公开(公告)号：US20220174279A1

公开(公告)日：2022-06-02

申请号：US17673512

申请日：2022-02-16

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

Inventor： Changcai LAI ,  Xiaoran CAO ,  Yongbing LIN ,  Lingzhi LIU ,  Yun HE

IPC: H04N19/119 ,  H04N19/147 ,  H04N19/124 ,  H04N19/172

Abstract: An decoding method is disclosed, including: parsing a bitstream to obtain a first flag, wherein the first flag specifies whether a current coding block is required to be partitioned; when the first flag specifies that the current coding block is required to be partitioned, parsing the bitstream to obtain a second flag, wherein the second flag specifies whether the current coding blocks is partitioned in a horizontal direction or a vertical direction; partitioning the current coding block into four first rectangular subblocks in the horizontal direction or four second rectangular subblocks in the vertical direction; and reconstructing the current coding block based on the four first rectangular subblocks or the four second rectangular subblocks.

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：US20160381375A1

公开(公告)日：2016-12-29

申请号：US15261437

申请日：2016-09-09

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

Inventor： Xiaoran CAO ,  Yun HE ,  Xiaozhen ZHENG ,  Jianhua ZHENG

IPC: H04N19/517 ,  H04N19/176 ,  H04N19/172 ,  H04N19/48

CPC classification number: H04N19/517 ,  H04N19/12 ,  H04N19/147 ,  H04N19/172 ,  H04N19/176 ,  H04N19/463 ,  H04N19/48

Abstract: The present application discloses an image coding/decoding method, device, and system, where an encoder performs singular vector decomposition on a prediction block corresponding to a to-be-coded image block, to obtain eigenvector matrices U and V of the prediction block; and performs coding processing on residual data according to the eigenvector matrices U and V of the prediction block, where the residual data is a difference between a pixel value of the to-be-coded image block and a pixel value of the corresponding prediction block. This can reduce identifier load of a coded bit stream.

Abstract translation: 本申请公开了一种图像编码/解码方法，装置和系统，其中编码器对与待编码的图像块相对应的预测块执行奇异矢量分解，以获得预测块的特征向量矩阵U和V; 并且根据预测块的特征向量矩阵U和V对剩余数据执行编码处理，其中残留数据是要编码的图像块的像素值与相应的预测块的像素值之间的差。 这可以减少编码比特流的标识符负载。

公开(公告)号：US20160219308A1

公开(公告)日：2016-07-28

申请号：US15091378

申请日：2016-04-05

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

Inventor： Xiaozhen ZHENG ,  Yuan YUAN ,  Jianhua ZHENG ,  Yun HE

IPC: H04N19/85 ,  H04N19/176 ,  H04N19/61 ,  H04N19/122

CPC classification number: H04N19/85 ,  H04N19/122 ,  H04N19/176 ,  H04N19/60 ,  H04N19/61 ,  H04N19/96

Abstract: The present disclosure provides a method for obtaining a size of a transform block, where the method includes: obtaining a dividing manner of an image block; and obtaining size information of a post-dividing transform block according to the dividing manner of the image block and a width and a height of a pre-dividing transform block. By using the method for obtaining a size of a transform block provided in this embodiment of the present disclosure, a size of a transform block may be coded according to a dividing manner of an image block or a height and a width of a pre-dividing transform block, thereby effectively improving coding efficiency.

Abstract translation: 本公开提供了一种用于获得变换块的大小的方法，其中该方法包括：获得图像块的分割方式; 以及根据图像块的分割方式和预分割变换块的宽度和高度来获得后分割变换块的大小信息。 通过使用用于获得本公开的本实施例中提供的变换块的大小的方法，可以根据图像块的分割方式或预分割的高度和宽度对变换块的大小进行编码 转换块，从而有效提高编码效率。

公开(公告)号：US20140241427A1

公开(公告)日：2014-08-28

申请号：US14273149

申请日：2014-05-08

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

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

IPC: H04N19/126 ,  H04N19/132 ,  H04N19/169 ,  H04N19/187 ,  H04N19/176

CPC classification number: H04N19/126 ,  H04N19/132 ,  H04N19/167 ,  H04N19/184 ,  H04N19/30 ,  H04N19/463 ,  H04N19/593 ,  H04N19/70 ,  H04N19/91 ,  H04N19/93

Abstract: The present disclosure provides a method and an apparatus for coding or decoding a matrix, includes: dividing a matrix into layers according to a preset quantity of divided layers, and grouping matrix elements into different layers; performing, according to a determined layer number of a highest layer to be coded 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 layer number of the highest layer to be coded, 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 layer number of the highest layer to be coded, writing no coded data of the layer into the bit stream.

