公开(公告)号：US20190342582A1

公开(公告)日：2019-11-07

申请号：US16341189

申请日：2017-10-12

Applicant: MEDIATEK INC.

Inventor： Yu-Chi SU ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU ,  Yu-Wen HUANG

IPC: H04N19/86 ,  H04N19/82 ,  H04N19/117 ,  H04N19/176 ,  H04N19/159

Abstract: Methods and apparatus for video coding using ringing smoothing filter (RSF) are disclosed. According to one method, ringing smoothing filter (RSF) is applied to the reconstructed residuals to form smoothed reconstructed residuals or applied to an in-loop-filtered reconstructed block to form a smoothed-filtered reconstructed block for the current block, where the RSF corresponds to an edge-preserving filter. The ringing smoothing filter (RSF) may correspond to a bilateral filter. According to another method, adaptive RSF is derived based on information comprising Intra prediction mode or Inter prediction mode. In yet another method, whether to apply ringing smoothing filter (RSF) to a current block in the current image is determined based on one or more control flags. If the control flag(s) indicates the RSF being on for the current block, the RSF is applied to the current block.

公开(公告)号：US20150365684A1

公开(公告)日：2015-12-17

申请号：US14655447

申请日：2014-03-13

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh CHEN ,  Chih-Wei HSU ,  Chia-Yang TSAI ,  Yu-Wen HUANG

IPC: H04N19/186 ,  H04N19/59 ,  H04N19/182 ,  H04N19/593

CPC classification number: H04N19/186 ,  H04N19/11 ,  H04N19/159 ,  H04N19/182 ,  H04N19/59 ,  H04N19/593 ,  H04N19/597 ,  H04N19/82

Abstract: A method for cross-color Intra prediction using the LM Intra mode using multi-row or multi-column neighboring reconstructed pixels for LM parameter derivation or using only top pixels or left pixels of neighboring pixels is disclosed. Multiple LM Intra modes can be used. For example, three LM Intra modes can be used and the LM parameters for the three LM Intra modes can be determined based on only the top pixels, only the left pixels and both the top pixels and left pixels of neighboring reconstructed pixels respectively. To remove the need for additional buffer requirement for deriving the LM parameters based on using multi-row or multi-column neighboring reconstructed pixels, the current method re-uses existing buffers, where the buffers are used for deblocking. A syntax element can be used to indicate one of the multi-LM modes selected.

Abstract translation: 公开了一种使用LM内部模式使用多行或多列相邻重建像素进行LM参数推导或仅使用相邻像素的顶部像素或左侧像素的交叉颜色帧内预测的方法。 可以使用多个LM内部模式。 例如，可以使用三个LM内部模式，并且可以仅基于顶部像素，仅左侧像素以及相邻重建像素的顶部像素和左侧像素分别确定三个LM内部模式的LM参数。 为了消除对基于使用多行或多列相邻重建像素导出LM参数的附加缓冲区要求的需要，当前方法重新使用现有的缓冲器，其中缓冲器用于去块。 语法元素可用于指示所选择的多LM模式之一。

公开(公告)号：US20130051466A1

公开(公告)日：2013-02-28

申请号：US13662833

申请日：2012-10-29

Applicant: MediaTek Inc.

Inventor： Chih-Wei HSU ,  Yu-Wen HUANG ,  Chih-Hui KUO

IPC: H04N7/32

CPC classification number: H04N19/577 ,  H04N19/51 ,  H04N19/57 ,  H04N19/573

Abstract: A method for video coding is provided. The method includes retrieving a video frame, determining a maximal number of reference frames for the video frame, determining a search window size according to the maximal number of reference frames, and performing prediction encoding on the video frame according to the maximal number of reference frames and the search window size.

