公开(公告)号：US11310524B2

公开(公告)日：2022-04-19

申请号：US16858222

申请日：2020-04-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Haitao Yang ,  Shan Gao ,  Jiantong Zhou ,  Shan Liu

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/52 ,  H04N19/61 ,  H04N19/82

Abstract: A method includes obtaining a first motion vector of a motion compensation unit included in an affine code block. The method also includes determining a second motion vector based on the first motion vector, where a precision of the second motion vector matches a motion vector precision of a storage unit corresponding to the motion compensation unit. The method further includes determining a third motion vector based on the second motion vector, where there is a preset correspondence between the third motion vector and the second motion vector, and the third motion vector is used for subsequent encoding/decoding processing.

公开(公告)号：US20210211715A1

公开(公告)日：2021-07-08

申请号：US17209962

申请日：2021-03-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/513 ,  H04N19/52

Abstract: Embodiments of this application disclose a picture prediction method and apparatus, and a corresponding encoder and decoder. A prediction direction of a current picture block is considered when a size of a subblock in the current picture block is determined. For example, if a prediction mode of the current picture block is unidirectional prediction, the size of the subblock is 4×4; or if a prediction mode of the current picture block is bidirectional prediction, the size of the subblock is 8×8.

公开(公告)号：US20210185310A1

公开(公告)日：2021-06-17

申请号：US17189577

申请日：2021-03-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Haitao Yang

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/172

Abstract: Embodiments of this application relate to the field of video picture coding technologies, and disclose a reference frame obtaining method and apparatus applied to bidirectional inter prediction, to improve coding efficiency. The method includes: determining a first reference frame list and a second reference frame list of a current picture block; determining, from the first reference frame list, whether an X-directional reference frame x1 satisfying a condition A1 exists; determining, from the second reference frame list, whether a Y-directional reference frame y1 satisfying a condition B1 exists; and in response to determining that the X-directional reference frame x1 exists and determining that the Y-directional reference frame y1 exists, obtaining index values (R1, R2) of bidirectional reference frames of the current picture block.

公开(公告)号：US20210168355A1

公开(公告)日：2021-06-03

申请号：US17139837

申请日：2020-12-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen ,  Weiwei Xu ,  Ting Fu ,  Jiali Fu

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/132 ,  H04N19/119 ,  H04N19/70 ,  H04N19/176

Abstract: Technologies for inter prediction for a block in a video are provided. In one example, a method includes: parsing a bitstream to obtain a syntax element, where the syntax element includes at least an index of optimal candidate motion information of a current block; determining, based on the syntax element, to construct a first list or a second list for the current block, where the first list is a block-based candidate motion information list, and the second list is a subblock-based candidate motion information list; determining optimal motion information from the first list or the second list based on the index; and predicting the current block based on the optimal motion information. In this method, the block-based candidate motion information list and the subblock-based candidate motion information list are distinguished from each other. This effectively reduces transmission costs of the optimal candidate motion information.

公开(公告)号：US20210136404A1

公开(公告)日：2021-05-06

申请号：US17146349

申请日：2021-01-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/50

Abstract: A video encoder, a video decoder, and a corresponding method are provided. The method includes: parsing a bitstream to obtain an index, where the index indicates a target candidate motion vector group of a current coding block; determining the target candidate motion vector group in an affine candidate motion vector list based on the index, where the affine candidate motion vector list includes at least a first candidate motion vector group, the first candidate motion vector group is obtained based on a first group of control points of a first neighboring affine coding block, and the first group of control points is determined based on a CTU located relative to the current coding block, wherein the first neighboring affine coding block is located in the CTU; and predicting a predicted sample value of the current coding block based on the target candidate motion vector group.

公开(公告)号：US20200351500A1

公开(公告)日：2020-11-05

申请号：US16929979

申请日：2020-07-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jiali Fu ,  Yin Zhao ,  Shan Gao ,  Huanbang Chen ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/122 ,  H04N19/119 ,  H04N19/61 ,  H04N19/159

Abstract: A video coding mechanism is disclosed. The mechanism includes selecting a split mechanism to split a coding unit (CU) into sub-CUs for application of one or more transform units (TUs), the selection of the split mechanism based on comparing a CU width to a max TU width and comparing a CU height to a max TU height. The selected split mechanism is applied to the CU to obtain sub-CUs. A residual of one of the sub-CUs is determined. The residual includes a difference between sample values for the sub-CU and prediction samples for the sub-CU. The TUs are applied to transform the residual of the CU based on results of the selected split mechanism. A transformed residual for the CU is encoded into a bitstream.

公开(公告)号：US10798405B2

公开(公告)日：2020-10-06

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 ,  H04N19/513 ,  H04N19/176 ,  H04N19/105

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：US20200260108A1

公开(公告)日：2020-08-13

申请号：US16838954

申请日：2020-04-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/52 ,  H04N19/625 ,  H04N19/80 ,  H04N19/176

Abstract: Disclosed is a mechanism for selecting an interpolation filter for use in conjunction with an affine block in video coding. A motion vector is determined for a sub-block of the affine block based on control points. A sub-block size of the sub-block is also determined. The interpolation filter is selected for application to a reference block corresponding to the sub-block. The interpolation filter is selected based on the sub-block size. The motion vector of the sub-block and an offset of a current sample of the sub-block are employed to determine a reference sample at the reference block. This includes applying the interpolation filter to the reference block to determine the reference sample when the motion vector at the offset points to a fractional position at the reference block. The reference samples are employed to determine residual information in order to encode the affine block.

公开(公告)号：US20200177877A1

公开(公告)日：2020-06-04

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 ,  H04N19/517 ,  H04N19/176

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：US10404993B2

公开(公告)日：2019-09-03

申请号：US15699515

申请日：2017-09-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Sixin Lin ,  Fan Liang ,  Haitao Yang

IPC: H04N19/51 ,  H04N19/513 ,  H04N19/119 ,  H04N19/537

Abstract: A picture prediction method includes: determining two pixel samples in a current picture block, and determining a candidate motion information unit set corresponding to each of the two pixel samples; determining a merged motion information unit set i including two motion information units; and predicting a pixel value of the current picture block by using an affine motion model and the merged motion information unit set i.