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公开(公告)号：US20240146916A1
公开(公告)日：2024-05-02
申请号：US18262227
申请日：2022-03-02
发明人： Dongping PAN , Yucheng SUN , Fangdong CHEN , Li WANG
IPC分类号： H04N19/117 , H04N19/105 , H04N19/182 , H04N19/80
CPC分类号： H04N19/117 , H04N19/105 , H04N19/182 , H04N19/80
摘要： Filtering methods, apparatus, and devices are provided. In one aspect, a filtering method includes: determining whether enhanced adaptive leveling filtering is enabled for a current adaptive leveling filtering unit; if it is determined that the enhanced adaptive leveling filtering is enabled for the current adaptive leveling filtering unit, performing adaptive leveling filtering on the current adaptive leveling filtering unit by using a first filter; if it is determined that the enhanced adaptive leveling filtering is disabled for the current adaptive leveling filtering unit, performing adaptive leveling filtering on the current adaptive leveling filtering unit by using a second filter. The first filter includes a centrosymmetric filter with a 7*7 cross shape plus a 5*5 square shape, and the second filter includes a centrosymmetric filter with a 7*7 cross shape plus a 3*3 square shape.
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公开(公告)号：US20230209051A1
公开(公告)日：2023-06-29
申请号：US18173776
申请日：2023-02-23
发明人： Dongping PAN , Yucheng SUN , Fangdong CHEN , Li WANG
IPC分类号： H04N19/117 , H04N19/182 , H04N19/119 , H04N19/167 , H04N19/105
CPC分类号： H04N19/117 , H04N19/182 , H04N19/119 , H04N19/167 , H04N19/105
摘要： A filtering method and apparatus, and a device are provided. The filtering method includes: when it is determined to enable Wiener filtering for an adaptive leveling filter unit of a current picture, deriving the adaptive leveling filter unit from a current Largest Coding Unit (LCU) of the current picture; obtaining reference pixels of the adaptive leveling filter unit and filter coefficients of a Wiener filter; and according to the reference pixels and the filter coefficients of the Wiener filter, performing the Wiener filtering based on sample pixels of the adaptive leveling filter unit; where the Wiener filter is a centrosymmetric filter with a shape of a 7*7 cross plus a 5*5 square, and values of the reference pixels are derived from pixel values of a reconstructed picture before the Wiener filtering.
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