发明名称 |
Method and apparatus for dynamic contrast improvement in video pictures |
摘要 |
A method and apparatus for dynamic contrast improvement in video pictures. There is a strong demand for picture contrast but each video display has a limited dynamic range. The picture contrast can't be increased by simply increasing the video signal amplitude because exceeding the display dynamic range in some video scenes causes unwanted disturbing effects. According to the present invention the video pictures are analysed framewise in real time and the parameters of a transfer function for contrast improvement are adjusted depending on the analysis results for the best subjective picture quality.
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申请公布号 |
US6285413(B1) |
申请公布日期 |
2001.09.04 |
申请号 |
US19990324495 |
申请日期 |
1999.06.02 |
申请人 |
DEUTSCHE THOMSON-BRANDT GMBH |
发明人 |
AKBAYIR SAHMUSA |
分类号 |
H04N5/205;H04N5/20;H04N5/57;H04N9/73;(IPC1-7):H04N6/72 |
主分类号 |
H04N5/205 |
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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