公开(公告)号：US20160057434A1

公开(公告)日：2016-02-25

申请号：US14805605

申请日：2015-07-22

Applicant: MediaTek Inc.

Inventor： Wang Lin LAI ,  Shan LIU ,  Tzu-Der CHUANG ,  Jungsun KIM

IPC: H04N19/176 ,  H04N19/44

CPC classification number: H04N19/176 ,  H04N1/644 ,  H04N19/105 ,  H04N19/11 ,  H04N19/182 ,  H04N19/186 ,  H04N19/44 ,  H04N19/463 ,  H04N19/593 ,  H04N19/70 ,  H04N19/93 ,  H04N19/94

Abstract: / Method and apparatus for coding a block of video data using palette coding in a video coding are disclosed. According to one embodiment, whether there is only one single palette index in the current block is determined first. If there is only one single palette index in the current block, signaling a current palette index map for the current block is omitted at an encoder side or parsing any syntax for decoding the current palette index map for the current block is omitted at a decoder side. The decision regarding whether there is only one single palette index in the current block is based on one or more syntax elements not corresponding to palette index coding.

Abstract translation: 公开了使用视频编码中的调色板编码对视频数据块进行编码的方法和装置。 根据一个实施例，首先确定当前块中是否只有一个单调色板索引。 如果当前块中只有一个调色板索引，则在编码器侧省略当前块的当前调色板索引映射，或者在解码器侧省略当前块的当前调色板索引映射的任何语法解码 。 关于当前块中是否只有一个调色板索引的决定基于一个或多个不对应于调色板索引编码的语法元素。

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：US20190394461A1

公开(公告)日：2019-12-26

申请号：US16558759

申请日：2019-09-03

Applicant: MEDIATEK INC.

Inventor： Shan LIU ,  Xiaozhong XU ,  Jing YE

IPC: H04N19/107 ,  H04N19/159 ,  H04N19/46

Abstract: A method processes video data by intra prediction in a video coding system. In one implementation, the method receives input data associated with a current block in a current picture, wherein the current block is a non-square block and is coded or to be coded by intra prediction. The method then determines a first set of angular intra prediction modes for the longer side of the current block, wherein a number of the first set of the angular intra prediction modes is greater than a number of a second set of angular intra prediction modes for the shorter side of the current block. The method then determines a current intra prediction mode to derive an intra predictor for the current block, and encodes or decoding the current block according to the current intra prediction mode.

公开(公告)号：US20190289299A1

公开(公告)日：2019-09-19

申请号：US16405246

申请日：2019-05-07

Applicant: MEDIATEK INC.

Inventor： Xiaozhong XU ,  Shan LIU

IPC: H04N19/159 ,  H04N19/11 ,  H04N19/105

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：US20190028731A1

公开(公告)日：2019-01-24

申请号：US16065320

申请日：2017-01-06

Applicant: MEDIATEK INC.

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

IPC: H04N19/52 ,  H04N19/159 ,  H04N19/105 ,  H04N19/567 ,  H04N19/176

Abstract: Methods and apparatus of Inter prediction for video coding performed by a video encoder or a video decoder that utilizes motion vector prediction (MVP) to code a motion vector (MV) associated with a block coded with coding modes including affine Inter mode are disclosed. According to one method, MVP pairs for the current block are derived based on neighbouring blocks related to two control points for representing a 4-parameter affine motion model associated with the current block. A final MVP pair is selected based on two MVs for each MVP pair. In another method, MVP sets for three control points are derived to represent a 6-parameter affine motion model associated with the current block. A final MVP set is selected and included in the Inter candidate list. According to another method, one or more decoder-side derived MVs are included in a MVP set for inclusion in the Inter candidate list.

公开(公告)号：US20180213300A1

公开(公告)日：2018-07-26

申请号：US15749562

申请日：2016-08-05

Applicant: MEDIATEK INC.

Inventor： Lulin CHEN ,  Shan LIU

IPC: H04N21/845 ,  H04N21/61

CPC classification number: H04N21/8455 ,  H04N21/2343 ,  H04N21/44016 ,  H04N21/4621 ,  H04N21/6125 ,  H04N21/8456

Abstract: A method and device for switching Representations are disclosed. On the server side, leading-picture information associated with leading pictures in an open GOP (group of picture) is signalled in a media presentation description. Each leading picture corresponds to one picture preceding a RAP (Random Access Picture) picture in a segment in an output order and being coded depending on the RAP picture. At the client side, an original Representation and a target representation are received and the leading-picture information for the target Representation is determined from the media presentation description received. A switched presentation is presented, where the switched presentation switches from the original Representation to the target Representation by switching presentation from pictures in the original Representation to pictures in the target Representation at a stream access point (SAP) corresponding to the RAP picture in one segment of the target representation determined according to the leading picture information.

公开(公告)号：US20180139444A1

公开(公告)日：2018-05-17

申请号：US15812160

申请日：2017-11-14

Applicant: MEDIATEK INC.

Inventor： Han HUANG ,  Shan LIU

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/196 ,  H04N19/159 ,  H04N19/122

CPC classification number: H04N19/119 ,  H04N19/122 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196

Abstract: A method and apparatus for video coding using flexible quadtree and binary tree block partition are disclosed. According to this method, a current block is partitioned into multiple final sub-blocks using one or more stages of quadtree partitioning and binary tree partitioning, where at least one sub-block is generated by applying the quadtree partitioning to one previous sub-block generated by the binary tree partitioning. According to another method, one or more horizontal splitting flags and one or more vertical splitting flags are used for determining block partition of the current block into multiple sub-blocks using one or more stages of quadtree partitioning and binary tree partitioning. Multiple sub-blocks partitioned from the current block are determined according to the horizontal splitting flags and the vertical splitting flags. The multiple sub-blocks are then encoded or decoded.