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    BLOCK SIZE BASED TRANSFORM RESTRICTIONS
    84.
    发明公开
    BLOCK SIZE BASED TRANSFORM RESTRICTIONS 审中-公开

    公开(公告)号：US20240196013A1

    公开(公告)日：2024-06-13

    申请号：US18539475

    申请日：2023-12-14

    申请人： INTERDIGITAL VC HOLDINGS, INC.

    发明人： Fabrice LELEANNEC ,  Franck GALPIN ,  Tangi POIRIER

    IPC分类号： H04N19/61 ,  H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/176

    CPC分类号： H04N19/61 ,  H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/176

    摘要： A coding unit having a size multiple of three in horizontal or vertical direction is coded through one of several embodiments. In one embodiment, for some block sizes, the coding unit is coded and decoded systematically through SKIP mode. In another embodiment, the coding units can be coded in SKIP mode or with a DC coefficient. In another embodiment, an asymmetric division of a common coding unit parent is performed and transform coefficients are factorized among at least two sub-blocks to encode a coding unit. In another embodiment, a separable two dimensional transform can be applied by applying a transform over the block in one direction, and using two one-dimensional transforms on sub-blocks in the other direction to code. Methods, apparatus, and signal embodiments are provided for encoding and decoding.

    VIDEO INTER/INTRA COMPRESSION USING MIXTURE OF EXPERTS
    85.
    发明公开
    VIDEO INTER/INTRA COMPRESSION USING MIXTURE OF EXPERTS 审中-公开

    公开(公告)号：US20240195985A1

    公开(公告)日：2024-06-13

    申请号：US18286574

    申请日：2021-05-07

    申请人： Google LLC

    发明人： David Charles Minnen ,  Sung Jin Hwang ,  Elliott Michael Karpilovsky ,  Debargha Mukherjee

    IPC分类号： H04N19/176 ,  H04N19/119 ,  H04N19/159

    CPC分类号： H04N19/176 ,  H04N19/119 ,  H04N19/159

    摘要： Methods, systems, and apparatus, including computer programs, for compression and decompression of video data using an ensemble of machine learning models. Methods can include defining for each frame in a video, a plurality of blocks in the frame. Methods can further include processing the frames of video in sequential sets, wherein each sequential set is at least a current frame (220) of video and a prior frame (240) of video in the ordered sequence. Each respective prediction of a block in the frame of the video includes providing, as input to a prediction model a first and the second border (235,230) of a current block (225) of the current frame, a first and a second border (250, 255) for a respective current block (245) of the prior frame and the respective current block (245) of the prior frame.

    SUBBLOCK-BASED ADAPTIVE INTERPOLATION FILTER IN DIGITAL VIDEO CODING
    87.
    发明公开
    SUBBLOCK-BASED ADAPTIVE INTERPOLATION FILTER IN DIGITAL VIDEO CODING 审中-公开

    公开(公告)号：US20240195959A1

    公开(公告)日：2024-06-13

    申请号：US18442830

    申请日：2024-02-15

    申请人： Nader Mahdi

    发明人： Nader Mahdi

    IPC分类号： H04N19/117 ,  H04N19/119 ,  H04N19/176 ,  H04N19/82

    CPC分类号： H04N19/117 ,  H04N19/119 ,  H04N19/176 ,  H04N19/82

    摘要： In block-based video compression, interpolation filters may be used in the process of motion compensation or in block-prediction to blend the pixels in the predicted block spatially and generate the reconstructed block. However, the content within a block can vary significantly across the block and using a single interpolation filter type for the entire block may not be sufficient to provide effective motion compensation. To address the concern more effectively, a subblock adaptive interpolation filtering approach can be implemented in a video codec to improve the quality of the reconstructed block while being able to keep file sizes small. Subblock adaptive interpolation filtering can be implemented by using different interpolation filter types for each subblock of the block. Subblock adaptive interpolation filtering can result in improved motion compensation and higher video quality.