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：US20210235097A1

公开(公告)日：2021-07-29

申请号：US17230699

申请日：2021-04-14

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

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

IPC: H04N19/176 ,  H04N19/60 ,  H04N19/172 ,  H04N19/184

Abstract: This application provides a transform method and an inverse transform method for a picture block, and an apparatus. The transform method for a picture block in this application includes: obtaining a to-be-encoded picture block in a to-be-processed picture, where the to-be-encoded picture block is an object on which encoding is performed; splitting the to-be-encoded picture block to obtain a plurality of picture subblocks; and transforming at least one of the picture subblocks. In this application, picture encoding efficiency is improved.

公开(公告)号：US20200021850A1

公开(公告)日：2020-01-16

申请号：US16579440

申请日：2019-09-23

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

Inventor： Benben NIU ,  Quanhe YU ,  Junyou CHEN ,  Jianhua ZHENG ,  Yun HE

IPC: H04N19/61 ,  H04N19/176 ,  H04N19/11 ,  H04N19/513 ,  H04N19/182 ,  H04N19/147

Abstract: The present disclosure disclose a video data decoding method. The method includes: receiving a bitstream; parsing the bitstream to obtain residual data of a current to-be-decoded image block, prediction information of the current to-be-decoded image block, and a pixel value transformation mode identifier of the current to-be-decoded block; obtaining predictors of the current to-be-decoded image block; obtaining reconstructed pixel values of pixels of the current to-be-decoded image block; and performing spatial transformation on the reconstructed pixel values of the pixels of the current to-be-decoded image block according to a pixel value transformation mode corresponding to the transformation mode identifier of the current to-be-decoded image block, to obtain transformed pixel values of the pixels of the current to-be-decoded image block. The embodiments of the present disclosure further disclose a video data encoding method, a decoding apparatus, and an encoding apparatus.

公开(公告)号：US20200014927A1

公开(公告)日：2020-01-09

申请号：US16573148

申请日：2019-09-17

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

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

IPC: H04N19/126 ,  H04N19/17 ,  H04N19/174 ,  H04N19/436 ,  H04N19/61 ,  H04N19/70 ,  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：US20180324453A1

公开(公告)日：2018-11-08

申请号：US16032748

申请日：2018-07-11

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

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

IPC: H04N19/517 ,  H04N19/48 ,  H04N19/176 ,  H04N19/12 ,  H04N19/172 ,  H04N19/147 ,  H04N19/463

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.

公开(公告)号：US20160198163A1

公开(公告)日：2016-07-07

申请号：US14985015

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 ,  H04N19/61 ,  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: An apparatus at an encoding end and an apparatus at decoding end are provided for implementing quantization in encoding and decoding an image in a process of transmission. The apparatus at an encoding end includes a memory storage and a processor coupled to the memory that executes the instructions to perform quantization using a coefficient matrix on an image, the coefficient matrix having a plurality of coefficients which being divided into a plurality of frequency bands, wherein a number of the frequency bands is smaller than a number of coefficients in the coefficient matrix; a scaling value is assigned that every coefficient in said each frequency band has the same scaling value; generate a parameter set having multiple band parameters thereof and write the parameter set into a bitstream to be transmitted. An apparatus at a decoding end performs decoding process thereof.

Abstract translation: 提供编码端的装置和解码端的装置，用于在传输过程中对图像进行编码和解码实现量化。 编码端的装置包括存储器存储器和耦合到存储器的处理器，其执行使用图像上的系数矩阵执行量化的指令，所述系数矩阵具有被划分成多个频带的多个系数， 其中所述频带的数量小于所述系数矩阵中的系数数; 分配缩放值，表示所述每个频带中的每个系数具有相同的缩放值; 生成具有多个频带参数的参数集，并将参数集写入要发送的比特流中。 解码端的装置执行解码处理。

公开(公告)号：US20140086313A1

公开(公告)日：2014-03-27

申请号：US14094193

申请日：2013-12-02

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

Inventor： Jianhua ZHENG ,  Yun HE ,  Jianwen CHEN

IPC: H04N7/26

CPC classification number: H04N19/124 ,  H04N19/107 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196 ,  H04N19/61

Abstract: A method for realizing adaptive quantization in image encoding and dequantization in image decoding is disclosed. In the adaptive quantization method, an image to be encoded is divided into one or more blocks, and each block is transformed to obtain one or more transform coefficients, the method comprising: acquiring parameter information of neighbor blocks of a current block; determining a quantization mode for the current block according to the parameter information of the neighbor blocks; and quantizing transform coefficients of the current block in the determined quantization mode. The quantization mode includes at least one of quantization matrix, quantization parameter and quantization step.

Abstract translation: 公开了一种在图像解码中进行图像编码和去量化中的自适应量化的方法。 在自适应量化方法中，将要编码的图像划分为一个或多个块，并且对每个块进行变换以获得一个或多个变换系数，所述方法包括：获取当前块的相邻块的参数信息; 根据相邻块的参数信息确定当前块的量化模式; 以及在所确定的量化模式中量化当前块的变换系数。 量化模式包括量化矩阵，量化参数和量化步骤中的至少一个。

公开(公告)号：US20130301707A1

公开(公告)日：2013-11-14

申请号：US13938992

申请日：2013-07-10

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

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

IPC: H04N7/26

CPC classification number: H04N19/119 ,  H04N19/124 ,  H04N19/147 ,  H04N19/172 ,  H04N19/46 ,  H04N19/61

Abstract: An encoding method with multiple image block division manners is disclosed, including: determining a division manner and a division direction of an image block; dividing the image block to obtain image subblocks sequentially arranged horizontally or vertically; determining whether the image subblocks need subdivision, and if subdivision is not needed, predicting the encoding object in the frame according to the image subblocks, to obtain residual data; performing transformation, quantization, and entropy encoding for the residual data so as to obtain coded residual data; and writing the division manner of the image block, the division direction of the image block, an identifier indicating whether the image subblocks need subdivision, and the coded residual data into a bitstream. By applying the encoding method, better prediction accuracy can be achieved when the image block presents a small change of pixel value in the horizontal or vertical direction.

Abstract translation: 公开了具有多个图像块分割方式的编码方法，包括：确定图像块的分割方式和分割方向; 划分图像块以获得顺序地水平或垂直布置的图像子块; 确定图像子块是否需要细分，如果不需要细分，则根据图像子块预测该帧中的编码对象，以获得残差数据; 对残差数据执行变换，量化和熵编码，以获得编码的残差数据; 并写入图像块的分割方式，图像块的分割方向，指示图像子块是否需要细分的标识符，以及将编码的残差数据写入比特流。 通过应用编码方法，当图像块在水平或垂直方向呈现小的像素值变化时，可以获得更好的预测精度。