公开(公告)号：US20220417535A1

公开(公告)日：2022-12-29

申请号：US17902022

申请日：2022-09-02

申请人： TONGJI UNIVERSITY ,  ZTE CORPORATION

发明人： Tao LIN ,  Ming LI ,  Ping WU ,  Guoqiang SHANG ,  Zhao WU

IPC分类号： H04N19/176 ,  H04N19/17 ,  H04N19/70 ,  H04N19/186 ,  H04N19/593 ,  H04N19/182

摘要： Disclosed are an image encoding and decoding method, image processing device, and computer storage medium. the image coding method includes: when copying coding is performed on a current coding block by using one of the at least two different palette and pixel string copying coding manners, generating a new palette color according to pixels of the current coding block; generating a palette for the current coding block according to the new palette color and a palette color candidate set shared by the at least two different palette and pixel string copying coding manners; and performing palette and pixel string copying coding by using the palette for the current coding block, and generating a video bitstream comprising a copying manner and a copying parameter.

公开(公告)号：US20170013261A1

公开(公告)日：2017-01-12

申请号：US15108614

申请日：2014-12-29

申请人： TONGJI UNIVERSITY ,  ZTE CORPORATION

发明人： Tao LIN ,  Ming LI ,  Guoqiang SHANG

IPC分类号： H04N19/124 ,  H04N19/46 ,  H04N19/176 ,  H04N19/146 ,  H04N19/154

CPC分类号： H04N19/124 ,  H04N19/146 ,  H04N19/154 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

摘要： Provided are a method and device for coding an image, a method and device for decoding an image. The method for coding the image includes that: coding mode parameters and parameter groups of one coding block are divided into multiple types of coding mode parameters and parameter groups corresponding to the multiple types of coding mode parameters according to a specified rule respectively; Quantization Parameters (QPs) included in the multiple types of coding mode parameters are determined according to a preset target bit rate; a QP of the coding block is determined according to reconstruction quality for the coding block; a coding mode parameter to be used is selected from the multiple types of coding mode parameters according to the QP of the coding block, a parameter group corresponding to the selected coding mode parameter is set, and a QP difference is calculated; and the coding mode parameter, the parameter group used by the coding block and the QP difference are written into a video bitstream.

摘要翻译： 提供了用于对图像进行编码的方法和装置，用于对图像进行解码的方法和装置。 编码图像的方法包括：编码模式参数和一个编码块的参数组分别根据规定的规则分为对应于多种编码模式参数的多种类型的编码模式参数和参数组; 根据预设的目标比特率来确定包含在多种类型的编码模式参数中的量化参数（QPs）; 根据编码块的重构质量确定编码块的QP; 根据编码块的QP从多种类型的编码模式参数中选择要使用的编码模式参数，设置与所选编码模式参数相对应的参数组，并计算QP差; 并且编码模式参数，由编码块使用的参数组和QP差被写入视频比特流。

公开(公告)号：US20160330455A1

公开(公告)日：2016-11-10

申请号：US14912204

申请日：2014-08-15

申请人： TONGJI UNIVERSITY ,  ZTE CORPORATION

发明人： Tao LIN ,  Ming LI ,  Guoqiang SHANG ,  Zhao WU

IPC分类号： H04N19/182 ,  H04N19/154 ,  H04N19/91 ,  H04N19/593

CPC分类号： H04N19/182 ,  H04N19/11 ,  H04N19/154 ,  H04N19/172 ,  H04N19/503 ,  H04N19/593 ,  H04N19/61 ,  H04N19/91

摘要： The present invention provides an image compression method and device. When a coding block is coded, first, second and third reconstructed reference pixel sample sets, of which position labels are not intersected, are searched to obtain one or more optimal fixed-width variable-length pixel sample matching strings according to a preset evaluation criterion. Each matching string is represented by a matching distance and a matching length. For a sample of which a match is not found, a pseudo matching sample is calculated from an adjacent sample. Matching string searching may be performed in a pixel component plane only, and may also be performed in a three-component individually intersected pixel space in a packed format. Optional quantization or transformation-quantization coding, predictive coding, differential coding and entropy coding are further executed on the matching distance, the matching length and a matching residual. Multiple sample division manners and arrangement manners may be adopted for matching, and optimal ones are selected from them. For the same Coding Unit (CU), conventional-prediction-based hybrid coding is simultaneously performed, and an optimal result is selected finally.

