公开(公告)号：US20240048686A1

公开(公告)日：2024-02-08

申请号：US18365083

申请日：2023-08-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xu CHEN ,  Jianhua ZHENG

IPC: H04N19/105 ,  H04N19/139 ,  H04N19/147 ,  H04N19/172 ,  H04N19/176 ,  H04N19/52

CPC classification number: H04N19/105 ,  H04N19/139 ,  H04N19/147 ,  H04N19/172 ,  H04N19/176 ,  H04N19/52

Abstract: Methods and apparatuses for inter prediction are disclosed. The method comprises: constructing a merging candidate list of a current picture block; when a number of merging candidates in the merging candidate list is less than a maximum number of candidates minus N, adding at least one history-based motion vector predictor (HMVP) candidate to the merging candidate list to obtain a new merging candidate list, wherein N is a positive integer; obtaining motion information of the current picture block based on the new merging candidate list; and determining a predicted block of the current picture block based on the motion information of the current picture block.

公开(公告)号：US20210329251A1

公开(公告)日：2021-10-21

申请号：US17360786

申请日：2021-06-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xu CHEN ,  Jianhua ZHENG

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

Abstract: An inter prediction method and apparatus, and a corresponding encoder and decoder are disclosed. The method includes: obtaining an index value of a length of a motion vector difference of the current picture block; determining target length information from a set of candidate length information based on the index value of the length; obtaining the motion vector difference of the current picture block based on the target length information; determining the motion vector target value of the current picture block based on the motion vector difference of the current picture block and the motion vector predictor of the current picture block; and obtaining a prediction block of the current picture block based on the motion vector target value of the current picture block.

公开(公告)号：US20210014492A1

公开(公告)日：2021-01-14

申请号：US17037192

申请日：2020-09-29

Applicant: Huawei Technologies Co., Ltd. ,  TSINGHUA UNIVERSITY

Inventor： Liqiang WANG ,  Jianhua ZHENG ,  Quanhe YU ,  Yongbing LIN ,  Yun HE

IPC: H04N19/12 ,  H04N19/176 ,  H04N19/167 ,  H04N19/119 ,  H04N19/70

Abstract: The present disclosure provide a transform method in picture block encoding, an inverse transform method in picture block decoding, and an apparatus. The inverse transform method includes: determining, in a target transform set, a corresponding transform pair of each region of at least two regions that constitute a to-be-decoded current block; inverse transforming each region based on the corresponding transform pair of each region to obtain an inverse transform result of each region; and obtaining an inverse transform result of the current block based on the inverse transform result of each region and a position of each region in the current block, where the at least two regions do not overlap each other, the target transform set includes a correspondence between a transform pair and a position of a region in the current block, and the transform pair includes a horizontal transform core and a vertical transform core.

公开(公告)号：US20200344478A1

公开(公告)日：2020-10-29

申请号：US16928632

申请日：2020-07-14

Applicant: Huawei Technologies Co., Ltd. ,  TSINGHUA UNIVERSITY

Inventor： Yunfei WANG ,  Jianhua ZHENG ,  Xiaozhen ZHENG ,  Yun HE

IPC: H04N19/126 ,  H04N19/593 ,  H04N19/463 ,  H04N19/91 ,  H04N19/132 ,  H04N19/167 ,  H04N19/93 ,  H04N19/184

Abstract: Methods and apparatus for coding and decoding a MATRIX. A coding method includes: dividing a MATRIX into layers according to a preset quantity of layers, and grouping MATRIX elements into different layers; performing, according to a determined to-be-coded layer number and in an order of layers one by one, coding processing on MATRIX elements at each layer to be coded; for a layer having a layer number less than or equal to the to-be-coded layer number, writing residual data between an original MATRIX element value corresponding to the layer and a corresponding MATRIX element predicted value into a bit stream; for a layer having a layer number greater than the to-be-coded layer number, writing no coded data of the layer into the bit stream; and coding the to-be-coded layer number and writing the coded layer number of the coded layer into the bit stream.

公开(公告)号：US20170142414A1

公开(公告)日：2017-05-18

申请号：US15418496

申请日：2017-01-27

Applicant: Huawei Technologies Co., Ltd. ,  Tsinghua University

Inventor： Xiaozhen ZHENG ,  Zhen MAO ,  Ziyuan WANG ,  Yun HE ,  Xiaozhong XU ,  Jianhua ZHENG

IPC: H04N19/126 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/126 ,  H04N19/17 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/184 ,  H04N19/436 ,  H04N19/46 ,  H04N19/61 ,  H04N19/70

Abstract: A method and device for coding and decoding are disclosed. The method includes: dividing a picture to be encoded into several slices, each containing macroblocks continuous in a designated scanning sequence in the picture; dividing slices in the picture into one or more slice sets according to attribute information of the slices, each slice set containing one or more slices; and encoding the slices in the slice sets according to slice and slice set division information to get a coded bit stream of the picture. The decoding method includes: obtaining slice and slice set division information from a bit stream to be decoded and decoding the bit stream according to the obtained slice and slice set division information. The invention improves the performance of video transmission effectively and realizes region based coding. The implementation of coding and decoding is simple and the complexity of coding and decoding systems is reduced.

