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公开(公告)号:US11563976B2
公开(公告)日:2023-01-24
申请号:US17170065
申请日:2021-02-08
Applicant: Huawei Technologies Co., Ltd.
Inventor: Biao Wang , Jianle Chen , Semih Esenlik , Anand Meher Kotra , Han Gao , Zhijie Zhao
IPC: H04N19/593 , H04N19/105 , H04N19/159 , H04N19/176
Abstract: The disclosure relates to a method of decoding implemented by a decoding device, comprising: obtaining a value of a reference line index for a current block; constructing a most probable mode, MPM, list for the current block; obtaining a value of intra-prediction mode index for the current block; when the value of the reference line index is not equal to 0, obtaining an intra prediction mode of the current block according to the MPM list for the current block and the value of the intra-prediction mode index for the current block, wherein the value of the intra-prediction mode index indicates a position that corresponds to the intra prediction mode of the current block among angular intra-prediction modes in the MPM list. The disclosure also relates to a coding apparatus and a non-transitory machine-readable medium.
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公开(公告)号:US11533480B2
公开(公告)日:2022-12-20
申请号:US17015959
申请日:2020-09-09
Applicant: Huawei Technologies Co., Ltd.
Inventor: Semih Esenlik , Zhijie Zhao , Anand Meher Kotra , Jianle Chen
IPC: H04N19/117 , H04N19/157 , H04N19/463 , H04N19/82 , H04N19/42 , H04N19/176
Abstract: An apparatus and a method filters reconstructed images, in particular, video images, with adaptive multiplicative filters. The apparatus and method groups the multiplier coefficients of the filter into at least two groups; determines the value of each multiplier coefficient in a first group so as to be allowed to assume any value in a first set of allowed values of multiplier coefficients, determines the value of each multiplier coefficient in a second group so as to be allowed to assume any value in a second set of allowed values of multiplier coefficients, and filters the set of samples of an image with the filter. At least one of the first and second sets has at least one value that is not in the other set.
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公开(公告)号:US11503290B2
公开(公告)日:2022-11-15
申请号:US17317126
申请日:2021-05-11
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor: Han Gao , Semih Esenlik , Biao Wang , Anand Meher Kotra
IPC: H04N19/119 , H04N19/105 , H04N19/132 , H04N19/176 , H04N19/169 , H04N19/96
Abstract: A method of and an apparatus for encoding and decoding are provided. The method comprises determining whether, as a condition for not applying binary splitting to a current block, determining whether the current block is a boundary block and whether a multi-type tree depth resulting from multi-type tree splitting of a quadtree leaf, is equal to or greater than a sum of a maximum boundary multi-type partition depth and a depth offset. Binary splitting is applied in accordance with a result of determining whether said condition is satisfied.
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公开(公告)号:US11463709B2
公开(公告)日:2022-10-04
申请号:US17141147
申请日:2021-01-04
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor: Han Gao , Semih Esenlik , Biao Wang , Anand Meher Kotra , Jianle Chen
IPC: H04N19/159 , H04N19/105 , H04N19/139 , H04N19/176 , H04N19/96
Abstract: A method of coding implemented by a decoding device, comprising initializing a dedicated buffer for intra block copy (IBC) referencing, when a current coding tree unit (CTU) to be decoded is a first CTU of a CTU row, determining whether a current block in the current CTU is predicted using IBC mode, obtaining an IBC block vector for the current block when the current block is predicted using IBC mode, and obtaining predicted sample values for the current block, based on reference samples from the dedicated buffer and the IBC block vector for the current block.
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公开(公告)号:US20220303573A1
公开(公告)日:2022-09-22
申请号:US17713223
申请日:2022-04-04
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor: Semih Esenlik , Han Gao , Anand Meher Kotra , Biao Wang , Jianle Chen
Abstract: A non-transitory computer-readable medium for inter-prediction and an encoder 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 according to the checking order, and the central search space position is pointed to by the initial motion vector.
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公开(公告)号:US11425375B2
公开(公告)日:2022-08-23
申请号:US17144976
申请日:2021-01-08
Applicant: Huawei Technologies Co., Ltd.
