公开(公告)号：US20230137884A1

公开(公告)日：2023-05-04

申请号：US17917524

申请日：2021-04-07

申请人： LG ELECTRONICS INC.

发明人： Moonmo Koo ,  Jaehyun Lim ,  Seunghwan Kim ,  Mehdi Salehifar

IPC分类号： H04N19/132 ,  H04N19/18 ,  H04N19/186 ,  H04N19/176

摘要： An image decoding method according to the present document comprises the steps of: deriving a transform coefficient for a current block on the basis of residual information; when LFNST is applied to the current block, receiving an LFNST index related to an LFNST matrix; and deriving a modified transform coefficient for the current block on the basis of the LFNST matrix, wherein the LFNST index may be signaled for a luma component of the current block.

公开(公告)号：US20230137603A1

公开(公告)日：2023-05-04

申请号：US18090871

申请日：2022-12-29

申请人： LG ELECTRONICS INC.

发明人： Jie ZHAO ,  Seung Hwan Kim ,  Mehdi Salehifar

IPC分类号： H04N19/186 ,  H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/463

摘要： Provided are an image encoding/decoding method and device. The image decoding method performed by the image decoding device, according to the present disclosure, may comprise the steps of: determining a residual sample of a current block; and resetting the value of the residual sample on the basis of whether a color space transform is applied. The step for resetting the value of the residual block may be performed on the basis of a half value of a chroma residual sample value.

公开(公告)号：US11641465B2

公开(公告)日：2023-05-02

申请号：US17620972

申请日：2020-07-22

申请人： HFI INNOVATION INC.

发明人： Chen-Yen Lai ,  Ching-Yeh Chen ,  Tzu-Der Chuang

IPC分类号： H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/82

摘要： Methods and apparatus for loop-filter processing of reconstructed video are disclosed. According to this method, if a loop-filter is disallowed for a target boundary, the target loop filter is disabled at top, bottom, left and right of the target boundary. According to another method, CC-ALF (cross-component adaptive loop filter) shape is changed across a virtual boundary. According to yet another method, CC-ALF and luma ALF handle unavailable samples in a same way.

公开(公告)号：US20230128496A1

公开(公告)日：2023-04-27

申请号：US18145569

申请日：2022-12-22

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Maxim Borisovitch Sychev ,  Elena Alexandrovna Alshina ,  Mikhail Vyacheslavovich Sosulnikov ,  Alexander Alexandrovich Karabutov

IPC分类号： H04N19/137 ,  H04N19/132 ,  H04N19/105 ,  H04N19/172

摘要： Methods and apparatuses are provided for estimating motion vectors of a dense motion field based on subsampled sparse motion field. The sparse motion field includes two or more motion vectors with their respective start positions. For each of the motion vectors, a transformation is derived which transforms the motion vector from its start point into a target point. The transformed motion vectors then contribute to the estimated motion vector on the target position. The contribution of each motion vector is weighted. Such motion estimation may be readily used for video encoding and decoding.

公开(公告)号：US20230125381A1

公开(公告)日：2023-04-27

申请号：US18146372

申请日：2022-12-24

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Timofey Mikhailovich SOLOVYEV ,  Semih Esenlik ,  Jianle Chen ,  Anand Meher Kotra ,  Han Gao ,  Biao Wang ,  Roman Igorevich Chernyak ,  Alexander Alexandrovich Karabutov ,  Sergey Yurievich Ikonin

IPC分类号： H04N19/503 ,  H04N19/105 ,  H04N19/13 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

摘要： A prediction method for an image block comprising a first prediction sub-block and a second prediction sub-block, the prediction method comprising: parsing a first index from a bitstream, wherein the first index is used to obtain prediction information of the first prediction sub-block; parsing a second index from the bitstream; comparing the first index with the second index; adjusting the second index in the event that the second index is equal to or greater than the first index; and obtaining prediction information of the second prediction sub-block according to the adjusted second index.

公开(公告)号：US11632568B2

公开(公告)日：2023-04-18

申请号：US17555190

申请日：2021-12-17

申请人： LG ELECTRONICS INC.

