公开(公告)号：US20190045183A1

公开(公告)日：2019-02-07

申请号：US15757694

申请日：2016-09-05

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh CHEN ,  Chih-Wei HSU ,  Han HUANG ,  Yu-Wen HUANG

IPC: H04N19/109 ,  H04N19/117 ,  H04N19/176 ,  H04N19/577 ,  H04N19/137

Abstract: A method and apparatus of video coding using adaptive Inter prediction are disclosed. A selected Inter prediction process is determined, wherein the selected Inter prediction process selects an Inter prediction filter from multiple Inter prediction filters for the current block depending on first pixel data comprising neighbouring reconstructed pixels (NRP) of the current block. The selected Inter prediction process may be further determined depending on extra motion compensated pixels (EMCP) around a motion-compensated reference block corresponding to the current block. Distortion between the NRP and EMCP can be used to determine the selected Inter prediction filter. The distortion can be calculated using a sum of absolute differences or squared differences between the NRP and the EMCP.

公开(公告)号：US20180359494A1

公开(公告)日：2018-12-13

申请号：US15780544

申请日：2016-12-29

Applicant: MEDIATEK INC.

Inventor： Chih-Wei HSU ,  Ching-Yeh CHEN

IPC: H04N19/96 ,  H04N19/176 ,  H04N19/50 ,  H04N19/66 ,  H04N19/124

CPC classification number: H04N19/96 ,  H04N19/119 ,  H04N19/124 ,  H04N19/176 ,  H04N19/50 ,  H04N19/66 ,  H04N19/70

Abstract: A method and apparatus for partitioning a coding unit into one or more prediction units are disclosed. A prediction binary tree structure corresponding to a binary tree partitioning process for the current block is determined. The current block is partitioned into one or more prediction units according to the prediction binary tree structure. In the encoder side, a prediction process is applied to each prediction unit to generate prediction information for each prediction unit. The prediction information for each prediction unit associated with each prediction unit are encoded into a bitstream for the current block. In the decoder side, each prediction unit is reconstructed based on previous reconstructed data and prediction information of each prediction unit. The prediction information of each prediction unit are derived from the video bitstream. The current block is reconstructed based on the prediction units that are reconstructed according to the prediction binary tree structure derived.

公开(公告)号：US20180242024A1

公开(公告)日：2018-08-23

申请号：US15869759

申请日：2018-01-12

Applicant: MEDIATEK INC.

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

IPC: H04N19/96 ,  H04N19/159 ,  H04N19/176 ,  H04N19/66

CPC classification number: H04N19/96 ,  H04N19/159 ,  H04N19/176 ,  H04N19/463 ,  H04N19/52 ,  H04N19/66

Abstract: Video processing methods and apparatuses for candidate set determination for a current block partitioned from a parent block by quad-tree splitting comprise receiving input data of a current block, determining a candidate set for the current block by prohibiting a spatial candidate derived from any of neighboring blocks partitioned from the same parent block or determining the candidate set for the current block by conducting a pruning process if all the neighboring blocks are coded in Inter prediction and motion information of the neighboring blocks are the same, and encoding or decoding the current block based on the candidate set by selecting one final candidate from the candidate set. The pruning process comprises scanning the candidate set to determine if any candidate equals to the spatial candidate derived from the neighboring blocks, and removing the candidate equals to the spatial candidate from the candidate set.

公开(公告)号：US20180070077A1

公开(公告)日：2018-03-08

申请号：US15795582

申请日：2017-10-27

Applicant: MEDIATEK INC

Inventor： Chia-Yang TSAI ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/105 ,  H04N19/30 ,  H04N19/597 ,  H04N19/593 ,  H04N19/70 ,  H04N19/186 ,  H04N19/136

CPC classification number: H04N19/105 ,  H04N19/136 ,  H04N19/186 ,  H04N19/30 ,  H04N19/593 ,  H04N19/597 ,  H04N19/70

Abstract: A method of inter-layer or inter-view prediction for an inter-layer or inter-view video coding system is disclosed. The method includes receiving a to-be-processed block in the EL or the EV, determining a collocated block in the BL (Base layer) or the BV (Base View), wherein the collocated block is located at a location in the BL or the BV corresponding to the to-be-processed block in the EL (Enhancement Layer)or in the EV (Enhancement view), deriving a predictor for the to-be-processed block in the EL or the EV from the collocated block in the BL or the BV based on pixel data of the BL or the BV, wherein the predictor corresponds to a linear function of pixel data in the collocated block, and encoding or decoding the to-be-processed block in the EL or the EV using the predictor.

