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31. 发明授权

US08275033B2 Picture mode selection for video transcoding 失效
标题翻译：视频转码的图像模式选择
公开(公告)号：US08275033B2
公开(公告)日：2012-09-25
申请号：US12009054
申请日：2008-01-15
申请人： Ximin Zhang , Ming-Chang Liu
发明人： Ximin Zhang , Ming-Chang Liu
IPC分类号： H04N7/12 , H04N11/02 , H04N11/04 , G06K9/46
CPC分类号： H04N19/103 , H04N19/139 , H04N19/14 , H04N19/16 , H04N19/176 , H04N19/40 , H04N19/61
摘要： An adaptive picture mode selection transcoder selects an encoding mode in a second format for frames of video previously encoded in a first format by determining a magnitude of interlacing phenomenon in the using picture information obtained during decoding of the video from the first format. In one aspect, the picture information includes discrete cosine coefficients for macroblocks in the frame. In another aspect, the picture information includes an encoding mode for the macroblocks in the first format. In yet another aspect, the picture information includes motion vector information for the macroblocks. In still another aspect, the determining is specific to an encoding mode for the frame.
摘要翻译：自适应图像模式选择代码转换器通过确定在从第一格式的视频解码期间获得的使用图像信息中的交织现象的大小来选择第二格式的用于以第一格式预编码的视频帧的编码模式。在一个方面，图像信息包括用于该帧中的宏块的离散余弦系数。在另一方面，图像信息包括用于第一格式的宏块的编码模式。在另一方面，图像信息包括用于宏块的运动矢量信息。在另一方面，该确定特定于该帧的编码模式。

32. 发明授权

US08204329B2 System and method for image quality enhancement by reducing the effects of air pollution and haze 失效
标题翻译：通过减少空气污染和雾霾的影响，提高图像质量的系统和方法
公开(公告)号：US08204329B2
公开(公告)日：2012-06-19
申请号：US12486519
申请日：2009-06-17
申请人： Ximin Zhang , Ming-Chang Liu
发明人： Ximin Zhang , Ming-Chang Liu
IPC分类号： G06K9/40
CPC分类号： G06T5/008
摘要： A low cost image quality enhancement method to be utilized in an ordinary consumer camera and for post processing of an existing image database is described herein. The quality enhancement is transferred into an adaptive intensity stretching process in the YUV domain. A different enhancement process is designed for a luminance (Y) channel and chrominance (UV) channel. The parameters in the enhancement process are estimated based on the contents of the image. After the stretching-based enhancement, an adaptive unsharp masking process is applied to the luminance data. The quality is significantly improved for the images shot under unfavorable conditions.
摘要翻译：这里描述了在普通消费者相机中使用的低成本图像质量增强方法和用于对现有图像数据库进行后处理的方法。质量增强转移到YUV域中的自适应强度拉伸过程。为亮度（Y）通道和色度（UV）通道设计了不同的增强过程。基于图像的内容来估计增强处理中的参数。在基于拉伸的增强之后，对亮度数据应用自适应锐化掩蔽处理。在不利条件下拍摄的图像质量明显提高。

33. 发明申请

US20100067818A1 System and method for high quality image and video upscaling 审中-公开
标题翻译：高质量图像和视频放大的系统和方法
公开(公告)号：US20100067818A1
公开(公告)日：2010-03-18
申请号：US12283855
申请日：2008-09-15
申请人： Ximin Zhang , Ming-Chang Liu
发明人： Ximin Zhang , Ming-Chang Liu
IPC分类号： G06K9/40
CPC分类号： G06T3/403
摘要： A low complexity upscaling method to generate higher resolution image and video with high quality is described herein. Natural edge smoothness and sharpness are preserved while overshooting artifacts and the “edge dilation” problem are eliminated. To obtain edge smoothness and remove jaggy artifacts along the edge, a bi-directional filtering which is based on two orthogonal directions is used to generate higher resolution pixels. The direction close to the edge direction is heavily weighted, and the direction far from the edge direction is lightly weighted. The weight of each direction is determined by the developed directional vector difference measurement method. To eliminate the overshooting artifacts and solving the thick edge problem, a dual-sided interpolation method is implemented. By using the dual-sided interpolation method, the interpolation result is pushed towards a dominant transition desired location which removes overshooting artifacts. A thin and sharp edge is obtained instead of a blurred, thick edge.
摘要翻译：这里描述了一种用于产生高质量的更高分辨率图像和视频的低复杂度升频方法。保留自然边缘的平滑度和清晰度，同时消除过冲人造物和“边缘扩张”问题。为了获得边缘平滑度并沿着边缘去除锯齿状伪影，使用基于两个正交方向的双向滤波来产生更高分辨率的像素。靠近边缘方向的方向是重度加权的，远离边缘方向的方向被轻重加权。每个方向的重量由开发的方向矢量差测量方法确定。为了消除过冲伪影和解决粗边缘问题，实现了双面插值方法。通过使用双面插值方法，将插值结果推向主导转移期望位置，从而消除过冲伪影。获得薄而锋利的边缘而不是模糊的粗边。

