公开(公告)号：US20190342576A1

公开(公告)日：2019-11-07

申请号：US16513198

申请日：2019-07-16

Applicant: LG ELECTRONICS INC.

Inventor： Joonyoung PARK ,  Seungwook PARK ,  Jaehyun LIM ,  Jungsun KIM ,  Younghee CHOI ,  Jaewon SUNG ,  Byeongmoon JEON ,  Yongjoon JEON

IPC: H04N19/55 ,  H04N19/513 ,  H04N19/184 ,  H04N19/172 ,  H04N19/52 ,  H04N19/593 ,  H04N19/176 ,  H04N19/61 ,  H04N19/625

Abstract: The present invention relates to a method and apparatus for processing a video signal, which can increase the accuracy of the motion vector prediction through motion vector scaling which takes a difference in the temporal distance between reference pictures into consideration. To this end, the present invention provides a video signal processing method and a video signal processing apparatus using the same, and the method comprises the steps of: scaling at least one neighboring partition motion vector for a motion vector prediction of the current partition; scaling the neighboring partition motion vector, which has been selected, when the reference picture of the neighboring partition motion vector is different from the reference picture of the current partition; acquiring a motion vector prediction value of the current partition using the scaled motion vector; and acquiring a motion vector of the current partition using the motion vector prediction value.

公开(公告)号：US20190268621A1

公开(公告)日：2019-08-29

申请号：US16411283

申请日：2019-05-14

Applicant: LG Electronics Inc.

Inventor： Jungsun KIM ,  Seungwook PARK ,  Jaehyun LIM ,  Joonyoung PARK ,  Younghee CHOI ,  Jaewon SUNG ,  Byeongmoon JEON ,  Yongjoon JEON

IPC: H04N19/593 ,  H04N19/96 ,  H04N19/174 ,  H04N19/59 ,  H04N19/172 ,  H04N19/196 ,  H04N19/80 ,  H04N19/107 ,  H04N19/186 ,  H04N19/11 ,  H04N19/61 ,  H04N19/122 ,  H04N19/70 ,  H04N19/176 ,  H04N19/157

Abstract: A method for signalling an intra chroma prediction mode and a method for implementing the signalled intra chroma prediction mode, the intra chroma prediction mode taking an intropolation of previously predicted luma samples from neighboring blocks of video data to attain an intra chroma prediction of a current chroma prediction unit.

公开(公告)号：US20190268620A1

公开(公告)日：2019-08-29

申请号：US16406810

申请日：2019-05-08

Applicant: LG Electronics Inc.

Inventor： Hendry HENDRY ,  Seungwook PARK ,  Jaehyun LIM ,  Yongjoon JEON ,  Chulkeun KIM ,  Jungsun KIM ,  Naeri PARK ,  Byeongmoon JEON ,  Joonyoung PARK

IPC: H04N19/577 ,  H04N19/46 ,  H04N19/503 ,  H04N19/44 ,  H04N19/423 ,  H04N19/70 ,  H04N19/573

Abstract: The present invention relates to a method for signaling image information and to a decoding method using same. The method for signaling image information according to the present invention comprises: a step of performing inter-prediction for a current picture; and a step of signaling information including the result of said inter-prediction and reference picture information indicating reference pictures usable in said inter prediction, wherein said reference picture information contains pieces of picture order count (POC) information of said usable reference pictures. The POC information of said usable reference pictures in said reference picture information is configured such that POCs for the pictures existing before said current picture in terms of a POC sequence are located at the front, and POCs for the pictures existing after said current picture in terms of a POC sequence are located following the POCs located at the front.

公开(公告)号：US20190215531A1

公开(公告)日：2019-07-11

申请号：US16335116

申请日：2017-09-22

Applicant: LG ELECTRONICS INC.

Inventor： Jaeho LEE ,  Junghak NAM ,  Jaehyun LIM

IPC: H04N19/577 ,  H04N19/122 ,  H04N19/176 ,  H04N19/96 ,  H04N19/567

Abstract: The present invention relates to a method for performing bi-prediction using a template-based weight, comprising the steps of: determining a template region for performing bi-prediction of a current block; calculating an uncorrelation factor on the basis of the template region, wherein the uncorrelation factor denotes a value indicating the uncorrelation between a template of the current block and a template of a reference block; determining a first weight parameter of the current block on the basis of the uncorrelation factor; and obtaining a first prediction value of the current block using the weight parameter.

公开(公告)号：US20190110061A1

公开(公告)日：2019-04-11

申请号：US16087963

申请日：2016-03-24

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Jaehyun LIM ,  Junghak NAM

IPC: H04N19/513 ,  H04N19/44 ,  H04N19/103 ,  H04N19/176 ,  H04N19/119

Abstract: A video decoding method performed by a decoding apparatus comprises: deriving control points (CPs) for the current block; obtaining motion vectors for the CPs; deriving a motion vector of a sub-block or a sample unit in the current block on the basis of the obtained motion vectors; deriving a prediction sample for the current block on the basis of the derived motion vector; and generating a reconstruction sample on the basis of the prediction sample. The method enables effective performance of inter prediction through the motion vectors (transformation prediction), not only when an image in the current block is moved in a plane, but also when the image in the current block is rotated, zoomed in, zoomed out, or transformed into a parallelogram. Accordingly, the amount of data for the residual signal for the current block can be eliminated or reduced, and the overall coding efficiency can be improved.

公开(公告)号：US20190058881A1

公开(公告)日：2019-02-21

申请号：US15767267

申请日：2016-09-22

Applicant: LG ELECTRONICS INC.