公开(公告)号：US20170085906A1

公开(公告)日：2017-03-23

申请号：US15126355

申请日：2015-04-01

Applicant: MediaTek Inc.

Inventor： Ching-Yeh CHEN ,  Tzu-Der CHUANG ,  Yu-Wen HUANG

IPC: H04N19/52 ,  H04N19/159 ,  H04N19/56 ,  H04N19/105

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/56 ,  H04N19/593 ,  H04N19/70

Abstract: A method and apparatus for motion information coding using a refined Merge mode are disclosed. Embodiments of the present invention not only uses the Merge index to indicate the selected Merge candidate, but also refines partial motion information of the selected Merge candidate. An encoder according to the present invention derives a Merge candidate set based on the motion information associated with neighboring blocks. The encoder selects a target Merge candidate from the Merge candidate set and signal a Merge index corresponding to the target Merge candidate. The encoder then predicts a part of the current motion information based on partial motion information associated with the target Merge candidate to generate coded motion information. The process for a decoder incorporating the refined Merge mode is also disclosed.

公开(公告)号：US20160269753A1

公开(公告)日：2016-09-15

申请号：US15034115

申请日：2014-11-10

Applicant: MediaTek Inc.

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

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/68 ,  H04N19/18

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/119 ,  H04N19/14 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/196 ,  H04N19/68 ,  H04N19/70

Abstract: A method of adaptive loop filtering for reconstructed video to improve the performance is disclosed. In one embodiment, a loop filter is selected from one or more candidate filters including a circular symmetrical filter candidate. The candidate filters also may include a ½-symmetry filter candidate and a flag is used to select between different symmetries. In another embodiment, a priority-based block filter merge is disclosed. A filter merge list consisting of no more than a first number of filter candidates selected from corresponding filters used by corresponding set members in the neighboring block set is generated according to a priority order of the set members in the neighboring block set. In yet another embodiment, the loop filter is shared by reconstructed video in multiple image units of a same group. The filter merge groups are identified by differences of consecutive group indices.

Abstract translation: 公开了一种重建视频自适应环路滤波方法，以提高性能。 在一个实施例中，从包括圆形对称滤波器候选的一个或多个候选滤波器中选择一个环路滤波器。 候选滤波器还可以包括½对称滤波器候选，并且标记用于在不同对称之间进行选择。 在另一个实施例中，公开了基于优先级的块过滤器合并。 根据相邻块集合中的集合成员的优先顺序，生成由相邻块集合中的相应集合成员使用的相应过滤器中选择的不超过第一数目的过滤器候选的过滤器合并列表。 在另一个实施例中，环路滤波器由同一组的多个图像单元中的重构视频共享。 过滤器合并组由连续组索引的差异来标识。

公开(公告)号：US20160156938A1

公开(公告)日：2016-06-02

申请号：US15015537

申请日：2016-02-04

Applicant: MediaTek Inc.

Inventor： Chih-Ming FU ,  Ching-Yeh CHEN ,  Chia-Yang TSAI ,  Yu-Wen HUANG ,  Shaw-Min LEI

IPC: H04N19/82 ,  H04N19/157 ,  H04N19/186 ,  H04N19/176 ,  H04N19/463 ,  H04N19/96 ,  H04N19/132 ,  H04N19/117 ,  H04N19/196

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/132 ,  H04N19/157 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/463 ,  H04N19/70 ,  H04N19/96

Abstract: A method and apparatus for processing reconstructed video using in-loop filter in a video coding system are disclosed. The method uses chroma in-loop filter indication to indicate whether chroma components are processed by in-loop filter when the luma in-loop filter indication indicates that in-loop filter processing is applied to the luma component. An additional flag may be used to indicate whether the in-loop filter processing is applied to an entire picture using same in-loop filter information or each block of the picture using individual in-loop filter information. Various embodiments according to the present invention to increase efficiency are disclosed, wherein various aspects of in-loop filter information are taken into consideration for efficient coding such as the property of quadtree-based partition, boundary conditions of a block, in-loop filter information sharing between luma and chroma components, indexing to a set of in-loop filter information, and prediction of in-loop filter information.

