公开(公告)号：US20190273930A1

公开(公告)日：2019-09-05

申请号：US16414992

申请日：2019-05-17

Applicant: MEDIATEK INC.

Inventor： Shih-Ta HSIANG ,  Tzu-Der CHUANG ,  Yu-Wen HUANG

IPC: H04N19/186 ,  G06T9/00 ,  H04N19/593 ,  H04N19/70 ,  H04N19/91 ,  H04N19/182

Abstract: A method and apparatus for video coding using coding modes including a palette mode are disclosed. In one embodiment, the total number of palette indices in the current block is coded into a binary string using a TR (Truncated Rice) binarization process with the Rice parameter to generate a prefix part and using an EGk (k-th order Exp-Golomb) binary process to generate a suffix part for the binary string, or using the EGk binarization process with the Rice parameter (k). The suffix part is allowed to be empty. In another embodiment, a Rice parameter is determined. If the Rice parameter is equal to or greater than log-base-2 of current block size, the variable related to a total number of palette indices in the current block of video data is binarized into a binary string using a fixed-length code with bit length equal to log-base-2 of current block size.

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：US20190045183A1

公开(公告)日：2019-02-07

申请号：US15757694

申请日：2016-09-05

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh CHEN ,  Chih-Wei HSU ,  Han HUANG ,  Yu-Wen HUANG

IPC: H04N19/109 ,  H04N19/117 ,  H04N19/176 ,  H04N19/577 ,  H04N19/137

Abstract: A method and apparatus of video coding using adaptive Inter prediction are disclosed. A selected Inter prediction process is determined, wherein the selected Inter prediction process selects an Inter prediction filter from multiple Inter prediction filters for the current block depending on first pixel data comprising neighbouring reconstructed pixels (NRP) of the current block. The selected Inter prediction process may be further determined depending on extra motion compensated pixels (EMCP) around a motion-compensated reference block corresponding to the current block. Distortion between the NRP and EMCP can be used to determine the selected Inter prediction filter. The distortion can be calculated using a sum of absolute differences or squared differences between the NRP and the EMCP.

公开(公告)号：US20180332292A1

公开(公告)日：2018-11-15

申请号：US15775478

申请日：2016-11-16

Applicant: MEDIATEK INC.

Inventor： Jian-Liang LIN ,  Yu-Wen HUANG

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/117 ,  H04N19/126

CPC classification number: H04N19/159 ,  H04N19/11 ,  H04N19/117 ,  H04N19/126 ,  H04N19/129 ,  H04N19/176 ,  H04N19/182 ,  H04N19/463 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70

Abstract: A method and apparatus of Intra prediction filtering in an image or video encoder or decoder are disclosed. The method comprises receiving input data associated with a current block (1110); determining a current Intra prediction mode belonging to a set of available Intra prediction modest for the current block (1120); according to the current Intra prediction mode, determining an initial Intra prediction block consisting of initial Intra prediction pixel values based on neighboring reconstructed samples of the current block (1130); applying Intra prediction filter to the initial Intra prediction block according to a current scanning order selected from multiple scanning orders depending on the current Intra prediction mode to generate a filtered Intra prediction block consisting of filtered Intra prediction pixel values, wherein inputs to the Intra prediction filter comprise a current pixel and one or more adjacent pixels, and said multiple scanning orders comprise at least two scanning orders selected from a vertical scanning order, a horizontal scanning order and a diagonal scanning order (1140); applying mode-dependent Intra prediction encoding or depending to the current block using the filtered Intra prediction block as a predictor for the current block (1150).

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：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：US20160269753A1

公开(公告)日：2016-09-15

申请号：US15034115

申请日：2014-11-10

Applicant: MediaTek Inc.

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

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/68 ,  H04N19/18

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/119 ,  H04N19/14 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/196 ,  H04N19/68 ,  H04N19/70

Abstract: A method of adaptive loop filtering for reconstructed video to improve the performance is disclosed. In one embodiment, a loop filter is selected from one or more candidate filters including a circular symmetrical filter candidate. The candidate filters also may include a ½-symmetry filter candidate and a flag is used to select between different symmetries. In another embodiment, a priority-based block filter merge is disclosed. A filter merge list consisting of no more than a first number of filter candidates selected from corresponding filters used by corresponding set members in the neighboring block set is generated according to a priority order of the set members in the neighboring block set. In yet another embodiment, the loop filter is shared by reconstructed video in multiple image units of a same group. The filter merge groups are identified by differences of consecutive group indices.

Abstract translation: 公开了一种重建视频自适应环路滤波方法，以提高性能。 在一个实施例中，从包括圆形对称滤波器候选的一个或多个候选滤波器中选择一个环路滤波器。 候选滤波器还可以包括½对称滤波器候选，并且标记用于在不同对称之间进行选择。 在另一个实施例中，公开了基于优先级的块过滤器合并。 根据相邻块集合中的集合成员的优先顺序，生成由相邻块集合中的相应集合成员使用的相应过滤器中选择的不超过第一数目的过滤器候选的过滤器合并列表。 在另一个实施例中，环路滤波器由同一组的多个图像单元中的重构视频共享。 过滤器合并组由连续组索引的差异来标识。