公开(公告)号：US20230379490A1

公开(公告)日：2023-11-23

申请号：US18358700

申请日：2023-07-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xu CHEN ,  Jicheng AN ,  Jianhua ZHENG

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

CPC classification number: H04N19/513 ,  H04N19/105 ,  H04N19/176

Abstract: Embodiments of this application disclose a method for obtaining a motion vector, including: determining a reference block of a to-be-processed block, wherein the reference block and the to-be-processed block have a preset spatial correlation, the reference block is obtained based on a prediction block of the reference block determined by a refined initial motion vector, the refined initial motion vector is obtained based on an initial motion vector and one or more preset motion vector offsets, and the initial motion vector is obtained based on a predicted motion vector of the reference block; and using the initial motion vector as a predicted motion vector of the to-be-processed block.

公开(公告)号：US20210160504A1

公开(公告)日：2021-05-27

申请号：US17164502

申请日：2021-02-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD. ,  TSINGHUA UNIVERSITY

Inventor： Xiaozhen ZHENG ,  Zhen MAO ,  Ziyuan WANG ,  Yun HE ,  Xiaozhong XU ,  Jianhua ZHENG

IPC: H04N19/126 ,  H04N19/70 ,  H04N19/61 ,  H04N19/174 ,  H04N19/17 ,  H04N19/436 ,  H04N19/46

Abstract: A method and device for coding and decoding are disclosed. The method includes: dividing a picture to be encoded into several slices, each containing macroblocks continuous in a designated scanning sequence in the picture; dividing slices in the picture into one or more slice sets according to attribute information of the slices, each slice set containing one or more slices; and encoding the slices in the slice sets according to slice and slice set division information to get a coded bit stream of the picture. The decoding method includes: obtaining slice and slice set division information from a bit stream to be decoded and decoding the bit stream according to the obtained slice and slice set division information. The invention improves the performance of video transmission effectively and realizes region based coding. The implementation of coding and decoding is simple and the complexity of coding and decoding systems is reduced.

公开(公告)号：US20210076036A1

公开(公告)日：2021-03-11

申请号：US17099470

申请日：2020-11-16

Applicant: Huawei Technologies Co., Ltd. ,  Tsinghua University

Inventor： Quanhe YU ,  Jicheng AN ,  Jianhua ZHENG ,  Yongbing LIN ,  Liqiang WANG ,  Benben NIU ,  Ziwei WEI ,  Yun HE

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/46 ,  H04N19/176

Abstract: Embodiments of this application relate to the video coding and compression field, and disclose an encoding method and apparatus, and a decoding method and apparatus, to resolve a problem that an existing split mode cannot satisfy a relatively complex texture requirement. The decoding method specifically includes: parsing a bitstream to determine a basic split mode for a current to-be-decoded picture block and a target derivation mode for a subpicture block of the current to-be-decoded picture block; splitting the current to-be-decoded picture block into N subpicture blocks in the basic split mode, where N is an integer greater than or equal to 2; deriving one derived picture block from at least two adjacent subpicture blocks in the N subpicture blocks in the target derivation mode; and decoding the derived picture block.

公开(公告)号：US20200296422A1

公开(公告)日：2020-09-17

申请号：US16890779

申请日：2020-06-02

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ce ZHU ,  Shichang SONG ,  Yongbing LIN ,  Jianhua ZHENG

IPC: H04N19/645 ,  H04N19/176 ,  H04N19/147 ,  H04N19/44

Abstract: An image encoding and decoding method, includes: determining location information of a target reconstructed image block of a current to-be-encoded image block, where the target reconstructed image block is a reconstructed image block used to determine motion information of the current to-be-encoded image block; determining a first transform core pair based on the location information of the target reconstructed image block; and transforming a residual signal of the current to-be-encoded image block based on the first transform core pair, to obtain a transform coefficient.

公开(公告)号：US20190387254A1

公开(公告)日：2019-12-19

申请号：US16457041

申请日：2019-06-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jicheng AN ,  Jianhua ZHENG

IPC: H04N19/86 ,  H04N19/119 ,  H04N19/186 ,  H04N19/176

Abstract: An image filtering method and apparatus are disclosed. The method includes: obtaining a first index of the luma blocks, wherein the first index represents a filter type applicable to the luma blocks; obtaining a second index of the first chroma blocks, wherein the second index represents a filter type applicable to the first chroma blocks; filtering the luma blocks by applying a first filter in a filter set, the first filter corresponding to the first index; and filtering the first chroma blocks by applying a second filter in the filter set, the second filer corresponding to the second index.