公开(公告)号：US10306222B2

公开(公告)日：2019-05-28

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 ,  H04N19/105 ,  H04N19/593 ,  H04N19/14 ,  H04N19/182 ,  H04N19/157 ,  H04N19/176

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.

公开(公告)号：US08755435B2

公开(公告)日：2014-06-17

申请号：US13171858

申请日：2011-06-29

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

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

IPC分类号： H04N7/12

CPC分类号： H04N19/182 ,  H04N19/11 ,  H04N19/13 ,  H04N19/186

摘要： A method and apparatus for improved intra chroma prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In practice, a picture is divided into blocks and the intra mode prediction is performed on a block basis. In newer coding systems, multiple intra coding modes such as Vertical mode, Horizontal mode, DC mode and Diagonal mode, have been used to improve the coding efficiency of intra coding. Furthermore, a Luma_mode has also been used in intra prediction of chroma component to further improve the performance in the High Efficiency Video Coding (HEVC) standard being developed. However, the mode selection information for intra prediction has to be conveyed to the decoder for proper operation. Spatial features in a picture often exist in both luma and chroma components. The intra luma prediction mode and intra chroma prediction mode will have high probability to be the same. Accordingly, an embodiment according to the present invention adaptively assigns variable length codes to a set of mode symbols associated with intra chroma prediction by assigning a shortest code to the Luma_mode. Luma_mode not only can be the best luma mode of the corresponding luma block but also can be selected from several corresponding luma modes. The maximum length of chroma prediction codes is decreased by one bit when Luma_mode is equal to one of frequent modes. The coding efficiency of arithmetic coding of chroma prediction codes is further improved by selecting the context upon neighboring blocks.

摘要翻译： 公开了一种用于改进的帧内色度预测模式编码的方法和装置。 帧内预测利用图片内或图片区域内的空间相关性。 实际上，将图像划分成块，并且以块为基础执行帧内模式预测。 在较新的编码系统中，已经使用诸如垂直模式，水平模式，直流模式和对角线模式的多个帧内编码模式来提高帧内编码的编码效率。 此外，Luma_mode也被用于色度分量的帧内预测，​​以进一步提高正在开发的高效率视频编码（HEVC）标准中的性能。 然而，用于帧内预测的模式选择信息必须被传送到解码器以进行正确的操作。 图片中的空间特征通常存在于亮度和色度分量中。 内部亮度预测模式和内部色度预测模式将具有相同的概率。 因此，根据本发明的实施例通过向Luma_mode分配最短代码来自适应地将可变长度代码分配给与帧内色度预测相关联的一组模式符号。 Luma_mode不仅可以是对应亮度块的最佳亮度模式，还可以从几个相应的亮度模式中选择。 当Luma_mode等于频繁模式之一时，色度预测码的最大长度减少一位。 通过选择相邻块的上下文，进一步提高色度预测码的算术编码的编码效率。

公开(公告)号：US09565428B2

公开(公告)日：2017-02-07

申请号：US14123094

申请日：2012-06-15

申请人： Mei Guo ,  Xun Guo ,  Yu-Wen Huang ,  Shaw-Min Lei

发明人： Mei Guo ,  Xun Guo ,  Yu-Wen Huang ,  Shaw-Min Lei

IPC分类号： G06K9/36 ,  G06K9/46 ,  H04N19/105 ,  H04N19/96 ,  H04N19/593 ,  H04N19/136 ,  H04N19/186 ,  H04N19/182 ,  H04N19/433

CPC分类号： H04N19/105 ,  H04N19/136 ,  H04N19/182 ,  H04N19/186 ,  H04N19/433 ,  H04N19/593 ,  H04N19/96

摘要： A method and apparatus for chroma intra prediction for a current chroma block with reduced line memory requirement are disclosed. The chroma intra predictor is derived from reconstructed luma pixels of a current luma block using a model with parameters. In various embodiments according to the present invention, the derivation of the parameters relies on a reconstructed luma pixel set corresponding to neighboring reconstructed luma pixels from causal luma neighboring areas of the current luma block, wherein said causal luma neighboring areas include a first area corresponding to reconstructed luma pixels above a horizontal luma block boundary on a top side of the current luma block, and wherein the reconstructed luma pixels from the first area that are included in the reconstructed luma pixel set are from a luma pixel line immediately above the horizontal luma block boundary.

