公开(公告)号：US20180091829A1

公开(公告)日：2018-03-29

申请号：US15545381

申请日：2016-02-03

Applicant: MEDIATEK INC.

Inventor： Shan LIU ,  Xiaozhong XU ,  Tzu-Der CHUANG ,  Yu-Chen SUN ,  Wang-Lin LAI ,  Yu-Wen HUANG ,  Jing YE

IPC: H04N19/93 ,  H04N19/593

CPC classification number: H04N19/93 ,  H04N19/182 ,  H04N19/593 ,  H04N19/70 ,  H04N19/91

Abstract: A method of palette index map coding of blocks in a picture by grouping coded symbols of the same type is disclosed for video encoder and decoder. In one embodiment, all syntax elements corresponding to the pixel index are grouped into a pixel index group, and all syntax elements corresponding to the escape pixel are grouped into an escape pixel group. All syntax elements corresponding to the run type and run length are grouped into an interleaved run type/run length group, or grouped into separate run type group and run length group. In another embodiment, the system parses from the video bitstream a last-run mode syntax element for a current block, where the last-run mode syntax element indicates whether a last run mode is a copy-index mode or a copy-above mode. Information associated with the last-run mode syntax element is used for reconstructing palette index map.

公开(公告)号：US20170272745A1

公开(公告)日：2017-09-21

申请号：US15460558

申请日：2017-03-16

Applicant: MEDIATEK INC.

Inventor： Shan LIU ,  Xiaozhong XU ,  Jing YE

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

Abstract: An intra prediction method comprises receiving input data of a current block in a current picture, determines a current mode set including multiple intra prediction modes for the current block, derives a number of MPMs from the number of intra prediction modes in the current mode set, and determines the MPMs for the current block. The number of MPMs varies with the number of intra prediction modes in the current mode set. The method encodes or decodes the current block according to a current intra prediction mode selected from the current mode set. To process a non-square block, a current mode set is selected from multiple mode sets according to one or both of a longer side and a shorter side of the non-square block. A current intra prediction mode is selected from the current mode set and the non-square block is coded according to the current intra prediction mode.

公开(公告)号：US20170223379A1

公开(公告)日：2017-08-03

申请号：US15514926

申请日：2015-10-08

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Xiaozhong XU ,  Yu-Chen SUN ,  Shih-Ta HSIANG ,  Shan LIU

IPC: H04N19/593 ,  H04N19/513 ,  H04N19/167 ,  H04N19/176

CPC classification number: H04N19/593 ,  H04N19/513 ,  H04N19/52

Abstract: A method of video coding using coding modes including IntraBC mode (Intra-block copy mode) for a picture is disclosed. The system determines whether the current reference block is located above a current coding unit (CU) containing the current prediction unit (PU) in a vertical direction and whether the current reference block is located on a left side of the current CU in a horizontal direction based on the original block vector (BV). If both results are not true, the original BV is clipped to a clipped BV so that a relocated reference block corresponding to the clipped BV is above the current CU in the vertical direction or to the left side of the current CU in the horizontal direction. The clipped BV is used as a predictor for encoding or decoding of a current BV or used for IntraBC encoding or decoding of the current PU.

公开(公告)号：US20160100184A1

公开(公告)日：2016-04-07

申请号：US14821100

申请日：2015-08-07

Applicant: MediaTek Inc.

Inventor： Shan LIU ,  Jungsun KIM ,  Tzu-Der CHUANG

IPC: H04N19/50 ,  H04N19/46 ,  H04N19/70 ,  H04N19/105 ,  H04N19/186 ,  H04N19/96 ,  H04N1/64

CPC classification number: H04N19/50 ,  H04N1/644 ,  H04N19/105 ,  H04N19/11 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/46 ,  H04N19/463 ,  H04N19/593 ,  H04N19/70 ,  H04N19/93 ,  H04N19/94 ,  H04N19/96

Abstract: Methods for coding a block of video data using palette coding in a video coding are disclosed. According to one embodiment, the palette transpose flag is signaled conditionally depending on the maximum index value or the palette size. If the maximum index value or the palette size is equal to or greater than a threshold size, the palette transpose flag is signaled at an encoder side or parsed at a decoder side. Otherwise, the palette transpose flag is not signaled or parsed. In another embodiment, the last palette and the last palette size are updated by the current palette with the current palette size conditionally. For example, updating the last palette and the last palette size by the current palette with the current palette size is skipped if the current coding unit is coded using a pulse-coded modulation (PCM) mode or the current palette size is zero.

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。 根据一个实施例，根据最大索引值或调色板大小有条件地发信号通知调色板转置标志。 如果最大索引值或调色板大小等于或大于阈值大小，则调色板转置标志在编码器侧发信号通知或在解码器侧进行解析。 否则，调色板转置标志不发信号或解析。 在另一个实施例中，最后一个调色板和最后一个调色板大小由具有条件的当前调色板大小的当前调色板更新。 例如，如果使用脉冲编码调制（PCM）模式或当前调色板大小为零对当前编码单元进行编码，则跳过具有当前调色板大小的当前调色板更新最后调色板和最后调色板尺寸。

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：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.