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：US20230156202A1

公开(公告)日：2023-05-18

申请号：US18098997

申请日：2023-01-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang MA ,  Jianle CHEN ,  Haitao YANG

IPC: H04N19/196 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

CPC classification number: H04N19/196 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: This application provides a chroma block prediction method and apparatus. The method includes: obtaining a maximum luma value and a minimum luma value based on luma samples corresponding to neighboring samples of a target chroma block, and calculating a first difference between the maximum luma value and the minimum luma value; if the first difference is not equal to 0, processing the first difference based on a quantity of significant bits of the first difference and a first preset bit depth to obtain a second difference; and determining, based on a first chroma value, a second chroma value, and the second difference, an intra prediction model parameter corresponding to the target chroma block, and determining prediction information of the target chroma block based on the intra prediction model parameter and luma reconstruction information corresponding to the target chroma 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：US20220337881A1

公开(公告)日：2022-10-20

申请号：US17852903

申请日：2022-06-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiang MA ,  Haitao YANG

IPC: H04N19/70 ,  H04N19/174 ,  H04N19/172 ,  H04N19/117 ,  H04N19/186

Abstract: The present disclosure provides a method of decoding a coded video bitstream, the method comprising: obtaining a picture-level syntax element included in a picture header of the current picture by parsing the video bitstream, wherein the picture-level syntax element is used to specify whether an adaptive loop filter (ALF) is enabled for the current picture; in case that the picture-level syntax element specifies the adaptive loop filter is enabled for the current picture, obtaining a parameter set identifier included in the picture header, wherein the parameter set identifier is used to indicate a first parameter set comprising a set of ALF parameters, and wherein a temporal identifier of the first parameter set is less than or equal to a temporal identifier of the current picture; performing the adaptive loop filter on at least one slice of the current picture based on the first parameter set.

公开(公告)号：US20250097437A1

公开(公告)日：2025-03-20

申请号：US18902428

申请日：2024-09-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang MA ,  Jianle CHEN ,  Haitao YANG

IPC: H04N19/196 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: This application provides a chroma block prediction method and apparatus. The method includes: obtaining a maximum luma value and a minimum luma value based on luma samples corresponding to neighboring samples of a target chroma block, and calculating a first difference between the maximum luma value and the minimum luma value; if the first difference is not equal to 0, processing the first difference based on a quantity of significant bits of the first difference and a first preset bit depth to obtain a second difference; and determining, based on a first chroma value, a second chroma value, and the second difference, an intra prediction model parameter corresponding to the target chroma block, and determining prediction information of the target chroma block based on the intra prediction model parameter and luma reconstruction information corresponding to the target chroma block.

公开(公告)号：US20240195984A1

公开(公告)日：2024-06-13

申请号：US18581610

申请日：2024-02-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang MA ,  Fan MU ,  Yin ZHAO ,  Haitao YANG

IPC: H04N19/159 ,  H04N19/132 ,  H04N19/176

CPC classification number: H04N19/159 ,  H04N19/132 ,  H04N19/176

Abstract: This application provides a chroma block prediction method and apparatus. The method includes: obtaining chroma values of chroma samples; obtaining, luma values of luma samples corresponding to the chroma samples; obtaining, from the luma values, a first luma set and a second luma set; grouping the chroma values into a first chroma set and a second chroma set; determining a scaling coefficient in a linear model based on an average value of luma values in the first luma set, an average value of luma values in the second luma set, an average value of chroma values in the first chroma set, and an average value of chroma values in the second chroma set; determining, based on the scaling coefficient, an offset factor in the linear model; and determining prediction information of the chroma block based on the scaling coefficient and the offset factor.

公开(公告)号：US20240064318A1

公开(公告)日：2024-02-22

申请号：US18456346

申请日：2023-08-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Alexey Aleksandrovich LETUNOVSKIY ,  Denis Vladimirovich PARKHOMENKO ,  Alexander Andreevich PLETNEV ,  Andrey Sergeevich SHUTKIN ,  Anuar TASKYNOV ,  Haitao YANG ,  Xiang MA

IPC: H04N19/42 ,  G06N3/0455 ,  G06N3/084 ,  H04N19/172 ,  H04N19/463

CPC classification number: H04N19/42 ,  G06N3/0455 ,  G06N3/084 ,  H04N19/172 ,  H04N19/463

Abstract: The present disclosure relates to encoding and decoding of a picture or a plurality of pictures (e.g. video) using a neural network which is partially trained online. Accordingly, at an encoder one or more layers are selected which are to be trained. Then, the training of the neural network is performed in which parameters of the selected layers are updated. The parameters of the remaining layers are maintained and not updated. The updated parameters are provided within a bitstream. The picture(s) is/are also encoded. The decoder receives an indication of the updated parameters, updates only those parameters indicated, and applies the so obtained neural network.

公开(公告)号：US20210227229A1

公开(公告)日：2021-07-22

申请号：US17224326

申请日：2021-04-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang MA ,  Jianle CHEN ,  Haitao YANG

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

Abstract: An intra prediction method using a cross component liner prediction mode (CCLM), includes: obtaining neighboring luma samples of a luma block; obtaining a mean luma value of the neighboring luma samples; obtaining neighboring chroma samples of a current chroma block, wherein the current chroma block corresponds to the luma block; obtaining a mean chroma value of the neighboring chroma samples; calculating a second linear model coefficient based on a first linear model coefficient, the mean luma value, and the mean chroma value; and obtaining a predictor for the current chroma block based on the first linear model coefficient and the second linear model coefficient. The method can increase the accuracy of the second linear model coefficient, and correspondingly increase the accuracy of the predictor for the current chroma block.

公开(公告)号：US20240397107A1

公开(公告)日：2024-11-28

申请号：US18739606

申请日：2024-06-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang MA ,  Haitao YANG

IPC: H04N19/70 ,  H04N19/117 ,  H04N19/172 ,  H04N19/174 ,  H04N19/186

Abstract: The present disclosure provides a method of decoding a coded video bitstream, the method comprising: obtaining a picture-level syntax element included in a picture header of the current picture by parsing the video bitstream, wherein the picture-level syntax element is used to specify whether an adaptive loop filter (ALF) is enabled for the current picture; in case that the picture-level syntax element specifies the adaptive loop filter is enabled for the current picture, obtaining a parameter set identifier included in the picture header, wherein the parameter set identifier is used to indicate a first parameter set comprising a set of ALF parameters, and wherein a temporal identifier of the first parameter set is less than or equal to a temporal identifier of the current picture; performing the adaptive loop filter on at least one slice of the current picture based on the first parameter set.

公开(公告)号：US20230039840A1

公开(公告)日：2023-02-09

申请号：US17954861

申请日：2022-09-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Haitao YANG ,  Lian ZHANG ,  Xiang MA

IPC: H04N19/13 ,  H04N19/91 ,  H04N19/18 ,  H04N19/176

Abstract: The present application disclose a picture processing method and apparatus, which are applicable to a video picture processing scenario. The method includes: obtaining at least two transform coefficient blocks, where each of the at least two transform coefficient blocks includes at least two transform coefficients that correspond to different frequency points; determining, according to a preset frequency point scanning order, the transform coefficients that are in the at least two transform coefficient blocks and that correspond to a selected frequency point; and encoding, according to a preset coefficient scanning order, each transform coefficient corresponding to the selected frequency point, to obtain picture encoded information.