公开(公告)号：US11245932B2

公开(公告)日：2022-02-08

申请号：US17066936

申请日：2020-10-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhao Wang ,  Siwei Ma ,  Shan Gao ,  Haitao Yang

IPC: H04N19/96 ,  H04N19/176 ,  H04N19/119 ,  H04N19/157 ,  H04N19/167

Abstract: A decoding method includes: parsing a data stream, and if partitioning an image block with a size of 2N×2N using a quadtree partition pattern is allowed, processing a 2N×N first subimage block and a 2N×N second subimage block or an N×2N first subimage block and an N×2N second subimage block in a constraint subimage processing mode, wherein an image block partition pattern obtained for the partitioned second subimage block and the partitioned first subimage block is different from an image block partition pattern obtained after the 2N×2N image block is partitioned using the quadtree partition pattern, where the 2N×N first subimage block and the 2N×N second subimage block or the N×2N first subimage block and the N×2N second subimage block are obtained by partitioning the image block with the size of 2N×2N.

公开(公告)号：US11240529B2

公开(公告)日：2022-02-01

申请号：US17012658

申请日：2020-09-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Sixin Lin ,  Ruopu Huang ,  Haitao Yang

IPC: H04N19/52 ,  H04N19/537 ,  H04N19/513 ,  H04N19/523 ,  H04N19/159 ,  H04N19/176 ,  H04N19/56

Abstract: A picture prediction method includes: determining motion vectors of W control points in a current picture block; obtaining motion vectors of P pixel units of the current picture block by using a motion model and the motion vectors of the W control points, where precision of the determined motion vectors of the W control points is 1/n of pixel precision, precision of the motion vector of each of the P pixel units is 1/N of the pixel precision, the motion vector of each of the P pixel units is used to determine a corresponding reference pixel unit in a reference picture of a corresponding pixel unit; and performing interpolation filtering on a pixel of the corresponding reference pixel unit by using an interpolation filter with a phase of Q, to obtain a predicted pixel value of each of the P pixel units.

公开(公告)号：US20220030222A1

公开(公告)日：2022-01-27

申请号：US17492122

申请日：2021-10-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiang Ma ,  Haitao Yang

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/70 ,  H04N19/172

Abstract: A method of decoding a coded video bitstream includes obtaining a sequence parameter set (SPS)-level syntax element from the bitstream, wherein that the SPS-level syntax element equals to a preset value specifies that no video parameter set (VPS) is referred to by a SPS, and the SPS-level syntax element greater than the preset value specifies that the SPS refers to a VPS, obtaining, as the SPS-level syntax element is greater than the preset value, an inter-layer enabled syntax element specifying whether one or more inter-layer reference pictures (ILRPs) are enabled to be used for the inter prediction of one or more coded pictures, and predicting one or more coded pictures based on the value of the inter-layer enabled syntax element.

公开(公告)号：US20210329261A1

公开(公告)日：2021-10-21

申请号：US17365372

申请日：2021-07-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang Ma ,  Fan Mu ,  Yin Zhao ,  Haitao Yang

IPC: 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：US20210297656A1

公开(公告)日：2021-09-23

申请号：US17222820

申请日：2021-04-05

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

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

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：US11128874B2

公开(公告)日：2021-09-21

申请号：US16289250

申请日：2019-02-28

Applicant: Huawei Technologies Co., Ltd. ,  University of Science and Technology of China

Inventor： Xiang Ma ,  Haitao Yang ,  Li Li ,  Houqiang Li

IPC: H04N19/167 ,  H04N19/105 ,  H04N19/176 ,  H04N19/513 ,  H04N19/59 ,  H04N19/182 ,  H04N19/51

Abstract: Embodiments of the present invention provide a motion compensating prediction method and a motion compensating prediction apparatus. The motion compensating prediction method includes: determining a location of an initial reference pixel of a current pixel in a reference image, where the current pixel is located in a first sub-image of a current image; when the initial reference pixel is located outside a second sub-image that is in the reference image and that is at a location corresponding to the first sub-image, determining a location of a target reference pixel of the current pixel in the reference image based on the location of the initial reference pixel; and determining a predicted value of a pixel value of the current pixel based on a pixel value of the target reference pixel and/or a pixel value of a pixel near the target reference pixel.

公开(公告)号：US20210195198A1

公开(公告)日：2021-06-24

申请号：US17195798

申请日：2021-03-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Haitao Yang

IPC: H04N19/13 ,  H04N19/70 ,  H04N19/176 ,  H04N19/159 ,  H04N19/52

Abstract: A video decoding method includes obtaining a to-be-entropy-decoded syntax element in a current block by parsing a received bitstream, where the to-be-entropy-decoded syntax element includes a syntax element 1 or a syntax element 2 in the current block, obtaining a context model corresponding to the to-be-entropy-decoded syntax element, where both of a context model corresponding to the syntax element 1 and a context model corresponding to the syntax element 2 are determined from the same preset context model set, entropy decoding the to-be-entropy-decoded syntax element based on the context model corresponding to the to-be-entropy-decoded syntax element, and obtaining a reconstructed image of the current block based on the syntax element obtained by entropy decoding.

公开(公告)号：US11039127B2

公开(公告)日：2021-06-15

申请号：US16786660

申请日：2020-02-10

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Hong Zhang ,  Haitao Yang

IPC: H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/517

Abstract: The present disclosure provides a video image decoding method in which a size of an affine motion compensation image sub-block in an affine image block is determined based on a motion vector difference, motion vector precision, a distance between control points in the affine image block, and a size of the affine image block, where the size includes a length in a horizontal direction and a length in a vertical direction, so that a length of the affine image block in a horizontal/vertical direction is an integer multiple of the length of the affine motion compensation image sub-block in the horizontal/vertical direction.

公开(公告)号：US20210136423A1

公开(公告)日：2021-05-06

申请号：US17150968

申请日：2021-01-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianle Chen ,  Yin Zhao ,  Haitao Yang

IPC: H04N19/96 ,  H04N19/169

Abstract: A video coding mechanism is disclosed. The mechanism includes partitioning an image to create at least one coding tree unit (CTU) with at least one coding tree node. The mechanism further includes determining that the coding tree node height is twice a maximum transform unit (TU) height and the coding tree node width is twice a maximum TU width. The mechanism further includes selecting a split mode for the coding tree node based on the determination. The split mode is selected from a quad-tree split, a horizontal binary-tree split, and no split. The mechanism further includes applying the split mode to the coding tree node to create one or more coding units (CUs). The mechanism further includes encoding the CUs into a bitstream. The mechanism further includes transmitting the bitstream toward a decoder.

公开(公告)号：US20210092433A1

公开(公告)日：2021-03-25

申请号：US17111376

申请日：2020-12-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Yin Zhao ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/189

Abstract: This application provides a motion vector obtaining method and apparatus. The method includes: determining a target offset vector of a block and identifier information of a target picture, wherein the block comprises at least one sub-block; determining a location of the sub-block; determining, as a target location coordinate value of a collocated sub-block, a location coordinate value obtained by performing a clipping operation on an initial location coordinate value in a range, wherein the initial location coordinate value is based on the location of the sub-block and the target offset vector; and obtaining a motion vector of the sub-block based on a motion vector corresponding to the target location coordinate value. Thus, a range of the target offset vector is limited, so that a quantity of memory read times can be reduced in a process of obtaining the motion vector of the collocated sub-block.