摘要翻译： 本发明提供一种图像压缩方法和装置。 当对编码块进行编码时，搜索位置标签不相交的第一，第二和第三重建参考像素样本集合，以根据预设的评估标准获得一个或多个最优固定宽度可变长度像素样本匹配串 。 每个匹配的字符串由匹配的距离和匹配的长度表示。 对于未找到匹配的样本，从相邻样本计算伪匹配样本。 匹配字符串搜索可以仅在像素分量平面中执行，并且也可以以打包格式在三分量单独相交的像素空间中执行。 在匹配距离，匹配长度和匹配残差上进一步执行可选量化或变换量化编码，预测编码，差分编码和熵编码。 可以采用多种样本划分方式和排列方式进行匹配，从中选出最佳选择方式。 对于相同的编码单元（CU），同时执行基于常规预测的混合编码，最终选择最佳结果。

公开(公告)号：US20180242023A1

公开(公告)日：2018-08-23

申请号：US15507249

申请日：2015-05-06

申请人： TONGJI UNIVERSITY ,  ZTE CORPORATION

发明人： Tao LIN ,  Ming LI ,  Guoqiang SHANG ,  Zhao WU

IPC分类号： H04N19/91 ,  H04N19/182 ,  H04N19/157

CPC分类号： H04N19/91 ,  H04N19/157 ,  H04N19/182 ,  H04N19/517 ,  H04N19/593

摘要： An image coding method and apparatus and an image decoding method and apparatus are provided by the present document. The image coding method includes: implementing matching coding for pixels of an input video image to obtain one or more matching relationship parameters, herein the matching relationship parameters are parameters used in a process of constructing predicted values and/or reconstructed values of the pixels in the image; mapping the matching relationship parameters to obtain mapped values of the matching relationship parameters; and performing entropy coding on the mapped values of the matching relationship parameters. The present document addresses the problem existing in the conventional art which is caused by the direct implementation of entropy coding for matching relationship parameters and achieves a good data compression effect through entropy coding.

公开(公告)号：US20170332073A1

公开(公告)日：2017-11-16

申请号：US15529998

申请日：2015-11-17

申请人： TONGJI UNIVERSITY ,  ZTE CORPORATION

发明人： Tao LIN ,  Ming LI ,  Guoqiang SHANG

IPC分类号： H04N19/103 ,  H04N19/182 ,  H04N19/593 ,  H04N19/176 ,  H04N19/186

CPC分类号： H04N19/103 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/593

摘要： Disclosed is an image coding method, including: determining a coding mode of a coding block; and performing coding on the coding block using multiple coding modes, including performing coding on pixel sample segments in the coding block using one of the multiple coding modes. Further disclosed is an image decoding method, including: parsing bitstream data of a decoding block, and determining decoding modes of pixel sample segments of the decoding block; and performing hybrid decoding on the decoding block using multiple decoding modes, including performing decoding on the pixel sample segments of the decoding block using corresponding decoding modes. The technical scheme described above can fully exploit and utilize the characteristics of each coding image region in the image to improve the image compression performance.

公开(公告)号：US20170054988A1

公开(公告)日：2017-02-23

申请号：US15118980

申请日：2015-02-16

申请人： TONGJI UNIVERSITY ,  ZTE Corporation

发明人： Tao LIN ,  Ming LI ,  Guoqiang SHANG

IPC分类号： H04N19/167 ,  H04N19/11 ,  H04N19/593 ,  H04N19/176 ,  H04N19/196 ,  H04N19/105 ,  H04N19/159

CPC分类号： H04N19/167 ,  H04N19/105 ,  H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196 ,  H04N19/593

摘要： Provided are methods and devices for coding or decoding an image. The coding method includes that: one coding manner is selected for predictive or matching coding of a current CU, according to characteristics of pixel samples of the current CU and an adjacent CU of the current CU, from A predetermined predictive coding manners and matching coding manners including at least one predictive coding manner with different prediction characteristics and matching coding manners with mutually different matching characteristics, and the selected coding manner is determined as an optimal coding manner, wherein the A predictive coding manners and matching coding manners include: a predictive coding manner, matching coding manner 1, matching coding manner 2, . . . and matching coding manner A-1, and A is an integer more than or equal to 2; and predictive coding or matching coding is performed on the current CU by adopting the optimal coding manner.

