公开(公告)号：US11438611B2

公开(公告)日：2022-09-06

申请号：US17117724

申请日：2020-12-10

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Chia-Ming Tsai ,  Chun-Chia Chen ,  Olena Chubach ,  Yu-Wen Huang

IPC: H04N19/33 ,  H04N19/132 ,  H04N19/172 ,  H04N19/184

Abstract: Method and apparatus of coding a video sequence, are disclosed. According to the method, a bitstream corresponding to encoded data of the video sequence is generated at an encoder side or received at a decoder side, where the bitstream complies with a bitstream conformance that one or more constraints are satisfied. The constraints are related to a set of RPR (Reference Picture Resampling) parameters including scaling window width or height of a current picture, scaling window width or height of a reference picture, current picture width or height, and maximum picture width or height specified for the video sequence. Scaling information for the RPR mode is derived using the set of RPR parameters. A target picture of the video sequence is then encoded at the encoder side or decoded at the decoder side by utilizing the scaling information when the RPR mode is enabled for the target picture.

公开(公告)号：US11272182B2

公开(公告)日：2022-03-08

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：US20200275112A1

公开(公告)日：2020-08-27

申请号：US16802448

申请日：2020-02-26

Applicant: MediaTek Inc.

Inventor： Man-Shu Chiang ,  Chun-Chia Chen ,  Chih-Wei Hsu ,  Chia-Ming Tsai

IPC: H04N19/44 ,  H04N19/107 ,  H04N19/159 ,  H04N19/176

Abstract: A video decoder that implements a mutually exclusive grouping of coding modes is provided. The video decoder receives data for a block of pixels to be decoded as a current block of a current picture of a video. When a first coding mode for the current block is enabled, a second coding mode is disabled for the current block, wherein the first and second coding modes specify different methods for computing an inter-prediction for the current block. The current block is decoded by using an inter-prediction that is computed according to an enabled coding mode.

公开(公告)号：US12143580B2

公开(公告)日：2024-11-12

申请号：US17260008

申请日：2019-07-12

Applicant: MEDIATEK INC.

Inventor： Chia-Ming Tsai ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Tzu-Der Chuang ,  Yu-Wen Huang

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/186 ,  H04N19/436 ,  H04N19/70 ,  H04N19/96 ,  H04N19/174

Abstract: Video processing methods and apparatuses in a video encoding or decoding system for processing a video picture partitioned into blocks with one or more partition constraints. The video encoding or decoding system receives input data of a current block and checks whether a predefined splitting type is allowed to partition the current block according to first and second constraints. The first constraint restricts each sub-block partitioned from the current block to be completely contained in one pipeline unit, and the second constraint restricts each sub-block partitioned from the current block to contain one or more complete pipeline units. The pipeline units are non-overlapping units in the video picture designed for pipeline processing. The current block is not partitioned by the predefined splitting type if any sub-block partitioned by the predefined splitting type violates both the first and second constraints. The system encodes or decodes the current block.

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：US11343541B2

公开(公告)日：2022-05-24

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: H04N19/52 ,  H04N19/85 ,  H04N19/96 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/117

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.

公开(公告)号：US11178414B2

公开(公告)日：2021-11-16

申请号：US16802455

申请日：2020-02-26

Applicant: MediaTek Inc.

Inventor： Man-Shu Chiang ,  Chun-Chia Chen ,  Chih-Wei Hsu ,  Chia-Ming Tsai

IPC: H04N7/12 ,  H04N19/44 ,  H04N19/176 ,  H04N19/159 ,  H04N19/107 ,  H04N19/46 ,  H04N19/189

Abstract: A video codec receives data to be encoded or decoded as a current block of a current picture of a video. first and/or second flags indicate whether to apply a first combined prediction mode or a second combined prediction mode. The video codec decodes or encodes the current block. When the combined inter and intra prediction mode is applied, the current block is coded by using a combined prediction that is generated based on an inter-prediction and an intra-prediction. When the triangle prediction mode is applied, the current block is coded by using a combined prediction that is generated based on at least two inter-predictions.

公开(公告)号：US11166037B2

公开(公告)日：2021-11-02

申请号：US16802448

申请日：2020-02-26

Applicant: MediaTek Inc.

Inventor： Man-Shu Chiang ,  Chun-Chia Chen ,  Chih-Wei Hsu ,  Chia-Ming Tsai

IPC: H04N7/12 ,  H04N19/44 ,  H04N19/176 ,  H04N19/159 ,  H04N19/107 ,  H04N19/46 ,  H04N19/189

Abstract: A video decoder that implements a mutually exclusive grouping of coding modes is provided. The video decoder receives data for a block of pixels to be decoded as a current block of a current picture of a video. When a first coding mode for the current block is enabled, a second coding mode is disabled for the current block, wherein the first and second coding modes specify different methods for computing an inter-prediction for the current block. The current block is decoded by using an inter-prediction that is computed according to an enabled coding mode.

公开(公告)号：US11516513B2

公开(公告)日：2022-11-29

申请号：US16977158

申请日：2019-03-13

Applicant: MEDIATEK INC.

Inventor： Chun-Chia Chen ,  Chia-Ming Tsai ,  Yu-Chi Su ,  Chen-Yen Lai ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Tzu-Der Chuang ,  Yu-Wen Huang ,  Han Huang

IPC: H04N19/70 ,  H04N19/174 ,  H04N19/64 ,  H04N19/66 ,  H04N19/89

Abstract: In one method, the current block is partitioned into multiple final sub-blocks using one or more stages of sub-tree partition comprising ternary tree partition and at least one other-type partition, where ternary partition tree is excluded from the sub-tree partition if a current sub-tree depth associated with a current sub-block is greater than a first threshold and the first threshold is an integer greater than or equal to 1. In another method, if a test condition is satisfied, the current block is encoded or decoded using a current Inter mode selected from a modified group of Inter tools, where the modified group of Inter tools is derived from an initial group of Inter tools by removing one or more first Inter tools from the initial group of Inter tools, replacing one or more second Inter tools with one or more complexity-reduced Inter tools, or both.

公开(公告)号：US11356699B2

公开(公告)日：2022-06-07

申请号：US16738288

申请日：2020-01-09

Applicant: MEDIATEK INC.

Inventor： Chia-Ming Tsai ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen

IPC: H04N19/593

Abstract: Method and apparatus for constrained de-blocking filter are disclosed. According to one method, a current block is partitioned into a plurality of sub-blocks using SDIP (Short Distance Intra Prediction mod). A first Bs (boundary strength) for an internal block boundary of the plurality of sub-blocks is determined by setting the first Bs to a second Bs of an Intra-coded boundary block of the current block. De-blocking process is applied, using the first Bs, to reconstructed samples across the internal block boundary of the plurality of sub-blocks to generate filtered-reconstructed samples. In another method, the current block is partitioned into two sub-blocks using SBT (sub-block transform) horizontally or vertically and the first Bs (boundary strength) is determined for an internal block boundary between the two sub-blocks by setting the first Bs to a second Bs of a non-zero cbf (coded block flag) block of the two sub-blocks in step.