the current macroblock according to the block type of the partition of the current macroblock, and predicting the current macroblock using the intra prediction mode and a pixel value of a neighboring block.

公开(公告)号：US20190110074A1

公开(公告)日：2019-04-11

申请号：US16210700

申请日：2018-12-05

Applicant: LG Electronics Inc.

Inventor： Jae Won SUNG ,  Seung Wook PARK ,  Yong Joon JEON ,  Jung Sun KIM ,  Young Hee CHOI ,  Byeong Moon JEON ,  Joon Young PARK

IPC: H04N19/593 ,  H04N19/46 ,  H04N19/86 ,  H04N19/44 ,  H04N19/182 ,  H04N19/105 ,  H04N19/14 ,  H04N19/61 ,  H04N19/176 ,  H04N19/157

Abstract: A method and apparatus for decoding a video signal are disclosed. A method for decoding a video signal includes obtaining block type information of a current block, confirming a prediction mode of the current block based on the block type information, obtaining, if the prediction mode of the current block is an intra prediction mode according to the prediction mode, at least one correlation parameter information using at least one neighboring pixel of the current block, obtaining an intra prediction value of the current block using the correlation parameter information, and reconstructing the current block using the intra prediction value of the current block.