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1. 发明授权

US09877019B2 Method of filter-unit based in-loop filtering 有权
公开(公告)号：US09877019B2
公开(公告)日：2018-01-23
申请号：US13825061
申请日：2011-12-31
申请人： Ching-Yeh Chen , Chih-Ming Fu , Chia-Yang Tsai , Yu-Wen Huang , Shaw-Min Lei
发明人： Ching-Yeh Chen , Chih-Ming Fu , Chia-Yang Tsai , Yu-Wen Huang , Shaw-Min Lei
IPC分类号： H04N7/26 , H04N19/117 , H04N19/70 , H04N19/46 , H04N19/82
CPC分类号： H04N19/103 , H04N19/117 , H04N19/46 , H04N19/70 , H04N19/82
摘要： Implementations of the invention are provided in methods for filter-unit based in-loop filtering in a video decoder and encoder. In one implementation, filter parameters are selected from a filter parameter set for each filter based on a filter index. In another implementation, the picture is partitioned into filter units according to filter unit size, which can be selected between a default size and other size. When other size is selected, the filter unit size may be conveyed using direct size information or ratio information. In another implementation, a merge flag and a merge index are used to convey filter unit merge information. A method for filter-unit based in-loop filtering in a video encoder for color video is disclosed. In one embodiment, the method incorporates filter syntax in the video bitstream by interleaving the color-component filter syntax for the FUs.

2. 发明授权

US09055305B2 Apparatus and method of sample adaptive offset for video coding 有权
标题翻译：用于视频编码的采样自适应偏移的装置和方法
公开(公告)号：US09055305B2
公开(公告)日：2015-06-09
申请号：US13158427
申请日：2011-06-12
申请人： Chih-Ming Fu , Ching-Yeh Chen , Chia-Yang Tsai , Yu-Wen Huang , Shaw-Min Lei
发明人： Chih-Ming Fu , Ching-Yeh Chen , Chia-Yang Tsai , Yu-Wen Huang , Shaw-Min Lei
IPC分类号： H04N7/26 , H04N19/61 , H04N19/82 , H04N19/85
CPC分类号： H04N19/61 , H04N19/117 , H04N19/119 , H04N19/14 , H04N19/162 , H04N19/167 , H04N19/174 , H04N19/179 , H04N19/182 , H04N19/192 , H04N19/439 , H04N19/70 , H04N19/82 , H04N19/85 , H04N19/96
摘要： An apparatus and method for sample adaptive offset to restore intensity shift of processed video data are described. In a video coding system, the video data are subject to various processing such as prediction, transformation, quantization, deblocking, and adaptive loop filtering. Along the processing path in the video coding system, certain characteristics of the processed video data may be altered from the original video data due to the operations applied to video data. For example, the mean value of the processed video may be shifted. Therefore, the pixel intensity shift has to be carefully compensated or restored to alleviate the artifacts. Accordingly a sample adaptive offset scheme is disclosed that can take into consideration of the dynamic characteristics within a frame using a region partition scheme. Furthermore, the sample adaptive offset scheme also supports multiple SAO types that can be tailored to the characteristics of processed video data and achieve better quality.
摘要翻译：描述了用于恢复处理的视频数据的强度偏移的采样自适应偏移的装置和方法。在视频编码系统中，视频数据经历诸如预测，变换，量化，去块和自适应环路滤波的各种处理。沿着视频编码系统中的处理路径，由于应用于视频数据的操作，处理的视频数据的某些特性可能会从原始视频数据中改变。例如，处理的视频的平均值可能被移位。因此，必须仔细地补偿或恢复像素强度偏移以减轻伪影。因此，公开了可以使用区域分区方案考虑帧内的动态特性的样本自适应偏移方案。此外，样本自适应偏移方案还支持多种SAO类型，可以根据处理的视频数据的特性进行调整，并实现更好的质量。

