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21. 发明申请

WO2012092841A1 METHOD OF FILTER-UNIT BASED IN-LOOP FILTERING 审中-公开
标题翻译：基于滤波器单元的环路滤波方法
公开(公告)号：WO2012092841A1
公开(公告)日：2012-07-12
申请号：PCT/CN2011/085170
申请日：2011-12-31
申请人： MEDIATEK INC. , CHEN, Ching-Yeh , FU, Chih-Ming , TSAI, Chia-Yang , HUANG, Yu-Wen , LEI, Shaw-Min
发明人： CHEN, Ching-Yeh , FU, Chih-Ming , TSAI, Chia-Yang , HUANG, Yu-Wen , LEI, Shaw-Min
IPC分类号： H04N7/24
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。

22. 发明申请

WO2012045269A1 METHOD AND APPARATUS OF REGION-BASED ADAPTIVE LOOP FILTERING 审中-公开
标题翻译：基于区域的自适应环路滤波的方法与装置
公开(公告)号：WO2012045269A1
公开(公告)日：2012-04-12
申请号：PCT/CN2011/080408
申请日：2011-09-30
申请人： MEDIATEK INC. , CHEN, Ching-Yeh , FU, Chih-Ming , TSAI, Chia-Yang , HUANG, Yu-Wen , LEI, Shaw-Min
发明人： CHEN, Ching-Yeh , FU, Chih-Ming , TSAI, Chia-Yang , HUANG, Yu-Wen , LEI, Shaw-Min
IPC分类号： H04N7/26
CPC分类号： H04N19/82 , H04N19/117 , H04N19/147 , H04N19/156 , H04N19/17 , H04N19/176 , H04N19/182 , H04N19/463 , H04N19/61 , H04N19/70
摘要： In a block-based motion compensated system, coding noises may arise due to lossy operations. Adaptive loop filter (ALF) is a technique used to improve the quality. A pixel adaptive (PA) ALF method was developed that uses the Sum-modified Laplacian Measure (SLM) to classify pixels and applies a respective ALF filter to each pixel according to the SLM. While the PA ALF achieves better performance over a conventional single filter (SF) based ALF, the PA ALF causes higher complexity and consumes more power due to the high complexity and per-pixel filter switching. Accordingly region based ALF scheme is disclosed which allows adaptive filter selection on a region by region basis and does not require per-pixel filter switching. In one embodiment according to the present invention, a picture is divided into MxN regions. The region based ALF also allows region merging for the MxN regions to improve performance. In another aspect of the present invention, the optimal ALF design also takes into consideration of the system complexity by using rate-distortion-complexity optimization (RDCO). The RDCO technique is also applied to sample adaptive offset (SAO) design.
摘要翻译：在基于块的运动补偿系统中，由于有损操作可能会产生编码噪声。自适应环路滤波器（ALF）是一种用于提高质量的技术。开发了像素自适应（PA）ALF方法，其使用Sum-Modified Laplacian Measure（SLM）对像素进行分类，并根据SLM对每个像素应用相应的ALF滤波器。虽然PA ALF比传统的基于单滤波器（SF）的ALF具有更好的性能，但是由于高复杂性和每像素滤波器切换，PA ALF引起更高的复杂度并且消耗更多的功率。公开了基于区域的ALF方案，其允许在逐个区域的基础上进行自适应滤波器选择，并且不需要每像素滤波器切换。在根据本发明的一个实施例中，图片被分成M×N个区域。基于区域的ALF还允许区域合并MxN区域以提高性能。在本发明的另一方面，最佳ALF设计还通过使用速率 - 失真 - 复杂度优化（RDCO）来考虑系统的复杂性。 RDCO技术也适用于样本自适应偏移（SAO）设计。

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