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    Adaptive overlapped block prediction in variable block size video coding
    11.
    发明授权
    Adaptive overlapped block prediction in variable block size video coding 有权

    公开(公告)号：US10390033B2

    公开(公告)日：2019-08-20

    申请号：US15173881

    申请日：2016-06-06

    申请人： GOOGLE LLC

    发明人： Debargha Mukherjee ,  Yue Chen

    IPC分类号： G06T7/20 ,  G06T9/00 ,  H04N19/44 ,  H04N19/50 ,  H04N19/107 ,  H04N19/119 ,  H04N19/157 ,  H04N19/176 ,  H04N19/182 ,  H04N19/583

    摘要： Decoding a current block of an encoded video stream may include generating a base prediction block for the current block based on current prediction parameters associated with the current block, identifying adjacent prediction parameters used for decoding a previously decoded adjacent block that is adjacent to the current block, and determining an overlap region within the current block and adjacent to the adjacent block. The overlap region has a size being determined as a function of a difference between the first prediction parameters and the adjacent prediction parameters. For each pixel within the overlap region, an overlapped prediction of a pixel value may be generated as a function of the base prediction and a prediction based on the adjacent prediction parameters.

    COMBINATION OF MODE-DEPENDENT AND FIXED TRANSFORM TYPES IN VIDEO CODING
    13.
    发明公开
    COMBINATION OF MODE-DEPENDENT AND FIXED TRANSFORM TYPES IN VIDEO CODING 审中-公开

    公开(公告)号：US20240323361A1

    公开(公告)日：2024-09-26

    申请号：US18678031

    申请日：2024-05-30

    申请人： GOOGLE LLC

    发明人： Lester Lu ,  Debargha Mukherjee ,  Elliott Karpilovsky

    IPC分类号： H04N19/107 ,  H04N19/122 ,  H04N19/176 ,  H04N19/50

    CPC分类号： H04N19/107 ,  H04N19/122 ,  H04N19/176 ,  H04N19/50

    摘要： Decoding video data includes, for a block encoded using a prediction mode, determining a transform mode for the block using the prediction mode. The transform mode is a first mode when the prediction mode is an inter-prediction mode and is a second mode when the prediction mode is an intra-prediction mode. The first mode is an available first transform type that is a combination of transforms selected from first fixed transforms and first learned transforms that each comprise a respective transformation matrix generated iteratively using blocks predicted using the inter-prediction mode. The second mode is an available second transform type that is a combination of transforms selected from second fixed transforms, which is a proper subset of the first fixed transforms, and a second learned transform comprising a transformation matrix that is generated iteratively using blocks predicted using the intra-prediction mode. Decoding the block uses the prediction and transform modes.

    TRANSFORM PREDICTION WITH PARSING INDEPENDENT CODING
    14.
    发明公开
    TRANSFORM PREDICTION WITH PARSING INDEPENDENT CODING 审中-公开

    公开(公告)号：US20240205458A1

    公开(公告)日：2024-06-20

    申请号：US18542850

    申请日：2023-12-18

    申请人： GOOGLE LLC

    发明人： Onur Guleryuz ,  Zeyu Deng ,  Debargha Mukherjee ,  Lester Lu ,  Yue Chen

    IPC分类号： H04N19/61 ,  H04N19/105 ,  H04N19/12 ,  H04N19/124 ,  H04N19/13 ,  H04N19/172 ,  H04N19/176 ,  H04N19/42

    CPC分类号： H04N19/61 ,  H04N19/105 ,  H04N19/12 ,  H04N19/124 ,  H04N19/13 ,  H04N19/172 ,  H04N19/176 ,  H04N19/42 ,  H04N19/70

    摘要： Transform prediction with parsing independent coding includes generating a reconstructed frame and outputting the reconstructed frame. Generating the reconstructed frame includes entropy decoding transform blocks for the reconstructed frame, entropy decoding decoded transform identifiers for the transform blocks, obtaining transform-specific probability distributions for available transforms, and, for a current transform block from the transform blocks, identifying a current remapped transform identifier from the decoded transform identifiers, identifying a current transform identifier in accordance with the current remapped transform identifier, the transform coefficients from the current transform block, and the transform-specific probability distributions, identifying a current transform in accordance with the current transform identifier; inverse transforming, in accordance with the current transform, the current transform block to obtain a current residual block and obtaining a current reconstructed block using the current residual block. Generating the reconstructed frame includes including the current reconstructed block in the reconstructed frame.

