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    Loop filter utilized in encoder and associated signal processing method
    1.
    发明授权
    Loop filter utilized in encoder and associated signal processing method 有权

    公开(公告)号：US11770524B2

    公开(公告)日：2023-09-26

    申请号：US17524708

    申请日：2021-11-11

    申请人： Realtek Semiconductor Corp.

    发明人： Weimin Zeng ,  Chi-Wang Chai ,  Wei Li ,  Rong Zhang ,  Wujun Chen

    IPC分类号： H04N19/117 ,  H04N19/147 ,  H04N19/176 ,  H04N19/82

    CPC分类号： H04N19/117 ,  H04N19/147 ,  H04N19/176 ,  H04N19/82

    摘要： A loop filter utilized in an encoder includes a constrained directional enhancement filter and a decision circuit. The constrained directional enhancement filter is arranged to process multiple frames, wherein for a first frame in the multiple frames, the constrained directional enhancement filter determines a best filter strength of each block in the first frame in a first filter strength list, and determines a second filter strength list according to content of the first frame. The decision circuit is coupled to the constrained directional enhancement filter, and is arranged to record which index in the first filter strength list is the best filter strength corresponding to each block in the first frame, and provide the first filter strength list and the index corresponding to each block to an encoding circuit of the encoder as an output of the encoder.

    LOOP FILTER UTILIZED IN ENCODER AND ASSOCIATED SIGNAL PROCESSING METHOD
    2.
    发明公开
    LOOP FILTER UTILIZED IN ENCODER AND ASSOCIATED SIGNAL PROCESSING METHOD 审中-公开

    公开(公告)号：US20230141735A1

    公开(公告)日：2023-05-11

    申请号：US17524708

    申请日：2021-11-11

    申请人： Realtek Semiconductor Corp.

    发明人： Weimin Zeng ,  Chi-Wang Chai ,  Wei Li ,  Rong Zhang ,  Wujun Chen

    IPC分类号： H04N19/117 ,  H04N19/82 ,  H04N19/147 ,  H04N19/176

    CPC分类号： H04N19/117 ,  H04N19/82 ,  H04N19/147 ,  H04N19/176

    摘要： A loop filter utilized in an encoder includes a constrained directional enhancement filter and a decision circuit. The constrained directional enhancement filter is arranged to process multiple frames, wherein for a first frame in the multiple frames, the constrained directional enhancement filter determines a best filter strength of each block in the first frame in a first filter strength list, and determines a second filter strength list according to content of the first frame. The decision circuit is coupled to the constrained directional enhancement filter, and is arranged to record which index in the first filter strength list is the best filter strength corresponding to each block in the first frame, and provide the first filter strength list and the index corresponding to each block to an encoding circuit of the encoder as an output of the encoder.

    IMAGE PROCESSING METHOD AND ASSOCIATED ENCODER
    3.
    发明申请
    IMAGE PROCESSING METHOD AND ASSOCIATED ENCODER 有权

    公开(公告)号：US20210337192A1

    公开(公告)日：2021-10-28

    申请号：US16857187

    申请日：2020-04-24

    申请人： Realtek Semiconductor Corp.

    发明人： Weimin Zeng ,  Chi-Wang Chai ,  Wujun Chen ,  Jing Wang ,  Rong Zhang

    IPC分类号： H04N19/117 ,  H04N19/176 ,  H04N19/573 ,  H04N19/139

    摘要： An image processing method includes: determining a first block and a second block corresponding to a current block; dividing each of the current block, the first block and the second block into a plurality of clusters; for a cluster having a corresponding location within each of the current block, the first block and the second block, performing gradient calculations on pixel values within the cluster of the first block and pixel values within the cluster of the second block, and accordingly determining an adjustment value, wherein a window size of the cluster used in the gradient calculations is one or zero; and for a pixel within the cluster of the current block, referring to a pixel value of the pixel of the first block, a pixel value of the pixel of the second block and the adjustment value to calculate a pixel value of the pixel of the current block.