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    PICTURE CODING SUPPORTING BLOCK MERGING AND SKIP MODE
    184.
    发明申请
    PICTURE CODING SUPPORTING BLOCK MERGING AND SKIP MODE 有权

    公开(公告)号：US20210006821A1

    公开(公告)日：2021-01-07

    申请号：US17027168

    申请日：2020-09-21

    Applicant: GE Video Compression LLC

    Inventor： Heiko SCHWARZ ,  Heiner KIRCHHOFFER ,  Philipp HELLE ,  Simon OUDIN ,  Jan STEGEMANN ,  Benjamin BROSS ,  Detlev MARPE ,  Thomas WIEGAND

    IPC: H04N19/52 ,  H04N19/50 ,  H04N19/70 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184

    Abstract: A coding efficiency increase is achieved by using a common signalization within the bitstream with regard to activation of merging and activation of the skip mode. One possible state of one or more syntax elements within the bitstream may signalize for a current sample set of a picture that the sample set is to be merged and has no prediction residual encoded and inserted into the bitstream. A common flag may signalize whether the coding parameters associated with a current sample set are to be set according to a merge candidate or to be retrieved from the bitstream, and whether the current sample set of the picture is to be reconstructed based on a prediction signal depending on the coding parameters associated with the current sample set, without any residual data, or to be reconstructed by refining the prediction signal depending on the coding parameters associated with the current sample set by means of residual data within the bitstream.

    EFFICIENT MULTI-VIEW CODING USING DEPTH-MAP ESTIMATE FOR A DEPENDENT VIEW
    186.
    发明申请
    EFFICIENT MULTI-VIEW CODING USING DEPTH-MAP ESTIMATE FOR A DEPENDENT VIEW 审中-公开

    公开(公告)号：US20200275072A1

    公开(公告)日：2020-08-27

    申请号：US16871919

    申请日：2020-05-11

    Applicant: GE Video Compression, LLC

    Inventor： Heiko SCHWARZ ,  Thomas WIEGAND

    IPC: H04N13/128 ,  H04N13/161 ,  H04N19/194 ,  H04N19/513 ,  H04N19/597 ,  H04N19/46 ,  H04N19/52 ,  H04N19/895

    Abstract: The usual coding order according to which the reference view is coded prior to the dependent view, and within each view, a depth map is coded subsequent to the respective picture, may be maintained and does lead to a sacrifice of efficiency in performing inter-view redundancy removal by, for example, predicting motion data of the current picture of the dependent view from motion data of the current picture of the reference view. Rather, a depth map estimate of the current picture of the dependent view is obtained by warping the depth map of the current picture of the reference view into the dependent view, thereby enabling various methods of inter-view redundancy reduction more efficiently by bridging the gap between the views. According to another aspect, the following discovery is exploited: the overhead associated with an enlarged list of motion predictor candidates for a block of a picture of a dependent view is comparatively low compared to a gain in motion vector prediction quality resulting from an adding of a motion vector candidate which is determined from an, in disparity-compensated sense, co-located block of a reference view.

    CONCEPT FOR DETERMINING A MEASURE FOR A DISTORTION CHANGE IN A SYNTHESIZED VIEW DUE TO DEPTH MAP MODIFICATIONS
    187.
    发明申请
    CONCEPT FOR DETERMINING A MEASURE FOR A DISTORTION CHANGE IN A SYNTHESIZED VIEW DUE TO DEPTH MAP MODIFICATIONS 审中-公开

    公开(公告)号：US20200267368A1

    公开(公告)日：2020-08-20

    申请号：US16868654

    申请日：2020-05-07

    Applicant: GE VIDEO COMPRESSION LLC

    Inventor： Gerhard TECH ,  Karsten MUELLER ,  Thomas WIEGAND

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

    Abstract: 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.

    MULTI-VIEW CODING WITH EFFICIENT RESIDUAL HANDLING
    189.
    发明申请
    MULTI-VIEW CODING WITH EFFICIENT RESIDUAL HANDLING 审中-公开

    公开(公告)号：US20200244941A1

    公开(公告)日：2020-07-30

    申请号：US16848297

    申请日：2020-04-14

    Applicant: GE VIDEO COMPRESSION, LLC

    Inventor： Heiko SCHWARZ ,  Thomas WIEGAND ,  Martin WINKEN

    IPC: H04N13/128 ,  H04N19/597 ,  H04N19/463 ,  H04N13/161

    Abstract: A gain in multi-view coding is achieved as follows: the residual signal involved with coding a dependent view of the multi-view signal is predicted from a reference residual signal of the current picture of the reference view using block-granular disparity-compensated prediction, i.e. using disparity compensated prediction with a disparity defined at, and varying with, block granularity so that each block of the current picture of the dependent view has its own disparity displacement such as its own disparity vector, associated therewith. In other words, a remaining similarity between the residual signal involved with predictively coding the reference view is used in order to predict the residual signal involved with predictively coding the dependent view.

    ENTROPY ENCODING AND DECODING SCHEME
    190.
    发明申请
    ENTROPY ENCODING AND DECODING SCHEME 审中-公开

    公开(公告)号：US20200228135A1

    公开(公告)日：2020-07-16

    申请号：US16836191

    申请日：2020-03-31

    Applicant: GE VIDEO COMPRESSION, LLC

    Inventor： Detlev MARPE ,  Tung NGUYEN ,  Heiko SCHWARZ ,  Thomas WIEGAND

    IPC: H03M7/00 ,  H03M7/46 ,  H03M7/40

    Abstract: Decomposing a value range of the respective syntax elements into a sequence of n partitions with coding the components of z laying within the respective partitions separately with at least one by VLC coding and with at least one by PIPE or entropy coding is used to greatly increase the compression efficiency at a moderate coding overhead since the coding scheme used may be better adapted to the syntax element statistics. Accordingly, syntax elements are decomposed into a respective number n of source symbols si with i=1 . . . n, the respective number n of source symbols depending on as to which of a sequence of n partitions into which a value range of the respective syntax elements is sub-divided, a value z of the respective syntax elements falls into, so that a sum of values of the respective number of source symbols si yields z, and, if n>1, for all i=1 . . . n−1, the value of si corresponds to a range of the ith partition.

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