Abstract translation: 提供了一种用于视频编码的方法。 该方法包括检索视频帧，确定视频帧的参考帧的最大数量，根据参考帧的最大数量确定搜索窗口大小，并根据参考帧的最大数目对视频帧执行预测编码 和搜索窗口大小。

公开(公告)号：US20250071260A1

公开(公告)日：2025-02-27

申请号：US18727004

申请日：2023-01-10

Applicant: MEDIATEK INC.

Inventor： Chun-Chia CHEN ,  Olena CHUBACH ,  Chih-Wei HSU ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/182

Abstract: A method and apparatus for video coding are disclosed. According to the method, a set of MC (Motion Compensation) candidates with each MC candidate comprising predicted samples for coding boundary pixels of the current block are determined. The set of MC candidates comprises a first candidate, and wherein the first candidate corresponds to a weighted sum of first predicted pixels generated according to first motion information of the current block and second predicted pixels generated according to second motion information of a neighbouring boundary block of the current block. Boundary matching costs associated with the set of MC candidates are determined respectively. A final candidate is determined from the set of MC candidates based on the boundary matching costs. The current block is encoded or decoded using the final candidate.

公开(公告)号：US20250056008A1

公开(公告)日：2025-02-13

申请号：US18720890

申请日：2022-12-20

Applicant: MEDIATEK INC.

Inventor： Yu-Ling HSIAO ,  Olena CHUBACH ,  Chun-Chia CHEN ,  Chia-Ming TSAI ,  Man-Shu CHIANG ,  Chih-Wei HSU ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/159 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

Abstract: A video coding system that uses multiple models to predict chroma samples is provided. The video coding system receives data for a block of pixels to be encoded or decoded as a current block of a current picture of a video. The system constructs two or more chroma prediction models based on luma and chroma samples neighboring the current block. The system applies the two or more chroma prediction models to incoming or reconstructed luma samples of the current block to produce two or more model predictions. The system computes predicted chroma samples by combining the two or more model predictions. The system uses the predicted chroma samples to reconstruct chroma samples of the current block or to encode the current block.

公开(公告)号：US20240357153A1

公开(公告)日：2024-10-24

申请号：US18684787

申请日：2022-08-18

Applicant: MEDIATEK INC.

Inventor： Chun-Chia CHEN ,  Olena CHUBACH ,  Chih-Wei HSU ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/513 ,  G06V10/75 ,  H04N19/139 ,  H04N19/176

CPC classification number: H04N19/513 ,  G06V10/751 ,  H04N19/139 ,  H04N19/176

Abstract: Method and apparatus for template matching with a determined area are disclosed. According to this method, a current template comprising current neighbouring pixels on an above side of the current block, on a left side of the current block, or a combination thereof for a current block is received. An area in a reference picture is then determined, where the reference picture corresponds to a previously coded picture. A matching result between a restricted reference template of a reference block and the current template is then determined, wherein the restricted reference template is generating by using only neighbouring reference pixels of a reference template inside the determined area, the reference template has a same shape as the current template, and a location of the reference template is determined according to a target motion vector (MV) from the current template.

公开(公告)号：US20230388546A1

公开(公告)日：2023-11-30

申请号：US17825269

申请日：2022-05-26

Applicant: MEDIATEK INC.

Inventor： Chih-Hsuan LO ,  Man-Shu CHIANG ,  Chun-Chia CHEN ,  Chih-Wei HSU ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/625 ,  H04N19/122 ,  H04N19/176 ,  H04N19/18 ,  H04N19/124 ,  H04N19/423

CPC classification number: H04N19/625 ,  H04N19/122 ,  H04N19/176 ,  H04N19/18 ,  H04N19/124 ,  H04N19/423

Abstract: Video encoding methods and apparatuses in a video encoding system receive an input residual signal of a current block by a shared transform circuit, apply horizontal transform and vertical transform by a shared transform circuit to generate transform coefficients, apply quantization and inverse quantization to generate recovered transform coefficients, apply inverse vertical transform and inverse horizontal transform to the recovered transform coefficients by the shared transform circuit to generate a reconstructed residual signal for the current block, and encode the current block based on quantized levels of the current block. The shared transform circuit and a coefficient buffer in the folded 4-time transform architecture reuse computation resources in each transform stage. In some embodiments of the folded 4-time transform architecture, a hierarchical design for block size grouping is implemented with fixed throughput for uniform hardware scheduling.

