公开(公告)号：US20200322602A1

公开(公告)日：2020-10-08

申请号：US16304203

申请日：2017-05-27

Applicant: MEDIATEK INC.

Inventor： Han HUANG ,  Ching-Yeh CHEN ,  Shan LIU ,  Xiaozhong XU ,  Tzu-Der CHUANG ,  Yu-Wen HUANG

IPC: H04N19/119 ,  H04N19/46 ,  H04N19/96 ,  H04N19/186 ,  H04N19/176 ,  H04N19/174

Abstract: Processing methods and apparatuses for video data of a color component comprise receiving input data associated with a current coding block (CB) in a current slice, where the video data is partitioned into multiple CBs according to a partitioning method. A Quantization Parameter (QP) minimum block area or a depth flag is determined and an area of the current CB according to a width and a height or a combined depth of the current CB is calculated and compared with the QP minimum block area or the depth flag. Signaling of QP information for the current CB is conditioned by the comparing result. The QP information for the current CB is used to quantize a residual signal of the current CB or recovering a quantized residual signal of the current CB.

公开(公告)号：US20190082191A1

公开(公告)日：2019-03-14

申请号：US16083662

申请日：2017-03-13

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Han HUANG ,  Xiaozhong XU ,  Shan LIU

IPC: H04N19/513 ,  H04N19/58 ,  H04N19/119 ,  H04N19/176

Abstract: A method and apparatus for video encoding and decoding with affine motion compensation are disclosed. An embodiment of the method receives input data associated with a current block coded or to be coded in an affine mode. Two or more motion vectors of a neighboring block are retrieved from a buffer, where at least one of the retrieved motion vectors is not corresponding to a sub-block in a first neighboring block row or a first neighboring block column. The method derives an affine candidate including affine motion vectors using the retrieved two or more motion vectors, and encodes or decodes the current block by predicting the current block using one or more motion compensated blocks by the derived affine candidate. The buffer for affine candidate derivation stores selective motion vectors less than all motion vectors of coded blocks in the current picture.

公开(公告)号：US20180041773A1

公开(公告)日：2018-02-08

申请号：US15658854

申请日：2017-07-25

Applicant: MEDIATEK INC.

Inventor： Jing YE ,  Shan LIU

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

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/176 ,  H04N19/186

Abstract: Aspects of the disclosure include a method of video coding. The method includes receiving input data associated with a first block and a second block of an image frame, the first block and the second block corresponding to different color space components. The method further includes identifying a reference region in the first block, identifying at least two reference unit cells among a plurality of unit cells in the reference region, identifying respective intra prediction modes for processing the identified reference unit cells, determining an intra prediction mode for processing a sub-block in the second block based on the identified intra prediction modes, and generating an intra predictor of the sub-block based on the determined intra prediction mode. The reference region and the sub-block correspond to a same region in the image frame. The method further includes encoding or decoding the sub-block based on the intra predictor of the sub-block.

公开(公告)号：US20170272757A1

公开(公告)日：2017-09-21

申请号：US15458446

申请日：2017-03-14

Applicant: MEDIATEK INC.

Inventor： Xiaozhong XU ,  Shan LIU

IPC: H04N19/159 ,  H04N19/105

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/11 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/196 ,  H04N19/46 ,  H04N19/593

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：US20200084454A1

公开(公告)日：2020-03-12

申请号：US15746892

申请日：2016-07-26

Applicant: MEDIATEK INC.

Inventor： Shan LIU ,  Xiaozhong XU

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/105 ,  H04N19/82 ,  H04N19/70 ,  H04N19/174 ,  H04N19/172 ,  H04N19/186 ,  H04N19/52

Abstract: A method and system for video system using coding modes including an Inter prediction mode and an Intra Block Copy (IntraBC) mode are disclosed. A syntax element in a bitstream is determined to indicate whether two versions of a reconstructed current image unit are needed. If two versions of the reconstructed current image unit are needed, a loop-filtered version of the reconstructed current image unit and a non-loop-filter version of the reconstructed current image unit are allowed to be stored and used as reference data. Otherwise, only one version of the reconstructed current image unit is stored as the reference data. According to another method, bi-prediction mode is converted to uni-prediction mode for a certain prediction mode, where the bandwidth exceeds the existing worst case.

公开(公告)号：US20190394493A1

公开(公告)日：2019-12-26

申请号：US16558660

申请日：2019-09-03

Applicant: MEDIATEK INC.

Inventor： Han HUANG ,  Shan LIU ,  Chih-Wei HSU

IPC: H04N19/86 ,  H04N19/105 ,  H04N19/117 ,  H04N19/167 ,  H04N19/176 ,  H04N19/196

Abstract: Aspects of the disclosure provide a method of video coding includes receiving input data associated with a first block and a second block of an image frame. The method further includes identifying a reference size and performing a deblocking process if it is determined that the deblocking process is to be performed. The preforming the deblocking process may include processing pixels adjacent to the block boundary using a first set of deblocking filter settings if a first block size of the first block and a second block size of the second block are greater than the reference size, and processing the pixels using a second set of deblocking filter settings if the first block size or the second block size is not greater than the reference size.

公开(公告)号：US20190110071A1

公开(公告)日：2019-04-11

申请号：US16203994

申请日：2018-11-29

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 ,  H04N19/124 ,  H04N19/186 ,  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：US20190044645A1

公开(公告)日：2019-02-07

申请号：US16074014

申请日：2017-02-17

Applicant: MEDIATEK INC.

Inventor： Lulin CHEN ,  Shan LIU

IPC: H04L1/00 ,  H04L29/06

CPC classification number: H04L1/007 ,  H04L1/0009 ,  H04L1/0023 ,  H04L1/0025 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0061 ,  H04L1/0066 ,  H04L1/0075 ,  H04L1/0083 ,  H04L65/607 ,  H04L69/22 ,  H04L2001/0097

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：US20180184093A1

公开(公告)日：2018-06-28

申请号：US15757104

申请日：2016-09-06

Applicant: MEDIATEK INC.

Inventor： Xiaozhong XU ,  Shan LIU

IPC: H04N19/159 ,  H04N19/134 ,  H04N19/152

Abstract: A method for a video encoder or decoder using an Intra Block Copy (IntraBC) mode is disclosed. If IntraBC mode is enabled and no loop filter is used for a current picture, a currently decoded reference picture for the current picture is marked as a long-term reference picture before and during decoding of the current picture. The currently decoded reference picture is assigned in reference picture list construction for IntraBC reference of the current picture and buffer fullness for the DPB is calculated before starting decoding the current picture by taking into account of only one reference picture buffer. According to another method, if the maximum DPB size is 1, a variable or a syntax element is set to a target value to impose restriction to use only one picture storage buffer in the DPB to store reference picture for encoding or decoding of a current picture.

公开(公告)号：US20180103268A1

公开(公告)日：2018-04-12

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 ,  H04N19/96 ,  H04N19/176 ,  H04N19/159 ,  H04N19/91

CPC classification number: H04N19/593 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/1883 ,  H04N19/91 ,  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.