公开(公告)号：US20230421755A1

公开(公告)日：2023-12-28

申请号：US18462625

申请日：2023-09-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang CHEN ,  Jianle CHEN ,  Haitao YANG

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/137

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/137

Abstract: Embodiments of this application disclose a bi-directional inter prediction method and apparatus. The method includes: determining a reference picture index i1 of a first reference picture list as a first reference picture index; determining a reference picture index i2 of a second reference picture list as a second reference picture index; and predicting the current block based on the first reference picture index and the second reference picture index. A POC corresponding to i1 is a POC, closest to a POC of a current picture, in all POCs that are in the first reference picture list and that are less than the POC of the current picture, a POC corresponding to i2 is a POC, closest to the POC of the current picture, in all POCs that are in the second reference picture list and that are greater than the POC of the current picture. Coding efficiency can be improved.

公开(公告)号：US20220329845A1

公开(公告)日：2022-10-13

申请号：US17843030

申请日：2022-06-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang CHEN ,  Sixin LIN ,  Haitao YANG

IPC: H04N19/52 ,  H04N19/139 ,  H04N19/513 ,  H04N19/176 ,  H04N19/105 ,  H04N19/124 ,  H04N19/157

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：US20220279168A1

公开(公告)日：2022-09-01

申请号：US17740591

申请日：2022-05-10

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang CHEN ,  Haitao YANG

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  G06T9/40 ,  H04N19/127

Abstract: A video picture prediction method and apparatus are provided, to provide a manner of determining a maximum length of a candidate motion vector list corresponding to a subblock merge mode. The method comprises: parsing a first indicator from a bitstream; if the first indicator indicates that a candidate mode used to inter predict the to-be-processed block comprises an affine mode, parsing a second indicator from the bitstream, where the second indicator is used to indicate a maximum length of a first candidate motion vector list, and the first candidate motion vector list is constructed for the to-be-processed block, a subblock merge prediction mode is used for the to-be-processed block; and determining the maximum length of the first candidate motion vector list based on the second indicator.

公开(公告)号：US20220094969A1

公开(公告)日：2022-03-24

申请号：US17540928

申请日：2021-12-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang CHEN ,  Sixin LIN ,  Hong ZHANG

IPC: H04N19/52 ,  H04N19/70 ,  H04N19/105 ,  H04N19/107 ,  H04N19/44

Abstract: An image prediction method and apparatus is disclosed. The image prediction method includes: determining, according to information about adjacent image units adjacent to a to-be-processed image unit, whether a set of candidate prediction modes for the to-be-processed image unit includes an affine merge mode, where the affine merge mode indicates that respective predicted images of the to-be-processed image unit and the adjacent image units of the to-be-processed image unit are obtained by using a same affine model; parsing a bitstream to obtain first indication information; determining, in the set of candidate prediction modes, a prediction mode for the to-be-processed image unit according to the first indication information; and determining a predicted image of the to-be-processed image unit according to the prediction mode. The method reduces a bit rate of encoding a prediction mode, thereby improving encoding efficiency.

公开(公告)号：US20190289313A1

公开(公告)日：2019-09-19

申请号：US16431298

申请日：2019-06-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang CHEN ,  Sixin LIN ,  Fan LIANG

IPC: H04N19/51 ,  H04N19/537 ,  H04N19/105 ,  H04N19/567 ,  H04N19/176 ,  H04N19/182 ,  H04N19/103 ,  H04N19/147

Abstract: A picture prediction method and a related apparatus are disclosed. A picture prediction method includes: determining K1 pixel samples in a picture block x, and determining a candidate motion information unit set corresponding to each pixel sample in the K1 pixel samples, where the candidate motion information unit set corresponding to each pixel sample includes at least one candidate motion information unit; determining a merged motion information unit set i including K1 motion information units, where each motion information unit in the merged motion information unit set i is selected from at least a part of motion information units in candidate motion information unit sets corresponding to different pixel samples in the K1 pixel samples; and predicting a pixel value of the picture block x by using a non-translational motion model and the merged motion information unit set i.