Inventor: Han Gao , Jianle Chen , Semih Esenlik , Zhijie Zhao , Anand Meher Kotra
IPC: H04N19/119 , H04N19/176 , H04N19/192 , H04N19/96
Abstract: A partitioning method comprises determining whether a current block of a picture is a boundary block and whether the size of the current block is larger than a minimum allowed quadtree leaf node size; and if the current block is the boundary block and the size of the current block is not larger than the minimum allowed quadtree leaf node size (MinQTSize), applying forced binary tree (BT) partitioning to the current block. A method comprises making a determination that a current block of a picture is a boundary block and that a size of the current block is less than or equal to a minimum allowed quadtree (QT) leaf node size (MinQTSize); and applying, in response to the determination, forced binary tree (BT) partitioning to the current block.
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公开(公告)号:US11323707B2
公开(公告)日:2022-05-03
申请号:US17107318
申请日:2020-11-30
Applicant: Huawei Technologies Co., Ltd.
Inventor: Han Gao , Zhijie Zhao , Semih Esenlik , Anand Meher Kotra , Jianle Chen
IPC: H04N19/119 , H04N19/176 , H04N19/184 , H04N19/96
Abstract: The present disclosure provides apparatuses and methods for splitting an image into coding units. An image is divided into coding tree units (CTUs) which are hierarchically partitioned. Hierarchical partitioning includes multi-type partitioning such as binary tree or quad tree splitting. For CTUs completely within the image and CTUs on the boundary, respective multi-type partition depths are chosen. The present disclosure provides for multi-type partitioning flexibility in a boundary portion of the image.
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公开(公告)号:US11303902B2
公开(公告)日:2022-04-12
申请号:US17074635
申请日:2020-10-20
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor: Semih Esenlik , Anand Meher Kotra , Zhijie Zhao , Jianle Chen
IPC: H04N19/139 , H04N19/132 , H04N19/152 , H04N19/167 , H04N19/176 , H04N19/96
Abstract: The present disclosure relates to apparatuses and methods for determination of motion parameters (e.g. motion vectors) for motion prediction of a coding block, and is applicable to video encoding and/or decoding. The motion parameter is selected from motion parameters, which include motion parameters associated with a set of respective image samples not included in the coding tree unit, where the set of image samples are located at a predetermined position relative to an extended boundary of the coding tree unit. The apparatuses and methods of the present disclosure may facilitate reducing on-chip buffer requirements for motion prediction.
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公开(公告)号:US11290721B2
公开(公告)日:2022-03-29
申请号:US17033905
申请日:2020-09-27
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor: Anand Meher Kotra , Semih Esenlik , Zhijie Zhao , Han Gao
IPC: H04N19/117 , H04N19/82 , H04N19/132 , H04N19/176
Abstract: A deblocking filter of an image processing device is provided. The deblocking filter is used in an image coding process, for deblocking a block edge between a first coding block and a second coding block of an image. The first block has SA samples perpendicular to the block edge by N samples parallel to the block edge, and the second block has SB samples perpendicular to the block edge by N samples parallel to the block edge. No more than IA samples of the first coding block are used as first filter input values, and no more than IB samples of the second coding block are used as second filter input values. No more than MA samples of the first coding block are modified as first filter output values, and no more than MB samples of the second coding block are modified as second filter output values.
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公开(公告)号:US11272220B2
公开(公告)日:2022-03-08
申请号:US16734018
申请日:2020-01-03
Applicant: Huawei Technologies Co., Ltd.
Inventor: Han Gao , Zhijie Zhao , Semih Esenlik , Anand Meher Kotra , Shan Liu
IPC: H04N19/96 , H04N19/119 , H04N19/176 , H04N19/184 , H04N19/50
Abstract: Embodiments provide an apparatus and method of partitioning of an image or an image slice. In particular, on an image processing apparatus, the image or image slice is split into an integer number of coding tree units in both vertical and horizontal directions. Boundary coding tree units are then at least partially forced-split so that at least one resulting coding unit is a result of binary-tree partitioning, i.e., includes a coding unit which is longer on one side than on the other side. The longer side is parallel or concurrent to the image or image slice boundary. Recursively partitioning coding units that span the picture boundary without the requirement for signaling partition information in a bitstream can be achieved.
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