公开(公告)号：US20140198844A1

公开(公告)日：2014-07-17

申请号：US14239349

申请日：2012-10-19

Applicant: MEDIATEK INC.

Inventor： Chih-Wei Hsu ,  Chia-Yang Tsai ,  Yu-Wen Huang

IPC: H04N19/117 ,  H04N19/154

CPC classification number: H04N19/70 ,  H04N19/117 ,  H04N19/154 ,  H04N19/174 ,  H04N19/436 ,  H04N19/82

Abstract: A method and apparatus for loop filter processing of video data are disclosed. Embodiments according to the present invention eliminate data dependency associated with loop processing across tile boundaries. According to one embodiment, loop processing is reconfigured to eliminate data dependency across tile boundaries if cross-tile loop processing is disabled. The loop filter processing corresponds to DF (deblocking filter), SAO (Sample Adaptive Offset) processing or ALF (Adaptive Loop Filter) processing. The processing can be skipped for at least one tile boundary. In another embodiment, data padding based on the pixels of the current tile or modifying pixel classification footprint are used to eliminate data dependency across the tile boundary. Whether cross-tile loop processing is disabled can be indicated by a flag coded at sequence, picture, or slice level to indicate whether the data dependency across said at least one tile boundary is allowed.

Abstract translation: 公开了一种用于视频数据的环路滤波处理的方法和装置。 根据本发明的实施例消除了跨越块边界的循环处理相关的数据依赖性。 根据一个实施例，如果禁止跨平铺环路处理，则重新配置循环处理以消除跨块边界的数据依赖性。 环路滤波处理对应于DF（去块滤波器），SAO（采样自适应偏移）处理或ALF（自适应环路滤波器）处理。 可以跳过至少一个瓦片边界的处理。 在另一个实施例中，使用基于当前瓦片的像素或修改像素分类覆盖区的数据填充来消除跨平铺边界的数据依赖性。 可以通过在序列，图片或切片级别编码的标志来指示是否禁止交叉平铺循环处理，以指示是否允许跨所述至少一个瓦片边界的数据依赖。

公开(公告)号：US11956421B2

公开(公告)日：2024-04-09

申请号：US17609702

申请日：2020-05-07

Applicant: MEDIATEK INC.

Inventor： Man-Shu Chiang ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang ,  Shih-Ta Hsiang

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/137

Abstract: Method and apparatus of video coding are disclosed. According to one method, in the decoder side, a predefined Intra mode is assigned to a neighboring block adjacent to the current luma block when the neighboring block satisfies one or more conditions. An MPM (Most Probable Mode) list is derived based on information comprising at least one of neighboring Intra modes. A current Intra mode is derived utilizing the MPM list. The current luma block is decoded according to the current Intra mode According to another method, a predefined Intra mode is assigned to a neighboring block adjacent to the current luma block if the neighboring block is coded in BDPCM (Block-based Delta Pulse Code Modulation) mode, where the predefined Intra mode is set to horizontal mode or vertical mode depending on prediction direction used by the BDPCM mode.

公开(公告)号：US11882270B2

公开(公告)日：2024-01-23

申请号：US17341879

申请日：2021-06-08

Applicant: MEDIATEK INC.

Inventor： Shih-Ta Hsiang ,  Lulin Chen ,  Chih-Wei Hsu ,  Olena Chubach

IPC: H04N19/105 ,  H04N19/172 ,  H04N19/46 ,  H04N19/159

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/46

Abstract: Method and apparatus for signaling or parsing constrained active entries in reference picture lists for multi-layer coding are disclosed. For the decoder side, when the current picture is a RADL (Random Access Decodable Leading) picture, reference picture list 0 or reference picture list 1 of the current picture is mandatorily required to contain no active entry corresponding to a RASL (Random Access Skipped Leading) picture with pps_mixed_nalu_types_in_pic_flag equal to 0 or a picture that precedes an associated IRAP (Intra Random Access Point) picture in decoding order, and wherein an active entry in the reference picture list 0 or the reference picture list 1 of the RADL picture can refer to a RASL picture with the pps_mixed_nalu_types_in_pic_flag equal to 1 and a referenced RASL picture either belongs to the same layer or a different layer than a layer containing the current picture which is the RADL picture.

公开(公告)号：US11805245B2

公开(公告)日：2023-10-31

申请号：US17874009

申请日：2022-07-26

Applicant: MediaTek Inc.

Inventor： Chih-Yao Chiu ,  Chun-Chia Chen ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Tzu-Der Chuang ,  Yu-Wen Huang

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/182 ,  H04N19/136

CPC classification number: H04N19/105 ,  H04N19/136 ,  H04N19/176 ,  H04N19/182

Abstract: For each prediction candidate of a set of one or more prediction candidates of the current block, a video coder computes a matching cost between a set of reference pixels of the prediction candidate in a reference picture and a set of neighboring pixels of a current block in a current picture. The video coder identifies a subset of the reference pictures as major reference pictures based on a distribution of the prediction candidates among the reference pictures of the current picture. A bounding block is defined for each major reference picture, the bounding block encompassing at least portions of multiple sets of reference pixels for multiple prediction candidates. The video coder assigns an index to each prediction candidate based on the computed matching cost of the set of prediction candidates. A selection of a prediction candidate is signaled by using the assigned index of the selected prediction candidate.

