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：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.

公开(公告)号：US10911788B2

公开(公告)日：2021-02-02

申请号：US16689550

申请日：2019-11-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yin Zhao ,  Haitao Yang ,  Shan Gao

IPC: H04N19/96 ,  H04N19/147 ,  H04N19/157 ,  H04N19/182 ,  H04N19/70

Abstract: A video image decoding method for parsing split mode information of a coding tree node in a bitstream, obtaining a split mode of the coding tree node from a candidate split mode set of the coding tree node based on the split mode information, parsing the bitstream to obtain coding information of the coding tree node, and reconstructing a pixel value of the coding tree node based on the split mode information and the coding information of the coding tree node.

公开(公告)号：US10834430B2

公开(公告)日：2020-11-10

申请号：US16728287

申请日：2019-12-27

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：US20200252610A1

公开(公告)日：2020-08-06

申请号：US16838948

申请日：2020-04-02

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

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：US20200244976A1

公开(公告)日：2020-07-30

申请号：US16848555

申请日：2020-04-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Shan Liu

IPC: H04N19/196 ,  H04N19/61 ,  H04N19/119 ,  H04N19/70 ,  H04N19/176

Abstract: A video decoding device receives a bitstream including a prediction block and a residual block with coefficients transformed by a Spatial Varying Transform (SVT). The video decoding device determines a type of SVT employed to transform the coefficients in the residual block and determines a position of the SVT relative to the residual block by determining a candidate position step size and a position index for the SVT. The video decoding device applies an inverse transform to the coefficients based on the SVT type and position to create a reconstructed residual block. The video decoding device applies the reconstructed residual block to the prediction block to reconstruct a video block and reconstructs a video sequence for display, the video sequence including a video frame that includes the reconstructed video block.

公开(公告)号：US20200021831A1

公开(公告)日：2020-01-16

申请号：US16584141

申请日：2019-09-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yin Zhao ,  Haitao Yang ,  Shan Gao

IPC: H04N19/44 ,  H04N19/96 ,  H04N19/192 ,  G06F9/30

Abstract: This application relates to video coding/decoding technologies, and discloses an image decoding method, a video decoder, an image encoding method, a video encoder, and a video coding/decoding system. The image decoding method includes: obtaining information about a first leaf node obtained by splitting a coding tree unit serving as a root node; when the information about the first leaf node meets a split condition, obtaining split instruction information of the first leaf node; when the split instruction information of the first leaf node is used to instruct to split the first leaf node, obtaining encoding information corresponding to a second leaf node obtained by splitting the first leaf node serving as a root node; and generating, based on the encoding information corresponding to the second leaf node, a reconstructed image corresponding to the second leaf node.

公开(公告)号：US10412393B2

公开(公告)日：2019-09-10

申请号：US15694440

申请日：2017-09-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bing Zeng ,  Chen Chen ,  Yin Zhao ,  Haitao Yang ,  Shuyuan Zhu

IPC: H04N19/117 ,  H04N19/159 ,  H04N19/122 ,  H04N19/61 ,  H04N19/124 ,  H04N19/105 ,  H04N19/182 ,  H04N19/176 ,  H04N19/593 ,  H04N19/132 ,  H04N19/136 ,  H04N19/18 ,  H04N19/82 ,  H04N19/59

Abstract: An intra-frame encoding method, an intra-frame decoding method, an encoder, and a decoder, where the intra-frame encoding method includes obtaining reference pixel values of a current picture block obtaining a predicted value of a first-type pixel in the current picture block according to the reference pixel values of the current picture block using an intra-frame prediction algorithm, obtaining residual values of the first-type pixel, obtaining transform coefficients according to the residual values of the first-type pixel, quantizing the transform coefficients, reconstructing the first-type pixel according to the quantized transform coefficients and the predicted value of the first-type pixel, and obtaining a reconstructed value of the second-type pixel according to the reconstructed value of the first-type pixel using an interpolation method. Hence, flexible encoding can be implemented, and encoding efficiency can be improved.

公开(公告)号：US10291935B2

公开(公告)日：2019-05-14

申请号：US15645052

申请日：2017-07-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang

IPC: G06K9/62 ,  H04N19/60 ,  H04N19/18 ,  H04N19/182 ,  H04N19/50 ,  H04N19/61 ,  H04N19/136 ,  H04N19/80

Abstract: An image processing method and apparatus includes transforming a first image to obtain a first transform coefficient set; transforming a second image, or transforming a difference image between the first image and a second image, to obtain a second transform coefficient set; selecting a first group of transform coefficients from the first transform coefficient set according to magnitudes of transform coefficients in the first transform coefficient set, where magnitudes of transform coefficients in the first group of transform coefficients meet a preset threshold condition; determining an image difference between the first image and the second image according to the first group of transform coefficients and the second transform coefficient set; and processing the first image and the second image according to the image difference.