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.

公开(公告)号：US11245916B2

公开(公告)日：2022-02-08

申请号：US16844677

申请日：2020-04-09

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/513 ,  H04N19/533 ,  H04N19/573

Abstract: The present disclosure relates to means to enable reduction of memory access in motion vector determination and/or refinement for a prediction block. In particular, the present disclosure relates to means to enable reduction of memory access in motion vector determination and/or refinement performed on a sub prediction block basis. In other words, a prediction block is split into sub prediction blocks for which at least the motion vector refinement is performed individually. The memory access window which limits the samples accessible during the motion vector determination and refinement of the sub prediction blocks does not exceed the memory access window for performing the motion vector determination and/or refinement for the prediction block.

公开(公告)号：US11196991B2

公开(公告)日：2021-12-07

申请号：US16899313

申请日：2020-06-11

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: A method of coding implemented by a coding apparatus. The method includes selecting an intra prediction mode for a current block, and encoding the selected intra prediction mode using truncated binary coding when the selected intra prediction mode is a remaining mode.

公开(公告)号：US20210344920A1

公开(公告)日：2021-11-04

申请号：US17370805

申请日：2021-07-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/122 ,  H04N19/61 ,  H04N19/625 ,  H04N19/196 ,  H04N19/159 ,  H04N19/176

Abstract: A method of video coding a block of a picture includes: obtaining a residual signal resulting from inter- or intra-picture prediction; inferring use of a DCT2 transform core for a sequence of the residual signal; processing the transformation of the block using the inferred transform core.

公开(公告)号：US11159820B2

公开(公告)日：2021-10-26

申请号：US16843707

申请日：2020-04-08

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/57 ,  H04N19/52 ,  H04N19/56 ,  H04N19/533 ,  H04N19/573

Abstract: A motion vector determination employs template matching. At first, an initial motion vector is obtained. If the initial motion vector points to a position that is fractional, and thus, requires interpolation from the integer sample positions, the initial motion vector is rounded to a closest integer sample position. The rounded position is then used to define the search space for the template matching to define a refinement of the initial motion vector.

公开(公告)号：US11070799B2

公开(公告)日：2021-07-20

申请号：US17011504

申请日：2020-09-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/11 ,  H04N19/167 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593 ,  H04N19/105 ,  H04N19/13 ,  H04N19/159 ,  H04N19/186

Abstract: Devices and methods for Intra prediction are provided. The method includes: obtaining a value of a first indication information of a current block and a value of a reference index line of the current block. When the value of the first indication information indicates the intra prediction mode of the current block is comprised in the set of most probable modes, and when the value of the reference index line indicates the closest neighboring reference line to the current block is used, the method further includes obtaining a value of a second indication information of the current block, the value of the second indication information of the current block indicating whether the intra prediction mode of the current block is Planar mode or not. The method can improve the efficiency to determine the intra prediction mode of the current block.

公开(公告)号：US20210211665A1

公开(公告)日：2021-07-08

申请号：US17204136

申请日：2021-03-17

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/119 ,  H04N19/96 ,  H04N19/169 ,  H04N19/176

Abstract: A method of image partitioning, comprises determining a first indicator, wherein the first indicator is shared by a first part of a bitstream; determining a partitioning of an image area corresponding to the first part of the bitstream with binary tree (BT) splitting or ternary tree (TT) splitting when the first indicator takes a first value; and determining the partitioning of the image area corresponding to the first part of the bitstream without BT splitting and TT splitting when the first indicator takes a second value, wherein the first value is different from the second value.

公开(公告)号：US20210203927A1

公开(公告)日：2021-07-01

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

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：US20210127139A1

公开(公告)日：2021-04-29

申请号：US17134442

申请日：2020-12-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/86 ,  H04N19/124

Abstract: An in-loop deblocking filter apparatus (120) for processing a current row or column of samples into a filtered row or column of samples. The current row or column of samples comprises a plurality of samples from a first sample block and a horizontally or vertically neighboring second sample block of a reconstructed picture of a video stream. The samples of the current row or column of samples have sample values pN−1−p0, q0−qN−1 wherein N is an even integer greater than 2. If a first condition or a second condition is satisfied, the current row or column is processed by: determining a filtered sample value q0′ by applying a (2N−1)-tap filter to the sample values pN−2, . . . , p0, q0, . . . , qN−1 of the current row or column; and/or determining a filtered sample value p0′ by applying a (2N−1)-tap filter to the sample values pN−1, . . . , p0, q0, . . . , qN−2 of the current row or column.