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.

公开(公告)号：US20210385436A1

公开(公告)日：2021-12-09

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 ,  H04N19/159 ,  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：US20210329287A1

公开(公告)日：2021-10-21

申请号：US17260002

申请日：2019-07-18

Applicant: MEDIATEK INC.

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

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

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：US20210321098A1

公开(公告)日：2021-10-14

申请号：US17265957

申请日：2019-08-16

Applicant: MEDIATEK INC.

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

IPC: H04N19/119 ,  H04N19/70 ,  H04N19/124 ,  H04N19/176 ,  H04N19/186

Abstract: Video data processing methods and apparatuses receive input data associated with a current split node partitioned from a parent node by a splitting type, determine a depth of the current split node according to the splitting type, and compare the depth of the current split node with a maximum delta QP signaling depth. A video decoding system derives a delta QP from one or more syntax elements signaled in a TU associated with the current split node according to the comparing result, reconstructs a final QP for the current split node based on a reference QP and the delta QP, and decodes one or more TUs associated with the current split node using the final QP. The depth is counted in a way considering different splitting types and splitting partitions.

公开(公告)号：US20210274218A1

公开(公告)日：2021-09-02

申请号：US17326421

申请日：2021-05-21

Applicant: MEDIATEK INC.

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

IPC: H04N19/577 ,  H04N19/70

Abstract: A method and apparatus use an Inter coding tool and OBMC (Overlapped Block Motion Compensation). According to one implementation, a method of video coding using OBMC (Overlapped Block Motion Compensation) operates by receiving input data associated with a current block, wherein the input data correspond to pixel data to be coded at an encoder side or coded data to be decoded at a decoder side, applying the OBMC to the current block depending on one or more constraints, and signaling an OBMC syntax conditionally at the encoder side or parsing the OBMC syntax conditionally at the decoder side for the current block, wherein the OBMC syntax indicates whether the OBMC is applied to the current block.

公开(公告)号：US20210160527A1

公开(公告)日：2021-05-27

申请号：US17041655

申请日：2019-04-02

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

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. 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：US20210092394A1

公开(公告)日：2021-03-25

申请号：US17048208

申请日：2019-04-17

Applicant: MEDIATEK INC.

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

IPC: H04N19/132 ,  H04N19/119 ,  H04N19/176 ,  H04N19/70 ,  H04N19/96 ,  H04N19/172 ,  H04N19/61 ,  H04N19/46 ,  H04N19/159 ,  H04N19/186

Abstract: A method and apparatus for video coding using block partition are disclosed. According to the present invention, a partition structure corresponding to recursively partitioning a current block into smaller TU (transform unit) blocks until the partition structure reaches a maximum allowed split depth or until a block size of at least one of smaller TU blocks is a supported core transform size, where the current block is partitioned into final smaller TU blocks according to the partition structure. A transform coding process is applied to the current block according to the partition structure, where the transform coding process is skipped for at least one of the final smaller TU blocks. A flag can be signalled for the current block to indicate whether the current block is allowed to skip the transform coding process for said at least one of the final smaller TU blocks.

公开(公告)号：US20210084295A1

公开(公告)日：2021-03-18

申请号：US17021050

申请日：2020-09-15

Applicant: MEDIATEK INC.

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

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

Abstract: Methods and apparatus for cross-colour loop-filter processing of reconstructed video are disclosed. According to one method, a sum of filter coefficients for each of one or more candidate cross-colour loop filters is constrained to be a fixed value. One or more syntax elements indicating a value related to a total number of candidate filters in a filter set are signalled or parsed in the APS (Adaptation Parameter Set).

公开(公告)号：US20210076061A1

公开(公告)日：2021-03-11

申请号：US17047443

申请日：2019-04-15

Applicant: MEDIATEK INC.

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

IPC: H04N19/52 ,  H04N19/583 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: Exemplary video processing methods and apparatuses for coding a current block by overlapped sub-block motion compensation split the current block into overlapped sub-blocks, determine a sub-block MV for each overlapped sub-block, derive an initial predictor for each sub-block by motion compensation using the sub-block MV, derive a final predictor for each overlapped region by blending the initial predictors of the overlapped region, and encode or decode the current block based on the final predictors. Exemplary video processing methods and apparatuses for coding blocks with OBMC generate a converted MV by changing a MV to an integer MV or changing a MV component to an integer component, derive an OBMC region by motion compensation using the converted MVs, and encode or decode the blocks by blending an OBMC predictor with an original predictor.

公开(公告)号：US20210051345A1

公开(公告)日：2021-02-18

申请号：US17051269

申请日：2019-04-29

Applicant: MEDIATEK INC.

Inventor： Chia-Ming TSAI ,  Chun-Chia CHEN ,  Chih-Wei HSU ,  Ching-Yeh CHEN ,  Tzu-Der CHUANG

IPC: H04N19/85 ,  H04N19/159 ,  H04N19/176 ,  H04N19/52 ,  H04N19/96 ,  H04N19/139

Abstract: A video coder that implements illumination compensation is provided. The video coder receives a first block of pixels in a first video picture to be coded as a current block, wherein the current block is associated with a motion vector that references a second block of pixels in a second video picture as a reference block. The video coder performs inter-prediction for the current block by using the motion vector to generate a set of motion-compensated pixels for the current block. The video coder modifies the set of motion-compensated pixels of the current block by applying a linear model that is computed based on neighboring samples of the reference block and of the current block. The neighboring samples are identified based on a position of the current block within a larger block.