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。

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。

公开(公告)号：US09769472B2

公开(公告)日：2017-09-19

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 ,  H04N19/176 ,  H04N19/147 ,  H04N19/11 ,  H04N19/132 ,  H04N19/70 ,  H04N19/119 ,  H04N19/122 ,  H04N19/593 ,  H04N19/33

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.

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。

公开(公告)号：US09560347B2

公开(公告)日：2017-01-31

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： H04B1/66 ,  G06K9/36 ,  H04N19/122 ,  H04N19/124 ,  H04N19/115 ,  H04N7/26 ,  H04N11/02 ,  G06K9/32 ,  H04N19/196 ,  H04N19/176 ,  H04N19/70 ,  H04N19/60 ,  H04N19/126 ,  H04N19/18 ,  H04N19/80

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 process transform blocks according to quantization matrices in a video coding system. 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 also enables the quantization matrix representation.

摘要翻译： 一种方法和系统处理根据视频编码系统中的量化矩阵来变换块。 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。 语法设计还支持量化矩阵表示。

公开(公告)号：US20140211850A1

公开(公告)日：2014-07-31

申请号：US14342357

申请日：2012-08-29

申请人： Ximin Zhang ,  Shan Liu

发明人： Ximin Zhang ,  Shan Liu

IPC分类号： H04N19/157 ,  H04N19/66 ,  H04N19/169 ,  H04N19/174

CPC分类号： H04N19/159 ,  H04N19/13 ,  H04N19/174 ,  H04N19/70

摘要： A method and apparatus for coding of syntax elements are disclosed to allow prediction units in P and B slices to share the same syntax coding table. In one embodiment according to the present invention, the method and apparatus coding of syntax elements selectively apply a syntax coding table to encode or decode the syntax element associated with the partition mode of a coding unit of a picture region according to the slice type of the picture region. A first syntax coding table is used to process the syntax element if the slice type is an I mode and a second syntax coding table is used to process the syntax element if the slice type is not an I mode.

摘要翻译： 公开了用于编码语法元素的方法和装置，以允许P和B片段中的预测单元共享相同的语法编码表。 在根据本发明的一个实施例中，语法元素的方法和装置编码选择性地应用语法编码表，以根据图像区域的切片类型来编码或解码与图像区域的编码单元的分割模式相关联的语法元素 图片区域。 如果片类型是I模式，则第一语法编码表用于处理语法元素，并且如果片类型不是I模式，则使用第二语法编码表来处理语法元素。

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。

公开(公告)号：US20130266064A1

公开(公告)日：2013-10-10

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： H04N7/32

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。

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。

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。