Pre-filtering for a Plasma Display Panel Signal
    1.
    发明公开
    Pre-filtering for a Plasma Display Panel Signal 有权
    Verfahren zum Filtrieren den datestromes einer Plasmaenzeigetafel

    公开(公告)号:EP1260957A1

    公开(公告)日:2002-11-27

    申请号:EP02290943.6

    申请日:2002-04-15

    IPC分类号: G09G3/28

    摘要: 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.

    摘要翻译: 当PDP屏幕上的观察点移动时,将引入通常被描述为“动态假轮廓”的伪影。 减少这种效果的一种简单方法需要以面板亮度为代价使用更多的子领域。 称为位线重复(BLR)的第一个想法使得可以以寻址时间交换垂直分辨率,以便处理相同亮度的更多子场。 然而,这样的解决方案主要在运动过程中引入一些垂直的人工制品。 因此,在对分割为像素块的图像进行垂直滤波的子场编码之前,进行水平方向的至少一个像素和与垂直方向的公共线数相对应的像素数。 预滤波步骤的效果是每个像素块内的亮度差的差被限制在预定值。 在这种情况下,BLR仅引入轻微的垂直损失,而不受运动伪影。

    Method and apparatus for processing video pictures to improve grey scale resolution of a display device
    2.
    发明公开
    Method and apparatus for processing video pictures to improve grey scale resolution of a display device 审中-公开
    用于处理视频图片以改善显示装置的灰度分辨率的方法和设备

    公开(公告)号:EP1353315A1

    公开(公告)日:2003-10-15

    申请号:EP03290429.4

    申请日:2003-02-21

    IPC分类号: G09G3/28

    摘要: The present invention relates to a method for improving grey scale fidelity portrayal of pictures displayed on matrix display screens. The method comprises the following steps :

    a) for a given peak white level, distributing the sustain pulses among the sub-fields, the number of pulses corresponding to the sub-field weighting,
    b) mapping the sub-field codes to luminance codes,
    c) re-ordering luminance codes in a definite order,
    d) mapping the video levels to the available luminance codes,
    e) processing the video levels to achieve intermediate levels of luminance
    f) then, mapping luminance codes to the output sub-field codes.

    The method is used in plasma display panels (P DP).

    摘要翻译: 本发明涉及一种用于改善在矩阵显示屏上显示的图像的灰度保真度描绘的方法。 该方法包括以下步骤:a)对于给定的峰值白电平,在子场中分配维持脉冲,对应于子场加权的脉冲数,b)将子场编码映射到亮度代码, c)以确定的顺序重新排序亮度代码,d)将视频级别映射到可用亮度代码,e)处理视频级别以实现中等亮度f),然后将亮度代码映射到输出子场代码 。 该方法用于等离子显示面板(P DP)。