公开(公告)号：US10462475B2

公开(公告)日：2019-10-29

申请号：US15534534

申请日：2015-12-16

申请人： Shan Liu ,  Jing Ye ,  Xiaozhong Xu ,  Jungsun Kim ,  Wang-Lin Lai ,  Shaw-Min Lei

发明人： Shan Liu ,  Jing Ye ,  Xiaozhong Xu ,  Jungsun Kim ,  Wang-Lin Lai ,  Shaw-Min Lei

IPC分类号： G06K9/36 ,  H04N19/186 ,  H04N19/70 ,  H04N19/593 ,  H04N19/103 ,  H04N19/119 ,  H04N19/59 ,  H04N11/00

摘要： A method of video coding using palette coding mode for color video in a non-444 color format is disclosed. The non-444 video data can be converted to the 444 format so that the palette designed for the 444 format can be used for the non-444 video data. For the 4:2:0 color format, each chroma sample collocated with corresponding quad luma samples is padded with three chroma samples to form converted quad chroma samples. For the 4:2:0 color format, if a current pixel does not belong to the color palette, one or more escape values are signaled for the current pixel and the escape value associated with the chroma sample of the current pixel for each color component is not signaled for three of the quad chroma sample locations collocated with corresponding quad luma samples.

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：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：US08837592B2

公开(公告)日：2014-09-16

申请号：US12987170

申请日：2011-01-10

申请人： Jian-Liang Lin ,  Yu-Pao Tsai ,  Shaw-Min Lei

发明人： Jian-Liang Lin ,  Yu-Pao Tsai ,  Shaw-Min Lei

IPC分类号： H04N7/26 ,  H04N19/51 ,  H04N19/56

CPC分类号： H04N19/139 ,  H04N19/513 ,  H04N19/52 ,  H04N19/56

摘要： A method for performing local motion vector derivation during video coding of a coding unit includes: processing a plurality of sub-coding units in the coding unit; and performing motion vector prediction of each of the sub-coding units. More particularly, the step of performing motion vector prediction of each of the sub-coding units further includes: deriving a motion vector of a specific sub-coding unit of the sub-coding units by utilizing at least one motion vector of at least one other sub-coding/coding unit. Thus, the method performs motion compensation on the specific sub-coding unit according to the motion vector of the specific sub-coding unit. An associated apparatus is also provided.

摘要翻译： 一种用于在编码单元的视频编码期间执行局部运动矢量导出的方法包括：处理编码单元中的多个子编码单元; 以及对每个子编码单元进行运动矢量预测。 更具体地，执行每个子编码单元的运动矢量预测的步骤还包括：通过利用至少一个其他的至少一个运动矢量来导出子编码单元的特定子编码单元的运动矢量 子编码/编码单元。 因此，该方法根据特定子编码单元的运动矢量对特定子编码单元执行运动补偿。 还提供了一种相关联的装置。

公开(公告)号：US20140119439A1

公开(公告)日：2014-05-01

申请号：US14123201

申请日：2012-04-18

申请人： Mei Guo ,  Xun Guo ,  Shaw-Min Lei

发明人： Mei Guo ,  Xun Guo ,  Shaw-Min Lei

IPC分类号： H04N19/593

CPC分类号： H04N19/105 ,  H04N19/00763 ,  H04N19/11 ,  H04N19/157 ,  H04N19/176 ,  H04N19/463 ,  H04N19/593 ,  H04N19/70 ,  H04N19/91

摘要： Method and apparatus for intra prediction mode coding and decoding are disclosed. In one embodiment, the encoding and decoding process assigns individual indices and codewords to DC mode and Planar mode respectively. The flag is set if the current intra prediction mode is equal to any of one or more neighboring intra prediction modes. Variable length codes are designed for a remaining mode set. If the flag is not set, the currently intra prediction mode is encoded using the variable length codes. In another embodiment, multiple most probable modes are used. If the current intra prediction mode is not equal to any of the multiple most probable modes, the current intra prediction mode is encoded using variable length codes designed for the corresponding remaining modes according the ranking order of the remaining modes.

摘要翻译： 公开了用于帧内预测模式编码和解码的方法和装置。 在一个实施例中，编码和解码过程分别将各个索引和码字分配给DC模式和平面模式。 如果当前帧内预测模式等于一个或多个相邻帧内预测模式中的任何一个，则设置该标志。 可变长度代码是为剩余模式设计的。 如果标志未被设置，则使用可变长度码对当前帧内预测模式进行编码。 在另一个实施例中，使用多个最可能的模式。 如果当前帧内预测模式不等于多个最可能模式中的任何一个，则根据剩余模式的排序顺序，使用针对相应的剩余模式设计的可变长度码来对当前帧内预测模式进行编码。

公开(公告)号：US20140092980A1

公开(公告)日：2014-04-03

申请号：US14123095

申请日：2012-06-20

申请人： Mei Guo ,  Xin Zhao ,  Xun Guo ,  Shaw-Min Lei

发明人： Mei Guo ,  Xin Zhao ,  Xun Guo ,  Shaw-Min Lei

IPC分类号： H04N7/36 ,  H04N7/34

CPC分类号： H04N19/105 ,  H04N19/14 ,  H04N19/157 ,  H04N19/176 ,  H04N19/182 ,  H04N19/593

摘要： A method and apparatus for intra prediction for a current block using directional intra prediction based on neighboring pixels around the current block are disclosed. Embodiment according to the present invention derives the gradient for the current pixel from the neighboring reconstructed pixels along a prediction direction of directional intra prediction. The gradient derived is used to form the final intra prediction. In another embodiment of the present invention, the intra prediction for slant vertical and horizontal directions is derived based on the neighboring reconstructed pixels in a neighboring row adjacent to the top side of the current block and the neighboring reconstructed pixels in a neighboring column adjacent to the left side of the current block.

