公开(公告)号：US11303888B2

公开(公告)日：2022-04-12

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 ,  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：US20210337220A1

公开(公告)日：2021-10-28

申请号：US17366735

申请日：2021-07-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lu Yu ,  Ye-Kui Wang ,  Yuqun Fan ,  Hualong Yu ,  Yin Zhao ,  Xiangyu Lin ,  Haitao Yang

IPC: H04N19/184 ,  H04N19/172 ,  H04N19/136

Abstract: A decoding method includes obtaining an identifier from a bitstream, where the identifier indicates a minimum decoding time interval k between library pictures that is allowed in the bitstream, obtaining, when parsing the bitstream, a decoding moment ti of a current decoded picture and a decoding moment tj of a first decoded picture that is closest to the current decoded picture and that references a new library picture when the current decoded picture is decoded by referencing a library picture, where the new library picture is a library picture that is not decoded or needs to be re-decoded when the first decoded picture is decoded, and determining a preset quantity of library pictures as candidate reference pictures of the current decoded picture based on a relationship between k and a difference between ti and tj.

公开(公告)号：US11109026B2

公开(公告)日：2021-08-31

申请号：US17072865

申请日：2020-10-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen ,  Jiali Fu

IPC: H04N19/119 ,  H04N19/132 ,  H04N19/96 ,  H04N19/159 ,  H04N19/46 ,  H04N19/186 ,  H04N19/169

Abstract: A video coding mechanism is disclosed. The mechanism includes obtaining a coding tree unit including luma samples and chroma samples. The mechanism partitions the luma samples and the chroma samples according to a common coding tree when a size of a first coding tree node exceeds a threshold. The mechanism also partitions the luma samples with a luma coding sub-tree when a size of a second coding tree node is equal to or less than the threshold. The mechanism also chroma samples with a chroma coding sub-tree when a size of a third coding tree node is equal to or less than the threshold. The luma coding sub-tree contains a different set of split modes than the chroma coding sub-tree.

公开(公告)号：US20210243462A1

公开(公告)日：2021-08-05

申请号：US17227821

申请日：2021-04-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/44 ,  H04N19/12 ,  H04N19/176 ,  H04N19/61 ,  H04N19/625 ,  H04N19/124 ,  H04N19/184 ,  H04N19/51

Abstract: A video decoding method, including: parsing a received bitstream to obtain prediction information of a coding unit (CU); obtaining a target transform mode of a residual transform unit (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; obtaining a video block based on the residual block and the prediction block; and outputting a video sequence including a video frame that includes the video block.

公开(公告)号：US20210211715A1

公开(公告)日：2021-07-08

申请号：US17209962

申请日：2021-03-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/513 ,  H04N19/52

Abstract: Embodiments of this application disclose a picture prediction method and apparatus, and a corresponding encoder and decoder. A prediction direction of a current picture block is considered when a size of a subblock in the current picture block is determined. For example, if a prediction mode of the current picture block is unidirectional prediction, the size of the subblock is 4×4; or if a prediction mode of the current picture block is bidirectional prediction, the size of the subblock is 8×8.

公开(公告)号：US20210185310A1

公开(公告)日：2021-06-17

申请号：US17189577

申请日：2021-03-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Haitao Yang

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/172

Abstract: Embodiments of this application relate to the field of video picture coding technologies, and disclose a reference frame obtaining method and apparatus applied to bidirectional inter prediction, to improve coding efficiency. The method includes: determining a first reference frame list and a second reference frame list of a current picture block; determining, from the first reference frame list, whether an X-directional reference frame x1 satisfying a condition A1 exists; determining, from the second reference frame list, whether a Y-directional reference frame y1 satisfying a condition B1 exists; and in response to determining that the X-directional reference frame x1 exists and determining that the Y-directional reference frame y1 exists, obtaining index values (R1, R2) of bidirectional reference frames of the current picture block.

公开(公告)号：US20210168355A1

公开(公告)日：2021-06-03

申请号：US17139837

申请日：2020-12-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen ,  Weiwei Xu ,  Ting Fu ,  Jiali Fu

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/132 ,  H04N19/119 ,  H04N19/70 ,  H04N19/176

Abstract: Technologies for inter prediction for a block in a video are provided. In one example, a method includes: parsing a bitstream to obtain a syntax element, where the syntax element includes at least an index of optimal candidate motion information of a current block; determining, based on the syntax element, to construct a first list or a second list for the current block, where the first list is a block-based candidate motion information list, and the second list is a subblock-based candidate motion information list; determining optimal motion information from the first list or the second list based on the index; and predicting the current block based on the optimal motion information. In this method, the block-based candidate motion information list and the subblock-based candidate motion information list are distinguished from each other. This effectively reduces transmission costs of the optimal candidate motion information.

公开(公告)号：US20210136404A1

公开(公告)日：2021-05-06

申请号：US17146349

申请日：2021-01-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/50

Abstract: A video encoder, a video decoder, and a corresponding method are provided. The method includes: parsing a bitstream to obtain an index, where the index indicates a target candidate motion vector group of a current coding block; determining the target candidate motion vector group in an affine candidate motion vector list based on the index, where the affine candidate motion vector list includes at least a first candidate motion vector group, the first candidate motion vector group is obtained based on a first group of control points of a first neighboring affine coding block, and the first group of control points is determined based on a CTU located relative to the current coding block, wherein the first neighboring affine coding block is located in the CTU; and predicting a predicted sample value of the current coding block based on the target candidate motion vector group.

公开(公告)号：US20210136392A1

公开(公告)日：2021-05-06

申请号：US17149726

申请日：2021-01-15

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

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

IPC: H04N19/186 ,  H04N19/176

Abstract: Techniques are described of a linear model prediction mode. A set of reconstructed neighboring luma samples are determined. Two pairs of luma value and chroma value are determined according to N reconstructed neighboring luma samples, N reconstructed neighboring chroma samples, M reconstructed neighboring luma samples, and M reconstructed neighboring chroma samples. The minimum value of the N reconstructed neighboring luma samples is not less than the maximum luma value of the remaining reconstructed neighboring luma samples of the set of reconstructed neighboring luma samples. The maximum value of the M reconstructed neighboring luma samples is not larger than the minimum luma value of the remaining reconstructed neighboring luma samples of the set of reconstructed neighboring luma samples. M>1 and N>1. Linear model parameters are determined based on the two pairs of luma value and chroma value, and a predictive block is determined based on the linear model parameters.

公开(公告)号：US10979722B2

公开(公告)日：2021-04-13

申请号：US15861218

申请日：2018-01-03

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

Inventor： Feng Wu ,  Fangdong Chen ,  Houqiang Li ,  Zhuoyi Lv ,  Haitao Yang

IPC: H04N19/573 ,  H04N19/176 ,  H04N19/46 ,  H04N19/58 ,  H04N19/179 ,  H04N19/55 ,  H04N19/61 ,  H04N19/91

Abstract: A reference image encoding method is provided, including: encoding sequence, to obtain a reconstructed image of a first and second reference images; determining whether a local area in the second reference image is suitable for updating first reference image; determining whether the first reference image is updated; when the first reference image is not updated, and it is determined the second reference image is suitable for updating the first reference image, replacing a pixel value of a corresponding area or a related area in the first reference image with a pixel value of the local area in the second reference image; and compiling, into the bitstream.