公开(公告)号：US20230328278A1

公开(公告)日：2023-10-12

申请号：US18181858

申请日：2023-03-10

Applicant: MEDIATEK INC.

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

IPC: H04N19/583 ,  H04N19/105 ,  H04N19/176

CPC classification number: H04N19/583 ,  H04N19/176 ,  H04N19/105

Abstract: A method and apparatus for Overlapped Boundary Motion Compensation (OBMC) are provided. According to the method, input data associated with a current block is received, wherein the input data includes pixel data for the current block to be encoded at an encoder side or coded data associated with the current block to be decoded at a decoder side. An inter prediction tool from a set of inter-prediction coding tools is determined for the current block. An OBMC subblock size for the current block is determined based on information related to the inter prediction tool selected for the current block or the inter prediction tool of a neighboring block. Subblock OBMC is applied to a subblock boundary between a neighboring subblock and a current subblock of the current block according to the OBMC subblock size.

公开(公告)号：US20230224455A1

公开(公告)日：2023-07-13

申请号：US18065179

申请日：2022-12-13

Applicant: MEDIATEK INC.

Inventor： Man-Shu CHIANG ,  Chun-Chia CHEN ,  Chih-Wei HSU ,  Shih-Ta HSIANG ,  Ching-Yeh CHEN ,  Tzu-Der CHUANG ,  Yu-Wen HUANG

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/139 ,  H04N19/70

CPC classification number: H04N19/105 ,  H04N19/176 ,  H04N19/139 ,  H04N19/70

Abstract: A method and apparatus for video coding. According to the method, a set of candidates associated with coding modes or mode parameters are determined. Boundary matching costs associated with the set of candidates are determined, where each of the boundary matching costs is determined for one target candidate of the set of candidates. The costs are calculated by using reconstructed or predicted samples of the current block and one or more neighboring blocks of the current block. Each of the boundary matching costs is calculated using one target configuration selected from a plurality of configurations. A final candidate is selected from the set of candidates based on the boundary matching costs. The current block is encoded or decoded using the final candidate.

公开(公告)号：US20220224886A1

公开(公告)日：2022-07-14

申请号：US17614712

申请日：2020-05-28

Applicant: MEDIATEK INC.

Inventor： Chia-Ming TSAI ,  Chih-Wei HSU

IPC: H04N19/105 ,  H04N19/80 ,  H04N19/186 ,  H04N19/176

Abstract: Video processing methods and apparatuses for coding a current block and a adjacent block comprise receiving input data of the current and adjacent blocks in a current picture, determines the current and adjacent blocks are both coded in a BDPCM or RDPCM mode, performing a deblocking filtering operation on an edge between the current and adjacent blocks by de-activating deblocking filtering for a first color component and activating deblocking filtering for a second color component, and encoding or decoding the current and adjacent blocks. Each current pixel in a BDPCM coded block is predicted by one or more neighboring pixels of the current pixel. RDPCM is applied to process quantized residues of a RDPCM coded block according to a prediction direction of the RDPCM coded block.

公开(公告)号：US20220210470A1

公开(公告)日：2022-06-30

申请号：US17619788

申请日：2020-06-24

Applicant: MEDIATEK INC.

Inventor： Zhi-Yi LIN ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/172 ,  H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/61 ,  H04N19/18 ,  H04N19/70

Abstract: An image or video processing method comprises receiving input data of a current block, mapping an MIP mode index to a default mode, and encoding or decoding the current block by referencing the default mode. Another image or video processing method comprises receiving input data of a current block coded or to be coded by an MIP mode, and parsing or signaling a transpose flag for the current block indicating whether transposing is applied in coding the current block. Reference samples of the current block are prepared from neighboring boundary samples according to the transpose flag. A matrix is selected to be multiplied to the reference samples to generate predicted samples. A transposing process is adaptively applied to the current block according to the transpose flag, and the predicted samples are used to encode or decode the current block.

公开(公告)号：US20220150496A1

公开(公告)日：2022-05-12

申请号：US17614703

申请日：2020-05-29

Applicant: MEDIATEK INC.

Inventor： Zhi-Yi LIN ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU

IPC: H04N19/119 ,  H04N19/132 ,  H04N19/146 ,  H04N19/184

Abstract: A method and apparatus of video coding are disclosed. A piece-wise linear mapping is derived to map a target luma sample from a first signal domain to a second signal domain, or vice versa. The piece-wise linear mapping process comprises determining first pivot points for performing video encoding or decoding of the luma samples using a piece-wise linear mapping. The first pivot points are determined so that: if a target mapped pivot point corresponding to one first pivot point in the second signal domain has a multiple of the target interval value, the target mapped pivot point and a next mapped pivot point can be located in a same second segment; and otherwise, the target mapped pivot point and the next mapped pivot point cannot be located in the same second segment.

