公开(公告)号：US12058378B2

公开(公告)日：2024-08-06

申请号：US17852903

申请日：2022-06-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiang Ma ,  Haitao Yang

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

CPC classification number: 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：US12058337B2

公开(公告)日：2024-08-06

申请号：US17708866

申请日：2022-03-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Timofey Mikhailovich Solovyev ,  Maxim Borisovitch Sychev ,  Huanbang Chen ,  Alexander Alexandrovich Karabutov ,  Roman Igorevich Chernyak ,  Sergey Yurievich Ikonin ,  Haitao Yang ,  Elena Alexandrovna Alshina

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/30 ,  H04N19/46

CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/30 ,  H04N19/46

Abstract: A method of coding implemented by a decoding/encoding device for coding video data includes for a block coded in affine mode, determining control point motion vectors (CPMVs); determining a reference area in a reference picture corresponding to a sub-block of the affine coded block based on the CPMVs; setting a variable clipMVX equal to TRUE if a size of the reference area is greater than a predefined threshold, otherwise setting a variable clipMVX equal to FALSE; deriving a pixel-based motion vector field for the affine coded block; wherein, if the variable clipMVX is equal to TRUE, the deriving the pixel-based motion vector field further comprises motion vector clipping based on a first clipping range, wherein the first clipping range is determined based on the determined CPMVs and a size of the affine coded block.

公开(公告)号：US20240244205A1

公开(公告)日：2024-07-18

申请号：US18418698

申请日：2024-01-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/12 ,  H04N19/147 ,  H04N19/176 ,  H04N19/61 ,  H04N19/625 ,  H04N19/96

CPC classification number: H04N19/12 ,  H04N19/147 ,  H04N19/176 ,  H04N19/61 ,  H04N19/625 ,  H04N19/96

Abstract: A mechanism for position dependent spatial varying transform (SVT) for video coding. A prediction block and a corresponding transformed residual block are received at a decoder. A type of spatial varying transform (SVT) employed to generate the transformed residual block is determined. A position of the SVT relative to the transformed residual block is also determined. An inverse of the SVT is applied to the transformed residual block to reconstruct a reconstructed residual block. The reconstructed residual block is then combined with the prediction block to reconstruct an image block.

公开(公告)号：US12010293B2

公开(公告)日：2024-06-11

申请号：US17451992

申请日：2021-10-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xu Chen ,  Huanbang Chen ,  Haitao Yang ,  Lian Zhang

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

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: A picture prediction method includes: determining whether a merge mode is used for a current picture block; when the merge mode is used for the current picture block, determining whether a regular merge mode is available; when the regular merge mode is unavailable, and a high-layer syntax element sps_triangle_enabled_flag corresponding to a triangle partition mode (TPM), indicates that the TPM is forbidden to be used, determining a combined intra and inter prediction (CIIP) mode as a target merge mode used for the current picture block and predicting the current picture block based on the target merge mode.

公开(公告)号：US12003733B2

公开(公告)日：2024-06-04

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 ,  H04N19/119 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/52

CPC classification number: H04N19/139 ,  H04N19/119 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/52

Abstract: The present invention 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：US11985354B2

公开(公告)日：2024-05-14

申请号：US17676966

申请日：2022-02-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Timofey Mikhailovich Solovyev ,  Maxim Borisovitch Sychev ,  Huanbang Chen ,  Alexander Alexandrovich Karabutov ,  Roman Igorevich Chernyak ,  Sergey Yurievich Ikonin ,  Haitao Yang ,  Elena Alexandrovna Alshina

IPC: H04N19/82 ,  H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/615 ,  H04N19/80

CPC classification number: H04N19/615 ,  H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/80

Abstract: A method for coding a video implemented in an encoder or a decoder, comprising: determining control point motion vectors, CPMVs, for a block according to affine inter-prediction, according to a preselected affine motion model, the block being an affine block; performing motion compensation for the block using a pixel-based motion vector field according to values of the CPMVs, upon fulfilling at least one of the following conditions: A) for a predefined size of a sub-block of M×M, during processing of one line, respectively, of the sub-block the number of lines of the reference picture is less than N, where N is an integer and N is larger than 2.

公开(公告)号：US20240107005A1

公开(公告)日：2024-03-28

申请号：US18456528

申请日：2023-08-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang Ma ,  Jianle Chen ,  Yin Zhao ,  Haitao Yang

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

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: An intra prediction method by using cross component liner prediction mode (CCLM), includes: determining a luma block corresponding to a current chroma block; obtaining luma reference samples of the luma block based on determining L available chroma reference samples of the current chroma block, wherein the obtained luma reference samples of the luma block are down-sampled luma reference samples; calculating linear model coefficients based on the luma reference samples and chroma reference samples that correspond to the luma reference samples; and obtaining a prediction for the current chroma block based on the linear model coefficients and values of a down-sampled luma block of the luma block.

公开(公告)号：US11924458B2

公开(公告)日：2024-03-05

申请号：US17731109

申请日：2022-04-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/577 ,  H04N19/176 ,  H04N19/513 ,  H04N19/70

CPC classification number: H04N19/513 ,  H04N19/176 ,  H04N19/577 ,  H04N19/70

Abstract: Embodiments of this application relate to the field of video picture coding technologies, and disclose a bidirectional inter prediction method and apparatus, to improve coding efficiency. The method includes: obtaining indication information, where the indication information is used to indicate that second motion information is determined based on first motion information, the first motion information is motion information of a current picture block in a first direction, and the second motion information is motion information of the current picture block in a second direction; obtaining the first motion information; determining the second motion information based on the first motion information; and determining prediction samples of the current picture block based on the first motion information and the second motion information.

公开(公告)号：US11924438B2

公开(公告)日：2024-03-05

申请号：US17345295

申请日：2021-06-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yin Zhao ,  Haitao Yang ,  Riyang Zhao ,  Zhongliang Li ,  Lian Zhang

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/159 ,  H04N19/119 ,  H04N19/176 ,  H04N19/186

Abstract: Embodiments include a picture reconstruction method and apparatus for a video picture. The picture reconstruction method includes: obtaining a prediction mode of a current coding unit, and/or obtaining a prediction partition mode of the current coding unit, where the current coding unit includes a luma coding block and a chroma coding block, and the prediction partition mode is a mode of splitting the current coding unit into prediction blocks or prediction units; obtaining a transform block of the current coding unit based on the prediction partition mode and/or the prediction mode; and generating a reconstructed picture block of the current coding unit based on the transform block. According to the method in the embodiments, video coding efficiency can be improved.

公开(公告)号：US11902506B2

公开(公告)日：2024-02-13

申请号：US17374004

申请日：2021-07-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Yin Zhao ,  Haitao Yang ,  Lian Zhang

IPC: H04N19/103 ,  H04N19/50 ,  H04N19/96

CPC classification number: H04N19/103 ,  H04N19/50 ,  H04N19/96

Abstract: This application discloses a processing method applied to video encoding or video decoding. The method includes: obtaining size information of a current block; determining a context model index ctxInc of a flag of the current block based on the obtained size information of the current block and a size-based constraint; and performing subsequent processing based on the context model index ctxInc of the flag of the current block. The method can be used to improve coding efficiency.