摘要翻译： 公开了一种使用基于当前块周围的相邻像素的使用定向帧内预测的当前块的帧内预测的方法和装置。 根据本发明的实施例从沿着定向帧内预测的预测方向的相邻重建像素得到当前像素的梯度。 导出的梯度用于形成最终帧内预测。 在本发明的另一个实施例中，基于与当前块的顶侧相邻的相邻行中的相邻重建像素和邻近的相邻列中的邻近重建像素，导出用于倾斜垂直和水平方向的帧内预测 当前块的左侧。

公开(公告)号：US20130322527A1

公开(公告)日：2013-12-05

申请号：US13985779

申请日：2012-12-14

申请人： Xun Guo ,  Shaw-Min Lei

发明人： Xun Guo ,  Shaw-Min Lei

IPC分类号： H04N7/26

CPC分类号： H04N19/124 ,  H03M7/3059 ,  H04N19/126 ,  H04N19/132 ,  H04N19/136 ,  H04N19/146 ,  H04N19/18 ,  H04N19/184 ,  H04N19/44 ,  H04N19/60

摘要： A method and apparatus for clipping a transform coefficient are disclosed. Embodiments according to the present invention avoid overflow of the quantized transform coefficient by clipping the quantization level adaptively after quantization. In one embodiment, the method comprises generating the quantization level for the transform coefficient of a transform unit by quantizing the transform coefficient according to a quantization matrix and quantization parameter. The clipping condition is determined and the quantization level is clipped according to the clipping condition to generate a clipping-processed quantization level. The clipping condition includes a null clipping condition. The quantization level is clipped to fixed-range represented in n bits for the null clipping condition, where n correspond to 8, 16, or 32. The quantization level may also be clipped within a range from −m to m−1 for the null clipping condition, where m may correspond to 128, 32768, or 2147483648.

摘要翻译： 公开了一种用于剪切变换系数的方法和装置。 根据本发明的实施例通过量化后自适应地削减量化电平来避免量化变换系数的溢出。 在一个实施例中，该方法包括通过根据量化矩阵和量化参数量化变换系数来产生变换单元的变换系数的量化级。 确定剪切条件，并根据剪切条件限制量化级别，以产生削波处理的量化级别。 剪切条件包括零剪切条件。 量化电平被削减到用于零削波条件的n位表示的固定范围，其中n对应于8,16或32。量化电平也可以在-m至m-1的范围内被修剪为零 剪切条件，其中m可以对应于128，32768或2147483648。

公开(公告)号：US20120027084A1

公开(公告)日：2012-02-02

申请号：US13017041

申请日：2011-01-30

申请人： Kai Zhang ,  Shaw-Min Lei

发明人： Kai Zhang ,  Shaw-Min Lei

IPC分类号： H04N7/26

CPC分类号： H04N19/93 ,  H04N19/196 ,  H04N19/463

摘要： A method of converting first data into second data includes: determining a target symbol corresponding to the first data by utilizing a determining unit; and generating the second data corresponding to the determined target symbol. One of the first data and the second data is a syntax element, and the other of the first data and the second data is an entropy-coded result of the syntax element. The target symbol corresponding to the first data is determined adaptively according to occurrence probability of candidate syntax element values of the syntax element.

摘要翻译： 将第一数据转换为第二数据的方法包括：利用确定单元确定与第一数据相对应的目标符号; 以及生成对应于所确定的目标符号的第二数据。 第一数据和第二数据之一是语法元素，第一数据和第二数据中的另一个是语法元素的熵编码结果。 根据语法元素的候选语法元素值的出现概率，自适应地确定对应于第一数据的目标符号。

公开(公告)号：US20110222790A1

公开(公告)日：2011-09-15

申请号：US13044489

申请日：2011-03-09

申请人： Kai Zhang ,  Shaw-Min Lei

发明人： Kai Zhang ,  Shaw-Min Lei

IPC分类号： G06K9/36

CPC分类号： H04N19/463 ,  H04N19/11 ,  H04N19/196 ,  H04N19/70

摘要： A method for processing a 2N×2N block under intra-prediction includes: utilizing an intra-prediction unit for performing intra-prediction upon the 2N×2N block by utilizing a plurality of prediction modes, and accordingly generating a plurality of intra-prediction results respectively corresponding to the prediction modes, wherein N is a positive integer greater than four, and a number of the prediction modes is greater than four; and determining a target intra-prediction result from the intra-prediction results.

摘要翻译： 用于在帧内预测中处理2N×2N块的方法包括：利用帧内预测单元，通过利用多个预测模式对2N×2N块进行帧内预测，​​从而生成多个帧内预测结果 分别对应于预测模式，其中N是大于4的正整数，并且预测模式的数量大于4; 以及从所述帧内预测结果确定目标帧内预测结果。