公开(公告)号：US11743458B2

公开(公告)日：2023-08-29

申请号：US17286713

申请日：2019-10-18

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh Chen ,  Tzu-Der Chuang ,  Yu-Chi Su ,  Chih-Wei Hsu ,  Yu-Wen Huang

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/80

CPC classification number: H04N19/117 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/80

Abstract: Methods and apparatus for in-loop processing of reconstructed video are disclosed. According to one method, a virtual boundary is determined for to-be-processed pixels in the current picture, where the virtual boundary is aligned with block boundaries and at least one to-be-processed pixel on a first side of the virtual boundary requires one or more second pixels on a second side of the virtual boundary. According to the method, the in-loop processing is modified if a target to-be-processed pixel requires at least one second pixel from the second side of the virtual boundary and the modified in-loop processing eliminates the need for any second pixel on the second side of the virtual boundary. According to another method, the operations of block classification are changed when part of the required pixels in one 10×10 window used in classification are at the other side of virtual boundaries.

公开(公告)号：US11616966B2

公开(公告)日：2023-03-28

申请号：US16836904

申请日：2020-03-31

Applicant: MediaTek Inc.

Inventor： Man-Shu Chiang ,  Chih-Wei Hsu

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/625 ,  H04N19/159 ,  H04N19/132

Abstract: A video decoder receives data from a bitstream for a block of pixels to be decoded as a current block of a current picture of a video. The video decoder receives from the bitstream first and second signaled indices for the current block. The video decoder determines first and second merge indices from the first and second signaled indices. The video decoder uses the first and second merge indices to select first and second motion candidates, respectively. The video decoder generates a set of prediction samples in ALWIP mode and performs an inverse secondary transform and an inverse primary transform to generate a set of residual samples of the current block. Enabling or selection of secondary transform and/or primary transform depends on size, width, and/or height for the current block. The video decoder reconstructs the current block by using the set of residual samples and the set of prediction samples.

公开(公告)号：US11582454B2

公开(公告)日：2023-02-14

申请号：US17441795

申请日：2020-03-23

Applicant: MEDIATEK INC.

Inventor： Chen-Yen Lai ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Chih-Wei Hsu ,  Yu-Wen Huang ,  Olena Chubach

IPC: H04N19/126 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/61 ,  H04N19/70

Abstract: A method and apparatus for video coding utilizing a current block, a maximum side of the transform block of the current block corresponds to 64. A scaling matrix is derived from elements of an 8×8 base scaling matrix, where the elements in a bottom-right 4×4 region of the 8×8 base scaling matrix are skipped, either not signaled or set to zero. According to another method, a current block belongs to a current picture in a first color format that has only a first color component. A first scaling matrix is signaled at the video encoder side or parsed at the video decoder side for the first color component of the current block. Signaling any second scaling matrix is disabled at the video encoder side or parsing any second scaling matrix is disabled at the video decoder side for a second or third color component of the current block.

公开(公告)号：US11575905B2

公开(公告)日：2023-02-07

申请号：US17768622

申请日：2020-11-25

Applicant: MEDIATEK INC.

Inventor： Yu-Ling Hsiao ,  Chun-Chia Chen ,  Chih-Wei Hsu

IPC: H04N19/137 ,  H04N19/176 ,  H04N19/59

Abstract: A method and apparatus for video coding are disclosed. According to this method, a current block is received at an encoder side or compressed data comprising the current block is received at a decoder side, where the current block is partitioned into two geometric prediction units. Motion information for the two geometric prediction units is determined. Weighting information for the two geometric prediction units is determined. A motion storage type variable based on the weighting information is determined, where the motion information associated with the current block is stored according to a value of the motion storage type variable. A geometric predictor for the current block is generated by blending two geometric predictors according to the weighting information, where the two geometric predictors are derived for the two geometric prediction units using the motion information associated with the current block.

公开(公告)号：US11539939B2

公开(公告)日：2022-12-27

申请号：US17104037

申请日：2020-11-25

Applicant: MEDIATEK INC.

Inventor： Chih-Yao Chiu ,  Chun-Chia Chen ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Yu-Wen Huang ,  Tzu-Der Chuang

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/30 ,  H04N19/46 ,  H04N19/52

Abstract: Video processing methods and apparatuses for processing a current block in a current picture include receiving input data of the current block, determining a reference picture, determining whether picture sizes of the current and reference pictures are different, determining whether horizontal wraparound motion compensation is enabled for predicting the current block, performing motion compensation for the current block to obtain a reference block from the reference picture, and encoding or decoding the current block according to the reference block. Horizontal wraparound motion compensation is disabled when the picture sizes of the current and reference pictures are different.

公开(公告)号：US11503329B2

公开(公告)日：2022-11-15

申请号：US17265949

申请日：2019-08-15

Applicant: MEDIATEK INC.

Inventor： Chun-Chia Chen ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen

IPC: H04N19/52 ,  H04N19/96 ,  H04N19/105 ,  H04N19/119

Abstract: A method and apparatus of Inter prediction for video coding are disclosed. According to one method, a sub-block motion vector prediction (MVP) mode is turned off for small size coding units (CUs). In another method, if the neighbouring reference block for a current coding unit (CU) is in a root CU region, the neighbouring reference block is not used to derive a Merge candidate or a modified neighbouring reference block on the shared boundary of the root CU is used to derive the Merge candidate for the current block. In yet another method, a shared sub-block Merge candidate list is derived for sub-CUs within a root CU region or an MER (Merge estimation region). If a neighbouring reference block is within the same MER as a current sub-CU, the neighbouring reference block is not used for deriving a candidate for the shared sub-CU Merge list.