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    CODING OF INTRA-PREDICTION MODES
    1.
    发明公开
    CODING OF INTRA-PREDICTION MODES 审中-实审

    公开(公告)号：EP4376407A1

    公开(公告)日：2024-05-29

    申请号：EP23211632.7

    申请日：2020-06-10

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    发明人： PFAFF, Jonathan ,  HINZ, Tobias ,  HELLE, Philipp ,  MERKLE, Philipp ,  STALLENBERGER, Björn ,  SCHÄFER, Michael ,  BROSS, Benjamin ,  WINKEN, Martin ,  SIEKMANN, Mischa ,  SCHWARZ, Heiko ,  MARPE, Detlev ,  WIEGAND, Thomas

    IPC分类号： H04N19/11 ,  H04N19/147 ,  H04N19/176 ,  H04N19/463 ,  H04N19/70

    CPC分类号： H04N19/11 ,  H04N19/147 ,  H04N19/176 ,  H04N19/463 ,  H04N19/70

    摘要： There are disclosed techniques for block-based predicting a block of a picture efficiently, like an apparatus (3000) for decoding a predetermined block (18) of a picture (10) using intra-prediction, configured to derive a set-selective syntax element (522) from the data stream (12) which indicates whether the predetermined block (18) is to be predicted using one of a first set (508) of intra-prediction modes comprising a DC intra prediction mode (506) and angular prediction modes (500). If the set-selective syntax element (522) indicates that the predetermined block (18) is to be predicted using one of the first set (508) of intra-prediction modes, the apparatus is configured to form a list (528) of most probable intra-prediction modes on the basis of intra-prediction modes (3050) using which neighbouring blocks (524, 526) neighbouring the predetermined block (18) are predicted, derive a MPM list index (534) from the data stream (12) which points into the list (528) of most probable intra-prediction modes onto a predetermined intra-prediction mode (3100) and intra-predict the predetermined block (18) using the predetermined intra-prediction mode (3100). If the set-selective syntax element (522) indicates that the predetermined block (18) is not to be predicted using one of the first set (508) of intra-prediction modes, the apparatus is configured to derive a further index (540; 546) from the data stream (12) which indicates a predetermined matrix-based intra-prediction mode (3200) out of a second set (520) of matrix-based intra-prediction modes (510), compute a matrix-vector product (512) between a vector (514, 400, 402) derived from reference samples (17) in a neighbourhood of the predetermined block (18) and a predetermined prediction matrix (516) associated with the predetermined matrix-based intra-prediction mode (3200) so as to obtain a prediction vector (518), and predict samples of the predetermined block (18) on the basis of the prediction vector (518). The list (528) of most probable intra-prediction modes is formed on the basis of intra-prediction modes (3050) using which neighbouring blocks (524, 526) neighbouring the predetermined block (18) are predicted such that the list (528) of most probable intra-prediction modes is free of the DC intra prediction mode (506) in case of the neighbouring blocks (524, 526) being predicted by any of the angular intra prediction modes (500).

    PICTURE CODING SUPPORTING BLOCK MERGING AND SKIP MODE
    10.
    发明公开
    PICTURE CODING SUPPORTING BLOCK MERGING AND SKIP MODE 审中-公开
    BILDCODIERUNG MITUNTERSTÜTZUNGVON BLOCKFUSION UNDÜBERSPRINGUNGSMODUS

    公开(公告)号：EP2636218A1

    公开(公告)日：2013-09-11

    申请号：EP11781501.9

    申请日：2011-11-04

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

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

    IPC分类号： H04N7/26

    CPC分类号： H04N19/52 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/50 ,  H04N19/70

    摘要： 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.

    摘要翻译： 通过使用比特流内的公共信号化来实现编码效率提高，关于激活合并和激活跳过模式。 比特流内的一个或多个语法元素的一个可能状态可以针对样本集合要合并的图像的当前采样集合而信号通知，并且没有编码并插入到比特流中的预测残差。 公共标志可以用信号通知根据合并候选来设置与当前样本组相关联的编码参数，还是要从比特流中检索，以及是否根据预测信号来重新构建图像的当前采样集 取决于与当前样本集相关联的编码参数，没有任何残差数据，或者通过根据比特流内剩余数据与当前采样集相关联的编码参数精化预测信号来重构。