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    Methods of Constrained Intra Block Copy for Reducing Worst Case Bandwidth in Video Coding
    62.
    发明申请
    Methods of Constrained Intra Block Copy for Reducing Worst Case Bandwidth in Video Coding 审中-公开

    公开(公告)号：US20180131963A1

    公开(公告)日：2018-05-10

    申请号：US15564205

    申请日：2016-04-13

    Applicant: MEDIATEK INC.

    Inventor： Tzu-Der CHUANG ,  Shan LIU ,  Xiaozhong XU

    IPC: H04N19/593 ,  H04N19/105 ,  H04N19/176 ,  H04N19/11 ,  H04N19/70

    CPC classification number: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/51 ,  H04N19/70

    Abstract: A method and apparatus of video coding using IntraBC (Intra Block Copy) for video data are disclosed. Restricted prediction is determined, in which one or more selected PU (prediction unit) sizes, PU prediction types or both are disabled or disallowed. Video coding is applied to the current block using coding modes including IntraBC prediction in accordance with the restricted prediction. The selected PU sizes, PU prediction types or both may correspond to 8×8 bi-prediction PU. In one example, the selected PU sizes, PU prediction types or both are disabled or disallowed for the restricted prediction except one or more conditions are determined to be satisfied. The conditions may correspond to at least one of two motion vectors of the 8×8 bi-prediction PU having integer values, the conditions may also correspond to at least one of motion vector components of the 8×8 bi-prediction PU having integer valueIntraBCIntraBCIntraBCIntraBCIntraBC.

    METHOD FOR COLOR INDEX CODING USING A GENERALIZED COPY PREVIOUS MODE
    63.
    发明申请
    METHOD FOR COLOR INDEX CODING USING A GENERALIZED COPY PREVIOUS MODE 审中-公开

    公开(公告)号：US20170289572A1

    公开(公告)日：2017-10-05

    申请号：US15505972

    申请日：2015-09-02

    Applicant: MEDIATEK INC.

    Inventor： Jing YE ,  Shan LIU ,  Jungsun KIM ,  Wang-Lin LAI ,  Tzu-Der CHUANG ,  Yu-Chen SUN ,  Xiaozhong XU

    IPC: H04N19/593 ,  H04N19/184 ,  G06F17/27 ,  H04N19/70

    CPC classification number: H04N19/593 ,  G06F17/271 ,  H04N19/184 ,  H04N19/70

    Abstract: A method for color index coding of blocks in a picture is disclosed. In one embodiment for the decoder side, a current coding mode is parsed from the input coded bitstream for one or more first currently decoded pixels in a current block starting from a first starting position. If the current coding mode corresponds to a generalized copy-previous-row mode, one or more first reference pixels starting from a first starting reference position located at T-th row above the first currently decoded pixels are identified, where T is an integer equal to or greater than one. The first reference pixels starting from the first starting reference position are then used to decode the first currently decoded pixels starting from a first starting position by copying the first reference pixels starting from the first starting reference position respectively. The system may also include a copy-left mode or escape mode.

    IN-LOOP NEURAL NETWORKS FOR VIDEO CODING
    65.
    发明申请
    IN-LOOP NEURAL NETWORKS FOR VIDEO CODING 有权

    公开(公告)号：US20250124607A1

    公开(公告)日：2025-04-17

    申请号：US18727505

    申请日：2023-01-12

    Applicant: MEDIATEK INC.

    Inventor： Jan KLOPP ,  Ching-Yeh CHEN ,  Tzu-Der CHUANG ,  Yu-Wen HUANG

    IPC: G06T9/00 ,  H04N19/117 ,  H04N19/184

    Abstract: A method for video decoding includes receiving a video frame reconstructed based on data received from a bitstream. The method further includes extracting, from the bitstream, a first syntax element indicating whether a spatial partition for partitioning the video frame is active. The method also includes, responsive to the first syntax element indicating that the spatial partition for partitioning the video frame is active, determining a configuration of the spatial partition for partitioning the video frame, determining a plurality of parameter sets of a neural network, and applying the neural network to the video frame. The video frame is spatially divided based on the determined configuration of the spatial partition for partitioning the video frame into a plurality of portions, and the neural network is applied to the plurality of portions in accordance with the determined plurality of parameter sets.

