公开(公告)号：US20160241881A1

公开(公告)日：2016-08-18

申请号：US15015552

申请日：2016-02-04

Applicant: MediaTek Inc.

Inventor： Ping CHAO ,  Huei-Min LIN ,  Chih-Ming WANG ,  Yung-Chang CHANG

IPC: H04N19/80 ,  H04N19/136 ,  H04N19/117 ,  H04N19/176

CPC classification number: H04N19/80 ,  H04N19/117 ,  H04N19/136 ,  H04N19/14 ,  H04N19/176 ,  H04N19/182 ,  H04N19/423 ,  H04N19/82 ,  H04N19/86

Abstract: In a method and apparatus for loop filter processing, a sample adaptive offset (SAO) process is applied to DF (deblocking filter)-processed pixels of current image unit according to one or more SAO parameters. Pixels within SAO parameter boundary of current image unit share the same SAO parameters. SAO parameter boundary is shifted according to a respective goal to reduce both line buffer requirement and parameter switching, where the vertical SAO parameter boundary of current image unit is shifted-left by xs lines from a vertical boundary of current image unit and the horizontal SAO parameter boundary of current image unit is shifted-up by ys lines from a horizontal boundary of current image unit. To reduce the requirement of line buffer, xs is always greater than m that corresponds to the number of pixels at each side of a horizontal edge modified by DF, ys is greater than or equal to 0.

Abstract translation: 在用于环路滤波处理的方法和装置中，根据一个或多个SAO参数将样本自适应偏移（SAO）处理应用于当前图像单元的DF（去块滤波器）处理的像素。 当前图像单位的SAO参数边界内的像素共享相同的SAO参数。 SAO参数边界根据各自的目标移动，以减少线缓冲区要求和参数切换，其中当前图像单元的垂直SAO参数边界从当前图像单元的垂直边界向左移动xs行，并且水平SAO参数 当前图像单元的边界从当前图像单元的水平边界向上移动ys行。 为了减少线缓冲器的要求，xs总是大于m，这对应于由DF修改的水平边缘的每一侧的像素数，ys大于或等于0。

公开(公告)号：US20160241880A1

公开(公告)日：2016-08-18

申请号：US15010062

申请日：2016-01-29

Applicant: MediaTek Inc.

Inventor： Ping CHAO ,  Huei-Min LIN ,  Chih-Ming WANG ,  Yung-Chang CHANG

IPC: H04N19/80

CPC classification number: H04N19/42 ,  H04N19/82 ,  H04N19/86

Abstract: A method and apparatus for loop filter processing of reconstructed video data for a video coding system are disclosed. The system receives reconstructed video data for an image unit. The loop filter processing is applied to reconstructed pixels above a deblocking boundary of the current CTU. In order to reduce line buffer requirement and/or to reduce loop filter switching for image units, the sample adaptive offset (SAO) parameter boundary and spatial-loop-filter restricted boundary for the luma and chroma components are determined by global consideration. In one embodiment, the SAO parameter boundary and the spatial-loop-filter restricted boundary are aligned for the luma and chroma components respectively. In another embodiment, the SAO parameter boundary and the spatial-loop-filter restricted boundary for the luma and chroma components are all aligned.

Abstract translation: 公开了一种用于视频编码系统的重构视频数据的环路滤波处理的方法和装置。 该系统接收用于图像单元的重构的视频数据。 环路滤波处理应用于当前CTU的去块边界以上的重建像素。 为了减少线路缓冲器要求和/或减少图像单元的环路滤波器切换，亮度和色度分量的采样自适应偏移（SAO）参数边界和空间环路滤波器限制边界由全局考虑决定。 在一个实施例中，SAO参数边界和空间环路滤波器限制边界分别对应于亮度和色度分量。 在另一个实施例中，亮度和色度分量的SAO参数边界和空间环路滤波器限制边界都对齐。