公开(公告)号：US11153607B2

公开(公告)日：2021-10-19

申请号：US16216650

申请日：2018-12-11

Applicant: MEDIATEK INC.

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

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/86 ,  H04N19/117 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/80

Abstract: A deblocking filtering method includes receiving reconstructed video data associated with a block boundary in a video coding system. The block boundary has N lines of samples crossing the block boundary from a P side to a Q side of the boundary. The method further includes determining whether to apply a first filter set to reduce block artifacts at the block boundary based on whether a first inter-side difference of a first line of the N lines of samples is greater than an inter-side difference threshold, determining a filter length of a filter in the first filter set based on a first side length of the P side, and a second side length of the Q side when it is determined to apply the first filter set, and applying at least one filter in the first filter set with the determined filter length on the block boundary.

公开(公告)号：US20200275115A1

公开(公告)日：2020-08-27

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: H04N19/46 ,  H04N19/107 ,  H04N19/159 ,  H04N19/176

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：US11985314B2

公开(公告)日：2024-05-14

申请号：US17420837

申请日：2019-12-24

Applicant: MEDIATEK INC.

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

IPC: H04N19/119 ,  H04N19/169 ,  H04N19/176 ,  H04N19/96

CPC classification number: H04N19/119 ,  H04N19/176 ,  H04N19/1883 ,  H04N19/96

Abstract: Video processing methods and apparatuses in a video encoding or decoding system for processing out-of-bounds nodes in a current picture. An out-of-bounds node is a coding tree node with a block region across a current picture boundary. The video processing method or apparatus determines an inferred splitting type, applies the inferred splitting type to split the out-of-bounds node into child blocks, adaptively splits each child block into one or multiple leaf blocks, and encodes or decodes the leaf blocks in the out-of-bounds node inside the current picture. The inferred splitting type for partitioning out-of-bounds nodes in an inter slice, picture, or tile is the same as the inferred splitting type for partitioning out-of-bounds nodes in an intra slice, picture, or tile.

公开(公告)号：US11930174B2

公开(公告)日：2024-03-12

申请号：US17418311

申请日：2019-12-30

Applicant: MEDIATEK INC.

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

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

CPC classification number: H04N19/119 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: A method and apparatus for block partition are disclosed. If a cross-colour component prediction mode is allowed, the luma block and the chroma block are partitioned into one or more luma leaf blocks and chroma leaf blocks. If a cross-colour component prediction mode is allowed, whether to enable an LM (Linear Model) mode for a target chroma leaf block is determined based on a first split type applied to an ancestor chroma node of the target chroma leaf block and a second split type applied to a corresponding ancestor luma node. According to another method, after the luma block and the chroma block are partitioned using different partition tress, determine whether one or more exception conditions to allow an LM for a target chroma leaf block are satisfied when the chroma partition tree uses a different split type, a different partition direction, or both from the luma partition tree.

公开(公告)号：US11902510B2

公开(公告)日：2024-02-13

申请号：US17614712

申请日：2020-05-28

Applicant: MEDIATEK INC.

Inventor： Chia-Ming Tsai ,  Chih-Wei Hsu

IPC: H04N19/105 ,  H04N19/186 ,  H04N19/80 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/80

Abstract: Video processing methods and apparatuses for coding a current block and a adjacent block comprise receiving input data of the current and adjacent blocks in a current picture, determines the current and adjacent blocks are both coded in a BDPCM or RDPCM mode, performing a deblocking filtering operation on an edge between the current and adjacent blocks by de-activating deblocking filtering for a first color component and activating deblocking filtering for a second color component, and encoding or decoding the current and adjacent blocks. Each current pixel in a BDPCM coded block is predicted by one or more neighboring pixels of the current pixel. RDPCM is applied to process quantized residues of a RDPCM coded block according to a prediction direction of the RDPCM coded block.

公开(公告)号：US11800102B2

公开(公告)日：2023-10-24

申请号：US17552963

申请日：2021-12-16

Applicant: MEDIATEK INC.

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

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/169 ,  H04N19/159

CPC classification number: H04N19/119 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/1883

Abstract: Low-latency video coding methods and apparatuses include receiving input data associated with a current Intra slice composed of Coding Tree Units (CTU), where each CTU includes luma and chroma Coding Tree Blocks (CTBs), partitioning each CTB into non-overlapping pipeline units, and encoding or decoding the CTUs in the current Intra slices by performing processing of chroma pipeline units after beginning processing of luma pipeline units in at least one pipeline stage. Each of the pipeline units is processed by one pipeline stage after another pipeline stage, and different pipeline stages process different pipeline units simultaneously. The pipeline stage in the low-latency video coding methods and apparatuses simultaneously processes one luma pipeline unit and at least one previous chroma pipeline unit within one pipeline unit time interval.

公开(公告)号：US11330277B2

公开(公告)日：2022-05-10

申请号：US17270610

申请日：2019-08-30

Applicant: MEDIATEK INC.

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

IPC: H04N19/00 ,  H04N19/176 ,  H04N19/117 ,  H04N19/132 ,  H04N19/159 ,  H04N19/184 ,  H04N19/513

Abstract: Method and apparatus for constrained de-blocking filter are disclosed. According to one method, if a CU is partitioned into multiple sub-CUs, the de-blocking process is also applied to the sub-block boundaries inside the current filtered-reconstructed block. According to another method, if first reference samples used for the de-blocking process of a first boundary are to be modified by the de-blocking process of a second boundary, the first reference samples are replaced by padding samples that are not to be modified by the de-blocking process of the second boundary. According to yet another method, the de-blocking process is applied to a reconstructed block corresponding to a current block to result in a current filtered-reconstructed block regardless whether a boundary of the current block corresponds to an 8×8 sample grid boundaries.