3. 发明申请

US20130128986A1 Method and Apparatus of Slice Boundary Padding for Loop Filtering 审中-公开
标题翻译：用于环路滤波的切片边界填充的方法和装置
公开(公告)号：US20130128986A1
公开(公告)日：2013-05-23
申请号：US13348488
申请日：2012-01-11
申请人： Chia-Yang Tsai , Yu-Wen Huang , Ching-Yeh Chen , Chih-Ming Fu , Chih-Wei Hsu , Shaw-Min Lei
发明人： Chia-Yang Tsai , Yu-Wen Huang , Ching-Yeh Chen , Chih-Ming Fu , Chih-Wei Hsu , Shaw-Min Lei
IPC分类号： H04N7/26
CPC分类号： H04N19/167 , H04N19/117 , H04N19/174 , H04N19/182 , H04N19/61 , H04N19/82
摘要： A method and apparatus for video processing of reconstructed video in a reconstruction loop are disclosed. An embodiment according to the present invention performs padding for the blocks in the slice boundaries according to a processing order. Each of the one or more reconstructed blocks at slice boundaries is padded according to a padding order. In-loop filtering is applied to the reconstructed slice according to the processing order, wherein the reconstructed slice is filtered by referencing the one or more padded blocks. The padding order can be vertical-edge first and then horizontal-edge, or horizontal-edge first and then vertical-edge. Various embodiments are disclosed regarding whether padding for a later padded block in the processing order is skipped or not in the overlapped area. The present invention is also applied to adaptation blocks for block-based in-loop filtering in slice boundaries.
摘要翻译：公开了一种用于在重构环路中重构视频的视频处理的方法和装置。根据本发明的实施例根据处理顺序对切片边界中的块执行填充。根据填充顺序对切片边界处的一个或多个重构块中的每一个进行填充。根据处理顺序对重构片段进行环路滤波，其中通过参考一个或多个填充块来过滤重建片段。填充顺序可以先是垂直边缘，然后是水平边缘，或者先沿着水平边缘，然后是垂直边缘。公开了关于在重叠区域中是否跳过处理顺序中的稍后填充块的填充的各种实施例。本发明还应用于片边界中基于块的循环过滤的适配块。

4. 发明申请

US20120207227A1 Method and Apparatus for Slice Common Information Sharing 有权
标题翻译：切片常用信息共享的方法和装置
公开(公告)号：US20120207227A1
公开(公告)日：2012-08-16
申请号：US13298294
申请日：2011-11-17
申请人： Chia-Yang Tsai , Chih-Wei Hsu , Yu-Wen Huang , Ching-Yeh Chen , Chih-Ming Fu , Shaw-Min Lei
发明人： Chia-Yang Tsai , Chih-Wei Hsu , Yu-Wen Huang , Ching-Yeh Chen , Chih-Ming Fu , Shaw-Min Lei
IPC分类号： H04N7/26
CPC分类号： H04N19/117 , H04N19/136 , H04N19/172 , H04N19/174 , H04N19/70 , H04N19/82 , H04N19/86
摘要： A method and apparatus for sharing information in a video coding system are disclosed. Embodiments according to the present invention use an information sharing flag to determine whether to share in-loop filter information in the picture level. The information sharing flag may be incorporated in the sequence level, the picture level or the slice level to indicate whether information sharing is enabled. Multiple information sharing flags may also be used to adaptively control information sharing. Furthermore, method and apparatus of using multiple Adaptation Parameter Sets (APSs) for information sharing of in-loop filters are disclosed. APS identifiers of in-loop filters may be incorporated in the slice header to allow each of the in-loop filters select respective filter information from the multiple APSs. A flag is incorporated in SPS to indicate whether multiple APS or single APS is used. Various exemplary syntax designs are disclosed to illustrate information sharing.
摘要翻译：公开了一种用于在视频编码系统中共享信息的方法和装置。根据本发明的实施例使用信息共享标志来确定是否在图像级别中共享环路滤波器信息。信息共享标志可以并入在序列级别，画面级或片级中，以指示是否启用信息共享。也可以使用多个信息共享标志来自适应地控制信息共享。此外，公开了使用多个适配参数集（APS）进行环路滤波器信息共享的方法和装置。环路滤波器的APS标识符可以并入片标头中，以允许每个环路滤波器从多个APS中选择相应的滤波器信息。 SPS中包含一个标志，以指示是否使用多个APS或单个APS。公开各种示例性语法设计来说明信息共享。

