公开(公告)号：US20250039398A1

公开(公告)日：2025-01-30

申请号：US18914228

申请日：2024-10-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jicheng An ,  Xu Chen ,  Jianhua Zheng

IPC: H04N19/139 ,  H04N19/105 ,  H04N19/176 ,  H04N19/463 ,  H04N19/513 ,  H04N19/52 ,  H04N19/573 ,  H04N19/577

Abstract: An inter prediction method includes obtaining predicted motion information of a current image block, where the predicted motion information is used to obtain one or more motion vectors of the current image block, and the motion vectors include a forward MV and a backward MV for a bidirectional inter prediction. The disclosed method further includes determining a motion vector difference for the current image block, and calculating the motion vectors based on the predicted motion information and the motion vector difference, where the motion vector difference is shared by the forward MV and the backward MV.

公开(公告)号：US12143569B2

公开(公告)日：2024-11-12

申请号：US17872240

申请日：2022-07-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Na Zhang ,  Jicheng An ,  Quanhe Yu ,  Jianhua Zheng

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

Abstract: An inter prediction method is provided, including: obtaining a first reference frame index and a first motion vector of a to-be-processed block (101); deriving a second reference frame index from the first reference frame index, where the second reference frame index is different from the first reference frame index (102); scaling the first motion vector to obtain a second motion vector (103); obtaining a first reference block of the to-be-processed block according to the first reference frame index and the first motion vector (104); obtaining a second reference block of the to-be-processed block according to the second reference frame index and the second motion vector (105); and weighting the first reference block and the second reference block to obtain a combined prediction block (106). Each reference list for inter prediction is allowed to include two groups of motion information, which helps improve an inter prediction effect.

公开(公告)号：US11765378B2

公开(公告)日：2023-09-19

申请号：US16949793

申请日：2020-11-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xu Chen ,  Jicheng An ,  Jianhua Zheng

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

CPC classification number: H04N19/513 ,  H04N19/105 ,  H04N19/176

Abstract: Embodiments of this application disclose a method for obtaining a motion vector, including: determining a reference block of a to-be-processed block, wherein the reference block and the to-be-processed block have a preset temporal or spatial correlation, the reference block is obtained based on a prediction block of the reference block determined by a refined initial motion vector, the refined initial motion vector is obtained based on an initial motion vector and one or more preset motion vector offsets, and the initial motion vector is obtained based on a predicted motion vector of the reference block; and using the initial motion vector as a predicted motion vector of the to-be-processed block.

公开(公告)号：US11558623B2

公开(公告)日：2023-01-17

申请号：US17064719

申请日：2020-10-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jicheng An ,  Xu Chen ,  Jianhua Zheng

IPC: H04N19/139 ,  H04N19/463 ,  H04N19/52 ,  H04N19/577 ,  H04N19/573 ,  H04N19/105 ,  H04N19/176 ,  H04N19/513

Abstract: An inter prediction method includes obtaining predicted motion information of a current image block, where the predicted motion information is used to obtain one or more motion vectors of the current image block, the motion vectors include a forward MV and a backward MV for a bidirectional inter prediction, determining a motion vector difference for the current image block, and calculating the motion vectors based on the predicted motion information and the motion vector difference, where the motion vector difference is shared by the forward MV and the backward MV.

公开(公告)号：US20220345716A1

公开(公告)日：2022-10-27

申请号：US17696132

申请日：2022-03-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Na Zhang ,  Jicheng An ,  Jianhua Zheng

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

Abstract: A method for predicting motion information of a picture block and a related product is provided. The method includes: determining a candidate motion information list of a current picture block, where the candidate motion information list includes at least one combined candidate motion information, one combined candidate motion information is obtained by weighting P candidate motion information by using corresponding weighting factors; determining target motion information in the candidate motion information list; and predicting motion information of the current picture block based on the target motion information.

公开(公告)号：US11457222B2

公开(公告)日：2022-09-27

申请号：US17035711

申请日：2020-09-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Na Zhang ,  Jicheng An ,  Jianhua Zheng

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: A method and an apparatus and for intra prediction of a picture block are provided, to provide a manner of predicting a current block by using spatial non-adjacent blocks or a temporal neighboring block, thereby improving coding performance. In various embodiments, a first luma intra mode set is constructed; and a bitstream is parsed to obtain a first identifier. In those embodiments, when the first identifier indicates that a luma prediction mode of the current block belongs to the first luma intra mode set, the bitstream is parsed to obtain a second identifier. The second identifier indicates that a candidate luma prediction mode in the first luma intra mode set is used as the luma prediction mode of the current block. Still in those embodiments, a luma prediction value of the current block is obtained based on the luma prediction mode of the current block.

公开(公告)号：US11190778B2

公开(公告)日：2021-11-30

申请号：US16577507

申请日：2019-09-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jicheng An ,  Jianhua Zheng

IPC: H04B1/66 ,  H04N19/186 ,  G06T5/00 ,  H04N19/176 ,  H04N19/64 ,  G06T5/20

Abstract: An image filtering method and apparatus, where the method includes determining a filter coefficient of a chroma filter based on a filter coefficient of a luma filter, where the luma filter and the chroma filter are respectively applied to perform filtering processing on luma samples and chroma samples of a to-be-processed image, all filter coefficients of the luma filter present a first geometric distribution, all filter coefficients of the chroma filter present a second geometric distribution, the first geometric distribution and the second geometric distribution are similar shapes, and a filter coefficient of the chroma filter at an edge of the second geometric distribution is calculated using one or more filter coefficients of the luma filter at an edge of the first geometric distribution, and respectively performing filtering processing on the luma samples and the chroma samples using the luma filter and the chroma filter.

公开(公告)号：US11146826B2

公开(公告)日：2021-10-12

申请号：US16457041

申请日：2019-06-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jicheng An ,  Jianhua Zheng

IPC: H04N19/86 ,  H04N19/119 ,  H04N19/176 ,  H04N19/186

Abstract: An image filtering method and apparatus are disclosed. The method includes: obtaining a first index of the luma blocks, wherein the first index represents a filter type applicable to the luma blocks; obtaining a second index of the first chroma blocks, wherein the second index represents a filter type applicable to the first chroma blocks; filtering the luma blocks by applying a first filter in a filter set, the first filter corresponding to the first index; and filtering the first chroma blocks by applying a second filter in the filter set, the second filer corresponding to the second index.