34. 发明申请

US20140177728A1 METHOD AND SYSTEM OF TRANSFORM BLOCK PROCESSING ACCORDING TO QUANTIZATION MATRIX IN VIDEO CODING 有权
标题翻译：基于视频编码的量化矩阵的变换块处理方法与系统
公开(公告)号：US20140177728A1
公开(公告)日：2014-06-26
申请号：US14234505
申请日：2012-08-21
申请人： Ximin Zhang , Shan Liu
发明人： Ximin Zhang , Shan Liu
IPC分类号： H04N19/122 , H04N19/60 , H04N19/18
CPC分类号： H04N19/126 , H04N19/122 , H04N19/176 , H04N19/18 , H04N19/197 , H04N19/198 , H04N19/60 , H04N19/70 , H04N19/80
摘要： A method and system for processing transform blocks according to quantization matrices in a video coding system are disclosed. Embodiments of the present invention derive one or more derived quantization matrices from one or more initial quantization matrices or from one previously derived quantization matrix. In one embodiment, the initial quantization matrices include a 4×4 and 8×8 quantization matrices, which can be either default or user-defined. All quantization matrices larger than 8×8 can be derived from the 4×4 and 8×8 initial quantization matrices. Non-square quantization matrices can be derived from at least one initial square quantization matrix or at least one derived square quantization matrix. Individual initial quantization matrices may be used to derive respective larger quantization matrices. Furthermore, the individual initial quantization matrices may be derived from larger quantization matrices designed for corresponding transform sizes. Syntax design to enable the quantization matrix representation is also disclosed.
摘要翻译：公开了一种根据视频编码系统中的量化矩阵来处理变换块的方法和系统。本发明的实施例从一个或多个初始量化矩阵或从一个先前导出的量化矩阵导出一个或多个导出的量化矩阵。在一个实施例中，初始量化矩阵包括4×4和8×8个量化矩阵，其可以是默认的或用户定义的。大于8×8的所有量化矩阵可以从4×4和8×8个初始量化矩阵导出。可以从至少一个初始平方量化矩阵或至少一个导出的平方量化矩阵导出非平方量化矩阵。各个初始量化矩阵可以用于导出相应较大的量化矩阵。此外，各个初始量化矩阵可以从为相应的变换大小设计的较大的量化矩阵导出。还公开了启用量化矩阵表示的语法设计。

35. 发明申请

US20140140404A1 METHOD AND APPARATUS FOR INTRA PREDICTION USING NON-SQUARE BLOCKS 有权
标题翻译：使用非正方形块进行预测的方法和装置
公开(公告)号：US20140140404A1
公开(公告)日：2014-05-22
申请号：US14234152
申请日：2012-07-26
申请人： Shan Liu , Ximin Zhang , Shaw-Min Lei
发明人： Shan Liu , Ximin Zhang , Shaw-Min Lei
IPC分类号： H04N19/105 , H04N19/182 , H04N19/136
CPC分类号： H04N19/105 , H04N19/11 , H04N19/119 , H04N19/122 , H04N19/132 , H04N19/136 , H04N19/147 , H04N19/176 , H04N19/182 , H04N19/33 , H04N19/593 , H04N19/70
摘要： A method and apparatus for Intra prediction of a block based on neighboring pixels around the block are disclosed. Embodiments according to the present invention use square blocks as well as non-square blocks for Intra prediction. For a 2N×2N Luma CU (coding unit), the CU can be partitioned into 2N×N, N×2N, 2N×2N or N×N PUs. The 2N×N and N×2N PUs can be further processed by either square transforms only or both non-square and square transforms. In one embodiment, the 2N×N PU or the N×2N PU is processed as two N×N TUs (transform units) and each of the N×N TU is further split into smaller N×N TUs based on quad-tree split. In another embodiment, the 2N×N and N×2N PUs are processed as two 2N×0.5N and 0.5N×2N TUs respectively.
摘要翻译：公开了一种基于块周围的相邻像素进行帧内预测的方法和装置。根据本发明的实施例使用平方块以及用于帧内预测的非方块。对于2N×2N亮度CU（编码单元），CU可以划分为2N×N，N×2N，2N×2N或N×N个PU。 2N×N和N×2N个PU可以通过正方形变换或非正方形和正方形变换进一步处理。在一个实施例中，2N×N PU或N×2N PU被处理为两个N×N个TU（变换单元），并且N×N TU中的每一个进一步被分割成基于四叉树分割的较小的N×N个TU 。在另一个实施例中，2N×N和N×2N个PU分别被处理为两个2N×0.5N和0.5N×2N个TU。