公开(公告)号：US20180205965A1

公开(公告)日：2018-07-19

申请号：US15923434

申请日：2018-03-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD,

Inventor： Huanbang CHEN ,  Sixin LIN ,  Hong ZHANG

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/44 ,  H04N19/107

Abstract: An image prediction method and apparatus is disclosed. The image prediction method includes: determining, according to information about adjacent image units adjacent to a to-be-processed image unit, whether a set of candidate prediction modes for the to-be-processed image unit includes an affine merge mode, where the affine merge mode indicates that respective predicted images of the to-be-processed image unit and the adjacent image units of the to-be-processed image unit are obtained by using a same affine model; parsing a bitstream to obtain first indication information; determining, in the set of candidate prediction modes, a prediction mode for the to-be-processed image unit according to the first indication information; and determining a predicted image of the to-be-processed image unit according to the prediction mode. The method reduces a bit rate of encoding a prediction mode, thereby improving encoding efficiency.

公开(公告)号：US20250056003A1

公开(公告)日：2025-02-13

申请号：US18807369

申请日：2024-08-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang CHEN ,  Haitao YANG ,  Jianle CHEN ,  Jiali FU

IPC: H04N19/139 ,  H04N19/119 ,  H04N19/176 ,  H04N19/61

Abstract: A motion vector prediction method includes parsing a bitstream to obtain an index value of a candidate motion vector list and constructing the candidate motion vector list that includes. candidate motion vectors of K control points of a current block. The candidate motion vectors of K control points are obtained based on a 2N-parameter affine transform model used for a neighboring block of the current block, where N and K are integers greater than or equal to 2 and less than or equal to 4 with N not being equal to K. The method further includes determining, in the candidate motion vector list, target candidate motion vectors of the K control points based on the index value and obtaining a predicted motion vector of each subblock of the current block based on the target candidate motion vectors of the K control points.

公开(公告)号：US20230232036A1

公开(公告)日：2023-07-20

申请号：US17994556

申请日：2022-11-28

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Xiang MA ,  Haitao YANG ,  Huanbang CHEN ,  Shan GAO

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/182

CPC classification number: H04N19/52 ,  H04N19/176 ,  H04N19/182

Abstract: A picture prediction method is provided, which includes: obtaining initial motion information of a current picture block; determining, based on a matching cost criterion, that positions of a pair of reference blocks are a position of a target forward reference block of the current picture block and a position of a target backward reference block of the current picture block, where positions of each pair of reference blocks include a position of a forward reference block and a position of a backward reference block; and for the positions of each pair of reference blocks, a first position offset and a second position offset are in a mirror relationship; and obtaining a predicted value of a pixel value of the current picture block based on a pixel value of the target forward reference block and a pixel value of the target backward reference block.

公开(公告)号：US20220345739A1

公开(公告)日：2022-10-27

申请号：US17858567

申请日：2022-07-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang CHEN ,  Xiang MA ,  Haitao YANG ,  Jianle CHEN

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: This application provides a video picture prediction method and apparatus, to resolve a problem in a conventional technology that a length of a coded video sequence is increased. The first type of identifier may be added to a bitstream. The first type of identifier is used to indicate whether an affine motion model-based inter prediction mode is enabled for a video picture. For a video picture or a picture block included in the slice for which the affine motion model does not need to be used, a parameter, related to the affine motion model, of the picture block may not need to be transmitted. On a decoder side, during decoding of the picture block, the parameter related to the affine motion model does not need to be parsed. This can reduce load of a decoder, increase a processing speed, and decrease a processing time.

公开(公告)号：US20220217332A1

公开(公告)日：2022-07-07

申请号：US17702026

申请日：2022-03-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Alexey Konstantinovich FILIPPOV ,  Haitao YANG ,  Huanbang CHEN ,  Vasily Alexeevich RUFITSKIY

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/46

Abstract: A computer-implemented method of determining whether an inter prediction process is enabled is provided in this application, the method comprising:
obtaining an indication, the indication indicating whether a slice-level weighted prediction mechanism is to be enabled in the inter prediction process;
determining, based on the indication, whether a non-rectangular merge mode or whether the slice-level weighted prediction mechanism is to be enabled in the inter prediction process.
Furthermore, an encoder for encoding a datastream, like a video stream, using an inter prediction process and a decoder for decoding an encoded datastream, like an encoded video stream, using an inter prediction process, are provided.