发明名称 |
Low-complexity deblocking filter |
摘要 |
A method of filtering to remove coding artifacts introduced at block edges in a block-based video coder, the method having the steps of: checking the content activity on every line of samples belonging to a boundary to be filtered and where content activity is based on a set of adaptively selected thresholds determined using Variable-Shift Table Indexing (VSTI); determining whether the filtering process will modify the sample values on that particular line based on said content activity; and selecting a filtering mode between at least two filtering modes to apply on a block boundary basis, implying that there would be no switching between the two primary modes on a line by line basis along a given block boundary. The two filtering modes include a default mode based on a non-recursive filter, and a strong filtering mode which features two strong filtering sub-modes and a new selection criterion that is one-sided with respect to the block boundary to determine which of the two strong filtering sub-modes to use. The two strong filtering sub-modes include a new 3-tap filter sub-mode and a 5-tap filter sub-mode that permits a more efficient implementation of the filter.
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申请公布号 |
US8005151(B2) |
申请公布日期 |
2011.08.23 |
申请号 |
US20070654570 |
申请日期 |
2007.01.18 |
申请人 |
JOCH ANTHONY;AU JAMES;LIN BRANDON |
发明人 |
JOCH ANTHONY;AU JAMES;LIN BRANDON |
分类号 |
H04N7/18;H04N7/12;H04N7/26 |
主分类号 |
H04N7/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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