5. 发明申请

US20120177107A1 Apparatus and Method of Sample Adaptive Offset for Video Coding 有权
标题翻译：用于视频编码的样本自适应偏移的装置和方法
公开(公告)号：US20120177107A1
公开(公告)日：2012-07-12
申请号：US13158427
申请日：2011-06-12
申请人： Chih-Ming Fu , Ching-Yeh Chen , Chia-Yang Tsai , Yu-Wen Huang , Shaw-Min Lei
发明人： Chih-Ming Fu , Ching-Yeh Chen , Chia-Yang Tsai , Yu-Wen Huang , Shaw-Min Lei
IPC分类号： H04N7/26 , H04N7/40
CPC分类号： H04N19/61 , H04N19/117 , H04N19/119 , H04N19/14 , H04N19/162 , H04N19/167 , H04N19/174 , H04N19/179 , H04N19/182 , H04N19/192 , H04N19/439 , H04N19/70 , H04N19/82 , H04N19/85 , H04N19/96
摘要： An apparatus and method for sample adaptive offset to restore intensity shift of processed video data are described. In a video coding system, the video data are subject to various processing such as prediction, transformation, quantization, deblocking, and adaptive loop filtering. Along the processing path in the video coding system, certain characteristics of the processed video data may be altered from the original video data due to the operations applied to video data. For example, the mean value of the processed video may be shifted. Therefore, the pixel intensity shift has to be carefully compensated or restored to alleviate the artifacts. Accordingly a sample adaptive offset scheme is disclosed that can take into consideration of the dynamic characteristics within a frame using a region partition scheme. Furthermore, the sample adaptive offset scheme also supports multiple SAO types that can be tailored to the characteristics of processed video data and achieve better quality.
摘要翻译：描述了用于恢复处理的视频数据的强度偏移的采样自适应偏移的装置和方法。在视频编码系统中，视频数据经历诸如预测，变换，量化，去块和自适应环路滤波的各种处理。沿着视频编码系统中的处理路径，由于应用于视频数据的操作，处理的视频数据的某些特性可能会从原始视频数据中改变。例如，处理的视频的平均值可能被移位。因此，必须仔细地补偿或恢复像素强度偏移以减轻伪影。因此，公开了可以使用区域分区方案考虑帧内的动态特性的样本自适应偏移方案。此外，样本自适应偏移方案还支持多种SAO类型，可以根据处理的视频数据的特性进行调整，并实现更好的质量。

6. 发明申请

US20120177103A1 APPARATUS AND METHOD OF EFFICIENT SAMPLE ADAPTIVE OFFSET 有权
标题翻译：装置和方法的有效样品自适应偏差
公开(公告)号：US20120177103A1
公开(公告)日：2012-07-12
申请号：US13177424
申请日：2011-07-06
申请人： Chih-Ming Fu , Ching-Yeh Chen , Chia-Yang Tsai , Yu-Wen Huang , Shaw-Min Lei
发明人： Chih-Ming Fu , Ching-Yeh Chen , Chia-Yang Tsai , Yu-Wen Huang , Shaw-Min Lei
IPC分类号： H04N7/26
CPC分类号： H04N19/117 , H04N19/136 , H04N19/14 , H04N19/147 , H04N19/176 , H04N19/182 , H04N19/61 , H04N19/82 , H04N19/85 , H04N19/86
摘要： For sample adaptive offset, classification may be used to classify the pixels into multiple categories and pixels in each category are offset compensated using an offset value for the category. The classification may be based on values of the current pixel and its neighboring pixels before SAO compensation. Therefore, the SAO compensated pixel cannot be written back to the current pixel location until the category for all pixels are determined. An embodiment of the present invention stores the relation between the current pixel and said one or more neighboring pixels so that the SAO compensated current pixel can replace the current pixel without buffering the to-be-processed pixels for classification. The SAO process may be performed on a region by region basis to adapt to the local characteristics of the picture. Rate-distortion optimization (RDO) is often used to guide the mode decision, such as region splitting/region merging decision. Computations associated with the RDO process usually are very computational intensive. Accordingly, distortion reduction estimation is developed which can substantially reduce the required computation associated with RDO.
摘要翻译：对于样本自适应偏移，可以使用分类来将像素分类为多个类别，并且使用该类别的偏移值来对每个类别中的像素进行偏移补偿。分类可以基于SAO补偿之前的当前像素及其相邻像素的值。因此，在确定所有像素的类别之前，SAO补偿像素不能被写回到当前像素位置。本发明的实施例存储当前像素和所述一个或多个相邻像素之间的关系，使得SAO补偿的当前像素可以代替当前像素，而不缓冲待处理像素用于分类。可以在逐个区域的基础上执行SAO处理，以适应图像的局部特征。速率失真优化（RDO）经常用于指导模式决策，如区域分割/区域合并决策。与RDO过程相关的计算通常是非常计算密集型的。因此，开发了可以显着减少与RDO相关联的所需计算的失真减小估计。

