公开(公告)号：US20220116606A1

公开(公告)日：2022-04-14

申请号：US17559559

申请日：2021-12-22

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

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

IPC分类号： H04N19/12 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

摘要： An apparatus configured to select a predetermined intra prediction mode out of a plurality of intra-prediction modes which includes a first set of intra-prediction modes and a second set of matrix-based intra-prediction modes. The apparatus is configured to select a subset of one or more secondary transforms dependent on the predetermined intra prediction mode so that the subset is nonempty in case of the predetermined intra prediction mode being contained in the first set of intra-prediction modes or in the second set of matrix-based intra-prediction modes. The apparatus is configured to derive a transformed version of a prediction residual for a predetermined block, which is related to a spatial domain version of the prediction residual of the predetermined block via a transform defined by a concatenation of a primary transform and a predetermined secondary transform out of the subset of secondary transforms.

公开(公告)号：US20210392331A1

公开(公告)日：2021-12-16

申请号：US17460996

申请日：2021-08-30

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

发明人： Jonathan PFAFF ,  Philipp HELLE ,  Michael SCHÄFER ,  Tobias HINZ ,  Björn STALLENBERGER ,  Philipp MERKLE ,  Heiko SCHWARZ ,  Detlev MARPE ,  Thomas WIEGAND

IPC分类号： H04N19/13 ,  H04N19/70 ,  H04N19/46 ,  H04N19/176

摘要： An apparatus includes an encoder, which receives image or video data, encodes the data and provides a bitstream representing the data. The encoder includes a CABAC encoder, which receives a binary valued syntax element associated with a block of the data to be encoded, and encodes, using a selected context model, the syntax element into coded bits for the bitstream. The syntax element includes a tool flag indicating whether or not certain coding tool, like linear weighted intra prediction, is employed when encoding a block of the data. For a block of the data which exhibits an aspect ratio larger than 2 and for a block of the data which exhibits an aspect ratio less than or equal to 2, and to which blocks the certain coding tool is applicable, first and second context models for encoding the tool flag are selected from a group of one or more first and second context models, respectively.

公开(公告)号：US20210136386A1

公开(公告)日：2021-05-06

申请号：US17145050

申请日：2021-01-08

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

发明人： Martin WINKEN ,  Christian BARTNIK ,  Philipp HELLE ,  Mischa SIEKMANN ,  Jonathan PFAFF ,  Detlev MARPE ,  Heiko SCHWARZ ,  Thomas WIEGAND

IPC分类号： H04N19/139 ,  H04N19/176 ,  H04N19/117 ,  H04N19/577 ,  H04N19/109

摘要： A video encoder for encoding a video into a data stream using motion compensated prediction for inter predicted blocks, comprising a hypothesis number control, configured to control a number of prediction hypotheses of the inter predicted blocks within a predetermined portion of the video to meet a predetermined criterion.