公开(公告)号：US20200275120A1

公开(公告)日：2020-08-27

申请号：US16794309

申请日：2020-02-19

Applicant: MEDIATEK INC.

Inventor： Yu-Cheng LIN ,  Chun-Chia CHEN ,  Chih-Wei HSU

IPC: H04N19/52 ,  H04N19/176

Abstract: A method and apparatus of Inter prediction for video coding including IBC (Intra Block Copy) are disclosed. In one method, an IBC Merge candidate list is generated from Merge candidates associated with one or more candidate types, wherein one or more target candidates associated with a target candidate type are excluded from the IBC Merge candidate list when one or more constraints are satisfied. Current motion information associated with the current block is encoded or decoded using the IBC Merge candidate list. According to another method, a pruning process for the IBC Merge candidate list is skipped or simplified according to block width, block height, or block area of the current block.

公开(公告)号：US20230328278A1

公开(公告)日：2023-10-12

申请号：US18181858

申请日：2023-03-10

Applicant: MEDIATEK INC.

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

IPC: H04N19/583 ,  H04N19/105 ,  H04N19/176

CPC classification number: H04N19/583 ,  H04N19/176 ,  H04N19/105

Abstract: A method and apparatus for Overlapped Boundary Motion Compensation (OBMC) are provided. According to the method, input data associated with a current block is received, wherein the input data includes pixel data for the current block to be encoded at an encoder side or coded data associated with the current block to be decoded at a decoder side. An inter prediction tool from a set of inter-prediction coding tools is determined for the current block. An OBMC subblock size for the current block is determined based on information related to the inter prediction tool selected for the current block or the inter prediction tool of a neighboring block. Subblock OBMC is applied to a subblock boundary between a neighboring subblock and a current subblock of the current block according to the OBMC subblock size.

公开(公告)号：US20210321089A1

公开(公告)日：2021-10-14

申请号：US17282361

申请日：2019-10-05

Applicant: MEDIATEK INC.

Inventor： Yu-Cheng LIN ,  Chen-Yen LAI ,  Chun-Chia CHEN ,  Yu-Ling HSIAO ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU

IPC: H04N19/105 ,  H04N19/136 ,  H04N19/176

Abstract: A method and apparatus of video coding using history-based candidate derivation are disclosed. According to one method, a current block is inside a Shared Merge candidate list Region (SMR) or a history-based parallel processing region is received. The current block is encoded or decoded using a Merge candidate list. Only if the current block is one of first-coded N (N≥0) blocks, one of last-coded N blocks, or one of selected N blocks, the history-based candidate list is updated after the current block is encoded or decoded. In one embodiment, Merge candidate list is pre-generated for the current block in the SMR and is separately generated for the current block in the history-based parallel processing region. In another method, if the current block is inside the SMR or the history-based parallel processing region, the current block is encoded or decoded using a history-based candidate list associated with the root CU.

公开(公告)号：US20220150507A1

公开(公告)日：2022-05-12

申请号：US17437148

申请日：2020-03-13

Applicant: MEDIATEK INC.

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

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/513 ,  H04N19/159 ,  H04N19/176

Abstract: Exemplary video processing methods and apparatuses for encoding or decoding a current block by inter prediction are disclosed. Input data of a current block is received and partitioned into sub-partitions and motion refinement is independently performed on each sub-partition. A reference block for each sub-partition is obtained from one or more reference pictures according to an initial motion vector (MV). A refined MV for each sub-partition is derived by searching around the initial MV with N-pixel refinement. One or more boundary pixels of the reference block for a sub-partition is padded for motion compensation of the sub-partition. A final predictor for the current block is generated by performing motion compensation for each sub-partition according to its refined MV. The current block is then encoded or decoded according to the final predictor.