公开(公告)号：US20190387251A1

公开(公告)日：2019-12-19

申请号：US16444078

申请日：2019-06-18

Applicant: MEDIATEK INC.

Inventor： Zhi-Yi LIN ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU ,  Chen-Yen LAI ,  Yu-Wen HUANG

IPC: H04N19/583 ,  H04N19/159 ,  H04N19/132 ,  H04N19/105 ,  H04N19/43 ,  H04N19/176 ,  H04N19/186

Abstract: Exemplary video processing methods and apparatuses for coding a current block determine a number of OBMC blending lines for a boundary between a current block and a neighboring block according to motion information, a location of the current block, or a coding mode of the current block. OBMC is applied to the current block by blending an original predictor of the current block with an OBMC predictor for the number of OBMC blending lines. Some other exemplary video processing methods and apparatuses for coding a current block extend reference samples fetched from a buffer by a padding method to generate padded sample, and OBMC is applied to the current block or a neighboring block by blending an original predictor with an OBMC predictor generated from the extended reference samples.

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：US20180359494A1

公开(公告)日：2018-12-13

申请号：US15780544

申请日：2016-12-29

Applicant: MEDIATEK INC.

Inventor： Chih-Wei HSU ,  Ching-Yeh CHEN

IPC: H04N19/96 ,  H04N19/176 ,  H04N19/50 ,  H04N19/66 ,  H04N19/124

CPC classification number: H04N19/96 ,  H04N19/119 ,  H04N19/124 ,  H04N19/176 ,  H04N19/50 ,  H04N19/66 ,  H04N19/70

Abstract: A method and apparatus for partitioning a coding unit into one or more prediction units are disclosed. A prediction binary tree structure corresponding to a binary tree partitioning process for the current block is determined. The current block is partitioned into one or more prediction units according to the prediction binary tree structure. In the encoder side, a prediction process is applied to each prediction unit to generate prediction information for each prediction unit. The prediction information for each prediction unit associated with each prediction unit are encoded into a bitstream for the current block. In the decoder side, each prediction unit is reconstructed based on previous reconstructed data and prediction information of each prediction unit. The prediction information of each prediction unit are derived from the video bitstream. The current block is reconstructed based on the prediction units that are reconstructed according to the prediction binary tree structure derived.

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：US20230209060A1

公开(公告)日：2023-06-29

申请号：US18060633

申请日：2022-12-01

Applicant: MEDIATEK INC.

Inventor： Man-Shu CHIANG ,  Chih-Wei HSU

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: A method and apparatus for predictive coding. According to the method, combined prediction members are determined, where each of the combined prediction member includes a weighted sum of a first prediction candidate and a second prediction candidate using a target weighting selected from a weighting set. Boundary matching costs associated with the combined prediction members are determined, where each of the boundary matching costs is determined, for the combined prediction member with the target weighting, by using predicted samples of the current block based on the combined prediction member with the target weighting and neighbouring reconstructed samples of the current block. The current block is then encoded or decoded using a final combined prediction decided based on at least one of the boundary matching costs.

公开(公告)号：US20230156181A1

公开(公告)日：2023-05-18

申请号：US17685812

申请日：2022-03-03

Applicant: MEDIATEK INC.

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

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

CPC classification number: H04N19/105 ,  H04N19/46 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: A video coding method and apparatus include receiving input data associated with a current block, determining a coding mode for the current block by disabling Geometric Partitioning Mode (GPM) when a size of the current block is greater than or equal to a threshold size, and encoding or decoding the current block according to the determined coding mode. In a high-throughput video encoder performing Rate Distortion Optimization (RDO) by parallel Processing Elements (PEs), all or partial PEs receive search range reference samples in a broadcasting form. The parallel PEs test multiple coding modes on various partitioning for the current block, decide a block partitioning structure for dividing the current block into one or more coding blocks, and decide a coding mode for each of the coding blocks.

公开(公告)号：US20220256201A1

公开(公告)日：2022-08-11

申请号：US17608226

申请日：2020-04-30

Applicant: MEDIATEK INC.

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

IPC: H04N19/82 ,  H04N19/174 ,  H04N19/186 ,  H04N19/117 ,  H04N19/136

Abstract: Encoding methods and apparatuses comprise determining parameters of a specific process for a current slice, signaling in one or more Adaptive Parameter Sets (APSs), performing the specific process using the parameters, signaling an APS ID of each signaled APS in a slice header, and encoding the current slice. Each APS is classified into a category according to a type of data carried by the APS. The APS ID of each signaled APS is counted in a category associated with the specific process and is independent of other categories. Decoding methods and apparatuses comprise parsing an APS ID of each referenced APS from a slice header of a current slice for a specific process, determining parameters from each referenced APS according to the parsed APS ID and a category associated with the specific process, performing the specific process on the current slice and decoding the current slice.

公开(公告)号：US20220182629A1

公开(公告)日：2022-06-09

申请号：US17436824

申请日：2020-03-06

Applicant: MEDIATEK INC.

Inventor： Chen-Yen LAI ,  Olena CHUBACH ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU ,  Yu-Wen HUANG

IPC: H04N19/126 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

Abstract: A method and apparatus for video coding using a coding mode belonging to a mode group comprising an Intra Block Copy (IBC) mode and an Intra mode are disclosed. According to the present invention, for both IBC and Intra mode, a same default scaling matrix is used to derive the scaling matrix for a current block. In another embodiment, for the current block with block size of M×N or N×M, and M greater than N, a target scaling matrix is derived from an M×M scaling matrix by down-sampling the M×M scaling matrix to an M×N or N×M scaling matrix.

公开(公告)号：US20220150507A1

公开(公告)日：2022-05-12

申请号：US17437148

申请日：2020-03-13

Applicant: MEDIATEK INC.

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

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/513 ,  H04N19/159 ,  H04N19/176

Abstract: Exemplary video processing methods and apparatuses for encoding or decoding a current block by inter prediction are disclosed. Input data of a current block is received and partitioned into sub-partitions and motion refinement is independently performed on each sub-partition. A reference block for each sub-partition is obtained from one or more reference pictures according to an initial motion vector (MV). A refined MV for each sub-partition is derived by searching around the initial MV with N-pixel refinement. One or more boundary pixels of the reference block for a sub-partition is padded for motion compensation of the sub-partition. A final predictor for the current block is generated by performing motion compensation for each sub-partition according to its refined MV. The current block is then encoded or decoded according to the final predictor.

公开(公告)号：US20220103854A1

公开(公告)日：2022-03-31

申请号：US17426077

申请日：2020-01-22

Applicant: MEDIATEK INC.

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

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/593 ,  H04N19/119

Abstract: A method and apparatus of prediction for video coding are disclosed. According to one method, a block is partitioned into a first and second regions using a target partition selected from a partition set comprising triangle partition. A Merge candidate list is determined for a partitioned current block by including at least one HMVP (history-based motion vector prediction) candidate from an HMVP buffer, where the HMVP buffer stores motion information of previously coded blocks. The partitioned current block or current motion information associated with the partitioned current block are encoded or decoded using the Merge candidate list, where the Merge candidate list is used to derive a first candidate for the first region and a second candidate for the second region. In another method, whether to apply triangular CIIP (combined Inter/Intra prediction) to the current block is signaled at an encoder side or parsed at a decoder side.