公开(公告)号：US20200077088A1

公开(公告)日：2020-03-05

申请号：US16677132

申请日：2019-11-07

Applicant: Mediatek Inc.

Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Chih-Wei Hsu ,  Yu-Wen Huang ,  Jian-Liang Lin ,  Yu-Chen Sun ,  Yi-Ting Shen

IPC: H04N19/105 ,  H04N19/52 ,  H04N19/176 ,  H04N19/567 ,  H04N19/57

Abstract: Method and apparatus of video coding using decoder derived motion information based on bilateral matching or template matching are disclosed. According to one method, an initial motion vector (MV) index is signalled in a video bitstream at an encoder side or determined from the video bitstream at a decoder side. A selected MV is then derived using bilateral matching, template matching or both to refine an initial MV associated with the initial MV index. In another method, when both MVs for list 0 and list 1 exist in template matching, the smallest-cost MV between the two MVs may be used for uni-prediction template matching if the cost is lower than the bi-prediction template matching. According to yet another method, the refinement of the MV search is dependent on the block size. According to yet another method, merge candidate MV pair is always used for bilateral matching or template matching.

公开(公告)号：US10440375B2

公开(公告)日：2019-10-08

申请号：US15919008

申请日：2018-03-12

Applicant: MediaTek Inc.

Inventor： Tzu-Der Chuang ,  Zhenzhong Chen ,  Shan Liu ,  Ching-Yeh Chen ,  Chih-Wei Hsu

IPC: H04N19/30 ,  H04N19/52 ,  H04N19/12 ,  H04N19/187 ,  H04N19/50 ,  H04N19/61 ,  H04N19/105 ,  H04N19/176 ,  H04N19/134

Abstract: Methods of adaptive transform type based on transform unit (TU) size for enhancement layer (EL) coding and multiple motion candidates for EL coding based on corresponding base layer (BL) video data are provided. One method selects a transform type from multiple allowable transform types based on the TU size and applies the selected transform type to the transform units of the inter-layer prediction processed data. Another method derives multiple motion candidates for the EL video data coded in Merge mode or Inter mode based on motion information associated with the corresponding BL video data.

公开(公告)号：US20190238890A1

公开(公告)日：2019-08-01

申请号：US16216650

申请日：2018-12-11

Applicant: MEDIATEK INC.

Inventor： Chia-Ming TSAI ,  Tzu-Der Chuang ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/86 ,  H04N19/80 ,  H04N19/117 ,  H04N19/137 ,  H04N19/132 ,  H04N19/176

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/80

Abstract: A deblocking filtering method includes receiving reconstructed video data associated with a block boundary in a video coding system. The block boundary has N lines of samples crossing the block boundary from a P side to a Q side of the boundary. The method further includes determining whether to apply a first filter set to reduce block artifacts at the block boundary based on whether a first inter-side difference of a first line of the N lines of samples is greater than an inter-side difference threshold, determining a filter length of a filter in the first filter set based on a first side length of the P side, and a second side length of the Q side when it is determined to apply the first filter set, and applying at least one filter in the first filter set with the determined filter length on the block boundary.

公开(公告)号：US10230961B2

公开(公告)日：2019-03-12

申请号：US15611841

申请日：2017-06-02

Applicant: MEDIATEK INC.

Inventor： Shan Liu ,  Jing Ye ,  Xiaozhong Xu ,  Tzu-Der Chuang ,  Ching-Yeh Chen

IPC: H04N19/159 ,  H04N19/122 ,  H04N19/70 ,  H04N19/96 ,  H04N19/105 ,  H04N19/119 ,  H04N19/11 ,  H04N19/176 ,  H04N19/182

Abstract: A method and apparatus for video coding using template-based Intra prediction are disclosed. According to one method, where determining whether to apply the template-based Intra prediction or one or more parameters associated with the template-based Intra prediction depends on the current block size. According to yet another method, the quad-tree plus binary tree (QTBT) structure is used to partition an image or one or more areas of the current image into blocks. If the template-based Intra prediction is used for a current block and the current block is non-square, the width and height of the L-shaped reference pixel line are determined according to width and height of the current block. The L-shaped reference pixel line comprises a top reference pixel segment above the top template and a left reference pixel segment adjacent to a left side of the left template.

