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。

公开(公告)号：US20180108331A1

公开(公告)日：2018-04-19

申请号：US15786240

申请日：2017-10-17

Applicant: MEDIATEK INC.

Inventor： Ping CHAO ,  Ting-An LIN ,  Tung-Hsing WU ,  Kung-Tsun YANG ,  Wan-Yu CHEN ,  Chuang-Chi CHIOU ,  Ping-yao WANG ,  Wei-Gen WU ,  Hsin-Hao CHUNG ,  Chih-Ming WANG ,  Han-Liang CHOU ,  Chung Hsien LEE ,  Yung-Chang CHANG ,  Chi-Cheng JU

IPC: G09G5/393 ,  G09G5/395

Abstract: Aspects of the disclosure provide a method for merging compressed access units according to compression rates and/or positions of the respective compressed access units. The method can include receiving a sequence of compressed access units corresponding to a sequence of raw access units partitioned from an image or a video frame and corresponding to a sequence of memory spaces in a frame buffer, determining a merged access unit including at least two consecutive compressed access units based on compression rates and/or positions of the sequence of compressed access units. The merged access unit is to be stored in the frame buffer with a reduced gap between the at least two consecutive compressed access units compared with storing the at least two consecutive compressed access units in corresponding memory spaces in the sequence of memory spaces.

公开(公告)号：US20170188033A1

公开(公告)日：2017-06-29

申请号：US15386011

申请日：2016-12-21

Applicant: MEDIATEK INC.

Inventor： Hsiu-Yi LIN ,  Ping CHAO ,  Ming-Long WU ,  Chia-Yun CHENG ,  Chih-Ming WANG ,  Yung-Chang CHANG

IPC: H04N19/159 ,  H04L12/26 ,  H04N19/433 ,  H04N19/96 ,  H04N19/91

CPC classification number: H04N19/159 ,  H04L43/0894 ,  H04N19/433 ,  H04N19/91 ,  H04N19/96

Abstract: A method and apparatus of reusing reference data for video decoding are disclosed. Motion information associated with motion vectors for coded blocks processed after the current block are derived without storing decoded residuals associated with the coded blocks. Reuse information regarding reference data required for Inter prediction or Intra block copy of the coded blocks is determined based on the motion information. If the current block is coded in the Inter prediction mode or the Intra block copy mode, whether required reference data for the current block are in an internal memory is determined and the reference data are fetched from an external memory to the internal memory if the required reference data are not stored in the internal memory. The reference data in the internal memory is managed according to the reuse information to reduce data transferring between the external memory and the internal memory.

公开(公告)号：US20180103260A1

公开(公告)日：2018-04-12

申请号：US15578184

申请日：2016-06-03

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ping CHAO ,  Ching-Yeh CHEN ,  Yu-Chen Sun ,  Chih-Ming WANG ,  Chia-Yun Cheng ,  Han-Liang Chou ,  Yu-Wen Huang

IPC: H04N19/423 ,  H04N19/51

CPC classification number: H04N19/186 ,  H04N19/176 ,  H04N19/423 ,  H04N19/433 ,  H04N19/51 ,  H04N19/593 ,  H04N19/70

Abstract: A method and apparatus of sharing an on-chip buffer or cache memory for a video coding system using coding modes including Inter prediction mode or Intra Block Copy (IntraBC) mode are disclosed. At least partial pre-deblocking reconstructed video data of a current picture is stored in an on-chip buffer or cache memory. If the current block is coded using IntraBC mode, the pre-deblocking reconstructed video data of the current picture stored in the on-chip buffer or cache memory are used to derive IntraBC prediction for the current block. In some embodiments, if the current block is coded using Inter prediction mode, Inter reference video data from the previous picture stored in the on-chip buffer or cache memory are used to derive Inter prediction for the current block. In another embodiment, the motion compensation/motion estimation unit is shared by the two modes.

公开(公告)号：US20180107616A1

公开(公告)日：2018-04-19

申请号：US15786908

申请日：2017-10-18

Applicant: MEDIATEK INC.

Inventor： Ping CHAO ,  Chih-Wen YANG ,  Chih-Ming WANG

IPC: G06F13/16 ,  H04N19/423 ,  G09G5/39 ,  H04N1/32 ,  H04N19/59 ,  H04N19/39

Abstract: Aspects of the disclosure provide a method and device for storing an input image into a memory. The disclosure describes allocating one or more frame buffers in the memory. The disclosure further describes dividing the input image into access units corresponding to subsets of the input image and allocating a main portion and a secondary portion in the frame buffer for each of the access units, wherein at least one of the secondary portions is not sequentially located after its respective main portion within the frame buffer. The disclosure also describes compressing the access units into compressed access units and storing each of the compressed access units into its respective main portion, and if a size of the compressed access unit exceeds a size of the main portion, then storing a remainder of the compressed access unit into its respective secondary portion.

公开(公告)号：US20170339432A1

公开(公告)日：2017-11-23

申请号：US15596752

申请日：2017-05-16

Applicant: MEDIATEK INC.

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

IPC: H04N19/82 ,  H04N19/176 ,  H04N19/132

CPC classification number: H04N19/82 ,  H04N19/423 ,  H04N19/439

Abstract: Aspects of the disclosure provide a method and a circuit for adaptive loop filtering in a video coding system. The method can include receiving a block of samples generated from a previous-stage filter circuit in a filter pipeline, the block of samples being one of multiple blocks included in a current picture, performing, in parallel, adaptive loop filter (ALF) processing for multiple target samples in the block of samples, while the previous-stage filter circuit is simultaneously processing another block in the current picture, storing, in a buffer, first samples each having a filter input area defined by a filter shape that includes at least one sample which has not been received, and storing, in the buffer, second samples included in the filter input areas of the first samples.