公开(公告)号：US20210352276A1

公开(公告)日：2021-11-11

申请号：US17376463

申请日：2021-07-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Maxim Borisovitch Sychev ,  Timofey Mikhailovich Solovyev ,  Alexander Alexandrovich Karabutov ,  Sergey Yurievich Ikonin ,  Jianle Chen

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

Abstract: An apparatus and method for inter prediction of a block includes estimating local illumination compensation (LIC) parameters using first reference samples of a current block and second reference samples of a reference block, wherein a third reference sample of the second reference samples is based on an integer part of a fractional motion vector (MV), and obtaining inter prediction of the current block according to the LIC parameters.

公开(公告)号：US20210274216A1

公开(公告)日：2021-09-02

申请号：US17317711

申请日：2021-05-11

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Semih Esenlik ,  Han Gao ,  Anand Meher Kotra ,  Biao Wang ,  Jianle Chen

IPC: H04N19/56 ,  H04N19/57

Abstract: An inter-prediction method and apparatus are provided. An initial motion vector is obtained for a current block. Search space positions are determined according to the initial motion vector. Matching costs for the search space positions are checked according to a checking order to select a target search space position with a minimal matching cost. A refining motion vector of the current block is determined based on the initial motion vector and the target search space position. A central search space position is determined first according to the checking order, and the central search space position is pointed to by the initial motion vector.

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：US20210235127A1

公开(公告)日：2021-07-29

申请号：US17228306

申请日：2021-04-12

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Jianle Chen ,  Anand Meher Kotra ,  Semih Esenlik ,  Biao Wang ,  Han Gao ,  Zhijie Zhao

IPC: H04N19/86 ,  H04N19/82 ,  H04N19/96 ,  H04N19/176 ,  H04N19/186

Abstract: A method and image processing device are provided, including a deblocking filter. The deblocking filter modifies values of at most MA samples of the first image block as first filter output values, the at most MA samples being obtained from a column of the first image block that is perpendicular to and adjacent to the horizontal block edge; and modifies values of at most MB samples of the second image block as second filter output values, the at most MB samples being obtained from a column of the second image block that is perpendicular to and adjacent to the horizontal block edge. At most a number MA of sample values of the first image block adjacent to the block edge are modified and at most a number MB of sample values of the second image block adjacent to the block edge are modified, wherein MA

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：US11044469B2

公开(公告)日：2021-06-22

申请号：US16947840

申请日：2020-08-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Anand Meher Kotra ,  Biao Wang ,  Semih Esenlik ,  Jianle Chen ,  Zhijie Zhao ,  Han Gao

IPC: H04N7/18 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/169

Abstract: A method for constructing a most probable mode (MPM) list for prediction process corresponding to video block is provided. The method includes determining whether a left block of a current coding block is available, in response to determining that the left block of the current coding block is available, adding an intra prediction mode of the left block into an MPM list; determining whether an above block of the current coding block is available, in response to determining that the above block of the current coding block is available, adding an intra prediction mode of the above block into the MPM list; adding an offset to the prediction mode of the left block to obtain a new prediction mode; and adding the above-offset prediction mode into the MPM list when the above-offset prediction mode is not in the MPM list. The MPM list is used to improve coding efficiency.

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：US20210160491A1

公开(公告)日：2021-05-27

申请号：US17144747

申请日：2021-01-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy ,  Jianle Chen

IPC: H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/105 ,  H04N19/59

Abstract: A method, a device, and a computer program product, for aspect-ratio dependent filtering for intra-prediction include obtaining an aspect ratio of a block to be predicted, wherein the aspect ratio is based on a width of the block and a height of the block, and selecting an interpolation filter for the block to be predicted based on the aspect ratio of the block to be predicted.

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.