公开(公告)号：US20230345029A1

公开(公告)日：2023-10-26

申请号：US17728392

申请日：2022-04-25

Applicant: MEDIATEK INC.

Inventor： Shih-Chun CHIU ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chun-Chia CHEN ,  Chih-Wei HSU ,  Yu-Wen HUANG

IPC: H04N19/463 ,  H04N19/172 ,  H04N19/52 ,  H04N19/139 ,  H04N19/82 ,  H04N19/117 ,  H04N19/136 ,  H04N19/184

CPC classification number: H04N19/463 ,  H04N19/172 ,  H04N19/52 ,  H04N19/139 ,  H04N19/82 ,  H04N19/117 ,  H04N19/136 ,  H04N19/184

Abstract: Method and apparatus for affine CPMV or ALF refinement are mentioned. According to this method, statistical data associated with the affine CPMV or ALF refinement are collected over a picture area. Updated parameters for the affine CPMV refinement or the ALF refinement are then derived based on the statistical data, where a process to derive the updated parameters includes performing multiplication using a reduced-precision multiplier for the statistical data. The reduced-precision multiplier truncates at least one bit of the mantissa part. In another embodiment, the process to derive the updated parameters includes performing reciprocal for the statistical data using a lookup table with (m−k)-bit input by truncating k bits from the m-bit mantissa part, and contents of the lookup table includes m-bit outputs. m and k are positive integers.

公开(公告)号：US20230328278A1

公开(公告)日：2023-10-12

申请号：US18181858

申请日：2023-03-10

Applicant: MEDIATEK INC.

Inventor： Yu-Cheng LIN ,  Chun-Chia CHEN ,  Tzu-Der CHUANG ,  Chih-Wei HSU ,  Ching-Yeh CHEN

IPC: H04N19/583 ,  H04N19/105 ,  H04N19/176

CPC classification number: H04N19/583 ,  H04N19/176 ,  H04N19/105

Abstract: A method and apparatus for Overlapped Boundary Motion Compensation (OBMC) are provided. According to the method, input data associated with a current block is received, wherein the input data includes pixel data for the current block to be encoded at an encoder side or coded data associated with the current block to be decoded at a decoder side. An inter prediction tool from a set of inter-prediction coding tools is determined for the current block. An OBMC subblock size for the current block is determined based on information related to the inter prediction tool selected for the current block or the inter prediction tool of a neighboring block. Subblock OBMC is applied to a subblock boundary between a neighboring subblock and a current subblock of the current block according to the OBMC subblock size.

公开(公告)号：US20230224455A1

公开(公告)日：2023-07-13

申请号：US18065179

申请日：2022-12-13

Applicant: MEDIATEK INC.

Inventor： Man-Shu CHIANG ,  Chun-Chia CHEN ,  Chih-Wei HSU ,  Shih-Ta HSIANG ,  Ching-Yeh CHEN ,  Tzu-Der CHUANG ,  Yu-Wen HUANG

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/139 ,  H04N19/70

CPC classification number: H04N19/105 ,  H04N19/176 ,  H04N19/139 ,  H04N19/70

Abstract: A method and apparatus for video coding. According to the method, a set of candidates associated with coding modes or mode parameters are determined. Boundary matching costs associated with the set of candidates are determined, where each of the boundary matching costs is determined for one target candidate of the set of candidates. The costs are calculated by using reconstructed or predicted samples of the current block and one or more neighboring blocks of the current block. Each of the boundary matching costs is calculated using one target configuration selected from a plurality of configurations. A final candidate is selected from the set of candidates based on the boundary matching costs. The current block is encoded or decoded using the final candidate.