摘要翻译： 公开了一种具有减少的行存储器要求的当前色度块的色度帧内预测的方法和装置。 色度内预测器是使用具有参数的模型从当前亮度块的重建亮度像素导出的。 在根据本发明的各种实施例中，参数的推导依赖于对应于来自当前亮度块的因果亮度相邻区域的相邻重建亮度像素的重构亮度像素集，其中所述因果亮度相邻区域包括对应于 在当前亮度块的顶侧上的水平亮度块边界上方的重建亮度像素，并且其中包括在重建亮度像素组中的来自第一区域的重建亮度像素来自水平亮度块正上方的亮度像素线 边界。

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：US09596483B2

公开(公告)日：2017-03-14

申请号：US13198697

申请日：2011-08-04

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 ,  H04N19/159 ,  H04N19/196 ,  H04N19/463 ,  H04N19/11

CPC分类号： H04N19/593 ,  H04N19/11 ,  H04N19/159 ,  H04N19/196 ,  H04N19/463

摘要： A method and apparatus for improved intra prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In High-Efficiency Video Coding (HEVC), a coding scheme for the intra luma prediction mode is considered, where the intra prediction mode of a current block is compared with the minimum of two intra luma prediction modes corresponding to two neighboring blocks. If the intra prediction mode of the current block is the same as the minimum of the two neighboring intra luma prediction modes, a single bit is transmitted to indicate the case. Otherwise, information for the current intra prediction mode is transmitted in fixed-length codeword. The present invention provides multiple intra prediction mode candidates based on neighboring intra prediction modes so that there is a better chance for predictor hit. Accordingly, improved coding efficiency is achieved.

摘要翻译： 公开了一种用于改进帧内预测模式编码的方法和装置。 帧内预测利用图片内或图片区域内的空间相关性。 在高效率视频编码（HEVC）中，考虑了用于帧内预测模式的编码方案，其中将当前块的帧内预测模式与对应于两个相邻块的两个内部亮度预测模式的最小值进行比较。 如果当前块的帧内预测模式与两个相邻帧内亮度预测模式的最小值相同，则发送单个位以指示该情况。 否则，以固定长度的码字发送当前帧内预测模式的信息。 本发明提供了基于相邻帧内预测模式的多个帧内预测模式候选，使得预测器命中的机会更好。 因此，实现了改进的编码效率。

公开(公告)号：US10070126B2

公开(公告)日：2018-09-04

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 ,  H04N19/70 ,  H04N19/463 ,  H04N19/91 ,  H04N19/105 ,  H04N19/176 ,  H04N19/11 ,  H04N19/157

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.

公开(公告)号：US20120177112A1

公开(公告)日：2012-07-12

申请号：US13171858

申请日：2011-06-29

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

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

IPC分类号： H04N7/26

CPC分类号： H04N19/182 ,  H04N19/11 ,  H04N19/13 ,  H04N19/186

摘要： A method and apparatus for improved intra chroma prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In practice, a picture is divided into blocks and the intra mode prediction is performed on a block basis. In newer coding systems, multiple intra coding modes such as Vertical mode, Horizontal mode, DC mode and Diagonal mode, have been used to improve the coding efficiency of intra coding. Furthermore, a Luma_mode has also been used in intra prediction of chroma component to further improve the performance in the High Efficiency Video Coding (HEVC) standard being developed. However, the mode selection information for intra prediction has to be conveyed to the decoder for proper operation. Spatial features in a picture often exist in both luma and chroma components. The intra luma prediction mode and intra chroma prediction mode will have high probability to be the same. Accordingly, an embodiment according to the present invention adaptively assigns variable length codes to a set of mode symbols associated with intra chroma prediction by assigning a shortest code to the Luma_mode. Luma_mode not only can be the best luma mode of the corresponding luma block but also can be selected from several corresponding luma modes. The maximum length of chroma prediction codes is decreased by one bit when Luma_mode is equal to one of frequent modes. The coding efficiency of arithmetic coding of chroma prediction codes is further improved by selecting the context upon neighboring blocks.

摘要翻译： 公开了一种用于改进的帧内色度预测模式编码的方法和装置。 帧内预测利用图片内或图片区域内的空间相关性。 实际上，将图像划分成块，并且以块为基础执行帧内模式预测。 在较新的编码系统中，已经使用诸如垂直模式，水平模式，直流模式和对角线模式的多个帧内编码模式来提高帧内编码的编码效率。 此外，Luma_mode也被用于色度分量的帧内预测，​​以进一步提高正在开发的高效率视频编码（HEVC）标准中的性能。 然而，用于帧内预测的模式选择信息必须被传送到解码器以进行正确的操作。 图片中的空间特征通常存在于亮度和色度分量中。 内部亮度预测模式和内部色度预测模式将具有相同的概率。 因此，根据本发明的实施例通过向Luma_mode分配最短代码来自适应地将可变长度代码分配给与帧内色度预测相关联的一组模式符号。 Luma_mode不仅可以是对应亮度块的最佳亮度模式，还可以从几个相应的亮度模式中选择。 当Luma_mode等于频繁模式之一时，色度预测码的最大长度减少一位。 通过选择相邻块的上下文，进一步提高色度预测码的算术编码的编码效率。