公开(公告)号：US20220094966A1

公开(公告)日：2022-03-24

申请号：US17545011

申请日：2021-12-08

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chen-Yen LAI ,  Chih-Wei HSU

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/533

Abstract: Video processing methods and apparatuses for coding a current block comprise receiving input data of a current block, partitioning the current block into multiple sub-blocks, deriving sub-block MVs for the current block according to a sub-block motion compensation coding tool, constraining the sub-block MVs to form constrained sub-block MVs, and encoding or decoding the current block using the constrained sub-block MVs, and applying motion compensation to the current block using the constrained sub-block MVs to encode or decode the current block. The sub-block MVs may be constrained according to a size, width, or height of the current block or a sub-block, an inter prediction direction of one of control point MVs of the current block, the current block, or current sub-block, the control point MVs, or a combination of the above.

公开(公告)号：US20220094922A1

公开(公告)日：2022-03-24

申请号：US17420837

申请日：2019-12-24

Applicant: MEDIATEK INC.

Inventor： Chia-Ming TSAI ,  Chih-Wei HSU ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG ,  Shih-Ta HSIANG

IPC: H04N19/119 ,  H04N19/96 ,  H04N19/169 ,  H04N19/176

Abstract: Video processing methods and apparatuses in a video encoding or decoding system for processing out-of-bounds nodes in a current picture. An out-of-bounds node is a coding tree node with a block region across a current picture boundary. The video processing method or apparatus determines an inferred splitting type, applies the inferred splitting type to split the out-of-bounds node into child blocks, adaptively splits each child block into one or multiple leaf blocks, and encodes or decodes the leaf blocks in the out-of-bounds node inside the current picture. The inferred splitting type for partitioning out-of-bounds nodes in an inter slice, picture, or tile is the same as the inferred splitting type for partitioning out-of-bounds nodes in an intra slice, picture, or tile.

公开(公告)号：US20220086478A1

公开(公告)日：2022-03-17

申请号：US17537699

申请日：2021-11-30

Applicant: MEDIATEK INC.

Inventor： Man-Shu CHIANG ,  Chih-Wei HSU ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/80

Abstract: A method and apparatus of Inter prediction for video coding using Multi-hypothesis (MH) are disclosed. If an MH mode is used for the current block: at least one MH candidate is derived using reduced reference data by adjusting at least one coding-control setting; an Inter candidate list is generated, where the Inter candidate list comprises said at least one MH candidate; and current motion information associated with the current block is encoded using the Inter candidate list at the video encoder side or the current motion information associated with the current block is decoded at the video decoder side using the Merge candidate list. The coding control setting may correspond to prediction direction setting, filter tap setting, block size of reference block to be fetched, reference picture setting or motion limitation setting.

公开(公告)号：US20210314571A1

公开(公告)日：2021-10-07

申请号：US17218320

申请日：2021-03-31

Applicant: MEDIATEK INC.

Inventor： Yu-Wen HUANG ,  Lulin CHEN ,  Chih-Wei HSU

IPC: H04N19/132 ,  H04N19/119 ,  H04N19/192 ,  H04N19/46 ,  H04N19/70 ,  H04N19/186 ,  H04N19/176

Abstract: Video processing methods and apparatuses include receiving input data associated with a current picture composed of multiple Coding Tree Units (CTUs) for encoding or decoding, partitioning the current picture into one or more slices including raster scan slices or rectangular slices, and for each slice in the current picture, encoding or decoding each slice by always processing CTUs within each slice in a raster scan order. Each slice includes an integer number of complete CTUs in the current picture that are exclusively contained in a single Network Access Layer (NAL) unit. Tile partition and tile concept may be removed to reduce the coding complexity of video processing.

公开(公告)号：US20210281873A1

公开(公告)日：2021-09-09

申请号：US16330122

申请日：2017-09-05

Applicant: MEDIATEK INC.

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

IPC: H04N19/52 ,  H04N19/96 ,  H04N19/176 ,  H04N19/119 ,  H04N19/46

Abstract: Video processing methods and apparatuses for candidate set determination for binary-tree splitting blocks comprise receiving input data of a current block partitioned from a parent block by binary-tree splitting, determining a candidate set for the current block by prohibiting a spatial candidate derived from a neighboring block partitioned from the same parent block or determining the candidate set for the current block by conducting a pruning process if the neighboring block is coded in Inter prediction, 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 block, and removing the candidate equals to the spatial candidate from the candidate set.