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    Method and system for video picture intra-prediction estimation
    2.
    发明授权
    Method and system for video picture intra-prediction estimation 有权

    公开(公告)号：US11381813B2

    公开(公告)日：2022-07-05

    申请号：US16813983

    申请日：2020-03-10

    Applicant: Texas Instruments Incorporated

    Inventor： Ranga Ramanujam Srinivasan ,  Hyung Joon Kim ,  Akira Osamoto

    IPC: H04N19/33 ,  H04N19/176 ,  H04N19/11 ,  H04N19/119 ,  H04N19/147 ,  H04N19/157 ,  H04N19/174 ,  H04N19/593 ,  H04N19/136 ,  H04N19/61

    Abstract: Several systems and methods for intra-prediction estimation of video pictures are disclosed. In an embodiment, the method includes accessing four ‘N×N’ pixel blocks comprising luma-related pixels. The four ‘N×N’ pixel blocks collectively configure a ‘2N×2N’ pixel block. A first pre-determined number of candidate luma intra-prediction modes is accessed for each of the four ‘N×N’ pixel blocks. A presence of one or more luma intra-prediction modes that are common among the candidate luma intra-prediction modes of at least two of the four ‘N×N’ pixel blocks is identified. The method further includes performing, based on the identification, one of (1) selecting a principal luma intra-prediction mode for the ‘2N×2N’ pixel block and (2) limiting a partitioning size to a ‘N×N’ pixel block size for a portion of the video picture corresponding to the ‘2N×2N’ pixel block.

    FAST MOTION ESTIMATION FOR HIERARCHICAL CODING STRUCTURES
    3.
    发明申请
    FAST MOTION ESTIMATION FOR HIERARCHICAL CODING STRUCTURES 有权

    公开(公告)号：US20220116604A1

    公开(公告)日：2022-04-14

    申请号：US17560703

    申请日：2021-12-23

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Hyung Joon Kim ,  Minhua Zhou ,  Akira Osamoto ,  Hideo Tamama

    IPC: H04N19/119 ,  H04N19/107 ,  H04N19/147 ,  H04N19/169 ,  H04N19/52

    Abstract: A method for motion estimation is provided that includes determining a first motion vector for a first child coding unit (CU) of a parent CU and a second motion vector for a second child CU of the parent CU, wherein the first child CU, the second child CU, and the parent CU are in a CU hierarchy, wherein the first and second child CUs are smallest size CUs in the CU hierarchy, and wherein a first motion search type is used to determine the first motion vector and the second motion vector, selecting the first and second motion vectors as candidate predictors for the parent CU, selecting a predictor for a prediction unit (PU) of the first parent CU from the candidate predictors, and refining the predictor using a second motion search type to determine a motion vector for the PU.

    METHOD AND SYSTEM FOR VIDEO PICTURE INTRA-PREDICTION ESTIMATION
    4.
    发明申请
    METHOD AND SYSTEM FOR VIDEO PICTURE INTRA-PREDICTION ESTIMATION 审中-公开

    公开(公告)号：US20190104305A1

    公开(公告)日：2019-04-04

    申请号：US16205319

    申请日：2018-11-30

    Applicant: Texas Instruments Incorporated

    Inventor： Ranga Ramanujam Srinivasan ,  Hyung Joon Kim ,  Akira Osamoto

    IPC: H04N19/11 ,  H04N19/61 ,  H04N19/176 ,  H04N19/136 ,  H04N19/593 ,  H04N19/119 ,  H04N19/174 ,  H04N19/157 ,  H04N19/147 ,  H04N19/33

    Abstract: Several systems and methods for intra-prediction estimation of video pictures are disclosed. In an embodiment, the method includes accessing four ‘N×N’ pixel blocks comprising luma-related pixels. The four ‘N×N’ pixel blocks collectively configure a ‘2N×2N’ pixel block. A first pre-determined number of candidate luma intra-prediction modes is accessed for each of the four ‘N×N’ pixel blocks. A presence of one or more luma intra-prediction modes that are common among the candidate luma intra-prediction modes of at least two of the four ‘N×N’ pixel blocks is identified. The method further includes performing, based on the identification, one of (1) selecting a principal luma intra-prediction mode for the ‘2N×2N’ pixel block and (2) limiting a partitioning size to a ‘N×N’ pixel block size for a portion of the video picture corresponding to the ‘2N×2N’ pixel block.

