发明名称 |
ADAPTIVE DE-BLOCKING FILTERING APPARATUS AND METHOD FOR MPEG VIDEO DECODER |
摘要 |
A post processing de-blocking filter includes a threshold determination unit for adaptively determining a plurality of threshold values according to at least differences in quantization parameters QPs of a plurality of adjacent blocks in a received video stream and to a user defined offset (UDO) allowing the threshold levels to be adjusted according to the UDO value; an interpolation unit for performing an interpolation operation to estimate pixel values in an interlaced field if the video stream comprises interlaced video; and a de-blocking filtering unit for determining a filtering range specifying a maximum number of pixels to filter around a block boundary between the adjacent blocks, determining a region mode according to local activity around the block boundary, selecting one of a plurality of at least three filters, and filtering a plurality of pixels around the block boundary according to the filtering range, the region mode, and the selected filter.
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申请公布号 |
US2005243912(A1) |
申请公布日期 |
2005.11.03 |
申请号 |
US20040709337 |
申请日期 |
2004.04.29 |
申请人 |
KWON DO-KYOUNG;SHEN MEI-YIN;KUO CHUNG-CHIEH |
发明人 |
KWON DO-KYOUNG;SHEN MEI-YIN;KUO CHUNG-CHIEH |
分类号 |
H04N7/12;H04N7/26;H04N7/50;(IPC1-7):H04N7/12 |
主分类号 |
H04N7/12 |
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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