Inventor： Jungdong SEO ,  Jaehyun LIM ,  Naeri PARK

IPC: H04N19/119 ,  H04N19/136 ,  H04N19/176 ,  H04N19/44

CPC classification number: H04N19/119 ,  H04N19/136 ,  H04N19/176 ,  H04N19/44 ,  H04N19/70

Abstract: Disclosed are a method for processing an image and an apparatus therefor. Specifically, a method for decoding an image comprises: a step of deriving an initial block size information indicating information in which a first block, which is a basic unit for dividing an image, is divided into one or more initial blocks; a step of deriving a division information indicating information in which the initial block is divided into a plurality of second blocks in the initial block unit divided from the first block based on the initial block size information; and a step of decoding in a second block unit recursively divided from the initial block based on the division information.

公开(公告)号：US20180359468A1

公开(公告)日：2018-12-13

申请号：US15765167

申请日：2016-09-20

Applicant: LG ELECTRONICS INC.

Inventor： Jungdong SEO ,  Jaehyun LIM ,  Naeri PARK

IPC: H04N19/105 ,  H04N19/593 ,  H04N19/59

CPC classification number: H04N19/109 ,  H04N19/132 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/34 ,  H04N19/44 ,  H04N19/96

Abstract: Disclosed are an image processing method on the basis of an inter prediction mode and an apparatus therefor. Specifically, a method for processing an image on the basis of inter prediction may comprise the steps of reducing the bit depth of a reconstructed picture and storing the same in a reference picture buffer; re-scaling the bit depth of a reference picture of a current block in the reconstructed picture stored in the reference picture buffer; and generating a prediction block for the current block on the basis of the reference picture, the bit depth of which has been re-scaled.

公开(公告)号：US20180309987A1

公开(公告)日：2018-10-25

申请号：US15768403

申请日：2016-01-25

Applicant: LG ELECTRONICS INC.

Inventor： Kyuwoon KIM ,  Jaehyun LIM ,  Naeri PARK ,  Jungdong SEO

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/105 ,  H04N19/513

CPC classification number: H04N19/117 ,  H04N19/105 ,  H04N19/176 ,  H04N19/503 ,  H04N19/513 ,  H04N19/82

Abstract: An inter prediction method according to the present invention, which is performed by a decoding apparatus, comprises the steps of: acquiring prediction-related information and residual information from a received bitstream; performing inter prediction on a current block on the basis of the prediction-related information so as to generate prediction samples; generating a list of Wiener filter candidates on the basis of spatially neighboring blocks of the current block, and deriving Wiener filter coefficients for the current block on the basis of candidate blocks in the list of the Wiener filter candidates; filtering the prediction samples on the basis of the derived Wiener filter coefficients; deriving residual samples for the current block on the basis of the residual information; and generating a reconstructed picture on the basis of the filtered prediction samples and the residual samples. The present invention can reduce the amount of data for a residual signal and improve coding efficiency.

公开(公告)号：US20180227594A1

公开(公告)日：2018-08-09

申请号：US15945390

申请日：2018-04-04

Applicant: LG ELECTRONICS INC.

Inventor： Joonyoung PARK ,  Seungwook PARK ,  Jaehyun LIM ,  Jungsun KIM ,  Younghee CHOI ,  Jaewon SUNG ,  Byeongmoon JEON ,  Yongjoon JEON

IPC: H04N19/52 ,  H04N19/50 ,  H04N19/176 ,  H04N19/513 ,  H04N19/109 ,  H04N19/577 ,  H04N19/11 ,  H04N19/51

CPC classification number: H04N19/52 ,  H04N19/109 ,  H04N19/11 ,  H04N19/176 ,  H04N19/426 ,  H04N19/463 ,  H04N19/50 ,  H04N19/51 ,  H04N19/521 ,  H04N19/577

Abstract: A motion information storing method and a TMVP deriving method using the motion information storing method are provided. The motion information storing method includes a step of determining a representative block out of blocks of a motion data storage unit in a co-located picture with a current picture and a step of storing motion information of the representative block as motion information of the motion data storage unit, wherein the motion information of the representative block is used as motion information of the blocks included in the motion data storage unit.

公开(公告)号：US20180227582A1

公开(公告)日：2018-08-09

申请号：US15942897

申请日：2018-04-02

Applicant: LG ELECTRONICS INC.

Inventor： Seungwook PARK ,  Joonyoung PARK ,  Jungsun KIM ,  Younghee CHOI ,  Yongjoon JEON ,  Jaewon SUNG ,  Byeongmoon JEON ,  Jaehyun LIM

IPC: H04N19/139 ,  H04N19/51 ,  H04N19/56 ,  H04N19/513 ,  H04N19/167 ,  H04N19/61 ,  H04N19/105 ,  H04N19/96 ,  H04N19/159

CPC classification number: H04N19/139 ,  H04N19/105 ,  H04N19/159 ,  H04N19/167 ,  H04N19/51 ,  H04N19/521 ,  H04N19/56 ,  H04N19/61 ,  H04N19/96

Abstract: The present invention discloses a method and apparatus for encoding or decoding a video signal. The method for processing a video signal according to the present invention uses a merging mode in which prediction information on a neighbor unit is used instead of transmitting prediction information on the present unit, so as to improve coding efficiency. In this case, the number of available candidate units for merging among the units in a predetermined position is determined, and information for the merging mode is acquired on the basis of the number of the available candidate units for merging. The unit to be merged is determined using the information for the merging mode, and prediction information on the unit to be merged is acquired. The prediction value for the present unit is acquired using the prediction information on the unit to be merged, and the present unit is restored using the acquired prediction value.