公开(公告)号：US11882276B2

公开(公告)日：2024-01-23

申请号：US17494710

申请日：2021-10-05

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh Chen ,  Tzu-Der Chuang ,  Yu-Wen Huang

IPC: H04N19/117 ,  H04N19/96 ,  H04N19/182

CPC classification number: H04N19/117 ,  H04N19/182 ,  H04N19/96

Abstract: According to a method for Adaptive Loop Filter (ALF) processing of reconstructed video, multiple indicators are signaled in slice at an encoder side or parsed at a decoder side, where the multiple indicators are Adaptive Parameter Set (APS) indices associated with temporal ALF filter sets for the ALF processing. A current indicator is determined from the multiple indicators, where the current indicator is used to select a current ALF filter set. Filtered-reconstructed pixels are derived for the current block by applying the current ALF filter to the current block. In another method, if the ALF processing applied at a target sample requires an outside sample on other side of a target virtual boundary from the target sample, the outside sample is replaced by a padded sample.

公开(公告)号：US11838557B2

公开(公告)日：2023-12-05

申请号：US17726713

申请日：2022-04-22

Applicant: MEDIATEK INC.

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

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/124 ,  H04N19/186 ,  H04N19/147

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/124 ,  H04N19/147 ,  H04N19/186

Abstract: Video encoding methods and apparatuses include receiving reconstructed video samples, determining an initial clipping setting for ALF coefficients, deriving clipping setting candidates from the initial clipping setting. ALF coefficients for the initial clipping setting and the clipping setting candidates are derived by solving inverse matrices, where partial intermediate results of solving ALF coefficients are shared by two or more clipping settings. A distortion value corresponds to the derived ALF coefficients for each clipping setting is computed, and final clipping indices for final ALF coefficients are determined according to the distortion values. ALF filtering is applied to the reconstructed video samples based on the final ALF coefficients and the final clipping indices.

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：US20230199217A1

公开(公告)日：2023-06-22

申请号：US17992797

申请日：2022-11-22

Applicant: MediaTek Inc.

Inventor： Cheng-Yen Chuang ,  Man-Shu Chiang ,  Yu-Ling Hsiao ,  Chun-Chia Chen ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/577 ,  H04N19/176 ,  H04N19/172 ,  H04N19/154 ,  H04N19/52

CPC classification number: H04N19/577 ,  H04N19/176 ,  H04N19/172 ,  H04N19/154 ,  H04N19/52

Abstract: A video encoder receives raw pixel data to be encoded as a current block of a current picture of a video into a bitstream. The video encoder identifies multiple candidate bi-prediction positions for the current block, including a center position, a first set of offset positions, and a second set of offset positions. The first set of offset positions and the second set of offset positions interleave each other. The encoder computes distortion values for each of the candidate bi-prediction positions based on several possible weighting parameter values. The distortion values for the center position are based on each of the several possible weighting parameter values. The distortion values for the first set of offset positions are based on a first subset of the possible weighting parameter values. The distortion values for the second set of offset positions are based on a second subset of the possible weighting parameter values.

公开(公告)号：US11659198B2

公开(公告)日：2023-05-23

申请号：US17226354

申请日：2021-04-09

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/52 ,  H04N19/56 ,  H04N19/577 ,  H04N19/44 ,  H04N19/176 ,  H04N19/184

CPC classification number: H04N19/52 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44 ,  H04N19/56 ,  H04N19/577

Abstract: Method and apparatus of video coding using decoder derived motion information based on bilateral matching or template matching are disclosed. According to one method, merge index for merge candidate group comprising bilateral matching merge candidate and/or template matching merge candidate are signalled using different codewords. According to another method, the first-stage MV or the first-stage MV pair is used as an only initial MV or MV pair or used as a central MV of search window for second-stage search. According to yet another method, after the reference template for a first reference list is found, the current template is modified for template search in the other reference list. According to yet another method, the sub-PU search is disabled for the template search. According to yet another method, block difference calculation is based on reduced bit depth during MV search associated with the decoder-side MV derivation process.

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：US11589041B2

公开(公告)日：2023-02-21

申请号：US17526678

申请日：2021-11-15

Applicant: MEDIATEK INC.

Inventor： Yu-Wen Huang ,  Yu-Chen Sun ,  Tzu-Der Chuang ,  Jian-Liang Lin ,  Ching-Yeh Chen

IPC: H04N19/117 ,  G06N3/04 ,  G06T5/00 ,  H04N19/182 ,  H04N19/50 ,  H04N19/82 ,  H04N19/86 ,  G06N3/084 ,  G06N3/088 ,  H04N19/91 ,  G06N3/08

Abstract: A method and apparatus of video coding incorporating Deep Neural Network are disclosed. A target signal is processed using DNN (Deep Neural Network), where the target signal provided to DNN input corresponds to the reconstructed residual, output from the prediction process, the reconstruction process, one or more filtering processes, or a combination of them. The output data from DNN output is provided for the encoding process or the decoding process. The DNN can be used to restore pixel values of the target signal or to predict a sign of one or more residual pixels between the target signal and an original signal. An absolute value of one or more residual pixels can be signalled in the video bitstream and used with the sign to reduce residual error of the target signal.

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：US11470348B2

公开(公告)日：2022-10-11

申请号：US17265976

申请日：2019-08-16

Applicant: MEDIATEK INC.

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

IPC: H04N19/577 ,  H04N19/176 ,  H04N19/105 ,  H04N19/70 ,  H04N19/52

Abstract: Exemplary video processing methods and apparatuses for encoding or decoding a current block by bi-directional prediction. Multiple weight sets are utilized for blending List 0 and List 1 predictors, and the selection among multiple weight sets may be implicitly determined based on video information. Each weight set is composed of multiple candidate weights, and one candidate weight is selected for the current block. A weight pair associated with the selected weight for the current block is used for weighted averaging List 0 and List 1 predictors of the current block to generate a final inter predictor. The video processing methods and apparatuses encode or decode the current block according to the final inter predictor of the current block.

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.