公开(公告)号：US11516464B2

公开(公告)日：2022-11-29

申请号：US17180274

申请日：2021-02-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Haitao Yang ,  Lian Zhang

IPC: H04N19/00 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/30

Abstract: This disclosure discloses a method for obtaining a candidate motion vector list, an apparatus, an encoder, and a decoder. The method for obtaining a candidate motion vector list comprises: when a first candidate picture block is encoded/decoded and an inter prediction mode is used, determining whether a reference picture of the first candidate picture block is the same as a reference picture of a current block; and constructing a candidate motion vector list of the current block based on a determining result; when the reference picture of the first candidate picture block is different from the reference picture of the current block, the MV of the first candidate picture block is not used to construct the list. Implementing this disclosure can reduce complexity of a motion information derivation process, and improve coding efficiency.

公开(公告)号：US11290724B2

公开(公告)日：2022-03-29

申请号：US16894268

申请日：2020-06-05

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shan Gao ,  Weiwei Xu ,  Huanbang Chen ,  Haitao Yang

IPC: H04N19/139 ,  H04N19/176 ,  H04N19/56 ,  H04N19/573

Abstract: An inter prediction method includes parsing, by a processor, a bitstream to obtain a location of a target adjacent image block of a current image block. The method further includes obtaining a preset correspondence between an adjacent image block location and a motion vector precision, wherein in the preset correspondence, locations of at least two adjacent image blocks correspond to different motion vector precisions. The method further includes determining, based on the location of the target adjacent image block and the preset correspondence, a target motion vector precision corresponding to the target adjacent image block. The method further includes determining a motion vector predictor of the current image block based on the location of the target adjacent image block and the target motion vector precision.

公开(公告)号：US20220078442A1

公开(公告)日：2022-03-10

申请号：US17478697

申请日：2021-09-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/139 ,  H04N19/176 ,  H04N19/174 ,  H04N19/172 ,  H04N19/119 ,  H04N19/52

Abstract: The present disclosure relates to an apparatus, an encoder, a decoder and corresponding methods for prediction refinement with optical flow (PROF) for an affine coded block, in which when a plurality of optical flow decision conditions are fulfilled for the affine coded block, performing a PROF process for a current sub-block of the affine coded block to obtain refined prediction sample values of the current sub-block of the affine coded block. After the sub-block based affine motion compensation is performed, a prediction sample value of the current sample of the current sub-block is refined by adding a delta prediction value. Thus, it allows for a better trade-off between coding complexity and prediction accuracy.

公开(公告)号：US20220078441A1

公开(公告)日：2022-03-10

申请号：US17529106

申请日：2021-11-17

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Huanbang Chen ,  Haitao Yang ,  Lian Zhang

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: This application discloses an inter prediction method, where a to-be-processed block includes one or more subblocks, and the method includes: determining a temporal offset vector of the to-be-processed block based on a spatially neighboring block of the to-be-processed block, where the temporal offset vector is used to determine a collocated subblock of the subblock of the to-be-processed block; and determining a motion vector of the subblock of the to-be-processed block based on a motion vector of the collocated subblock, where the motion vector of the subblock of the to-be-processed block is obtained based on a first preset motion vector when the motion vector of the collocated subblock is unavailable. This application can improve prediction accuracy in coding and increase coding efficiency.

公开(公告)号：US11265572B2

公开(公告)日：2022-03-01

申请号：US16047325

申请日：2018-07-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Sixin Lin ,  Haitao Yang ,  Shan Gao

IPC: H04N19/52 ,  H04N19/119 ,  H04N19/43 ,  H04N19/61 ,  H04N19/86 ,  H04N19/139 ,  H04N19/176 ,  H04N19/117 ,  H04N19/583

Abstract: The present invention relates to the field of video image processing, and provides a filtering method and an apparatus, to resolve a problem that subjective quality and objective quality of an image deteriorate because filtering processing cannot be performed on internal blocks of a non-translational motion prediction unit.