36. 发明申请

US20120195366A1 Method and Apparatus of Adaptive Inter Mode Coding Using Variable Length Codes 审中-公开
标题翻译：使用可变长度码的自适应帧间编码的方法和装置
公开(公告)号：US20120195366A1
公开(公告)日：2012-08-02
申请号：US13108055
申请日：2011-05-16
申请人： Shan Liu , Ximin Zhang , Shaw-Min Lei
发明人： Shan Liu , Ximin Zhang , Shaw-Min Lei
IPC分类号： H04N7/26
CPC分类号： H04N19/174 , H04N19/13 , H04N19/159 , H04N19/61 , H04N19/70
摘要： A method and apparatus for adaptive inter prediction mode coding are disclosed. In the current HEVC, a fixed set of variable length codes is used for the underlying video data, which may not optimally match the statistics of underlying video data. Consequently, the compression efficiency associated with the fixed set of variable length codes will be compromised. Accordingly, an adaptive coding scheme for inter prediction modes is disclosed. The variable length codes used for each inter prediction mode in each coding unit depth is adaptively determined by its respective statistics. The statistics can be measured as the frequency of occurrence of each mode. In one embodiment according to the present invention, counters are used to collect the statistics. According to one embodiment of the present invention, the statistics of inter prediction modes are collected from the previous slice and the set of variable length codes is determined for the subsequent slice (immediately following the previous slice) accordingly. According to another embodiment of the present invention, the statistics of inter prediction modes are updated for each coding unit and the variable length code for each mode is adjusted according to the statistics change during the coding process. According to another embodiment of the present invention, the variable length code for each mode is reset in the beginning of each slice. The reset code word table is either a predefined code word table for whole sequence or a code word table determined by the previous slice.
摘要翻译：公开了一种自适应帧间预测模式编码的方法和装置。在当前的HEVC中，一组固定的可变长度代码用于底层视频数据，这可能不能最佳地匹配底层视频数据的统计。因此，与固定的可变长度代码组相关联的压缩效率将受到损害。因此，公开了一种用于帧间预测模式的自适应编码方案。在每个编码单元深度中用于每个帧间预测模式的可变长度码由其各自的统计量自适应地确定。统计量可以作为每种模式发生的频率进行测量。在根据本发明的一个实施例中，使用计数器来收集统计信息。根据本发明的一个实施例，从先前的片段收集帧间预测模式的统计，并且相应地为随后的片段（紧接着先前的片段）确定可变长度码集合。根据本发明的另一实施例，针对每个编码单元更新帧间预测模式的统计，并且根据编码处理期间的统计变化来调整每种模式的可变长度码。根据本发明的另一实施例，每个模式的可变长度代码在每个切片的开头被复位。复位码字表是用于整个序列的预定义码字表或由先前片确定的码字表。

37. 发明授权

US07885476B2 System and method for effectively performing an adaptive encoding procedure 有权
标题翻译：用于有效执行自适应编码过程的系统和方法
公开(公告)号：US07885476B2
公开(公告)日：2011-02-08
申请号：US11638810
申请日：2006-12-14
申请人： Ximin Zhang
发明人： Ximin Zhang
IPC分类号： G06K9/36 , G06K9/46
CPC分类号： H04N19/122 , H04N19/126 , H04N19/14 , H04N19/176 , H04N19/61
摘要： A system and method for effectively performing an adaptive encoding procedure includes a texture analyzer that initially determines texture characteristics for blocks of input image data. An image transformer converts the blocks of image data into sets of coefficients that represent the various blocks. A block categorizer utilizes the texture characteristics to associate texture categories with the sets of coefficients from the various blocks. Deadzone tables are provided for storing deadzone values that define deadzone regions for performing appropriate quantization procedures. A quantizer may then access the deadzone values from the deadzone tables to adaptively convert the coefficients into quantized coefficients according to their corresponding texture characteristics.
摘要翻译：用于有效执行自适应编码过程的系统和方法包括纹理分析器，其最初确定输入图像数据块的纹理特征。图像变换器将图像数据块转换为表示各种块的系数集合。块分类器利用纹理特征将纹理类别与来自各种块的系数集相关联。死区表用于存储定义死区的死区值，用于执行适当的量化过程。然后，量化器可以从死区表访问死区值，以根据其对应的纹理特征将系数自适应地转换为量化系数。