7. 发明申请

US20120082241A1 Method and Apparatus of Adaptive Loop Filtering 有权
标题翻译：自适应环路滤波的方法与装置
公开(公告)号：US20120082241A1
公开(公告)日：2012-04-05
申请号：US13216242
申请日：2011-08-24
申请人： Chia-Yang Tsai , Chih-Ming Fu , Ching-Yeh Chen , Yu-Wen Huang , Shaw-Min Lei
发明人： Chia-Yang Tsai , Chih-Ming Fu , Ching-Yeh Chen , Yu-Wen Huang , Shaw-Min Lei
IPC分类号： H04N7/26
CPC分类号： H04N19/82 , H04N19/117 , H04N19/119 , H04N19/147 , H04N19/17 , H04N19/176 , H04N19/182 , H04N19/439 , H04N19/80
摘要： A method and apparatus for processing in-loop reconstructed video using an in-loop filter is disclosed. In the recent HEVC development, adaptive loop filtering (ALF) is being adopted to process in-loop reconstruction video data, where ALF can be selectively turned ON or OFF for each block in a frame or a slice. An advanced ALF is disclosed later that allows a choice of multiple filter sets that can be applied to the reconstructed video data adaptively. In the present disclosure, pixels of the in-loop reconstructed video data are divided into a plurality of to-be-filtered regions, and an in-loop filter from a filter set is determined for each to-be-filtered region based on a rate-distortion optimization procedure. According to one embodiment of the present invention, computation of cost function associated with the rate-distortion optimization procedure is related to correlation values associated with original video data and the in-loop reconstructed video data. Furthermore, the correlation values can be shared by the multiple candidate filters during the rate-distortion optimization procedure for said each to-be-filtered region. In another embodiment, the correlation values can be shared by multiple candidate to-be-filtered regions of an area of the in-loop reconstructed video data during the rate-distortion optimization procedure for the area of the in-loop reconstructed video data.
摘要翻译：公开了一种使用环路滤波器来处理环路重建视频的方法和装置。在最近的HEVC开发中，正在采用自适应环路滤波（ALF）来处理环路重建视频数据，其中ALF可以针对帧或片中的每个块选择性地打开或关闭。稍后公开了一种先进的ALF，其允许选择可以自适应地应用于重建的视频数据的多个滤波器组。在本公开中，环路内重建的视频数据的像素被划分成多个要被滤波的区域，并且基于一个滤波器组确定针对每个被过滤区域的滤波器组的环路滤波器速率失真优化程序。根据本发明的一个实施例，与速率失真优化过程相关联的成本函数的计算与与原始视频数据和环路内重建视频数据相关联的相关值相关。此外，在针对所述每个待被过滤的区域的速率失真优化过程期间，相关值可由多个候选滤波器共享。在另一个实施例中，相关值可以在针对环路内重建的视频数据的区域的速率失真优化过程期间由循环内重构视频数据的区域的多个候选被被滤波区域共享。

8. 发明授权

US09872015B2 Method and apparatus for improved in-loop filtering 有权
公开(公告)号：US09872015B2
公开(公告)日：2018-01-16
申请号：US13992472
申请日：2012-04-20
申请人： Chih-Ming Fu , Ching-Yeh Chen , Chia-Yang Tsai , Yu-Wen Huang , Shaw-Min Lei
发明人： Chih-Ming Fu , Ching-Yeh Chen , Chia-Yang Tsai , Yu-Wen Huang , Shaw-Min Lei
IPC分类号： H04N7/12 , H04N11/02 , H04N11/04 , H04N19/117 , H04N19/70 , H04N19/177 , H04N19/463 , H04N19/82
CPC分类号： H04N19/169 , H04N19/117 , H04N19/177 , H04N19/463 , H04N19/70 , H04N19/82
摘要： Video decoding and encoding with in-loop processing of reconstructed video are disclosed. At the decoder side, a flag is received from the video bitstream and according to the flag, information associated with in-loop filter parameters is received either from a data payload in the video bitstream to be shared by two or more coding blocks or individual coding block data in the video bitstream. At the encoder side, information associated with the in-loop filter parameters is incorporated either in a data payload in a video bitstream to be shared by two or more coding blocks or interleaved with individual coding block data in the video bitstream according to a flag. The data payload in the video bitstream is in a picture level, Adaptation Parameter Set (APS), or a slice header.

