公开(公告)号：US20220086439A1

公开(公告)日：2022-03-17

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 ,  H04N19/96 ,  H04N19/186 ,  H04N19/176

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：US20210385467A1

公开(公告)日：2021-12-09

申请号：US17265967

申请日：2019-08-16

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU

IPC: H04N19/196 ,  H04N19/96 ,  H04N19/124 ,  H04N19/70 ,  H04N19/176 ,  H04N19/167

Abstract: Video data processing methods and apparatuses comprise receiving input data associated with a current chroma block, determine a luma Quantization Parameter (QP) of a collocated luma block, reuse the luma QP of the collocated luma block to derive a chroma QP for the current chroma block, and encode or decode one or more Transform Units (TUs) associated with the current chroma block using the chroma QP. The collocated luma block is a block that covers a collocated sample of one predefined sample of the current chroma block, and an example of the predefined sample is a center sample of the current chroma block. The input video data is partitioned according to two separate Coding Unit (CU) partitioning structures for luma and chroma components when dual tree coding is enabled.

公开(公告)号：US20210329233A1

公开(公告)日：2021-10-21

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 ,  H04N19/436 ,  H04N19/70 ,  H04N19/96 ,  H04N19/186

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：US20210314602A1

公开(公告)日：2021-10-07

申请号：US17267124

申请日：2019-09-17

Applicant: MEDIATEK INC.

Inventor： Man-Shu CHIANG ,  Chih-Wei HSU

IPC: H04N19/56 ,  H04N19/517 ,  H04N19/176

Abstract: Video processing methods and apparatuses for coding a current block generate a final predictor by combining multiple predictors of the current block. One of the predictors for the current block is a motion compensated predictor, which is generated according to one candidate selected from a first candidate list. The construction of the first candidate list includes deriving an average candidate by averaging motion information of existing candidates in the first candidate list. A second predictor for the current block is another motion compensated predictor or an intra predictor.

公开(公告)号：US20210185332A1

公开(公告)日：2021-06-17

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 ,  H04N19/184 ,  H04N19/172 ,  H04N19/132

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：US20210168405A1

公开(公告)日：2021-06-03

申请号：US17047244

申请日：2019-04-16

Applicant: MEDIATEK INC.

Inventor： Yu-Ling HSIAO ,  Yu-Chi SU ,  Jan KLOPP ,  Ching-Yeh CHEN ,  Tzu-Der CHUANG ,  Chih-Wei HSU ,  Yu-Wen HUANG

IPC: H04N19/70 ,  H04N19/82 ,  G06N3/04

Abstract: A method and apparatus of video encoding video coding for a video encoder or decoder using Neural Network (NN) are disclosed. According to this method, the multiple frames in a video sequence comprises multiple segments, where each of the multiple segments comprises a set of frames. The NN (Neural Network) processing is applied to a target signal in one or more encoded frames of a target segment in the encoder side or to the target signal in one or more decoded frames of the target segment in the decoder side using one NN parameter set for the target segment. The target signal may correspond to reconstructed residual, reconstructed output, de-blocked output, SAO (sample adaptive offset) output, ALF (adaptive loop filter) output, or a combination thereof. In another embodiment, the NN processing is applied to a target signal only in one or more specific encoded or decoded frames.

公开(公告)号：US20210136400A1

公开(公告)日：2021-05-06

申请号：US16464338

申请日：2017-11-16

Applicant: MEDIATEK INC.

Inventor： Chun-Chia CHEN ,  Chih-Wei HSU ,  Yu-Wen HUANG

IPC: H04N19/513

Abstract: A method and apparatus of video coding using Merge mode or Skip mode in a video coding system are disclosed. According to this method, a Merge or Skip candidate list is generated from multiple-type candidates comprising one or more sub-block TMVP-type (temporal motion vector prediction-type) candidates. The step of generating a Merge or Skip candidate list comprises a pruning process dependent on whether a current sub-block TMVP-type candidate being inserted, a previous sub-block TMVP-type candidate in the Merge or Skip candidate list, or both are “single block”. According to another method, a Merge or Skip candidate list is generated from multiple-type candidates including sub-block TMVP-type (temporal motion vector prediction-type) candidates, where the sub-block TMVP-type candidates comprise two or more first sub-block temporal MV predictors.

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：US20200068218A1

公开(公告)日：2020-02-27

申请号：US16611611

申请日：2018-05-08

Applicant: MEDIATEK INC.

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

IPC: H04N19/56 ,  H04N19/52 ,  H04N19/82 ,  H04N19/176 ,  H04N19/139 ,  H04N19/105

Abstract: Method and apparatus of Inter prediction for video coding performed by a video encoder or a video decoder that utilizes motion vector prediction (MVP) to code a motion vector (MV) associated with a block coded with Inter mode are disclosed. According to one method, an initial MVP candidate list is generated for the current block. When candidate reordering is selected for the current block, target candidates within a selected candidate set are reordered to generate a reordered MVP candidate list and then the current block is encoded at the video encoder side or decoded at the video decoder sider using the reordered MVP candidate list, where the selected candidate set comprises at least partial candidates of the initial MVP candidate list.

公开(公告)号：US20200053380A1

公开(公告)日：2020-02-13

申请号：US16654914

申请日：2019-10-16

Applicant: MEDIATEK INC.

Inventor： Chun-Chia CHEN ,  Chih-Wei HSU ,  Yu-Wen HUANG

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/96 ,  H04N19/139 ,  H04N19/176 ,  H04N19/107

Abstract: Aspects of the disclosure provide a method for video coding in merge mode or skip mode. The method can include receiving a prediction block (PB) of a picture, determining number and positions of merge candidates of the PB according to a size and/or a shape of the PB, and constructing a candidate list including motion data of a subset of the merge candidate positions.