公开(公告)号：US10182242B2

公开(公告)日：2019-01-15

申请号：US15101139

申请日：2014-12-26

Applicant: MediaTek Inc.

Inventor： Yu-Chen Sun ,  Jungsun Kim ,  Tzu-Der Chuang ,  Yi-Wen Chen ,  Wang Lin Lai ,  Shan Liu ,  Yu-Wen Huang

IPC: H04N19/593 ,  H04N19/186 ,  H04N19/124 ,  H04N19/176 ,  H04N19/182

Abstract: A method and apparatus for color index coding of a block of video data using index prediction based on reconstructed neighboring pixels are disclosed. In one embodiment, color index encoding or decoding is applied to the current pixel indices by deriving index prediction from neighboring pixel indices of the reconstructed neighboring pixels. The reconstructed neighboring pixel values are first transformed into the neighboring pixel indices according to a quantization table to map between major color indices and major color values of the current block. The quantization table can be based on a major color table for the current block or can also be derived at a decoder side. The decoding process may reconstruct the current pixels by converting decoded current pixel indices to reconstructed current pixel values according to the quantization table or by directly copying the reconstructed neighboring pixel values indicated by decoded current pixel indices.

公开(公告)号：US20180184117A1

公开(公告)日：2018-06-28

申请号：US15848154

申请日：2017-12-20

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh Chen ,  Tzu-Der Chuang ,  Chih-Wei Hsu ,  Yu-Wen Huang

IPC: H04N19/577 ,  H04N19/513 ,  H04N19/176 ,  H04N19/109

Abstract: Method and apparatus of video coding using generalized bi-prediction are disclosed. According to one method, the generalized bi-prediction is extended for Decoder-Side Motion Vector Refinement (DMVR), where unequal weighting factor pair is allowed to form the template of the current block or the final predictor. In another method, the generalized bi-prediction is extended to pattern-based MV derivation (PMVD), where unequal weighting factor pair is allowed to combined reference blocks pointed by motion vectors derived based on PMVD. In yet another method, the generalized bi-prediction is used for Merge mode. When the final Merge MVP selected corresponds to bi-prediction using an unequal weighting factor pair, a new weighting factor pair is derived using neighboring reconstructed pixels of the current block and corresponding motion compensated pixels. In yet another method, the size of a set of weighting factor pairs is dependent on block size.

公开(公告)号：US10003810B2

公开(公告)日：2018-06-19

申请号：US14378965

申请日：2013-03-19

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang ,  Jian-Liang Lin ,  Yi-Wen Chen ,  Shih-Ta Hsiang ,  Shan Liu ,  Shaw-Min Lei

IPC: H04N19/33 ,  H04N19/52 ,  H04N19/577 ,  H04N19/96

CPC classification number: H04N19/33 ,  H04N19/52 ,  H04N19/577 ,  H04N19/96

Abstract: A method and apparatus for coding video data using Inter prediction mode or Merge mode in a video coding system are disclosed, where the video data is configured into a Base Layer (BL) and an Enhancement Layer (EL), and the EL has higher spatial resolution or better video quality than the BL. In one embodiment, at least one information piece of motion information associated with one or more BL blocks in the BL is identified. A motion vector prediction (MVP) candidate list or a Merge candidate list for the selected block in the EL is then determined, where said at least one information piece associated with said one or more BL blocks in the BL is included in the MVP candidate list or the Merge candidate list. The input data associated with the selected block is coded or decoded using the MVP candidate list or the Merge candidate list.

公开(公告)号：US20150341636A1

公开(公告)日：2015-11-26

申请号：US14408947

申请日：2013-04-25

Applicant: MEDIATEK INC.