9. 发明授权

US09813738B2 Method and apparatus of adaptive loop filtering 有权
公开(公告)号：US09813738B2
公开(公告)日：2017-11-07
申请号：US13216242
申请日：2011-08-24
申请人： Chia-Yang Tsai , Chih-Ming Fu , Ching-Yeh Chen , Yu-Wen Huang , Shaw-Min Lei
发明人： Chia-Yang Tsai , Chih-Ming Fu , Ching-Yeh Chen , Yu-Wen Huang , Shaw-Min Lei
IPC分类号： H04N19/82 , H04N19/42 , H04N19/80 , H04N19/147 , H04N19/176 , H04N19/17 , H04N19/182 , H04N19/119 , H04N19/117
CPC分类号： H04N19/82 , H04N19/117 , H04N19/119 , H04N19/147 , H04N19/17 , H04N19/176 , H04N19/182 , H04N19/439 , H04N19/80
摘要： A method and apparatus for processing in-loop reconstructed video using an in-loop filter is disclosed. In the recent HEVC development, adaptive loop filtering (ALF) is being adopted to process in-loop reconstruction video data, where ALF can be selectively turned ON or OFF for each block in a frame or a slice. An advanced ALF is disclosed later that allows a choice of multiple filter sets that can be applied to the reconstructed video data adaptively. In the present disclosure, pixels of the in-loop reconstructed video data are divided into a plurality of to-be-filtered regions, and an in-loop filter from a filter set is determined for each to-be-filtered region based on a rate-distortion optimization procedure. According to one embodiment of the present invention, computation of cost function associated with the rate-distortion optimization procedure is related to correlation values associated with original video data and the in-loop reconstructed video data. Furthermore, the correlation values can be shared by the multiple candidate filters during the rate-distortion optimization procedure for said each to-be-filtered region. In another embodiment, the correlation values can be shared by multiple candidate to-be-filtered regions of an area of the in-loop reconstructed video data during the rate-distortion optimization procedure for the area of the in-loop reconstructed video data.

10. 发明申请

US20130215959A1 Method of Filter-Unit Based In-Loop Filtering 有权
标题翻译：基于滤波单元的环路滤波方法
公开(公告)号：US20130215959A1
公开(公告)日：2013-08-22
申请号：US13825061
申请日：2011-12-31
申请人： Ching-Yeh Chen , Chih-Ming Fu , Chia-Yang Tsai , Yu-Wen Huang , Shaw-Min Lei
发明人： Ching-Yeh Chen , Chih-Ming Fu , Chia-Yang Tsai , Yu-Wen Huang , Shaw-Min Lei
IPC分类号： H04N7/26
CPC分类号： H04N19/103 , H04N19/117 , H04N19/46 , H04N19/70 , H04N19/82
摘要： Methods for filter-unit based in-loop filtering in a video decoder and encoder are disclosed. In one embodiment, filter parameters are selected from a filter parameter set for each filter based on a filter index. In another embodiment, the picture is partitioned into filter units according to filter unit size, which can be selected between a default size and other size. When other size is selected, the filter unit size may be conveyed using direct size information or ratio information. In another embodiment, a merge flag and a merge index are used to convey filter unit merge information. A method for filter-unit based in-loop filtering in a video encoder for color video is disclosed. In one embodiment, the method incorporates filter syntax in the video bitstream by interleaving the color-component filter syntax for the FUs.
摘要翻译：公开了一种视频解码器和编码器中基于滤波器单元的环路滤波方法。在一个实施例中，基于滤波器索引从针对每个滤波器的滤波器参数集中选择滤波器参数。在另一个实施例中，根据滤波器单元尺寸将图像划分为滤波器单元，其可以在默认尺寸和其它尺寸之间进行选择。当选择其他尺寸时，可以使用直接尺寸信息或比率信息来传送过滤器单元尺寸。在另一个实施例中，使用合并标志和合并索引来传送过滤器单元合并信息。公开了一种用于彩色视频的视频编码器中的基于滤波器单元的环路滤波的方法。在一个实施例中，该方法通过交织FU的颜色分量滤波器语法来在视频比特流中包含滤波器语法。

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