公开(公告)号：US20220116638A1

公开(公告)日：2022-04-14

申请号：US17561049

申请日：2021-12-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/44 ,  H04N19/176 ,  H04N19/136 ,  H04N19/625

Abstract: A video decoding method includes determining a usage of an SVT-vertical (V) or an SVT-horizontal (H) for a residual block; determining a transform block position of a transform block of the residual block; determining a transform type of the transform block, wherein the transform type indicates a horizontal transform and a vertical transform for the transform block, wherein at least one of the horizontal transform or the vertical transform is a discrete sine transform (DST)-7; and reconstructing the residual block based on the transform type, the transform block position, and transform coefficients of the transform block.

公开(公告)号：US11277648B2

公开(公告)日：2022-03-15

申请号：US16949362

申请日：2020-10-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Shan Liu

IPC: H04N19/96 ,  H04N19/172 ,  H04N19/184

Abstract: Embodiments of this application disclose a decoding method includes: obtaining a bitstream including picture data; parsing the bitstream to obtain node split mode information of a first-level coding tree and node split mode information of a second-level coding tree, if the split mode corresponding to the first node is no further splitting, parsing the bitstream to obtain encoding information of the first node; and decoding and reconstructing, based on the encoding information of the first node, a coding unit corresponding to the first node, to obtain a picture corresponding to the picture data.

公开(公告)号：US11277629B2

公开(公告)日：2022-03-15

申请号：US17150963

申请日：2021-01-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiang Ma ,  Haitao Yang ,  Huanbang Chen ,  Jianle Chen

IPC: H04N19/46 ,  H04N19/132 ,  H04N19/159 ,  H04N19/174 ,  H04N19/51 ,  H04N19/70

Abstract: A method of determining one or more candidate prediction modes, the method comprises deriving, by a processor, a first indicator by parsing a bitstream, wherein the first indicator specifies whether any affine model is a candidate motion model for an image block in a preset area; determining, by the processor, that the first indicator is set to 1; deriving, by the processor and based on the determination that the first indicator is set to 1, a second indicator by parsing the bitstream, wherein the second indicator specifies whether a 6-parameter affine model is a candidate motion model for the image block; and determining, by the processor, one or more candidate prediction modes for the image block based on the first indicator and the second indicator.

公开(公告)号：US20220070488A1

公开(公告)日：2022-03-03

申请号：US17472235

申请日：2021-09-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen

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

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：US11259031B2

公开(公告)日：2022-02-22

申请号：US16752259

申请日：2020-01-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hong Zhang ,  Haitao Yang ,  Shan Liu

IPC: H04N19/176 ,  H04N19/126 ,  H04N19/132 ,  H04N19/159 ,  H04N19/196

Abstract: An image processing method and device include parsing a code stream to obtain a first quantization parameter of a current image area in an original resolution coding scheme, a second quantization parameter of the current image area in a downsampling coding scheme, a coding scheme of a current image block in the current image area, a quantization coefficient of the current image block, and a prediction signal of the current image block, determining a quantization parameter of the current image block according to the coding scheme, and reconstructing the current image block based on the quantization parameter, the quantization coefficient, and the prediction signal to obtain a current reconstructed image block.

公开(公告)号：US20220007046A1

公开(公告)日：2022-01-06

申请号：US17473517

申请日：2021-09-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Xiang Ma ,  Haitao Yang ,  Lian Zhang

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/182

Abstract: Disclosed are an inter prediction method based on an affine prediction mode and a related apparatus. The method includes: obtaining a predicted pixel value of a current affine block; obtaining an LIC flag of the current affine block, where the LIC flag is used to indicate whether local illumination compensation LIC is applied to the current affine block; and when the LIC flag indicates that LIC is applied to the current affine block, updating the predicted pixel value of the current affine block based on an update coefficient for LIC, to obtain an updated predicted pixel value of the current affine block.

公开(公告)号：US20210250581A1

公开(公告)日：2021-08-12

申请号：US17240508

申请日：2021-04-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Weiwei Xu ,  Haitao Yang ,  Yin Zhao

IPC: H04N19/11 ,  H04N19/137 ,  H04N19/132 ,  H04N19/159 ,  H04N19/513 ,  H04N19/70 ,  H04N19/176

Abstract: A picture prediction method includes receiving a bitstream, parsing the bitstream to obtain a prediction mode of a current block, when the prediction mode of the current block is a combined intra and inter prediction mode, selecting an execution manner of a triangular prediction unit mode according to a preset policy, determining motion information of the current block according to the execution manner of the triangular prediction unit mode, performing a motion compensation process based on the motion information, to obtain an inter prediction sample, obtaining an intra prediction sample according to the prediction mode of the current block, and combining the inter prediction sample and the intra prediction sample to obtain a prediction picture of the current block.

公开(公告)号：US11082709B2

公开(公告)日：2021-08-03

申请号：US16744987

申请日：2020-01-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haitao Yang ,  Hong Zhang ,  Shan Liu

IPC: H04N19/30 ,  H04N19/117 ,  H04N19/176 ,  H04N19/186

Abstract: A chroma prediction method includes: obtaining luma information and chroma information of a to-be-processed image block, first processing information, and second processing information, where the first processing information indicates a downsampling processing manner used for a luma component of the to-be-processed image block, and the second processing information indicates a downsampling processing manner used for a chroma component of the to-be-processed image block; reconstructing a transient luma block of the to-be-processed image block based on the luma information of the to-be-processed image block, where a resolution of the transient luma block is determined by using a sampling format of the to-be-processed image block and the first processing information; and obtaining a prediction block of a transient chroma block of the to-be-processed image block based on the resolution of the transient luma block, the sampling format of the to-be-processed image block, and the second processing information.

公开(公告)号：US20210218968A1

公开(公告)日：2021-07-15

申请号：US17249946

申请日：2021-03-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Roman Igorevich Chernyak ,  Alexander Alexandrovich Karabutov ,  Sergey Yurievich Ikonin ,  Timofey Mikhailovich Solovyev ,  Haitao Yang ,  Jianle Chen ,  Yin Zhao

IPC: H04N19/124 ,  H04N19/132 ,  H04N19/105 ,  H04N19/46 ,  H04N19/186 ,  H04N19/176

Abstract: A method for inverse quantization of a current block of a picture is provided. The method is performed by a decoder, and the picture comprises a luminance component and a chrominance component, where the luminance component and the chrominance component are partitioned into multiple blocks. The method includes obtaining one or more existing quantization parameter (QP) values from a received bitstream, wherein the one or more existing QP values are associated with a current block in the chrominance component; determining a QP value for the current block in the chrominance component based on the one or more existing QP values; performing inverse quantization on the current block in the chrominance component using the determined QP value.

公开(公告)号：US20210168391A1

公开(公告)日：2021-06-03

申请号：US17150963

申请日：2021-01-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiang Ma ,  Haitao Yang ,  Huanbang Chen ,  Jianle Chen

IPC: H04N19/46 ,  H04N19/70 ,  H04N19/132 ,  H04N19/159 ,  H04N19/51 ,  H04N19/174

Abstract: A method of determining one or more candidate prediction modes, the method comprises deriving, by a processor, a first indicator by parsing a bitstream, wherein the first indicator specifies whether any affine model is a candidate motion model for an image block in a preset area; determining, by the processor, that the first indicator is set to 1; deriving, by the processor and based on the determination that the first indicator is set to 1, a second indicator by parsing the bitstream, wherein the second indicator specifies whether a 6-parameter affine model is a candidate motion model for the image block; and determining, by the processor, one or more candidate prediction modes for the image block based on the first indicator and the second indicator.