Inventor： Chia-Yang Tsai ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/105 ,  H04N19/593 ,  H04N19/186

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

Abstract: A method and apparatus of inter-layer and the inter-view adaptive Intra prediction (IL-AIP and IV-AIP) for a video coding system are disclosed. The video data is configured into a Base Layer (BL) and an Enhancement Layer (EL) for the inter-layer video coding system, and the video data is configured into a Base View (BV) and an Enhancement View (EV) for the inter-view video coding system. The adaptive Intra predictor for the to-be-processed block in the EL or the EV is derived based on the BL or the BV. For inter-layer and inter-view adaptive LM Intra prediction, the LM adaptive Intra predictor for the to-be-processed chroma block in the EL or the EV is derived based on the BL or the BV.

Abstract translation: 公开了一种用于视频编码系统的层间方法和装置以及视频间自适应帧内预测（IL-AIP和IV-AIP）。 视频数据被配置为用于层间视频编码系统的基本层（BL）和增强层（EL），视频数据被配置为基本视图（BV）和增强视图（EV），用于 视频间视频编码系统。 EL或EV中待处理块的自适应Intra预测器基于BL或BV导出。 对于层间和视角间自适应LM帧内预测，​​EL或EV中待处理色度块的LM自适应Intra预测器基于BL或BV导出。

公开(公告)号：US20140146891A1

公开(公告)日：2014-05-29

申请号：US14114993

申请日：2012-05-31

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang ,  Shaw-Min Lei ,  Chih-Ming Fu ,  Chia-Yang Tsai

IPC: H04N19/593

CPC classification number: H04N19/13 ,  H04N19/117 ,  H04N19/119 ,  H04N19/146 ,  H04N19/154 ,  H04N19/187 ,  H04N19/30 ,  H04N19/33 ,  H04N19/61 ,  H04N19/70 ,  H04N19/82 ,  H04N19/86 ,  H04N19/96

Abstract: A method and apparatus for scalable video coding are disclosed, wherein the video data is configured into a Base Layer (BL) and an Enhancement Layer (EL) and wherein the EL has higher spatial resolution or better video quality than the BL. According to embodiments of the present invention, information from the base layer is exploited for coding the enhancement layer. The information coding for the enhancement layer includes CU structure, motion information, motion information, MVP/merge candidates, intra prediction mode, residual quadtree information, texture information, residual information, context adaptive entropy coding, Adaptive Lop Filter (ALF), Sample Adaptive Offset (SAO), and deblocking filter.

Abstract translation: 公开了一种用于可缩放视频编码的方法和装置，其中视频数据被配置为基本层（BL）和增强层（EL），并且其中EL具有比BL更高的空间分辨率或更好的视频质量。 根据本发明的实施例，利用来自基础层的信息来对增强层进行编码。 增强层的信息编码包括CU结构，运动信息，运动信息，MVP /合并候选，帧内预测模式，残余四叉树信息，纹理信息，残差信息，上下文自适应熵编码，自适应Lop滤波器（ALF） 偏移（SAO）和去块滤波器。

公开(公告)号：US12192486B2

公开(公告)日：2025-01-07

申请号：US17978530

申请日：2022-11-01

Applicant: MediaTek Inc.

Inventor： Cheng-Yen Chuang ,  Chun-Chia Chen ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/176 ,  H04N19/119

Abstract: Various schemes pertaining to video coding parallelization techniques are described. An apparatus receives video data. The apparatus subsequently calculates a plurality of figures of merits (FOMs), each of the FOM representing how well a particular coding tool may perform in encoding the video data. The apparatus further determines a coding tool that may be suitable for encoding the video data by comparing the FOMs. In determining the coding tool, the apparatus utilizes time-interleaving techniques to parallelly process the video data. The video data may include an array of coding blocks, and the apparatus may receive the video data using a snake-like processing order scanning through the array of coding blocks.