公开(公告)号：US20210195198A1

公开(公告)日：2021-06-24

申请号：US17195798

申请日：2021-03-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Haitao Yang

IPC: H04N19/13 ,  H04N19/70 ,  H04N19/176 ,  H04N19/159 ,  H04N19/52

Abstract: A video decoding method includes obtaining a to-be-entropy-decoded syntax element in a current block by parsing a received bitstream, where the to-be-entropy-decoded syntax element includes a syntax element 1 or a syntax element 2 in the current block, obtaining a context model corresponding to the to-be-entropy-decoded syntax element, where both of a context model corresponding to the syntax element 1 and a context model corresponding to the syntax element 2 are determined from the same preset context model set, entropy decoding the to-be-entropy-decoded syntax element based on the context model corresponding to the to-be-entropy-decoded syntax element, and obtaining a reconstructed image of the current block based on the syntax element obtained by entropy decoding.

公开(公告)号：US11039127B2

公开(公告)日：2021-06-15

申请号：US16786660

申请日：2020-02-10

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Hong Zhang ,  Haitao Yang

IPC: H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/517

Abstract: The present disclosure provides a video image decoding method in which a size of an affine motion compensation image sub-block in an affine image block is determined based on a motion vector difference, motion vector precision, a distance between control points in the affine image block, and a size of the affine image block, where the size includes a length in a horizontal direction and a length in a vertical direction, so that a length of the affine image block in a horizontal/vertical direction is an integer multiple of the length of the affine motion compensation image sub-block in the horizontal/vertical direction.

公开(公告)号：US20210092433A1

公开(公告)日：2021-03-25

申请号：US17111376

申请日：2020-12-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Yin Zhao ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/189

Abstract: This application provides a motion vector obtaining method and apparatus. The method includes: determining a target offset vector of a block and identifier information of a target picture, wherein the block comprises at least one sub-block; determining a location of the sub-block; determining, as a target location coordinate value of a collocated sub-block, a location coordinate value obtained by performing a clipping operation on an initial location coordinate value in a range, wherein the initial location coordinate value is based on the location of the sub-block and the target offset vector; and obtaining a motion vector of the sub-block based on a motion vector corresponding to the target location coordinate value. Thus, a range of the target offset vector is limited, so that a quantity of memory read times can be reduced in a process of obtaining the motion vector of the collocated sub-block.

公开(公告)号：US20180376161A1

公开(公告)日：2018-12-27

申请号：US16054306

申请日：2018-08-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Sixin Lin ,  Haitao Yang

IPC: H04N19/52 ,  H04N19/157 ,  H04N19/139 ,  H04N19/124

Abstract: An image encoding method includes: determining N encoded units from adjacent encoded units of a to-be-encoded unit according to a first preset rule, where a motion prediction mode of the N encoded units is the same as that of the to-be-encoded unit; generating an nth motion vector group by using a first preset algorithm and based on a motion vector of an nth encoded unit; determining, from obtained N motion vector groups according to a second preset rule, one motion vector group as an optimal motion vector group; determining a prediction sample value of each sample unit in the to-be-encoded unit by using a second preset algorithm and based on the optimal motion vector group; and encoding a prediction residual of each sample unit and an index identifier of the optimal motion vector group, to obtain a bitstream corresponding to the to-be-encoded unit.

公开(公告)号：US20180359484A1

公开(公告)日：2018-12-13

申请号：US16047325

申请日：2018-07-27

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Huanbang Chen ,  Sixin Lin ,  Haitao Yang ,  Shan Gao

IPC: H04N19/52 ,  H04N19/119 ,  H04N19/43 ,  H04N19/61 ,  H04N19/86

CPC classification number: H04N19/52 ,  H04N19/119 ,  H04N19/43 ,  H04N19/61 ,  H04N19/86

Abstract: The present invention relates to the field of video image processing, and provides a filtering method and an apparatus, to resolve a problem that subjective quality and objective quality of an image deteriorate because filtering processing cannot be performed on internal blocks of a non-translational motion prediction unit.