摘要翻译： 提供了用于对图像进行编码或解码的方法和装置。 编码方法包括：根据预定的预测编码方式和匹配的编码方式，根据当前CU的当前CU和相邻CU的像素样本的特性，选择一种编码方式来预测或匹配当前CU的编码 包括具有不同预测特性的至少一种预测编码方式和具有相互不同的匹配特性的匹配编码方式，并且将选择的编码方式确定为最佳编码方式，其中A预测编码方式和匹配编码方式包括：预测编码方式 ，匹配编码方式1，匹配编码方式2， 。 。 和匹配编码方式A-1，A是大于或等于2的整数; 并且通过采用最佳编码方式对当前CU执行预测编码或匹配编码。

公开(公告)号：US20190110079A1

公开(公告)日：2019-04-11

申请号：US16090101

申请日：2017-02-10

申请人： TONGJI UNIVERSITY ,  ZTE CORPORATION

发明人： Tao LIN ,  Liping ZHAO ,  Kailun ZHOU ,  Shuhui WANG ,  Ming LI ,  Ping WU ,  Zhao WU

IPC分类号： H04N19/70 ,  H04N19/103 ,  H04N19/176 ,  H04N19/46

CPC分类号： H04N19/70 ,  H04N19/103 ,  H04N19/11 ,  H04N19/176 ,  H04N19/42 ,  H04N19/46 ,  H04N19/463 ,  H04N19/52 ,  H04N19/537 ,  H04N19/593 ,  H04N19/61

摘要： Provided is an encoding and decoding method and device for data compression. The encoding method includes: adaptively selecting a constrained string mode from a plurality of preset constrained string modes; and performing, according to the selected constrained string mode, string-matching encoding on a coding block to obtain information of a constrained string encoded in the selected constrained string mode and to obtain a bitstream of a syntax element of the constrained string encoded in the selected constrained string mode.

公开(公告)号：US20180035132A1

公开(公告)日：2018-02-01

申请号：US15551945

申请日：2016-01-25

申请人： TONGJI UNIVERSITY ,  ZTE Corporation

发明人： Tao LIN ,  Ming LI ,  Guoqiang SHANG ,  Zhao WU

IPC分类号： H04N19/59 ,  H04N19/593 ,  H04N19/70 ,  H04N19/176

摘要： The present disclosure provides a method and device for image coding and a method and device for image decoding, and the method includes: a representative pixel set of a coding block is constructed, and information for constructing the representative pixel set is determined; predicted values of pixel samples in the coding block are constructed, a generation manner for the predicted values including: constructing the predicted values of the pixel samples according to reconstructed pixel samples in an image region outside the coding block and pixel values of the representative pixel set; and the information for constructing the representative pixel set and information for constructing the predicted values are coded and written into a video bitstream.

公开(公告)号：US20180027235A1

公开(公告)日：2018-01-25

申请号：US15549408

申请日：2016-02-05

申请人： TONGJI UNIVERSITY ,  ZTE Corporation

发明人： Tao LIN ,  Ming LI ,  Guoqiang SHANG ,  Zhao WU

IPC分类号： H04N19/129 ,  H04N19/593 ,  H04N19/44 ,  H04N19/176

摘要： An image coding method and apparatus, and an image decoding method and apparatus are provided. In the coding method, a scanning manner parameter of a coding block is determined, and the scanning manner parameter may include at least one of: a region indication parameter used for determining a scanning region of the coding block and a scanning indication parameter used for determining a scanning order of pixels in a scanning region of the coding block; predicted values of part or all of pixels in the coding block are determined according to the scanning manner parameter; and the coding block is coded according to the predicted values, and a coding result is written into a bitstream.

公开(公告)号：US20170006285A1

公开(公告)日：2017-01-05

申请号：US15114278

申请日：2014-12-01

申请人： TONGJI UNIVERSITY ,  ZTE Corporation

发明人： Tao LIN ,  Ming LI ,  Guoqiang SHANG

IPC分类号： H04N19/119 ,  H04N19/513 ,  H04N19/12 ,  H04N19/176

摘要： The disclosure discloses a method and device for coding an image and a method and device for decoding an image. The coding includes that: a coding block is partitioned into L micro-blocks, wherein L is a preset number of micro-block partitions in the decoding block; Displacement Vectors (DVs) between the micro-blocks and reference micro-blocks in a preset reconstructed pixel sample set are determined, wherein the DVs are vectors between pixel positions of the reference micro-blocks and pixel positions of the micro-blocks in a preset pixel coordinate system; and the DVs are coded and written into a bitstream. By the methods and the devices, the problem of low image compression and decompression efficiency during image coding and decoding in the related technology is solved, and the effect of improving image coding and decoding efficiency is further achieved.

摘要翻译： 本公开公开了一种用于对图像进行编码的方法和装置，以及用于对图像进行解码的方法和装置。 该编码包括：编码块被分割成L个微块，其中L是解码块中的预定数量的微块分区; 确定预置的重建像素样本集中的微块和参考微块之间的位移向量（DV），其中DV是参考微块的像素位置与预设中的微块的像素位置之间的向量 像素坐标系; 并且将DV编码并写入比特流。 通过方法和装置，解决了相关技术中图像编码和解码过程中低图像压缩和解压缩效率的问题，进一步实现了提高图像编码和解码效率的效果。