发明名称 |
METHOD AND APPARATUS FOR ENCODING A FLASH PICTURE OCCURRING IN A VIDEO SEQUENCE, AND FOR DECODING CORRESPONDING DATA FOR A FLASH PICTURE |
摘要 |
When video sequences are obtained from e.g. news, interviews, conferences and sports matches, flashlight often appears in the video due to photographing. When encoding the video sequence, the intensity changes a lot so that the motion estimation can not find a well-matching block in a previous picture. Accordingly, the video encoder will encode in intra mode and thereby generate much more bits than for the neighboring non-flash pictures. According to the invention, not the real flash picture is encoded in the video sequence but an artificial non-flash or de-flashed picture, and some indications and parameters are inserted into the bit stream to model the flash effect. The decoder can regenerate the flash picture by reconstructing the non-flash picture and then adding the flash effect. The number of bits required for coding flash pictures is thereby significantly reduced. |
申请公布号 |
EP2057846(A1) |
申请公布日期 |
2009.05.13 |
申请号 |
EP20060775577 |
申请日期 |
2006.09.01 |
申请人 |
THOMSON LICENSING |
发明人 |
CHEN, QUQING;CHEN, ZHIBO;GU, XIAODONG |
分类号 |
H04N19/172;H04N19/103;H04N19/14;H04N19/46;H04N19/85 |
主分类号 |
H04N19/172 |
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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