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58 条记录 (耗时 0.023 秒)

    Non-linear mapping based filter use in loop filter chain
    1.
    发明授权
    Non-linear mapping based filter use in loop filter chain 有权

    公开(公告)号：US12088853B2

    公开(公告)日：2024-09-10

    申请号：US18328480

    申请日：2023-06-02

    申请人： Tencent America LLC

    发明人： Yixin Du ,  Xin Zhao ,  Shan Liu

    IPC分类号： H04N19/00 ,  H04N19/186 ,  H04N19/82 ,  H04N19/86

    CPC分类号： H04N19/82 ,  H04N19/186 ,  H04N19/86

    摘要： A method for filtering includes determining, by a processor, a first offset value by applying a non linear mapping based filter to first reconstructed samples at a first node along a loop filter chain that includes a plurality of video filters. The method further includes applying, by the processor, the first offset value to an intermediate reconstructed sample at a second node along the loop filter chain to generate a second reconstructed sample, wherein the second node is one of an input node of the loop filter chain or an output node of the loop filter chain.

    Method and apparatus for video coding
    3.
    发明授权
    Method and apparatus for video coding 有权

    公开(公告)号：US11706461B2

    公开(公告)日：2023-07-18

    申请号：US17495318

    申请日：2021-10-06

    申请人： Tencent America LLC

    发明人： Xin Zhao ,  Yixin Du ,  Shan Liu

    IPC分类号： H04N19/82 ,  H04N19/172 ,  H04N19/593 ,  H04N19/86 ,  H04N19/186 ,  H04N19/132

    CPC分类号： H04N19/82 ,  H04N19/132 ,  H04N19/172 ,  H04N19/186 ,  H04N19/593 ,  H04N19/86

    摘要： Aspects of the disclosure provide methods and apparatus for video decoding. Processing circuitry of the apparatus decodes coded information for a reconstructed sample of a current component in a current picture from a coded video bitstream. The coded information indicates a sample offset filter to be applied to the reconstructed sample. A filter shape of the sample offset filter is one of a plurality of filter shapes. Each of the plurality of filter shapes includes first reconstructed samples of a first component in the current picture. A filtered sample value of the reconstructed sample is determined based on the first reconstructed samples in the filter shape. The sample offset filter is an in-loop filter by which the output value is applied to the reconstructed sample as an offset to filter out coding artifacts while retaining details of the current component in the current picture.

    Sample offset with predefined filters
    7.
    发明授权
    Sample offset with predefined filters 有权

    公开(公告)号：US11818343B2

    公开(公告)日：2023-11-14

    申请号：US17568540

    申请日：2022-01-04

    申请人： TENCENT AMERICA LLC

    发明人： Xin Zhao ,  Yixin Du ,  Shan Liu

    IPC分类号： H04N19/117 ,  H04N19/82 ,  H04N19/186 ,  H04N19/46 ,  H04N19/132

    CPC分类号： H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/46 ,  H04N19/82

    摘要： A method for in-loop sample offset filtering in a video decoder is disclosed. The method includes extracting at least one loop filtering parameter from a coded video bitstream for a reconstructed sample of a first color component in a current picture reconstructed from the coded video bitstream, the at least one loop filtering parameter comprising a flag, and determining based on the flag a type of sample offset filter to be applied to the reconstructed sample of the first color component, the type of sample offset filter being either a predefined sample offset filter type or an encoder-derived sample offset filter type. The method further includes identifying a target sample offset filter to be applied to the reconstructed sample of the first color component based at least on the determined type of sample offset filter, and filtering the reconstructed sample of the first color component based on the target sample offset filter and a plurality of reconstructed reference samples of a second color component to generate a filtered reconstructed sample of the first color component.

    Method and apparatus for video coding
    9.
    发明授权
    Method and apparatus for video coding 有权

    公开(公告)号：US11671631B2

    公开(公告)日：2023-06-06

    申请号：US17495318

    申请日：2021-10-06

    申请人： Tencent America LLC

    发明人： Xin Zhao ,  Yixin Du ,  Shan Liu

    IPC分类号： H04N19/82 ,  H04N19/172 ,  H04N19/593 ,  H04N19/86 ,  H04N19/186 ,  H04N19/132

    CPC分类号： H04N19/82 ,  H04N19/132 ,  H04N19/172 ,  H04N19/186 ,  H04N19/593 ,  H04N19/86

    摘要： Aspects of the disclosure provide methods and apparatus for video decoding. Processing circuitry of the apparatus decodes coded information for a reconstructed sample of a current component in a current picture from a coded video bitstream. The coded information indicates a sample offset filter to be applied to the reconstructed sample. A filter shape of the sample offset filter is one of a plurality of filter shapes. Each of the plurality of filter shapes includes first reconstructed samples of a first component in the current picture. A filtered sample value of the reconstructed sample is determined based on the first reconstructed samples in the filter shape. The sample offset filter is an in-loop filter by which the output value is applied to the reconstructed sample as an offset to filter out coding artifacts while retaining details of the current component in the current picture.

    Flexible picture partitioning
    10.
    发明授权
    Flexible picture partitioning 有权

    公开(公告)号：US11412222B2

    公开(公告)日：2022-08-09

    申请号：US17098918

    申请日：2020-11-16

    申请人： TENCENT AMERICA LLC

    发明人： Liang Zhao ,  Xin Zhao ,  Yixin Du ,  Shan Liu

    IPC分类号： H04N19/119 ,  H04N19/46 ,  H04N19/172 ,  H04N19/169 ,  H04N19/70

    摘要： Systems and methods may provide flexible picture partitioning, a method includes receiving a coded picture that is partitioned into a plurality of coding tree units (CTUs), wherein at least one row or column of CTUs, among the plurality of CTUs of the coded picture, that is adjacent to a boundary of the coded picture has a size dimension that is smaller than a corresponding size dimension of each CTU among the plurality of CTUs that is not adjacent to any boundary of the coded picture; and decoding the coded picture based on the plurality of CTUs, wherein the at least one row or column of CTUs includes a first CTU row or a first CTU column of the coded picture that is adjacent to a top boundary or left boundary of the coded picture, respectively.