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：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，