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    Color remapping for non-4:4:4 format video content
    5.
    发明授权
    Color remapping for non-4:4:4 format video content 有权

    公开(公告)号：US10574959B2

    公开(公告)日：2020-02-25

    申请号：US16027185

    申请日：2018-07-03

    申请人： QUALCOMM Incorporated

    发明人： Adarsh Krishnan Ramasubramonian ,  Joel Sole Rojals ,  Dmytro Rusanovskyy

    IPC分类号： H04N9/67 ,  H04N9/77 ,  H04N19/132 ,  H04N19/122 ,  H04N19/186 ,  H04N19/182 ,  H04N19/70

    摘要： A video decoder is configured to reconstruct a first version of a current picture; determine a transformed sample of the first component, a transformed sample of the second component, and a transformed sample of the third component by applying a first matrix to a triplet comprising the samples of the first, second, and third components; include the transformed samples of the first, second, and third components in a second version of the current picture; determine, based on the transformed samples of the first, second, and third components and a first row of a second matrix, a set of transformed samples for the third component, the set of transformed samples for the third component including samples of the third component that are immediately neighboring the transformed sample of the third component; and include the set of transformed samples for the third component in the second version of the current picture.

    Methods and systems for generating color remapping information supplemental enhancement information messages for video
    9.
    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

    申请人： QUALCOMM Incorporated

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

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

    摘要： 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.