公开(公告)号：US20230239489A1

公开(公告)日：2023-07-27

申请号：US18158313

申请日：2023-01-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Semih Esenlik ,  Anand Meher Kotra ,  Zhijie Zhao ,  Han Gao

IPC: H04N19/513 ,  H04N19/57

CPC classification number: H04N19/513 ,  H04N19/57

Abstract: The present disclosure relates to motion vector refinement. As a first step, an initial motion vector and a template for the block are obtained. Then, the refinement of the initial motion vector is determined by template matching with said template in a search space. The search space is located on a position given by the initial motion vector and includes one or more fractional sample positions, wherein each of the fractional sample positions belonging to the search space is obtained by interpolation filtering with a filter of a predefined tap-size assessing integer samples only within a window, said window being formed by integer samples accessible for the template matching in said search space.

公开(公告)号：US11647182B2

公开(公告)日：2023-05-09

申请号：US17199929

申请日：2021-03-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/436 ,  H04N19/593 ,  H04N19/70

CPC classification number: H04N19/11 ,  H04N19/176 ,  H04N19/436 ,  H04N19/593 ,  H04N19/70

Abstract: A decoding method and a decoder for decoding a current block of a video frame is provided, wherein the decoding method comprises determining a list of Most Probable Modes (MPMs) for the current block. When at least one condition is satisfied, the list of MPMs includes a DC mode, a Vertical mode, a Horizontal mode, an intra prediction mode corresponding to a value of the Vertical mode with a first offset, and an intra prediction mode corresponding to the value of the Vertical mode with a second offset. The decoding method further includes obtaining a MPM flag and a MPM index for the current block from a bitstream of the video, and obtaining an intra prediction mode for the current block for reconstructing the current block.

公开(公告)号：US11641466B2

公开(公告)日：2023-05-02

申请号：US17190231

申请日：2021-03-02

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/70 ,  H04N19/96

Abstract: The present disclosure relates to methods and devices to be employed for encoding and decoding of image or video signal. They include determination of whether or not the size of a current block is larger than a minimum allowed quadtree leaf node size. If the size of the current block is not larger than the minimum allowed quadtree leaf node size, multi-type tree splitting is applied to the current block. The minimum allowed quadtree leaf node size is not larger than a maximum allowed binary tree root node size or the minimum allowed quadtree leaf node size is not larger than a maximum allowed ternary tree root node size.

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.

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.

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.

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.

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.

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.

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.