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1. 发明授权

US06925120B2 Transcoder for scalable multi-layer constant quality video bitstreams 失效
标题翻译：用于可扩展多层恒定质量视频比特流的转码器
公开(公告)号：US06925120B2
公开(公告)日：2005-08-02
申请号：US09961987
申请日：2001-09-24
申请人： Ximin Zhang , Anthony Vetro , Yun-Qing Shi , Huifang Sun
发明人： Ximin Zhang , Anthony Vetro , Yun-Qing Shi , Huifang Sun
IPC分类号： H04N7/26 , H04N21/2343 , H04N21/2365 , H04N21/24 , H04N21/2662 , H04N21/434 , H04N21/4402 , H04N7/12
CPC分类号： H04N21/2662 , H04N19/147 , H04N19/154 , H04N19/19 , H04N19/33 , H04N19/34 , H04N19/40 , H04N21/234327 , H04N21/23655 , H04N21/2402 , H04N21/4347
摘要： A method codes an output bitstream of an input video so the decoded output bitstream has a constant perceived quality. A base layer bitstream having a constant bit-rate is generated from the input video, and an input enhancement layer bitstream is generated from a difference between the input video and the base layer bitstream. Rate and distortion characteristics are extracted from the base layer bitstream and the input enhancement layer bitstream, and an output enhancement layer bitstream having a variable bit-rate is generated from the input enhancement layer bitstream according to the rate and distortion characteristics. The base layer bitstream and the output enhancement layer bitstream, in combination, form an output bitstream having a variable bit-rate and a constant distortion.
摘要翻译：一种方法对输入视频的输出比特流进行编码，使得解码的输出比特流具有恒定的感知质量。从输入视频产生具有恒定比特率的基本层比特流，并且从输入视频和基本层比特流之间的差异生成输入增强层比特流。从基本层比特流和输入增强层比特流中提取速率和失真特性，并且根据速率和失真特性从输入增强层比特流生成具有可变比特率的输出增强层比特流。基本层比特流和输出增强层比特流组合形成具有可变比特率和恒定失真的输出比特流。

2. 发明授权

US07092442B2 System and method for adaptive field and frame video encoding using motion activity 失效
标题翻译：使用运动活动的自适应场和帧视频编码的系统和方法
公开(公告)号：US07092442B2
公开(公告)日：2006-08-15
申请号：US10325986
申请日：2002-12-19
申请人： Ximin Zhang , Anthony Vetro , Huifang Sun
发明人： Ximin Zhang , Anthony Vetro , Huifang Sun
IPC分类号： H04N7/12
CPC分类号： H04N19/137 , H04N19/112 , H04N19/172
摘要： A method adaptively encodes a video including a sequence of images, where each image is a picture of two fields. Each image is first separated into a top-field and a bottom-field. Motion activity is extracted from the top-field and the bottom-field, and each image is encoded using either frame encoding or field encoding depending on the extracted motion activity.
摘要翻译：一种自适应地编码包括图像序列的视频，其中每个图像是两个场的图像。每个图像首先分为顶场和底场。从顶场和底场提取运动活动，并且根据提取的运动活动，使用帧编码或场编码对每个图像进行编码。

3. 发明授权

US07280597B2 System and method for determining coding modes, DCT types and quantizers for video coding 失效
标题翻译：用于确定编码模式的系统和方法，用于视频编码的DCT类型和量化器
公开(公告)号：US07280597B2
公开(公告)日：2007-10-09
申请号：US10602963
申请日：2003-06-24
申请人： Ximin Zhang , Hao-Song Kong , Anthony Vetro , Huifang Sun
发明人： Ximin Zhang , Hao-Song Kong , Anthony Vetro , Huifang Sun
IPC分类号： H04N7/12 , H04N11/02
CPC分类号： H04N19/192 , H04N19/112 , H04N19/122 , H04N19/124 , H04N19/147 , H04N19/149 , H04N19/172 , H04N19/19 , H04N19/196 , H04N19/197 , H04N19/61
摘要： A method encodes a video by first measuring a variance of pixel intensities in a current frame. A number of bits to encode the current frame is assigned according to rate and buffer fullness constraints. A multiplier value is determined directly as a function of only the variance and the number of bits assigned to the current frame. Motion vectors between a reference frame and the current frame are estimated, and a sum of absolute difference (SAD) is based on a motion compensated residual between the reference frame and the current frame. An encoding mode is determined for each macro block in the current frame based on the sum of absolute difference, the motion vectors and the multiplier value. Then, the motion compensated residual is encoded based on the encoding mode, multiplier value and the number of allocated bits.
摘要翻译：一种方法通过首先测量当前帧中的像素强度的方差来对视频进行编码。根据速率和缓冲区满足约束来分配对当前帧进行编码的位数。根据分配给当前帧的方差和比特数，直接确定乘数值。估计参考帧与当前帧之间的运动向量，并且绝对差（SAD）之和基于参考帧与当前帧之间的运动补偿残差。基于绝对差，运动矢量和乘数值之和确定当前帧中的每个宏块的编码模式。然后，基于编码模式，乘数值和分配位数来对运动补偿残差进行编码。

