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.

公开(公告)号：US20210168356A1

公开(公告)日：2021-06-03

申请号：US17167072

申请日：2021-02-03

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Lu Yu ,  Xuguang Zuo ,  Yin Zhao ,  Haitao Yang

IPC: H04N19/105 ,  H04N19/503 ,  H04N19/142 ,  H04N19/172 ,  H04N19/58 ,  H04N19/159 ,  H04N19/184

Abstract: A picture encoding/decoding method and a related apparatus are provided. The picture decoding method includes obtaining a current picture; selecting, from a knowledge base, K reference pictures of the current picture, where at least one picture in the knowledge base does not belong to a random access segment in which the current picture is located and wherein K is an integer greater than or equal to 1; and decoding the current picture according to the K reference pictures.

公开(公告)号：US10917638B2

公开(公告)日：2021-02-09

申请号：US15711555

申请日：2017-09-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Lu Yu ,  Xuguang Zuo ,  Yin Zhao ,  Haitao Yang

IPC: H04N19/105 ,  H04N19/503 ,  H04N19/142 ,  H04N19/172 ,  H04N19/58 ,  H04N19/159 ,  H04N19/184 ,  H04N19/23 ,  H04N19/87 ,  G06K9/00 ,  G06K9/46

Abstract: A picture encoding/decoding method and a related apparatus are provided. The picture decoding method includes obtaining a current picture; selecting, from a knowledge base, K reference pictures of the current picture, where at least one picture in the knowledge base does not belong to a random access segment in which the current picture is located and wherein K is an integer greater than or equal to 1; and decoding the current picture according to the K reference pictures.

公开(公告)号：US10805628B2

公开(公告)日：2020-10-13

申请号：US16440941

申请日：2019-06-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang Ma ,  Haitao Yang

IPC: H04N19/137 ,  H04N19/513 ,  H04N19/176 ,  H04N19/61 ,  H04N19/52

Abstract: A motion vector decoding method includes: determining a prediction motion vector of a to-be-decoded unit based on a motion vector of a prediction unit of the to-be-decoded unit; when a face image in which the to-be-decoded unit is located and at least one of a face image in which a first reference unit is located and a face image in which the prediction unit is located are not face images in a same orientation, performing a first update on the prediction motion vector, where the first update is used to determine a mapping vector that is of the prediction motion vector and that is in a plane of the face image in which the to-be-decoded unit is located; and obtaining a motion vector of the to-be-decoded unit based on the prediction motion vector obtained after the first update.

公开(公告)号：US10805606B2

公开(公告)日：2020-10-13

申请号：US16234107

申请日：2018-12-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiang Ma ,  Haitao Yang

IPC: H04N19/105 ,  H04N19/597 ,  H04N19/70 ,  H04N19/167 ,  H04N19/176

Abstract: A decoding method applied to the field of video processing, where the decoding method includes receiving an encoded bitstream of a two-dimensional panorama picture, determining an applicable spatial layout format of the two-dimensional panorama picture, parsing the encoded bitstream of the two-dimensional panorama picture to determine whether a spatial position relationship between sub-pictures in the two-dimensional panorama picture in the applicable spatial layout format is a default spatial position relationship, and decoding the encoded bitstream of the two-dimensional panorama picture based on the applicable spatial layout format and the default spatial position relationship when the spatial position relationship between the sub-pictures in the two-dimensional panorama picture in the applicable spatial layout format is the default spatial position relationship.

公开(公告)号：US20200304816A1

公开(公告)日：2020-09-24

申请号：US16849302

申请日：2020-04-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/44 ,  H04N19/12 ,  H04N19/61 ,  H04N19/625 ,  H04N19/176

Abstract: The present disclosure discloses a video decoding method, including: parsing a received bitstream to obtain prediction information of a CU; obtaining a target transform mode of a residual TU; parsing the received bitstream to obtain transform coefficients of the residual TU; applying an inverse quantization to the transform coefficients of the residual TU to obtain dequantized coefficients; applying, based on the target transform mode, an inverse transform to the dequantized coefficients to obtain a residual block of the residual TU; obtaining a prediction block of the CU based on the prediction information; and obtaining a video block based on the residual block and the prediction block; and outputting a video sequence, the video sequence including a video frame that includes the video block.

公开(公告)号：US10708581B2

公开(公告)日：2020-07-07

申请号：US15071269

申请日：2016-03-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Changquan Ai ,  Shaobo Zhang ,  Haitao Yang

IPC: H04N19/105 ,  H04N19/23 ,  H04N19/70 ,  H04N19/46 ,  H04N19/172 ,  H04N19/44 ,  H04N19/107

Abstract: A video frame decoding method and apparatus in order to implement efficient and fast video decoding. The method includes acquiring a target time point of a video, obtaining a frame number of a corresponding random access frame according to the target time point, obtaining a frame number of a frame that can be independently decoded, where the dependency set includes at least one dependency, and the dependency represents a correspondence between a frame number of a random access frame and a frame number of a frame that can be independently decoded, and obtaining, according to the frame number of the frame that can be independently decoded, video data of the frame that can be independently decoded, and decoding the random access frame.

公开(公告)号：US20200213616A1

公开(公告)日：2020-07-02

申请号：US16815914

申请日：2020-03-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shan Gao ,  Huanbang Chen ,  Haitao Yang ,  Jiantong Zhou ,  Shan Liu ,  Sriram Sethuraman ,  Jay Shingala ,  Jeeva Raj A. ,  Sagar Kotecha

IPC: H04N19/56 ,  H04N19/523 ,  H04N19/176

Abstract: An image prediction method and apparatus includes obtaining predicted motion information of an image block; determining an initial predicted block of the image block according to the predicted motion information and a reference image of the image block; performing, according to the predicted motion information, L iterative searches in the reference image using an integer pixel step size to obtain an intermediate predicted block of the image block; performing a single search in the reference image using a fractional pixel step size to obtain M predicted blocks of the image block; determining a target predicted block of the image block according to the M predicted blocks and the intermediate predicted block; and obtaining a predicted value of a pixel value of the image block according to a pixel value of the target predicted block.

公开(公告)号：US20200137424A1

公开(公告)日：2020-04-30

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.