公开(公告)号：US10897631B2

公开(公告)日：2021-01-19

申请号：US16540141

申请日：2019-08-14

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Shan Liu ,  Xiaozhong Xu

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/105 ,  H04N19/159 ,  H04N19/11 ,  H04N19/70 ,  H04N19/51

Abstract: A method and apparatus for video coding operates by receiving input data associated with a current block in a current picture, determining restricted prediction based on whether IntraBC prediction (Intra Block Copy prediction) is included in a plurality of candidate coding modes, wherein said determining the restricted prediction comprising disabling or disallowing selected prediction for one or more selected PU (prediction unit) sizes, PU prediction types or both, and applying video coding to the current block using the candidate coding modes including IntraBC prediction (Intra Block Copy prediction) in accordance with the restricted prediction.

公开(公告)号：US10779004B2

公开(公告)日：2020-09-15

申请号：US15729831

申请日：2017-10-11

Applicant: MEDIATEK INC.

Inventor： Han Huang ,  Shan Liu

IPC: H04N19/593 ,  H04N19/119 ,  H04N19/169 ,  H04N19/91 ,  H04N19/176 ,  H04N19/159 ,  H04N19/96

Abstract: A video coding system receives input data of a current block split from a parent block, and determines if the parent block is split by horizontal triple tree (TT) partitioning or vertical TT partitioning. A partition type selecting from TT partitioning and binary tree (BT) partitioning and a partition direction selecting from horizontal partitioning and vertical partitioning for splitting the current block are determined by prohibiting a horizontal partitioning type if the parent block is split by horizontal TT partitioning, and prohibiting a vertical partitioning type if the parent block is split by vertical TT partitioning, where the horizontal partitioning type and the vertical partitioning type depend on whether the current block is a middle sub-block in the parent block. The video coding system processes the current block according to the partition type and the partition direction.

公开(公告)号：US10575013B2

公开(公告)日：2020-02-25

申请号：US15766921

申请日：2016-10-18

Applicant: MEDIATEK INC.

Inventor： Shan Liu ,  Xiaozhong Xu

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/423 ,  H04N19/70

Abstract: Method and apparatus of managing a DPB (decoded picture buffer) for a video coding system are disclosed. Whether the IntraBC mode is used for a current picture is determined and a maximum allowed number of decoded pictures in the DPB is allocated based on whether the IntraBC mode is used for the current picture. The current picture is then encoded or decoded using decoded pictures stored in the DPB as reference data. In another method, a maximum number of reordered pictures in the DPB is determined. If certain conditions are true, one or more decoded pictures stored in the DPB will be emptied until none of the conditions is true. One condition corresponds to a number of decoded pictures in the DPB marked as “needed for output” being greater than the maximum number of reordered picture modified according to whether the IntraBC mode is used for the current picture.

公开(公告)号：US10404411B2

公开(公告)日：2019-09-03

申请号：US16074014

申请日：2017-02-17

Applicant: MEDIATEK INC.

Inventor： Lulin Chen ,  Shan Liu

IPC: H04L1/00 ,  H04L29/06

Abstract: A method and system of AL-FEC using MMT protocol performed are disclosed. For an MMT receiving entity, a bounded FEC configuration setting is received from an MMT sending entity. The bounded FEC configuration setting belongs to an FEC configuration group consisting of at least one FEC configuration setting having a bounded-number of stages or layers of FEC coding structure, where the bounded-number is a positive integer greater than 1. If the bounded FEC configuration setting corresponds to one FEC configuration setting having the bounded-number of stages or layers of FEC coding structure, one or more FEC source packets and FEC repair packets are received from the MMT sending entity are FEC decoded into one recovered MMT packet using a range of FEC schemes having a target number of stages or layers of FEC coding structure from 1 to the bounded-number. The process for an MMT sending entity is also disclosed.

公开(公告)号：US10397569B2

公开(公告)日：2019-08-27

申请号：US15611850

申请日：2017-06-02

Applicant: MEDIATEK INC.

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

IPC: H04N19/00 ,  H04N19/11 ,  H04N19/156 ,  H04N19/176 ,  H04N19/593 ,  H04N19/82 ,  H04N19/147 ,  H04N19/463

Abstract: A method and apparatus for video coding using template-based Intra prediction are disclosed. According to one method, the template-based Intra prediction searches N template matching candidates to reduce the complexity. In another method, the template-based Intra prediction assigns different weights for different pixel locations of template or uses different pixel precision for interpolation filter during cost evaluation among template matching candidates. In yet another method, truncated template size is used to reduce the complexity. In yet another method, the left and top templates may have different sizes for non-square block. In yet another method, inverse templated-based Intra prediction is used.

公开(公告)号：US10390021B2

公开(公告)日：2019-08-20

申请号：US15458446

申请日：2017-03-14

Applicant: MEDIATEK INC.