    LUMA-BASED CHROMA INTRA-PREDICTION FOR VIDEO CODING
    8.
    发明申请
    LUMA-BASED CHROMA INTRA-PREDICTION FOR VIDEO CODING 有权

    公开(公告)号：US20210136360A1

    公开(公告)日：2021-05-06

    申请号：US17146508

    申请日：2021-01-12

    Applicant: Texas Instruments Incorporated

    Inventor： Madhukar Budagavi ,  Akira Osamoto

    IPC: H04N19/105 ,  H04N19/96 ,  H04N19/186 ,  H04N19/167 ,  H04N19/59

    Abstract: A method for luma-based chroma intra-prediction in a video encoder or a video decoder is provided that includes down sampling a first reconstructed luma block of a largest coding unit (LCU), computing parameters α and β of a linear model using immediate top neighboring reconstructed luma samples and left neighboring reconstructed luma samples of the first reconstructed luma block and reconstructed neighboring chroma samples of a chroma block corresponding to the first reconstructed luma block, wherein the linear model is PredC[x,y]=α·RecL′[x,y]+β, wherein x and y are sample coordinates, PredC is predicted chroma samples, and RecL′ is samples of the down sampled first reconstructed luma block, and wherein the immediate top neighboring reconstructed luma samples are the only top neighboring reconstructed luma samples used, and computing samples of a first predicted chroma block from corresponding samples of the down sampled first reconstructed luma block using the linear model and the parameters.

    METHOD AND APPARATUS FOR CODING UNIT PARTITIONING
    9.
    发明申请
    METHOD AND APPARATUS FOR CODING UNIT PARTITIONING 审中-公开

    公开(公告)号：US20190394474A1

    公开(公告)日：2019-12-26

    申请号：US16559788

    申请日：2019-09-04

    Applicant: Texas Instruments Incorporated

    Inventor： Hyung Joon Kim ,  Minhua Zhou ,  Akira Osamoto ,  Hideo Tamama

    IPC: H04N19/192

    Abstract: A method for coding unit partitioning in a video encoder is provided that includes performing intra-prediction on each permitted coding unit (CU) in a CU hierarchy of a largest coding unit (LCU) to determine an intra-prediction coding cost for each permitted CU, storing the intra-prediction coding cost for each intra-predicted CU in memory, and performing inter-prediction, prediction mode selection, and CU partition selection on each permitted CU in the CU hierarchy to determine a CU partitioning for encoding the LCU, wherein the stored intra-prediction coding costs for the CUs are used.

    Method and system for video picture intra-prediction estimation
    10.
    发明授权
    Method and system for video picture intra-prediction estimation 有权

    公开(公告)号：US10178385B2

    公开(公告)日：2019-01-08

    申请号：US15785236

    申请日：2017-10-16

    Applicant: Texas Instruments Incorporated

    Inventor： Ranga Ramanujam Srinivasan ,  Hyung Joon Kim ,  Akira Osamoto

    IPC: H04N19/11 ,  H04N19/176 ,  H04N19/119 ,  H04N19/147 ,  H04N19/157 ,  H04N19/174 ,  H04N19/33 ,  H04N19/593 ,  H04N19/136 ,  H04N19/61

    Abstract: Several systems and methods for intra-prediction estimation of video pictures are disclosed. In an embodiment, the method includes accessing four ‘N×N’ pixel blocks comprising luma-related pixels. The four ‘N×N’ pixel blocks collectively configure a ‘2N×2N’ pixel block. A first pre-determined number of candidate luma intra-prediction modes is accessed for each of the four ‘N×N’ pixel blocks. A presence of one or more luma intra-prediction modes that are common among the candidate luma intra-prediction modes of at least two of the four ‘N×N’ pixel blocks is identified. The method further includes performing, based on the identification, one of (1) selecting a principal luma intra-prediction mode for the ‘2N×2N’ pixel block and (2) limiting a partitioning size to a ‘N×N’ pixel block size for a portion of the video picture corresponding to the ‘2N×2N’ pixel block.

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