发明人： Hyeongmoon Jang ,  Naeri Park ,  Seunghwan Kim

IPC分类号： H04N19/52 ,  H04N19/70 ,  H04N19/105 ,  H04N19/109 ,  H04N19/119 ,  H04N19/132 ,  H04N19/139 ,  H04N19/176

摘要： The present disclosure relates to an image decoding and encoding method which can efficiently perform inter-prediction by applying a regular merge mode to the current block on the basis of the case in which an MMVD mode, a merge sub-block mode, a CIIP mode, and a partitioning mode, in which prediction is performed by dividing the current block into two partitions, are not available for the current block.

公开(公告)号：US11632566B2

公开(公告)日：2023-04-18

申请号：US17317452

申请日：2021-05-11

申请人： Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

发明人： Hongbin Liu ,  Li Zhang ,  Kai Zhang ,  Jizheng Xu ,  Yue Wang

IPC分类号： H04N19/517 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/137 ,  H04N19/139 ,  H04N19/196 ,  H04N19/513 ,  H04N19/573 ,  H04N19/577

摘要： A method for processing a video includes performing a conversion between a current block of visual media data and a corresponding coded representation of the visual media data, wherein the conversion of the current block includes determining whether a use of one or both of a bi-directional optical flow (BIO) technique or a decoder-side motion vector refinement (DMVR) technique to the current block is enabled or disabled, and wherein the determining the use of the BIO technique or the DMVR technique is based on a cost criterion associated with the current block.

公开(公告)号：US11632551B2

公开(公告)日：2023-04-18

申请号：US17587910

申请日：2022-01-28

申请人： LG Electronics Inc.

发明人： Moonmo Koo ,  Seunghwan Kim ,  Jaehyun Lim

IPC分类号： H04N19/132 ,  H04N19/30 ,  H04N19/176 ,  H04N19/159 ,  H04N19/18 ,  H04N19/46

摘要： An image decoding method according to the present document comprises the steps of: receiving a quantized transform coefficient for a target block and a transform index for a non-separable secondary transform; dequantizing the quantized transform coefficients to derive transform coefficients; deriving modified transform coefficients on the basis of a matrix operation of a transform kernel matrix in a transform set indicated by the transform index and a transform coefficient list corresponding to the magnitude of dequantized transform coefficients; clipping the modified transform coefficients to a predetermined range of values; and deriving residual samples for the target block on the basis of an inverse primary transform with respect to the modified transform coefficients clipped.

公开(公告)号：US20230113552A1

公开(公告)日：2023-04-13

申请号：US17488094

申请日：2021-09-28

申请人： Avago Technologies International Sales Pte. Limited

发明人： Minhua ZHOU

IPC分类号： H04N19/44 ,  H04N19/513 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

摘要： A video decoder is provided that includes memory and a processor coupled to the memory. The processor may be configured to convert a bitstream into inter-prediction parameters and reconstruct motion data based on the inter-prediction parameters. The processor may further be configured to refine the motion data based on finding a match between a current template of a current picture and a reference template of a reference picture and perform a motion compensation operation with the refined motion data and a reference block to generate an inter-prediction block. The processor may be configured to add the inter-prediction block to an inter-residual block to produce a reconstructed block. The motion data may be reconstructed without refined motion data associated with a previous prediction unit.

公开(公告)号：US11627341B2

公开(公告)日：2023-04-11

申请号：US17736944

申请日：2022-05-04

申请人： LG ELECTRONICS INC.

发明人： Seethal Paluri ,  Hendry Hendry ,  Seunghwan Kim ,  Jie Zhao

IPC分类号： H04N19/70 ,  H04N19/132 ,  H04N19/174 ,  H04N19/503 ,  H04N19/593

摘要： A video decoding method performed by a video decoding device according to the present document may comprise the steps of: acquiring image information from a bitstream, wherein the image information includes a picture header associated with a current picture, and the current picture includes multiple slices; based on the picture header, acquiring at least one of a first flag indicating whether information required for an inter-prediction operation exists in the picture header and a second flag indicating whether information required for an intra-prediction operation exists in the picture header; based on at least one of the first flag and the second flag, generating prediction samples.