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    Concept for determining a measure for a distortion change in a synthesized view due to depth map modifications
    1.
    发明授权
    Concept for determining a measure for a distortion change in a synthesized view due to depth map modifications 有权

    公开(公告)号：US12047547B2

    公开(公告)日：2024-07-23

    申请号：US17824336

    申请日：2022-05-25

    申请人： GE VIDEO COMPRESSION, LLC

    发明人： Gerhard Tech ,  Karsten Mueller ,  Thomas Wiegand

    IPC分类号： H04N13/161 ,  G06T15/20 ,  H04N13/111 ,  H04N13/122 ,  H04N13/128

    CPC分类号： H04N13/161 ,  G06T15/205 ,  H04N13/111 ,  H04N13/122 ,  H04N13/128

    摘要： An apparatus for determining a measure for a distortion change of a first view synthesized from a second view, caused by a modification of a depth map of the second view from a first state to a second state, is configured—starting from a current synthesis state of the first view corresponding to a synthesis from the second view having the depth map modified to the second state in an already processed portion of the depth map and having the depth map unmodified at the first state in a yet to be processed portion of the depth map—to compute a possible successor synthesis state corresponding to a synthesis of the first view from the second view having the depth map modified to the second state in an already processed portion plus a currently processed portion and having the depth map unmodified at the first state in the yet to be processed portion without the currently processed portion; and to determine a distortion change of a distortion of the current synthesis state of the first view relative to an undistorted version of the first view to a distortion of the possible successor synthesis state of the first view relative to the undistorted version of the first view.

    Transform coefficient coding
    3.
    发明授权
    Transform coefficient coding 有权

    公开(公告)号：US11968395B2

    公开(公告)日：2024-04-23

    申请号：US18188744

    申请日：2023-03-23

    申请人： GE Video Compression, LLC

    发明人： Tung Nguyen ,  Heiner Kirchhoffer ,  Detlev Marpe

    IPC分类号： H04N19/60 ,  H03M7/40 ,  H04N19/91

    CPC分类号： H04N19/60 ,  H03M7/4018 ,  H03M7/4075 ,  H04N19/91

    摘要： An idea used herein is to use the same function for the dependency of the context and the dependency of the symbolization parameter on previously coded/decoded transform coefficients. Using the same function—with varying function parameter—may even be used with respect to different transform block sizes and/or frequency portions of the transform blocks in case of the transform coefficients being spatially arranged in transform blocks. A further variant of this idea is to use the same function for the dependency of a symbolization parameter on previously coded/decoded transform coefficients for different sizes of the current transform coefficient's transform block, different information component types of the current transform coefficient's transform block and/or different frequency portions the current transform coefficient is located within the transform block.

    MULTI-VIEW CODING WITH EXPLOITATION OF RENDERABLE PORTIONS
    9.
    发明公开
    MULTI-VIEW CODING WITH EXPLOITATION OF RENDERABLE PORTIONS 审中-公开

    公开(公告)号：US20230328271A1

    公开(公告)日：2023-10-12

    申请号：US18207473

    申请日：2023-06-08

    申请人： GE VIDEO COMPRESSION, LLC

    发明人： Sebastian BOSSE ,  Heiko SCHWARZ ,  Thomas WIEGAND ,  Heribert BRUST

    IPC分类号： H04N19/52 ,  H04N19/597

    CPC分类号： H04N19/52 ,  H04N19/597

    摘要： Rendered portions of a renderable portion of a first view of a multi-view signal are introduced into a prediction loop of a multi-view encoder to form a reference signal for the block-based prediction of the encoder's view predictor may improve the prediction and thereby increasing the coding efficiency. The introduction may be performed by completely inserting the renderable portion into the prediction loop to form new reference pictures with their own reference picture indices in addition to reference pictures obtained by the reconstructed version of the multi-view signal of the block-based prediction. Alternatively, the rendered portion may be introduced into the prediction loop completely, but with replacing the normal prediction reference signal, i.e., the normally reconstructed signal as obtained by block-based prediction. Alternatively, it may be signaled within the data stream which portions of the renderable portion are used to replace respective portions in the normally reconstructed signal.