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    Methods and systems for generating color remapping information supplemental enhancement information messages for video
    192.
    发明授权
    Methods and systems for generating color remapping information supplemental enhancement information messages for video 有权

    公开(公告)号：US10397443B2

    公开(公告)日：2019-08-27

    申请号：US15436313

    申请日：2017-02-17

    Applicant: QUALCOMM Incorporated

    Inventor： Adarsh Krishnan Ramasubramonian ,  Joel Sole Rojals ,  Dmytro Rusanovskyy ,  Done Bugdayci Sansli ,  Marta Karczewicz

    IPC: H04N1/60 ,  G06T7/90 ,  H04N19/70 ,  H04N19/186

    Abstract: Systems, methods, and computer readable media are described for providing improved color remapping. In some examples, a video bitstream is obtained that includes a plurality of pictures having a first color characteristic. A color remapping information (CRI) supplemental enhancement information (SEI) message is identified from the video bitstream. A restriction is placed on the CRI SEI message such that a value of a syntax element of the CRI SEI message is restricted based on a condition. One or more samples of the plurality of pictures is remapped from the first color characteristic to a second color characteristic using a color remapping model of the CRI SEI message according to the restriction. In some cases, the condition is a chroma format of the plurality of pictures, in which case the value of the syntax element of the CRI SEI message is restricted based on the chroma format. In some cases, the condition is a color remap value identifying a purpose of the color remapping model of the CRI SEI message, in which case the value of the syntax element of the CRI SEI message is restricted based on the color remap value.

    INTRA PREDICTION FOR 360-DEGREE VIDEO
    193.
    发明申请
    INTRA PREDICTION FOR 360-DEGREE VIDEO 审中-公开

    公开(公告)号：US20190253732A1

    公开(公告)日：2019-08-15

    申请号：US16271065

    申请日：2019-02-08

    Applicant: QUALCOMM Incorporated

    Inventor： Fnu Hendry ,  Geert Van der Auwera ,  Muhammed Zeyd Coban ,  Marta Karczewicz

    IPC: H04N19/597 ,  H04N19/593 ,  H04N19/176 ,  H04N19/105 ,  H04N5/232

    Abstract: A video coder may determine reference samples based on a location of a current block of a current picture of the 360-degree video data and a packing arrangement that defines an arrangement of a plurality of regions in the current picture. The current picture is in a projected domain and each respective region of the plurality of regions is a respective face defined by a projection of 360-degree video data. The regions are arranged in the current picture according to the packing arrangement. Based on the location of the current block being at a border of the first region that is adjacent to the second region and there being a discontinuity at the border due to the packing arrangement, the reference samples are samples of the current picture that spatially neighbor the current block in a spherical domain and not in the projected domain.

    LOOP FILTER PADDING FOR 360-DEGREE VIDEO CODING
    194.
    发明申请
    LOOP FILTER PADDING FOR 360-DEGREE VIDEO CODING 审中-公开

    公开(公告)号：US20190253622A1

    公开(公告)日：2019-08-15

    申请号：US16270275

    申请日：2019-02-07

    Applicant: QUALCOMM Incorporated

    Inventor： Geert Van der Auwera ,  Muhammed Zeyd Coban ,  Fnu Hendry ,  Marta Karczewicz

    IPC: H04N5/232 ,  H04N19/597 ,  H04N19/82

    CPC classification number: H04N5/23238 ,  H04N19/597 ,  H04N19/82

    Abstract: An example method includes, receiving an encoded picture of 360-degree video data, the encoded picture of 360-degree video data being arranged in packed faces obtained from a projection of a sphere of the 360-degree video data; decoding the picture of encoded 360-degree video data to obtain a reconstructed picture of 360-degree video data, the reconstructed picture of 360-degree video data being arranged in the packed faces; padding the reconstructed picture of 360-degree video data to generate a padded reconstructed picture of 360-degree video data; in-loop filtering the padded reconstructed picture of 360-degree video data to generate a padded and filtered reconstructed picture of 360-degree video data; and storing the padded and filtered reconstructed picture of 360-degree video data in a reference picture memory for use in predicting subsequent pictures of 360-degree video data.

    Bi-directional optical flow for video coding
    197.
    发明授权
    Bi-directional optical flow for video coding 有权

    公开(公告)号：US10375413B2

    公开(公告)日：2019-08-06

    申请号：US15277433

    申请日：2016-09-27

    Applicant: QUALCOMM Incorporated

    Inventor： Xiang Li ,  Jianle Chen ,  Wei-Jung Chien ,  Marta Karczewicz

    IPC: H04N19/52 ,  H04N19/573 ,  H04N19/577 ,  H04N19/139 ,  H04N19/132 ,  H04N19/136 ,  H04N19/182

    Abstract: An example device for decoding video data includes a processor configured to decode first and second reference pictures, wherein the first reference picture and the second reference picture are either both to be displayed before or after the current picture, determine a first motion vector (MV0) from a current block of the current picture to a first reference block of the first reference picture, determine a second motion vector (MV1) from the current block to a second reference block of the second reference picture, determine a first temporal distance (TD0) from the current picture to the first reference picture, determine a second temporal distance (TD1) from the current picture to the second reference picture, and decode the current block according to bi-directional optical flow (BIO) using MV0, MV1, TD0, and TD1.

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