Abstract translation: 公开了一种使用视频编码系统中的环路滤波器处理重构视频的方法和装置。 该方法使用色度环路滤波器指示来指示当亮度环路滤波器指示表明将环路滤波处理应用于亮度分量时，是否通过环路滤波器处理色度分量。 可以使用附加标志来指示使用相同的环路滤波器信息或使用各个循环过滤器信息的图像的每个块来将整个图像应用于环路滤波处理。 公开了根据本发明的提高效率的各种实施例，其中考虑到环路滤波器信息的各个方面以进行有效的编码，例如基于四叉树的分区的属性，块的边界条件，环路滤波器信息 在亮度和色度分量之间共享，索引到一组环路滤波器信息，以及对环路滤波器信息的预测。

公开(公告)号：US20150381999A1

公开(公告)日：2015-12-31

申请号：US14767469

申请日：2014-03-12

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/33 ,  H04N19/53 ,  H04N19/61 ,  H04N19/39

CPC classification number: H04N19/33 ,  H04N19/39 ,  H04N19/503 ,  H04N19/513 ,  H04N19/53 ,  H04N19/61

Abstract: A method of inter-layer motion vector scaling using an inter-layer MV scaling factor to reduce computational complexity is disclosed. In one embodiment, image size information regarding the EL picture and the BL picture of the video sequence is received. An inter-layer motion vector (MV) scaling factor is determined based on the image size information. Scaled MVs are determined based on the BL MVs and the inter-layer MV scaling factor. The scaled MVs are then provided for inter-layer coding of the EL picture. In another embodiment, an inter-layer position-mapping scaling factor is determined based on the image size information regarding the EL picture and the BL picture. BL mapping positions corresponding to EL pixel positions are determined based on the EL pixel positions and the inter-layer position-mapping scaling factor. The up-sampled BL picture at the BL mapping positions is then provided for inter-layer coding of the EL picture.

Abstract translation: 公开了使用层间MV缩放因子来降低计算复杂度的层间运动矢量缩放的方法。 在一个实施例中，接收关于视频序列的EL图像和BL图像的图像尺寸信息。 基于图像尺寸信息确定层间运动矢量（MV）缩放因子。 基于BL MV和层间MV缩放因子确定缩放MV。 然后将缩放的MV提供给EL图像的层间编码。 在另一个实施例中，基于关于EL图像和BL图像的图像尺寸信息来确定层间位置映射缩放因子。 基于EL像素位置和层间位置映射缩放因子确定对应于EL像素位置的BL映射位置。 然后，将BL绘图位置的上采样BL图像提供给EL图像的层间编码。

公开(公告)号：US20250113028A1

公开(公告)日：2025-04-03

申请号：US18730932

申请日：2023-01-13

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/70

Abstract: A method and apparatus for video coding are disclosed for the encoder side and the decoder side. According to the method for the decoder side, encoded data associated with a current block is received. A pseudo GPM in a target GPM group for the current block is determined. The current block is divided into one or more subblocks. Assigned MVs (Motion Vectors) of each subblock are determined according to the pseudo GPM. A cost for each GPM in the target GPM group is determined according to decoded data. A selected GPM is determined based on a mode syntax and a reordered target GPM group corresponding to the target GPM group reordered according to the costs, wherein the pseudo GPM is allowed to be different from the selected GPM. The encoded data is decoded using information comprising the selected GPM.

公开(公告)号：US20250080756A1

公开(公告)日：2025-03-06

申请号：US18720901

申请日：2022-12-20

Applicant: MEDIATEK INC.

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

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

Abstract: A method and apparatus for inter prediction in video coding system are disclosed. According to the method, one or more model parameters of one or more cross-color models for the second-color block are determined. Then, cross-color predictors for the second-color block are determined, wherein one cross-color predictor value for the second-color block is generated for each second-color pixel of the second-color block by applying said one or more cross-color models to corresponding reconstructed or predicted first-color pixels. The input data associated with the second-color block is encoded using prediction data comprising the cross-color predictors for the second-color block at the encoder side, or the input data associated with the second-color block is decoded using the prediction data comprising the cross-color predictors for the second-color block at the decoder side.