    Method and Apparatus Deriving Merge Candidate from Affine Coded Blocks for Video Coding
    66.
    发明申请
    Method and Apparatus Deriving Merge Candidate from Affine Coded Blocks for Video Coding 有权

    公开(公告)号：US20250097404A1

    公开(公告)日：2025-03-20

    申请号：US18727516

    申请日：2023-01-06

    Applicant: MEDIATEK INC.

    Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN

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

    Abstract: Methods and apparatus of video coding are disclosed. According to this method, input data comprising pixel data for a current block to be encoded at an encoder side or encoded data of the current block to be decoded at a decoder side is received. When one or more reference blocks or sub-blocks of the current block are coded in an affine mode, the following coding process is applied: one or more derived MVs (Motion Vectors) are determined for the current block according to one or more affine models associated with said one or more reference blocks or sub-blocks; a merge list comprising at least one of said one or more derived MVs as one translational MV candidate is generated; and predictive encoding or decoding is applied to the input data using information comprising the merge list.

    Method and Apparatus of Cross-Component Linear Model Prediction in Video Coding System
    67.
    发明申请
    Method and Apparatus of Cross-Component Linear Model Prediction in Video Coding System 有权

    公开(公告)号：US20250071331A1

    公开(公告)日：2025-02-27

    申请号：US18728999

    申请日：2023-01-18

    Applicant: MEDIATEK INC.

    Inventor： Chia-Ming TSAI ,  Chun-Chia CHEN ,  Chih-Wei HSU ,  Ching-Yeh CHEN ,  Tzu-Der CHUANG

    IPC: H04N19/70 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/33

    Abstract: A method and apparatus for video coding are disclosed. According to the method for the decoder side, a first syntax, related to whether the current block is coded in a CCLM related mode, is parsed from a bitstream comprising the encoded data for the current block. If the first syntax indicates the current block being coded in the CCLM related mode, a second syntax is parsed from the bitstream, wherein the second syntax is related to whether a multiple model CCLM mode is used or whether one or more model parameters are explicitly signalled or implicitly derived. The model parameters for the second-colour block are determined if the first syntax indicates the current block being coded in a CCLM related mode. The encoded data associated with the second-colour block is then decoded using prediction data comprising the cross-colour predictor for the second-colour block.

    CROSS-COMPONENT LINEAR MODEL PREDICTION
    68.
    发明申请
    CROSS-COMPONENT LINEAR MODEL PREDICTION 有权

    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.

    Method and Apparatus for Hardware-Friendly Template Matching in Video Coding System
    69.
    发明公开
    Method and Apparatus for Hardware-Friendly Template Matching in Video Coding System 审中-公开

    公开(公告)号：US20240357081A1

    公开(公告)日：2024-10-24

    申请号：US18684783

    申请日：2022-08-18

    Applicant: MEDIATEK INC.

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

    IPC: H04N19/105 ,  H04N19/167 ,  H04N19/176 ,  H04N19/513

    CPC classification number: H04N19/105 ,  H04N19/167 ,  H04N19/176 ,  H04N19/521

    Abstract: A method and apparatus for video coding system that utilizes low-latency template-matching motion-vector refinement are disclosed. According to this method, input data associated with a current block of a video unit in a current picture are received. Motion compensation is then applied to the current block according to an initial motion vector (MV) to obtain initial motion-compensated predictors of the current. After applying the motion compensation to the current block, template-matching MV refinement is applied to the current block to obtain a refined MV for the current block. The current block is then encoded or decoded using information including the refined MV. The method may further comprise determining gradient values of the initial motion-compensated predictors. The initial motion-compensated predictors can be adjusted by taking into consideration of the gradient values and/or MV difference between the refined and initial MVs.

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