公开(公告)号：US20200162749A1

公开(公告)日：2020-05-21

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 ,  H04N19/159 ,  H04N19/196 ,  H04N19/132

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：US10536692B2

公开(公告)日：2020-01-14

申请号：US15454356

申请日：2017-03-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xin Huang ,  Hong Zhang ,  Haitao Yang

IPC: H04N19/105 ,  H04N19/567 ,  H04N19/44 ,  H04N19/51 ,  H04N19/182 ,  H04N19/513

Abstract: A picture prediction method and a related apparatus are disclosed, which includes: determining N templates whose degrees of matching with a current template meet a preset condition, where the current template is a template corresponding to a current picture block, and the M templates are obtained by searching reference pictures of the current picture block; determining a weight of a pixel area in a picture block corresponding to each template in the N templates, where weights of at least two pixel areas in a picture block corresponding to at least one template in the N templates are different; and calculating a predicted pixel value of a pixel area in the current picture block based on the weight and a pixel value of the pixel area in the picture block corresponding to each template in the N templates, where the pixel area includes at least one pixel.

公开(公告)号：US20180184108A1

公开(公告)日：2018-06-28

申请号：US15901410

申请日：2018-02-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hong Zhang ,  Haitao Yang

IPC: H04N19/513

CPC classification number: H04N19/513 ,  H04N19/174 ,  H04N19/31 ,  H04N19/40 ,  H04N19/52 ,  H04N19/53 ,  H04N19/537 ,  H04N19/567 ,  H04N19/573 ,  H04N19/577

Abstract: A motion vector field coding and decoding method, where the method includes obtaining an original signal of a current motion vector field block, where the current motion vector field block is obtained by dividing a current motion vector field into blocks, and the current motion vector field is a motion vector field corresponding to a video frame at a moment t, obtaining a prediction signal of the current motion vector field block and prediction information of the current motion vector field block, calculating a prediction residual signal of the current motion vector field block according to the prediction signal and the original signal, where the prediction residual signal is used to indicate a residual between the original signal and the prediction signal, and writing the prediction information and the prediction residual signal into a bitstream.

公开(公告)号：US20180070099A1

公开(公告)日：2018-03-08

申请号：US15797728

申请日：2017-10-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hong Zhang ,  Haitao Yang

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/139 ,  H04N19/44 ,  H04N19/172 ,  H04N19/182

Abstract: A video coding method includes obtaining a first motion vector field (MVF) set, obtaining a plurality of second MVFs according to the first MVF set and based on a preset vector operation method, determining a motion compensation prediction (MCP) signal of the target sub picture block from M MCP reference pictures according to the plurality of second MVFs and based on an MCP algorithm, obtaining a prediction residual of the target sub picture block according to a picture signal of the target sub picture block and the MCP signal of the target sub picture block, performing coding processing on the prediction residual of the target sub picture block to obtain a coded signal of the prediction residual of the target sub picture block, and sending the coded signal of the prediction residual of the target sub picture block to a peer decoder.

公开(公告)号：US12192494B2

公开(公告)日：2025-01-07

申请号：US17303886

申请日：2021-06-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haitao Yang ,  Hong Zhang ,  Shan Liu

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

Abstract: A prediction method includes: performing downsampling on a luma component of a to-be-processed image block to obtain an initial signal of the luma component; obtaining a residual signal of the luma component based on the obtained initial signal of the luma component; obtaining a residual signal of a chroma component of the to-be-processed image block based on the chroma component of the to-be-processed image block without downsampling. The method further includes: respectively performing a transform on the residual signal of the luma component and the residual signal of the chroma component, to obtain transform coefficients, performing quantization on the obtained transform coefficients, to obtain quantization coefficients, and performing entropy encoding on the obtained quantization coefficients to obtain a bitstream.

