公开(公告)号：US11792401B2

公开(公告)日：2023-10-17

申请号：US17249667

申请日：2021-03-09

Applicant: MEDIATEK INC.

Inventor： Zhi-Yi Lin ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Chih-Wei Hsu

IPC: H04N19/132 ,  H04N19/105 ,  G06F17/16 ,  H04N19/176 ,  H04N19/159

CPC classification number: H04N19/132 ,  G06F17/16 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: Method and apparatus of video coding are disclosed. According to one method, the left reference boundary samples and the top reference boundary samples are checked jointly. According to another method, selected original left reference boundary samples and selected original top reference boundary samples at specific positions are used for predictor up-sampling. According to yet another method, the horizontal interpolation and the vertical interpolation are in a fixed order regardless of a shape of the current block, size of the current block or both.

公开(公告)号：US11695953B2

公开(公告)日：2023-07-04

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

CPC classification number: 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：US11425379B2

公开(公告)日：2022-08-23

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 ,  H04N19/184 ,  H04N19/146 ,  H04N19/132

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：US11051036B2

公开(公告)日：2021-06-29

申请号：US16507403

申请日：2019-07-10

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: Method and apparatus of using an Inter coding tool and OBMC (Overlapped Block Motion Compensation) are disclosed. According to one method, when the neighboring block is bi-prediction coded, the neighboring block is treated as a uni-prediction block by deriving an associated OBMC predictor based on uni-prediction motion information derived from the neighboring block. According to another method, when OBMC is applied depending on one or more constraints, an OBMC syntax is signaled conditionally at the encoder side or the OBMC syntax is parsed conditionally at the decoder side for the current block, where the OBMC syntax indicates whether the OBMC is applied to the current block.

公开(公告)号：US20190327482A1

公开(公告)日：2019-10-24

申请号：US16392040

申请日：2019-04-23

Applicant: MediaTek Inc.

Inventor： Zhi-Yi Lin ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Man-Shu Chiang ,  Chih-Wei Hsu

IPC: H04N19/513 ,  H04N19/176

Abstract: A video coder implementing affine prediction is provided. The video coder receives input data associated with a current block to be coded. The video coder derives a control point motion vector (CPMV) of the current block according to an affine model. The video coder derives a set of motion compensation motion vectors (MCMVs) for a set of sub-blocks of the current block based on the derived CPMV of the current block according to the affine model. The video coder performs motion compensation for the current block based on the set of MCMVs. The CPMV of the current block is derived based on a CPMV of a first reference block that is a neighboring block located in a same region of the current block or an MCMV of a second reference block that is not a neighboring block located in the same region of the current block.

公开(公告)号：US11785258B2

公开(公告)日：2023-10-10

申请号：US16980920

申请日：2019-03-25

Applicant: MEDIATEK INC.

Inventor： Shih-Ta Hsiang ,  Zhi-Yi Lin ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Chih-Wei Hsu

IPC: H04N19/70 ,  H04N19/119 ,  H04N19/176 ,  H04N19/96

CPC classification number: H04N19/70 ,  H04N19/119 ,  H04N19/176 ,  H04N19/96

Abstract: A method and apparatus of video coding for a video encoding system or video decoding system are disclosed. According to one method, the current block region is partitioned into one or more leaf blocks using quadtree (QT) partition and/or 1D (one-dimensional) partition by firstly signalling or parsing a first syntax element to indicate whether the current block region is split into multiple smaller blocks. According to a second method, a target syntax model from multiple syntax models is determined. The current block region is partitioned into one or more leaf blocks using QT partition and/or 1D partition and signalling block partition information according to the target syntax model at an encoder side, or the block partition information is parsed according to the target syntax model and the current block region is partitioned into one or more leaf blocks at a decoder side.

公开(公告)号：US11589050B2

公开(公告)日：2023-02-21

申请号：US17414662

申请日：2019-12-10

Applicant: MEDIATEK INC.

Inventor： Zhi-Yi Lin ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Chia-Ming Tsai

IPC: H04N19/119 ,  H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/70 ,  H04N19/186 ,  H04N19/176

Abstract: Video processing methods comprise receiving input data of a current block, checking whether the current block is a root block by considering one or more predefined criteria, applying a mode constraint, a chroma split constraint, or both the mode and chroma split constraints to the current block if the current block is set to be a root block, and encoding or decoding the current block. The mode constraint restricts all blocks split from the current block to be processed by a same prediction mode and the chroma split constraints prohibits chroma components of the current block to be further partitioned while allowing a luma component of the current block to be partitioned into smaller blocks.

公开(公告)号：US11503300B2

公开(公告)日：2022-11-15

申请号：US17057349

申请日：2019-05-24

Applicant: MEDIATEK INC.

Inventor： Zhi-Yi Lin ,  Tzu-Der Chuang ,  Ching-Yeh Chen

IPC: H04N7/12 ,  H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  G06T3/00

Abstract: Method and apparatus for coding system using affine motion model are disclosed. According to one method, a neighbouring block set of the current block comprising multiple spatial neighbouring blocks and one or more collocated blocks is determined for the current block. One or more constructed affine MVP candidates are derived for an affine MVP candidate list based on CP (control-point) MVs (motion vectors) at multiple spatial neighbouring blocks and said one or more collocated blocks. One constructed affine MVP candidate without one temporal MV is checked and inserted into the affine MVP candidate list before any constructed affine MV with one temporal MV. The current block or motion information of the current block is then encoded or decoded based on the affine MVP candidate list.

公开(公告)号：US11381808B2

公开(公告)日：2022-07-05

申请号：US16850210

申请日：2020-04-16

Applicant: MEDIATEK INC.

Inventor： Zhi-Yi Lin ,  Tzu-Der Chuang ,  Ching-Yeh Chen

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/593

Abstract: An intra prediction method includes receiving input data of a current block in a current picture, deriving reference samples of the current block from boundary samples, selecting a matrix for the current block, generating intermediate predicted samples by multiplying the reference samples and the matrix, and clipping the intermediate predicted samples before up-sampling. The intra prediction method further includes performing an up-sampling process on the clipped intermediate predicted samples to generate predicted samples for the current block, and encoding or decoding the current block according to the predicted samples of the current block.

公开(公告)号：US20210360280A1

公开(公告)日：2021-11-18

申请号：US17386407

申请日：2021-07-27

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 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/583

Abstract: Exemplary video processing methods and apparatuses for coding a current block. One implementation operates by receiving input video data associated with a current block in a current picture; determining one or more Motion Vectors (MVs) for generating an OBMC region; generating one or more converted MVs by changing said one or more MVs to one or more integer MVs or changing a MV component of said one or more MVs to an integer component; deriving the OBMC region by motion compensation using said one or more converted MVs; applying OBMC by blending an OBMC predictor in the OBMC region with an original predictor; and encoding or decoding the current block.