4. 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。

5. 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。

6. 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。

7. 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。

8. 发明申请

US20100321513A1 CONTENT ADAPTIVE DETECTION OF IMAGES WITH STAND-OUT OBJECT 有权
标题翻译：内容自适应检测图像与标准对象
公开(公告)号：US20100321513A1
公开(公告)日：2010-12-23
申请号：US12486487
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： H04N5/228 , G06K9/48 , G06K9/34
CPC分类号： G06K9/00
摘要： Content adaptive detection of images having stand-out objects involves block variance-based detection and determining if an object includes a stand-out object. The images with a stand-out object are further processed to isolate an object of interest. The images without a detected stand-out object are further processed with a transition map-based detection method which includes generating a transition map. If an object portrait is determined from the transition map, then the image is further processed to isolate the object of interest.
摘要翻译：具有突出对象的图像的内容自适应检测涉及基于块方差的检测，并且确定对象是否包括独立对象。具有突出对象的图像被进一步处理以隔离感兴趣的对象。使用基于过渡映射的检测方法进一步处理没有检测到的突出对象的图像，该方法包括生成转换图。如果从转换图确定对象画像，则进一步处理图像以隔离感兴趣的对象。

9. 发明申请

US20100253817A1 ORIENTATION-BASED APPROACH FOR FORMING A DEMOSAICED IMAGE, AND FOR COLOR CORRECTING AND ZOOMING THE DEMOSAICED IMAGE 有权
标题翻译：基于方向的方法，用于形成一个降解图像，并用于颜色校正和变焦图像
公开(公告)号：US20100253817A1
公开(公告)日：2010-10-07
申请号：US12418207
申请日：2009-04-03
申请人： Gazi Ali , Ming-Chang Liu , Ximin Zhang
发明人： Gazi Ali , Ming-Chang Liu , Ximin Zhang
IPC分类号： H04N5/335 , G06K9/00
CPC分类号： H04N9/045 , G06T3/4015 , H04N2209/045
摘要： A method and apparatus for forming a demosaiced image from a color-filter-array (“CFA”) image is provided. The CFA image comprises a first set of pixels colored according to a first (e.g., a green) color channel, a second set of pixels colored according to a second (e.g., a red) color channel and a third set of pixels colored according to a third (e.g., blue) color channel. The method may include obtaining an orientation map, which includes, for each pixel of the color-filter-array image, an indicator of orientation of an edge bounding such pixel. The method may further include interpolating the first color channel at the second and third sets of pixels as a function of the orientation map so as to form a fourth set of pixels. The method may also include interpolating the second color channel at the first and third sets of pixels as a function of the orientation map and the fourth set of pixels; and interpolating the third color channel at the first and second sets of pixels as a function of the orientation map and the fourth set of pixels.
摘要翻译：提供了一种用于从彩色滤光片阵列（“CFA”）图像形成去马赛克图像的方法和装置。 CFA图像包括根据第一（例如，绿色）颜色通道着色的第一组像素，根据第二（例如，红色）颜色通道着色的第二组像素，以及根据第第三（例如蓝色）彩色通道。该方法可以包括获得方位图，其包括对于彩色滤波器阵列图像的每个像素的边界边界的方向的指示符。该方法可以进一步包括根据取向图来插值第二和第三组像素处的第一颜色通道，以便形成第四组像素。该方法还可以包括根据取向图和第四组像素来内插第一和第三组像素处的第二颜色通道; 以及作为所述取向图和所述第四组像素的函数，在所述第一和第二像素组处插入所述第三颜色通道。

10. 发明申请

US20100111435A1 VIDEO SYSTEM WITH BLOCKING ARTIFACT FILTERING 失效
标题翻译：具有阻塞文艺过滤的视频系统
公开(公告)号：US20100111435A1
公开(公告)日：2010-05-06
申请号：US12266551
申请日：2008-11-06
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： H04N19/117 , H04N19/14 , H04N19/176 , H04N19/61 , H04N19/86
摘要： A video system includes: analyzing video data, having a block; performing a transition change detection for determining a spatial intensity transition within the block; performing a block-wise similarity measurement on the block in the video data for identifying a blocking artifact; and filtering with a two dimensional cross filter every pixel in the block for removing the blocking artifact.
摘要翻译：视频系统包括：分析具有块的视频数据; 执行用于确定所述块内的空间强度转换的转变变化检测; 对所述视频数据中的块进行块式相似度测量，以识别块伪影; 并使用块中的每个像素对二维交叉滤波进行滤波，以消除块伪影。

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