公开(公告)号：US20240357158A1

公开(公告)日：2024-10-24

申请号：US18612423

申请日：2024-03-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hong Zhang ,  Haitao Yang

IPC: H04N19/513 ,  H04N19/119 ,  H04N19/139 ,  H04N19/176 ,  H04N19/196 ,  H04N19/52 ,  H04N19/53 ,  H04N19/54 ,  H04N19/57 ,  H04N19/573 ,  H04N19/82

CPC classification number: H04N19/521 ,  H04N19/119 ,  H04N19/139 ,  H04N19/176 ,  H04N19/196 ,  H04N19/52 ,  H04N19/53 ,  H04N19/54 ,  H04N19/57 ,  H04N19/573 ,  H04N19/82

Abstract: The present disclosure provides a video picture coding method, a video picture decoding method, a coding device, and a decoding device. The method includes: determining a distance between control points for an affine picture block; determining a motion vector difference for the affine picture block, motion vectors of the control points being used to determine the motion vector difference; and performing coding processing on the affine picture block over a size that includes a horizontal length and a vertical length, wherein the horizontal length and the vertical length vary based on the distance between the control points, the motion vector difference, and a motion vector precision.

公开(公告)号：US12058365B2

公开(公告)日：2024-08-06

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 ,  H04N19/105 ,  H04N19/107 ,  H04N19/44 ,  H04N19/54 ,  H04N19/70

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/107 ,  H04N19/44 ,  H04N19/70 ,  H04N19/54

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：US11102501B2

公开(公告)日：2021-08-24

申请号：US15901410

申请日：2018-02-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hong Zhang ,  Haitao Yang

IPC: H04N19/174 ,  H04N19/31 ,  H04N19/513 ,  H04N19/52 ,  H04N19/573 ,  H04N19/567 ,  H04N19/577 ,  H04N19/537 ,  H04N19/40 ,  H04N19/53

Abstract: A motion vector field coding and decoding method, where the method includes obtaining an original signal of a current motion vector field block, where the current motion vector field block is obtained by dividing a current motion vector field into blocks, and the current motion vector field is a motion vector field corresponding to a video frame at a moment t, obtaining a prediction signal of the current motion vector field block and prediction information of the current motion vector field block, calculating a prediction residual signal of the current motion vector field block according to the prediction signal and the original signal, where the prediction residual signal is used to indicate a residual between the original signal and the prediction signal, and writing the prediction information and the prediction residual signal into a bitstream.

公开(公告)号：US20210105502A1

公开(公告)日：2021-04-08

申请号：US17122844

申请日：2020-12-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hong Zhang ,  Haitao Yang

IPC: H04N19/513 ,  H04N19/119 ,  H04N19/139 ,  H04N19/176 ,  H04N19/196 ,  H04N19/52 ,  H04N19/53 ,  H04N19/54 ,  H04N19/57 ,  H04N19/573

Abstract: The present disclosure provides a video picture coding method, a video picture decoding method, a coding device, and a decoding device. The method includes: determining a distance between control points for an affine picture block; determining a motion vector difference for the affine picture block, motion vectors of the control points being used to determine the motion vector difference; and performing coding processing on the affine picture block over a size that includes a horizontal length and a vertical length, wherein the horizontal length and the vertical length vary based on the distance between the control points, the motion vector difference, and a motion vector precision.

公开(公告)号：US10887618B2

公开(公告)日：2021-01-05

申请号：US16505182

申请日：2019-07-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hong Zhang ,  Haitao Yang

IPC: H04N19/119 ,  H04N19/139 ,  H04N19/176 ,  H04N19/196 ,  H04N19/52 ,  H04N19/53 ,  H04N19/54 ,  H04N19/57 ,  H04N19/82 ,  H04N19/513 ,  H04N19/573

Abstract: The present invention provides a video picture coding method, a video picture decoding method, a coding device, and a decoding device. The method includes: determining a motion vector difference of an affine picture block; determining motion vector precision of the affine picture block; determining a size of an affine motion compensation picture subblock in the affine picture block according to the motion vector difference, the motion vector precision, and a distance between control points in the affine picture block, where the control points are pixels used to determine the motion vector difference; and performing coding processing on the affine picture block according to the size of the affine motion compensation picture subblock. In this way, a picture subblock of an appropriate size is selected, so that coding complexity can be reduced, and coding efficiency can be improved.