公开(公告)号：US20220232260A1

公开(公告)日：2022-07-21

申请号：US17714318

申请日：2022-04-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang MA ,  Haitao YANG

IPC: H04N19/70 ,  H04N19/31 ,  H04N19/187 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172

Abstract: A method of decoding a coded video bitstream is provided, the method comprising: obtaining, from the coded video bitstream, a first syntax element specifying whether the first layer use inter-layer prediction; obtaining, from the coded video bitstream, one or more second syntax elements related to one or more second layers, each second syntax element specifies whether a second layer is a direct reference layer for the first layer; wherein at least one second syntax element of the one or more second syntax elements has a value specifying a second layer is a direct reference layer for the first layer, in case that the value of the first syntax element specifies the first layer is allowed to use inter-layer prediction; performing inter-layer prediction for a picture of the first layer by using a picture of the second layer related to the at least one second syntax element as a reference picture.

公开(公告)号：US20220124377A1

公开(公告)日：2022-04-21

申请号：US17646707

申请日：2021-12-31

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：US20210360275A1

公开(公告)日：2021-11-18

申请号：US17389873

申请日：2021-07-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Haitao YANG ,  Fan MU ,  Xiang MA ,  Huanbang CHEN ,  Lian ZHANG

IPC: H04N19/51 ,  H04N19/159 ,  H04N19/132 ,  H04N19/105 ,  H04N19/176

Abstract: The inter prediction method is provided, which includes: obtaining a predicted sample value of a current affine block; determining one or more luminance compensation blocks based on motion vectors of one or more subblocks of the current affine block; determining a linear model coefficient based on a first sample set and a second sample set, where the first sample set includes at least one reconstructed sample neighboring to an edge of the current affine block, the second sample set includes at least one reconstructed sample neighboring to an edge of the one or more luminance compensation blocks, and the sample in the first sample set is in a one-to-one correspondence with the sample in the second sample set; and updating the predicted sample value of the current affine block based on the linear model coefficient, to obtain an updated predicted sample value of the current affine block.

公开(公告)号：US20210344899A1

公开(公告)日：2021-11-04

申请号：US17374004

申请日：2021-07-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang CHEN ,  Yin ZHAO ,  Haitao YANG ,  Lian ZHANG

IPC: H04N19/103 ,  H04N19/50 ,  H04N19/96

Abstract: This application discloses a processing method applied to video encoding or video decoding. The method includes: obtaining size information of a current block; determining a context model index ctxInc of a flag of the current block based on the obtained size information of the current block and a size-based constraint; and performing subsequent processing based on the context model index ctxInc of the flag of the current block. The method can be used to improve coding efficiency.

公开(公告)号：US20210337189A1

公开(公告)日：2021-10-28

申请号：US17369703

申请日：2021-07-07

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin ZHAO ,  Haitao YANG ,  Lian ZHANG

IPC: H04N19/107 ,  H04N19/96 ,  H04N19/61 ,  H04N19/70 ,  H04N19/124

Abstract: A prediction mode determining method and apparatus are described. A prediction mode status of a child node of a target node is determined based on an area and a split manner of the target node, where the prediction mode status includes intra prediction mode only and inter prediction mode only. Further, a prediction mode of the child node is determined based on the prediction mode status of the child node. In this way, a same prediction mode is used for all child nodes obtained by splitting the target node. This facilitates pipeline processing of hardware, increases a subsequent processing speed, and improves video coding efficiency.

公开(公告)号：US20210329289A1

公开(公告)日：2021-10-21

申请号：US17357555

申请日：2021-06-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang CHEN ,  Haitao YANG ,  Lian ZHANG

IPC: H04N19/53 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/523

Abstract: An inter prediction method is provided, including: when a prediction mode of a to-be-processed picture block is an affine motion model-based advanced motion vector prediction mode (S901), obtaining control point motion vectors of the to-be-processed picture block (S902), where the control point motion vectors meet preset first motion vector resolution and/or first motion vector bit depth; then, deriving a motion vector of each motion compensation unit in the to-be-processed picture block based on the control point motion vectors (S903); and obtaining a reconstructed block of the to-be-processed picture block based on the motion vector of each motion compensation unit (S904).

公开(公告)号：US20210314581A1

公开(公告)日：2021-10-07

申请号：US17303976

申请日：2021-06-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang MA ,  Jianle CHEN ,  Haitao YANG

IPC: H04N19/196 ,  H04N19/176 ,  H04N19/186 ,  H04N19/132 ,  H04N19/159 ,  H04N19/593

Abstract: This application provides a chroma block prediction method and apparatus. The method includes: obtaining a maximum luma value and a minimum luma value based on luma samples corresponding to neighboring samples of a target chroma block, and calculating a first difference between the maximum luma value and the minimum luma value; if the first difference is not equal to 0, processing the first difference based on a quantity of significant bits of the first difference and a first preset bit depth to obtain a second difference; and determining, based on a first chroma value, a second chroma value, and the second difference, an intra prediction model parameter corresponding to the target chroma block, and determining prediction information of the target chroma block based on the intra prediction model parameter and luma reconstruction information corresponding to the target chroma block.

公开(公告)号：US20210289224A1

公开(公告)日：2021-09-16

申请号：US17337556

申请日：2021-06-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Haitao YANG ,  Fan MU ,  Lian ZHANG ,  Xiang MA

IPC: H04N19/51 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184

Abstract: This application provides an inter prediction method and a related apparatus. The method includes: parsing a bitstream to determine prediction information of a to-be-processed picture block, where when the prediction information indicates that a prediction direction of the to-be-processed picture block is bidirectional prediction, the bitstream does not include target identification information, where the target identification information is used to indicate to perform local illumination compensation LIC on the to-be-processed picture block; and obtaining a prediction value of the to-be-processed picture block based on the prediction information. According to the foregoing technical solutions, a video decoding speed can be accelerated without greatly affecting video quality.

公开(公告)号：US20210289214A1

公开(公告)日：2021-09-16

申请号：US17217808

申请日：2021-03-30

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

Inventor： Feng WU ,  Fangdong CHEN ,  Houqiang LI ,  Zhuoyi LV ,  Haitao YANG

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

Abstract: The present disclosure provides a reference image encoding method, 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.

公开(公告)号：US20210203975A1

公开(公告)日：2021-07-01

申请号：US17185039

申请日：2021-02-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang CHEN ,  Xiang MA ,  Haitao YANG ,  Jianle CHEN

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/159 ,  H04N19/46 ,  H04N19/176

Abstract: This application provides a video picture prediction method and apparatus, to resolve a problem in a conventional technology that a length of a coded video sequence is increased. The first type of identifier may be added to a bitstream. The first type of identifier is used to indicate whether an affine motion model-based inter prediction mode is enabled for a video picture. For a video picture or a picture block included in the slice for which the affine motion model does not need to be used, a parameter, related to the affine motion model, of the picture block may not need to be transmitted. On a decoder side, during decoding of the picture block, the parameter related to the affine motion model does not need to be parsed. This can reduce load of a decoder, increase a processing speed, and decrease a processing time.