38. 发明申请

US20080170620A1 VIDEO ENCODING SYSTEM 审中-公开
标题翻译：视频编码系统
公开(公告)号：US20080170620A1
公开(公告)日：2008-07-17
申请号：US11623954
申请日：2007-01-17
申请人： Ximin Zhang
发明人： Ximin Zhang
IPC分类号： H04N7/12 , H04N11/02
CPC分类号： H04N19/86 , H04N19/122 , H04N19/124 , H04N19/14 , H04N19/154 , H04N19/17 , H04N19/176 , H04N19/20 , H04N19/61
摘要： A video encoding system is provided including analyzing a picture; providing transforms; selecting a transform from the transforms by comparing a luminance characteristic of the picture with a human visual system texture criterion of the picture; and applying the transform for encoding and displaying the picture.
摘要翻译：提供一种视频编码系统，包括分析图像; 提供转换; 通过将图像的亮度特性与图像的人类视觉系统纹理标准进行比较来从变换中选择变换; 以及应用用于对图像进行编码和显示的变换。

39. 发明授权

US09363511B2 Method and apparatus for Intra mode coding in HEVC 有权
标题翻译： HEVC内模式编码的方法和装置
公开(公告)号：US09363511B2
公开(公告)日：2016-06-07
申请号：US13810205
申请日：2012-08-28
申请人： Ximin Zhang , Shan Liu
发明人： Ximin Zhang , Shan Liu
IPC分类号： H04N19/50 , H04N19/463 , H04N19/593 , H04N19/11 , H04N7/32 , H04N7/26 , H04N19/61
CPC分类号： H04N19/593 , H04N19/11 , H04N19/463 , H04N19/50 , H04N19/61
摘要： A method and apparatus for Intra prediction mode encoding or decoding based on multi-level most probable modes (MPMs) are disclosed. In one embodiment according to the present invention, the method and apparatus for encoding or decoding Intra prediction mode for 4×4 prediction unit (PU) use 19 Intra mode candidates to have full directional coverage or 35 Intra mode candidates as used by 8×8, 16×16 and 32×32 PUs. In another embodiment of the present invention, three MPMs are used to code the Intra modes. Various methods to derive the three MPMs based on the Intra modes of neighboring blocks are disclosed. In yet another embodiment of the present invention, the coding method for the remaining modes comprises fixed length coding. In addition, variable length coding for the remaining modes are also disclosed.
摘要翻译：公开了一种基于多级最可能模式（MPM）的帧内预测模式编码或解码的方法和装置。在根据本发明的一个实施例中，用于编码或解码用于4×4预测单元（PU）的帧内预测模式的方法和装置使用19个模式内候选以具有全方位覆盖或35×8模式候选，如8×8 ，16×16和32×32 PU。在本发明的另一实施例中，使用三个MPM来编码内部模式。公开了基于相邻块的帧内模式导出三个MPM的各种方法。在本发明的另一个实施例中，其余模式的编码方法包括固定长度编码。此外，还公开了其余模式的可变长度编码。

40. 发明申请

US20080232465A1 SYSTEM AND METHOD OF FAST MPEG-4/AVC QUANTIZATION 失效
标题翻译：快速MPEG-4 / AVC量化的系统与方法
公开(公告)号：US20080232465A1
公开(公告)日：2008-09-25
申请号：US11688130
申请日：2007-03-19
申请人： Ximin Zhang
发明人： Ximin Zhang
IPC分类号： H04N11/04
CPC分类号： H04N19/18 , H04N19/126 , H04N19/132 , H04N19/139 , H04N19/14 , H04N19/149 , H04N19/176 , H04N19/61 , H04N19/91
摘要： A system and method for coding moving pictures according to MPEG-4/AVC is described which performs rapid quantization of the transformed residue signal is described. The system and method may employ a number of techniques, which may be considered separately or in combination, including: extreme macroblock (MB) analysis, pre-execution table generation, conditional skipping, and picture level scaling. For example, MBs are detected wherein the quantization scale is adapted prior to quantization processing. The quantization process can be skipped for DCT coefficients which do not meet a threshold criterion. Weighted quantization can be readily performed in response to generating sets of scaled quantization tables in the beginning of encoding each picture, wherein the quantization scale of the DCT coefficients need not be scaled in response to position.
摘要翻译：描述了一种用于编码根据MPEG-4 / AVC的运动图像的系统和方法，其描述了进行变换的残留信号的快速量化。系统和方法可以采用多种技术，其可以单独地或组合地考虑，包括：极限宏块（MB）分析，预执行表生成，条件跳过和图像级缩放。例如，检测MB，其中量化尺度在量化处理之前被适配。可以跳过不符合阈值标准的DCT系数的量化处理。加权量化可以在编码每个图像的开始时响应于生成的缩放量化表集合容易地执行，其中DCT系数的量化尺度不需要根据位置进行缩放。

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