发明名称 |
Pre-filtering for plasma display panel signal |
摘要 |
<p>When the observation point on a PDP screen moves, artefacts will be introduced which are commonly described as "dynamic false contour". A simple way to reduce this effect requires the use of more sub-fields at the expense of panel brightness. A first idea called Bit-Line-Repeat (BLR) makes it possible to exchange vertical resolution with addressing time in order to dispose of more sub-fields for the same brightness. Nevertheless, such a solution introduces some vertical artefacts mostly during movement. Therefore, before the step of sub-field encoding a vertically filtering of the picture divided into pixel blocks is performed, wherein each block includes at least one pixel in horizontal direction and a number of pixels corresponding to the number of common lines in vertical direction. The effect of the pre-filtering step is that the difference of brightness values within each pixel block is limited to a predetermined value. In that case the BLR introduces only a slight vertical loss free from motion artefacts. <IMAGE></p> |
申请公布号 |
EP1253575(A1) |
申请公布日期 |
2002.10.30 |
申请号 |
EP20010250151 |
申请日期 |
2001.04.27 |
申请人 |
DEUTSCHE THOMSON-BRANDT GMBH |
发明人 |
WEITBRUCH, SEBASTIEN, DIPL.-ING.;CORREA, CARLOS, DIPL.-ING.;ZWING, RAINER, DIPL.-ING. |
分类号 |
G09G3/20;G09G3/28;(IPC1-7):G09G3/28 |
主分类号 |
G09G3/20 |
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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