Abstract translation: 本公开提供了一种用于对矩阵进行编码或解码的方法和装置，包括：根据预设的分割层数将矩阵划分成层，并将矩阵元素分组成不同的层; 根据要编码的最高层的确定层号和逐层的顺序执行对要编码的每层的矩阵元素的编码处理; 对于具有小于或等于要编码的最高层的层号的层号的层，将与该层对应的原始矩阵元素值与相应的矩阵元素预测值之间的残差数据写入比特流; 对于具有大于要编码的最高层的层编号的层数的层，将该层的编码数据写入比特流。

公开(公告)号：US20140177713A1

公开(公告)日：2014-06-26

申请号：US14141201

申请日：2013-12-26

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

Inventor： Yuan YUAN ,  Xiaozhen ZHENG ,  Yun HE

IPC: H04N19/61 ,  H04N19/44

CPC classification number: H04N19/119 ,  H04N19/122 ,  H04N19/176 ,  H04N19/60 ,  H04N19/61 ,  H04N19/96

Abstract: Embodiments of the present invention provide a method and a device for determining a transform block size, and can improve image compression efficiency. The method includes: obtaining, according to image block information and a splitting manner of an image block, a parameter of a transform block corresponding to the image block; and obtaining a transform block size according to the parameter of the transform block and the splitting manner of the image block. In the embodiments of the present invention, during determination of a transform block size, the transform block size is obtained according to a splitting manner of an image block and a parameter of a transform block corresponding to the image block. Therefore, a transform block matching the splitting manner of the image block can be used, improving image compression efficiency.

Abstract translation: 本发明的实施例提供了一种用于确定变换块大小的方法和装置，并且可以提高图像压缩效率。 该方法包括：根据图像块信息和图像块的分割方式获得与该图像块相对应的变换块的参数; 并根据变换块的参数和图像块的分割方式获得变换块大小。 在本发明的实施例中，在确定变换块大小期间，根据图像块的分割方式和对应于图像块的变换块的参数获得变换块大小。 因此，可以使用与图像块的分割方式匹配的变换块，提高图像压缩效率。

公开(公告)号：US20210235084A1

公开(公告)日：2021-07-29

申请号：US17231825

申请日：2021-04-15

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

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

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/146 ,  H04N19/176

Abstract: This application provides a picture block splitting method and an apparatus. The picture block splitting method in this application includes: obtaining a picture block in a to-be-processed picture, where the picture block is an object on which encoding is performed; determining, based on a length of a first side and a length of a second side of the picture block, a block splitting method used for the picture block, where the first side and the second side are two neighboring sides of the picture block, the first side is a horizontal line, and the second side is a vertical line; and splitting the picture block according to the block splitting method. In this application, an unnecessary block splitting method is omitted, operation overheads are reduced, and picture encoding efficiency is improved.

公开(公告)号：US20170347105A1

公开(公告)日：2017-11-30

申请号：US15677976

申请日：2017-08-15

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

Inventor： Jianhua ZHENG ,  Jianwen CHEN ,  Yun HE ,  Xinjian MENG

IPC: H04N19/174 ,  H04N19/61 ,  H04N19/46 ,  H04N19/18 ,  H04N19/177 ,  H04N19/176 ,  H04N19/154 ,  H04N19/70 ,  H04N19/126

CPC classification number: H04N19/174 ,  H04N19/126 ,  H04N19/154 ,  H04N19/176 ,  H04N19/177 ,  H04N19/18 ,  H04N19/46 ,  H04N19/61 ,  H04N19/70

Abstract: A method and apparatus is provided for encoding image data comprising receiving image data and an initial quantization matrix for encoding the image data; converting the initial quantization matrix into a modified scaling matrix, wherein the modified scaling matrix has a plurality of coefficients divided into different frequency bands; adjusting a value corresponding to at least one of the plurality of coefficients to control quality of an image to be encoded; generating a parameter set having a plurality of band parameters, each band parameter corresponding to a coefficient of the modified scaling matrix; writing the encoded image data and the parameter set having the plurality of band parameters into a bitstream; and transmitting the bitstream over the network to a decoding device. The present disclosure may improve quality of the encoded image efficiently.

公开(公告)号：US20160198162A1

公开(公告)日：2016-07-07

申请号：US14984948

申请日：2015-12-30

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Jianhua ZHENG ,  Jianwen CHEN ,  Yun HE ,  Xinjian MENG

IPC: H04N19/174 ,  H04N19/176 ,  H04N19/70 ,  H04N19/18 ,  H04N19/46 ,  H04N19/61 ,  H04N19/126 ,  H04N19/177

CPC classification number: H04N19/174 ,  H04N19/126 ,  H04N19/154 ,  H04N19/176 ,  H04N19/177 ,  H04N19/18 ,  H04N19/46 ,  H04N19/61 ,  H04N19/70

Abstract: A method and apparatus is provided for encoding/decoding an image in a process of transmission. A plurality of frequency bands are divided into different frequency zones; a scaling value is assigned for each frequency zone; a scaling matrix is established with coefficients comprising the scaling values for the different frequency zones; wherein a number of the frequency zones is smaller than a number of coefficients in the matrix, and each frequency zone corresponds to one scaling value in the coefficient matrix such that every coefficient in said each frequency zone has the same scaling value that is assigned to said frequency bands; and corresponding quantization/dequantization is performed in process of encoding/decoding respectively using the scaling matrix,

Abstract translation: 提供了一种用于在传输过程中对图像进行编码/解码的方法和装置。 多个频带被分成不同的频带; 为每个频率区分配缩放值; 使用包括不同频率区域的缩放值的系数来建立缩放矩阵; 其中多个频域的数量小于矩阵中的系数数，并且每个频带对应于所述系数矩阵中的一个缩放值，使得所述每个频带中的每个系数具有分配给所述频域的相同缩放值 频带; 并且在分别使用缩放矩阵进行编码/解码的过程中执行相应的量化/去量化，