公开(公告)号：US20190182505A1

公开(公告)日：2019-06-13

申请号：US16321907

申请日：2017-08-10

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/52 ,  H04N19/119 ,  H04N19/96 ,  H04N19/70 ,  H04N19/176

Abstract: Video processing methods and apparatuses for encoding or decoding video data comprise receiving input data associated with a current block in a current picture, determining a first reference block, splitting the current block into multiple partitions according to predicted textures of the first reference block, and separately predicting or compensating each partition of the current block to generate predicted regions or compensated regions. The current block is encoded according to the predicted regions and original data of the current block or the current block is decoded by reconstructing the current block according to the compensated regions of the current block.

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：US20180242024A1

公开(公告)日：2018-08-23

申请号：US15869759

申请日：2018-01-12

Applicant: MEDIATEK INC.

Inventor： Chun-Chia CHEN ,  Chih-Wei HSU ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/96 ,  H04N19/159 ,  H04N19/176 ,  H04N19/66

CPC classification number: H04N19/96 ,  H04N19/159 ,  H04N19/176 ,  H04N19/463 ,  H04N19/52 ,  H04N19/66

Abstract: Video processing methods and apparatuses for candidate set determination for a current block partitioned from a parent block by quad-tree splitting comprise receiving input data of a current block, determining a candidate set for the current block by prohibiting a spatial candidate derived from any of neighboring blocks partitioned from the same parent block or determining the candidate set for the current block by conducting a pruning process if all the neighboring blocks are coded in Inter prediction and motion information of the neighboring blocks are the same, and encoding or decoding the current block based on the candidate set by selecting one final candidate from the candidate set. The pruning process comprises scanning the candidate set to determine if any candidate equals to the spatial candidate derived from the neighboring blocks, and removing the candidate equals to the spatial candidate from the candidate set.

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：US20180070077A1

公开(公告)日：2018-03-08

申请号：US15795582

申请日：2017-10-27

Applicant: MEDIATEK INC

Inventor： Chia-Yang TSAI ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/105 ,  H04N19/30 ,  H04N19/597 ,  H04N19/593 ,  H04N19/70 ,  H04N19/186 ,  H04N19/136

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

Abstract: A method of inter-layer or inter-view prediction for an inter-layer or inter-view video coding system is disclosed. The method includes receiving a to-be-processed block in the EL or the EV, determining a collocated block in the BL (Base layer) or the BV (Base View), wherein the collocated block is located at a location in the BL or the BV corresponding to the to-be-processed block in the EL (Enhancement Layer)or in the EV (Enhancement view), deriving a predictor for the to-be-processed block in the EL or the EV from the collocated block in the BL or the BV based on pixel data of the BL or the BV, wherein the predictor corresponds to a linear function of pixel data in the collocated block, and encoding or decoding the to-be-processed block in the EL or the EV using the predictor.

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：US20170085906A1

公开(公告)日：2017-03-23

申请号：US15126355

申请日：2015-04-01

Applicant: MediaTek Inc.

Inventor： Ching-Yeh CHEN ,  Tzu-Der CHUANG ,  Yu-Wen HUANG

IPC: H04N19/52 ,  H04N19/159 ,  H04N19/56 ,  H04N19/105

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/56 ,  H04N19/593 ,  H04N19/70

Abstract: A method and apparatus for motion information coding using a refined Merge mode are disclosed. Embodiments of the present invention not only uses the Merge index to indicate the selected Merge candidate, but also refines partial motion information of the selected Merge candidate. An encoder according to the present invention derives a Merge candidate set based on the motion information associated with neighboring blocks. The encoder selects a target Merge candidate from the Merge candidate set and signal a Merge index corresponding to the target Merge candidate. The encoder then predicts a part of the current motion information based on partial motion information associated with the target Merge candidate to generate coded motion information. The process for a decoder incorporating the refined Merge mode is also disclosed.

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：US20150381999A1

公开(公告)日：2015-12-31

申请号：US14767469

申请日：2014-03-12

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/33 ,  H04N19/53 ,  H04N19/61 ,  H04N19/39

CPC classification number: H04N19/33 ,  H04N19/39 ,  H04N19/503 ,  H04N19/513 ,  H04N19/53 ,  H04N19/61

Abstract: A method of inter-layer motion vector scaling using an inter-layer MV scaling factor to reduce computational complexity is disclosed. In one embodiment, image size information regarding the EL picture and the BL picture of the video sequence is received. An inter-layer motion vector (MV) scaling factor is determined based on the image size information. Scaled MVs are determined based on the BL MVs and the inter-layer MV scaling factor. The scaled MVs are then provided for inter-layer coding of the EL picture. In another embodiment, an inter-layer position-mapping scaling factor is determined based on the image size information regarding the EL picture and the BL picture. BL mapping positions corresponding to EL pixel positions are determined based on the EL pixel positions and the inter-layer position-mapping scaling factor. The up-sampled BL picture at the BL mapping positions is then provided for inter-layer coding of the EL picture.

Abstract translation: 公开了使用层间MV缩放因子来降低计算复杂度的层间运动矢量缩放的方法。 在一个实施例中，接收关于视频序列的EL图像和BL图像的图像尺寸信息。 基于图像尺寸信息确定层间运动矢量（MV）缩放因子。 基于BL MV和层间MV缩放因子确定缩放MV。 然后将缩放的MV提供给EL图像的层间编码。 在另一个实施例中，基于关于EL图像和BL图像的图像尺寸信息来确定层间位置映射缩放因子。 基于EL像素位置和层间位置映射缩放因子确定对应于EL像素位置的BL映射位置。 然后，将BL绘图位置的上采样BL图像提供给EL图像的层间编码。