公开(公告)号：US20250039356A1

公开(公告)日：2025-01-30

申请号：US18721354

申请日：2022-12-29

Applicant: MEDIATEK INC.

Inventor： Chia-Ming TSAI ,  Chun-Chia CHEN ,  Yu-Ling HSIAO ,  Man-Shu CHIANG ,  Chih-Wei HSU ,  Olena CHUBACH ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/103 ,  H04N19/176 ,  H04N19/186

Abstract: A video coding system that uses multiple models to predict chroma samples is provided. The video coding system receives data for a block of pixels to be encoded or decoded as a current block of a current picture of a video. The video coding system derives multiple prediction linear models based on luma and chroma samples neighboring the current block. The video coding system constructs a composite linear model based on the multiple prediction linear models. The video coding system applies the composite linear model to incoming or reconstructed luma samples of the current block to generate a chroma predictor of the current block. The video coding system uses the chroma predictor to reconstruct chroma samples of the current block or to encode the current block.

公开(公告)号：US20220360789A1

公开(公告)日：2022-11-10

申请号：US17768622

申请日：2020-11-25

Applicant: MEDIATEK INC.

Inventor： Yu-Ling HSIAO ,  Chun-Chia CHEN ,  Chih-Wei HSU

IPC: H04N19/137 ,  H04N19/59 ,  H04N19/176

Abstract: A method and apparatus for video coding are disclosed. According to this method, a current block is received at an encoder side or compressed data comprising the current block is received at a decoder side, where the current block is partitioned into two geometric prediction units. Motion information for the two geometric prediction units is determined. Weighting information for the two geometric prediction units is determined. A motion storage type variable based on the weighting information is determined, where the motion information associated with the current block is stored according to a value of the motion storage type variable. A geometric predictor for the current block is generated by blending two geometric predictors according to the weighting information, where the two geometric predictors are derived for the two geometric prediction units using the motion information associated with the current block.

公开(公告)号：US20220124319A1

公开(公告)日：2022-04-21

申请号：US17567313

申请日：2022-01-03

Applicant: MEDIATEK INC.

Inventor： Chen-Yen LAI ,  Yu-Ling HSIAO ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: Video processing methods comprise receiving input data of a current block in a current picture having a plurality of Virtual Pipeline Data Units (VPDUs), wherein each VDPU is a fixed size, performing a decoding process to decode Coding Units (CUs) in the current VPDU and generate decoded samples of the current VPDU, wherein each CU coded in a Current Picture Referencing (CPR) mode is decoded by fetching decoded samples in a reference block stored in a CPR referring buffer, and updating the CPR referring buffer by storing the decoded samples of the current VPDU when finishing the decoding process of the current VPDU, wherein the CPR referring buffer is updated one VPDU by one VPDU.

公开(公告)号：US20210400311A1

公开(公告)日：2021-12-23

申请号：US16903453

申请日：2020-06-17

Applicant: MEDIATEK INC.

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

IPC: H04N19/90 ,  H04N19/80 ,  H04N19/176

Abstract: Methods and apparatus of video processing for a video coding system using Neural Network (NN) are disclosed. According to this method, a shifted region is determined for the filter region to avoid unavailable reconstructed or filtered-reconstructed video data for the NN processing of the filter region, where boundaries of the shifted region comprises region boundaries derived by shifting target boundaries upward, leftward, or both upward and leftward, and wherein the target boundaries correspond to one or more top boundaries and one or more left boundaries of target processing region including the current block and one or more remaining un-processed blocks. According to another method, the areas outside boundaries of pictures, slices, tiles, or tile groups are padded. In yet another method, a flag is used to indicate whether the NN processing is allowed to cross a boundary between two slices, two tiles or two tile groups.

公开(公告)号：US20210360284A1

公开(公告)日：2021-11-18

申请号：US17293674

申请日：2019-11-15

Applicant: MEDIATEK INC.

Inventor： Chen-Yen LAI ,  Yu-Ling HSIAO ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN

IPC: H04N19/56 ,  H04N19/176 ,  H04N19/172

Abstract: A prediction method and apparatus for video coding include a set of Merge candidates having an MMVD (Merge mode with motion vector differences (MVD)) candidate are generated. When the current block has a block size belonging to at least one default block size, whether a target candidate in the set of Merge candidates is bi-prediction is determined after the set of Merge candidates is generated. If the target candidate is bi-prediction: the target candidate is replaced by a uni-prediction candidate; the uni-prediction candidate is included in the set of Merge candidates to generate a modified set of Merge candidates; and current motion information associated with the current block is encoded using the modified set of Merge candidates at the video encoder side or the current motion information associated with the current block is decoded at the video decoder side using the modified set of Merge candidates.

公开(公告)号：US20210360274A1

公开(公告)日：2021-11-18

申请号：US17296759

申请日：2019-11-28

Applicant: MEDIATEK INC.

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

IPC: H04N19/51 ,  H04N19/119 ,  H04N19/176 ,  H04N19/105

Abstract: Video processing methods and apparatuses for coding a current block comprise receiving input data of a current block, splitting the current block into sub-blocks, deriving motion information for the sub-blocks, performing motion compensation for the sub-blocks using the motion information to derive a final predictor, deriving and storing a representative motion vector for each grid in the current block, and encoding or decoding the current block using the final predictor. The representative motion vector for grids in a weighted area is determined by combining the motion vectors of the sub-blocks if the motion vectors of the sub-blocks are in different lists. The representative motion vector for grids in the weighted area is determined as one of the motion vectors of the sub-blocks if the motion vectors of the sub-blocks are in the same list.

公开(公告)号：US20210250580A1

公开(公告)日：2021-08-12

申请号：US17257929

申请日：2019-08-02

Applicant: MEDIATEK INC.

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

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/137 ,  H04N19/70 ,  H04N19/176

Abstract: A method and apparatus Inter prediction for video coding including IBC (Intra Block Copy) coding tool are disclosed. According to one method, a current permitted band inside the current picture for the current block is identified. A target IBC candidate is selected, where a target block vector of the target IBC candidate points from the current block to a target reference block in the current picture. An adjusted candidate list is generated by taking into account of the target IBC candidate and the current permitted band. The current motion information associated with the current block is encoded using the adjusted candidate list at the video encoder side or decoded using the adjusted candidate list at the video decoder side using the adjusted candidate list. In another method, a syntax for a target MVD (Motion Vector Difference) is decoded without sign information or with reduced sign information of the target MVD.