    Image and video coding using machine learning prediction coding models
    17.
    发明授权
    Image and video coding using machine learning prediction coding models 有权

    公开(公告)号：US11601644B2

    公开(公告)日：2023-03-07

    申请号：US16295176

    申请日：2019-03-07

    申请人： GOOGLE LLC

    发明人： Debargha Mukherjee ,  Urvang Joshi ,  Yue Chen ,  Sarah Parker

    IPC分类号： H04N19/107 ,  H04N19/105 ,  H04N19/154 ,  H04N19/184 ,  G06N20/00 ,  G06N3/04 ,  G06N3/08

    摘要： Video coding may include generating, by a processor, a decoded frame by decoding a current frame from an encoded bitstream and outputting a reconstructed frame based on the decoded frame. Decoding includes identifying a current encoded block from the current frame, identifying a prediction coding model for the current block, wherein the prediction coding model is a machine learning prediction coding model from a plurality of machine learning prediction coding models, identifying reference values for decoding the current block based on the prediction coding model, obtaining prediction values based on the prediction coding model and the reference values, generating a decoded block corresponding to the current encoded block based on the prediction values, and including the decoded block in the decoded frame.

    Intra Prediction for Image and Video Compression
    18.
    发明申请
    Intra Prediction for Image and Video Compression 有权

    公开(公告)号：US20230050660A1

    公开(公告)日：2023-02-16

    申请号：US17793620

    申请日：2020-05-14

    申请人： GOOGLE LLC

    发明人： James Bankoski ,  Debargha Mukherjee

    IPC分类号： H04N19/593 ,  H04N19/196 ,  H04N19/167 ,  H04N19/105 ,  H04N19/176 ,  H04N19/59 ,  H04N19/159

    摘要： A method for intra-prediction of a current block includes selecting peripheral pixels of the current block, where the peripheral pixels are used to generate a prediction block for the current block; for each prediction pixel of the prediction block, performing steps including selecting two respective pixels of the peripheral pixels; and calculating the prediction pixel by interpolating at least the two respective pixels; and coding a residual block corresponding to a difference between the current block and the prediction block.

    COMPOUND PREDICTION FOR VIDEO CODING
    19.
    发明申请
    COMPOUND PREDICTION FOR VIDEO CODING 有权

    公开(公告)号：US20220256186A1

    公开(公告)日：2022-08-11

    申请号：US17731470

    申请日：2022-04-28

    申请人： GOOGLE LLC

    发明人： Debargha Mukherjee ,  James Bankoski ,  Yue Chen ,  Yuxin Liu ,  Sarah Parker

    IPC分类号： H04N19/517 ,  H04N19/46 ,  H04N19/136 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/182

    摘要： Generating a compound predictor block for a current block of video includes generating, for the current block, a first predictor block using one of inter-prediction or intra-prediction and generating a second predictor block. The first predictor block includes a first pixel and the second predictor block includes a second pixel that is co-located with the first pixel. A first weight is determined for the first pixel using a difference between a value of the first pixel and a value of the second pixel. A second weight is determined for the second pixel using the first weight. The compound predictor block is generated by combining the first predictor block and the second predictor block. The compound predictor block includes a weighted pixel that is determined using a weighted sum of the first pixel and the second pixel using the first weight and the second weight.

    GUIDED RESTORATION OF VIDEO DATA USING NEURAL NETWORKS
    20.
    发明申请
    GUIDED RESTORATION OF VIDEO DATA USING NEURAL NETWORKS 有权

    公开(公告)号：US20220207654A1

    公开(公告)日：2022-06-30

    申请号：US17698116

    申请日：2022-03-18

    申请人： GOOGLE LLC

    发明人： Debargha Mukherjee ,  Urvang Joshi ,  Yue Chen ,  Sarah Parker

    IPC分类号： G06T5/00 ,  G06T5/50 ,  G06N3/08 ,  G06N3/04 ,  G06N20/20 ,  G06T3/40 ,  H04N19/70 ,  H04N19/176 ,  G06K9/62 ,  G06T9/00

    摘要： Guided restoration is used to restore video data degraded from a video frame. The video frame is divided into restoration units (RUs) which each correspond to one or more blocks of the video frame. Restoration schemes are selected for each RU. The restoration schemes may indicate to use one of a plurality of neural networks trained for the guided restoration. Alternatively, the restoration schemes may indicate to use a neural network and a filter-based restoration tool. The video frame is then restored by processing each RU according to the respective selected restoration scheme. During encoding, the restored video frame is encoded to an output bitstream, and the use of the selected restoration schemes may be signaled within the output bitstream. During decoding, the restored video frame is output to an output video stream.