公开(公告)号：US20140086502A1

公开(公告)日：2014-03-27

申请号：US14123094

申请日：2012-06-15

申请人： Mei Guo ,  Xun Guo ,  Yu-Wen Huang ,  Shaw-Min Lei

发明人： Mei Guo ,  Xun Guo ,  Yu-Wen Huang ,  Shaw-Min Lei

IPC分类号： H04N7/26

CPC分类号： H04N19/105 ,  H04N19/136 ,  H04N19/182 ,  H04N19/186 ,  H04N19/433 ,  H04N19/593 ,  H04N19/96

摘要： A method and apparatus for chroma intra prediction for a current chroma block with reduced line memory requirement are disclosed. The chroma intra predictor is derived from reconstructed luma pixels of a current luma block using a model with parameters. In various embodiments according to the present invention, the derivation of the parameters relies on a reconstructed luma pixel set corresponding to neighboring reconstructed luma pixels from causal luma neighboring areas of the current luma block, wherein said causal luma neighboring areas include a first area corresponding to reconstructed luma pixels above a horizontal luma block boundary on a top side of the current luma block, and wherein the reconstructed luma pixels from the first area that are included in the reconstructed luma pixel set are from a luma pixel line immediately above the horizontal luma block boundary.

摘要翻译： 公开了一种具有减少的行存储器要求的当前色度块的色度帧内预测的方法和装置。 色度内预测器是使用具有参数的模型从当前亮度块的重建亮度像素导出的。 在根据本发明的各种实施例中，参数的推导依赖于对应于来自当前亮度块的因果亮度相邻区域的相邻重建亮度像素的重构亮度像素集，其中所述因果亮度相邻区域包括对应于 在当前亮度块的顶侧上的水平亮度块边界上方的重建亮度像素，并且其中包括在重建亮度像素组中的来自第一区域的重建亮度像素来自水平亮度块正上方的亮度像素线 边界。

公开(公告)号：US20120177113A1

公开(公告)日：2012-07-12

申请号：US13198697

申请日：2011-08-04

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

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

IPC分类号： H04N7/32

CPC分类号： H04N19/593 ,  H04N19/11 ,  H04N19/159 ,  H04N19/196 ,  H04N19/463

摘要： A method and apparatus for improved intra prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In practice, a picture is divided into blocks and the intra mode prediction is performed on a block basis. In newer coding systems, multiple intra prediction modes such as Vertical mode, Horizontal mode, DC mode and Diagonal mode, have been used to improve the coding efficiency of intra coding. However, the mode selection information for intra prediction has to be conveyed to the decoder for proper operation. In High-Efficiency Video Coding (HEVC), a coding scheme for the intra luma prediction mode is being considered, where the intra prediction mode of a current block is compared with the minimum of two intra luma prediction modes corresponding to two neighboring blocks. If the intra prediction mode of the current block is the same as the minimum of the two neighboring intra luma prediction modes, a single bit is transmitted to indicate the case. Otherwise, information for the current intra prediction mode is transmitted in fixed-length codeword. While the coding scheme for the intra luma prediction mode being considered may not fully exploit the neighboring intra luma prediction modes, it is desirable to further improve the performance. Accordingly, an improved coding scheme for intra prediction mode is disclosed, where more than one intra prediction mode candidates are derived.

摘要翻译： 公开了一种用于改进帧内预测模式编码的方法和装置。 帧内预测利用图片内或图片区域内的空间相关性。 实际上，将图像划分成块，并且以块为基础执行帧内模式预测。 在较新的编码系统中，已经使用诸如垂直模式，水平模式，直流模式和对角线模式的多个帧内预测模式来提高帧内编码的编码效率。 然而，用于帧内预测的模式选择信息必须被传送到解码器以进行正确的操作。 在高效率视频编码（HEVC）中，正在考虑用于内部亮度预测模式的编码方案，其中将当前块的帧内预测模式与对应于两个相邻块的两个内部亮度预测模式的最小值进行比较。 如果当前块的帧内预测模式与两个相邻帧内亮度预测模式的最小值相同，则发送单个位以指示该情况。 否则，以固定长度的码字发送当前帧内预测模式的信息。 虽然正在考虑的内部亮度预测模式的编码方案可能不能充分利用相邻的内部亮度预测模式，但是期望进一步提高性能。 因此，公开了一种用于帧内预测模式的改进编码方案，其中导出多于一个帧内预测模式候选。