Inventor： Xiaozhong Xu ,  Shan Liu

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186

Abstract: Aspects of the disclosure include a method for video coding. The method includes receiving input data associated with a current block in an image frame, selecting a reference pixel set from a plurality of candidate neighboring pixel sets adjacent to an edge of the current block, generating an intra predictor of the current block based on the selected reference pixel set and an intra prediction mode of the current block, and encoding or decoding the current block based on the intra predictor to output encoded video data or a decoded block. Each set of the candidate neighboring pixel sets is arranged in parallel with the edge of the current block.

公开(公告)号：US20180199042A1

公开(公告)日：2018-07-12

申请号：US15861503

申请日：2018-01-03

Applicant: MediaTek Inc.

Inventor： Xin Wang ,  Wang Lin Lai ,  Lulin Chen ,  Shan Liu

IPC: H04N19/167 ,  H04N19/172

Abstract: The techniques described herein relate to methods, apparatus, and computer readable media configured to encode or decode a region of interest associated with video data. A spherical region structure is associated with the video data that specifies the region of interest on a sphere, the spherical region structure including a reference point of the region of interest on the sphere, and data indicative of a set of side points, comprising a side point for each side of the region of interest on the sphere. The region of interest in the video data is determined based on the reference point and the set of side points. The video data can be composite video data. The spherical region structure, and/or metadata based on the spherical region structure, can be implicitly or explicitly associated with the video data.

公开(公告)号：US20180048877A1

公开(公告)日：2018-02-15

申请号：US15663932

申请日：2017-07-31

Applicant: MEDIATEK INC.

Inventor： Wang Lin Lai ,  Shan Liu

IPC: H04N13/00

CPC classification number: H04N13/178 ,  H04N13/111 ,  H04N21/816 ,  H04N21/85406

Abstract: Aspects of the disclosure provide an apparatus that includes an interface circuit, a processing circuit, and a display device. The interface circuit is configured to receive media data with video content being structured into one or more tracks corresponding to one or more spatial partitions. The media data includes a correspondence of the one or more tracks to the one or more spatial partitions. The processing circuit is configured to extract the correspondence of the one or more tracks to the one or more spatial partitions, select, from the one or more tracks, one or more covering tracks with spatial partitions covering a region of interest based on the correspondence, and generate images of the region of interest based on the one or more covering tracks. The display device is configured to display the images of the region of interest.

公开(公告)号：US20180020202A1

公开(公告)日：2018-01-18

申请号：US15647630

申请日：2017-07-12

Applicant: MediaTek Inc.

Inventor： Xiaozhong Xu ,  Shan Liu

IPC: H04N13/00 ,  H04N19/46 ,  H04N19/167 ,  H04N19/86 ,  H04N19/117

CPC classification number: H04N13/106 ,  G06T3/0025 ,  H04N13/161 ,  H04N19/117 ,  H04N19/136 ,  H04N19/167 ,  H04N19/182 ,  H04N19/423 ,  H04N19/46 ,  H04N19/86

Abstract: A video system for encoding or decoding 360-degree virtual reality (360VR) video is provided. The system performs filtering operations to reduce coding artifacts and discontinuities in a projection image of an omnidirectional image. The video system identifies first and second edges of the projection image. The first and second edges are physically correlated as a common edge in the omnidirectional image but not physically connected in the projection image. The system computes a set of filtered pixels based on a first set of pixels near the first edge and a second set of pixels near the second edge.

公开(公告)号：US20160142706A1

公开(公告)日：2016-05-19

申请号：US15007509

申请日：2016-01-27

Applicant: MediaTek Inc.

Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang ,  Shan Liu ,  Zhi Zhou ,  Shaw-Min Lei

IPC: H04N19/11 ,  H04N19/169 ,  H04N19/176 ,  H04N19/44 ,  H04N19/136

Abstract: A method for chroma intra prediction mode decoding includes decoding a chroma intra prediction mode for a current chroma block according to a codeword set corresponding to a chroma intra prediction mode set, wherein the codeword set comprises at least one codeword with a first length type and at least one codeword with a second length type. If a codeword is one of said at least one codeword with the first length type, the chroma intra prediction mode is decoded as a Luma-based chroma prediction Mode (LM) or a Direct Mode (DM). The method also includes determines the chroma intra prediction mode based on an intra prediction mode of a current luma block if the chroma intra prediction mode is the DM.

Abstract translation: 色度帧内预测模式解码方法包括根据对应于色度帧内预测模式集合的码字集解码当前色度块的色度帧内预测模式，其中码字组包括至少一个第一长度类型的码字， 具有第二长度类型的至少一个码字。 如果码字是具有第一长度类型的所述至少一个码字之一，则色度帧内预测模式被解码为基于亮度的色度预测模式（LM）或直接模式（DM）。 该方法还包括如果色度帧内预测模式是DM，则基于当前亮度块的帧内预测模式来确定色度帧内预测模式。