公开(公告)号：EP1936590B1

公开(公告)日：2016-07-20

申请号：EP07123403.3

申请日：2007-12-17

申请人： Thomson Licensing

发明人： Correa, Carlos ,  Weitbruch, Sébastien ,  Abdallah, Mohamed

IPC分类号： G09G5/02

CPC分类号： G09G3/2022 ,  G09G3/2029 ,  G09G3/28 ,  G09G5/026 ,  G09G2320/0261 ,  G09G2320/0266 ,  G09G2320/0271 ,  G09G2360/16

摘要： The present invention relates to a method and an apparatus for processing video pictures for dynamic false contour effect compensation. It comprises the steps of: - dividing each of the video pictures into at least a first type of area and a second type of area according to the video gradient of the picture, a specific video gradient range being associated to each type of area, - allocating a first set of sub-field code words to the first type of area and a second set of sub-field code words to the second type of area, the second set being a subset of the first set, - encoding the pixels of the first type of area with the first set of sub-field code words and encoding the pixels of the second type of area with the second set of sub-field code words, wherein, for at least one horizontal line of pixels comprising pixels of first type area and pixels of second type area, the area of second type is extended until the next pixel in the first type area is a pixel encoded by a sub-field code word belonging to both first and second set of sub-field code words.

公开(公告)号：EP1845510B1

公开(公告)日：2009-05-06

申请号：EP07105210.4

申请日：2007-03-29

申请人： Thomson Licensing

发明人： Weiterbruch, Sébastien ,  Correa, Carlos ,  Thebault, Cédric

IPC分类号： G09G3/28

CPC分类号： G09G3/2029 ,  G09G3/2003 ,  G09G3/2051 ,  G09G3/2803 ,  G09G2320/0261 ,  G09G2320/0266 ,  G09G2320/0271 ,  G09G2320/103

摘要： The gravity centred (GCC) coding shall be improved with respect to false contour effect disturbances on plasma display panels for example. Therefore, there is provided a GCC code and a motion amplitude of a picture or a part of a picture. Furthermore, there is provided at least one sub-set code of the GCC code. The video data are coded with the GCC code or the at least one sub-set code depending on the motion amplitude. Thus, it is possible to reduce the number of coding levels if the motion increases. A further improvement can be obtained by using texture information for selecting the GCC code.

公开(公告)号：EP1391867B1

公开(公告)日：2008-10-15

申请号：EP03292006.8

申请日：2003-08-11

申请人： Thomson Licensing

发明人： Weitbruch, Sébastien ,  Thebault, Cédric ,  Correa, Carlos

IPC分类号： G09G3/28

CPC分类号： G09G3/2051 ,  G09G3/2029 ,  G09G3/288 ,  G09G2320/0242 ,  G09G2320/0261 ,  G09G2320/0276

公开(公告)号：EP1768088A2

公开(公告)日：2007-03-28

申请号：EP06120447.5

申请日：2006-09-11

申请人： Thomson Licensing

发明人： Thebault, Cédric ,  Correa, Carlos ,  Weitbruch, Sébastien

IPC分类号： G09G3/20

CPC分类号： G09G3/2029 ,  G09G3/2051 ,  G09G3/2077 ,  G09G2320/0233 ,  G09G2320/0266 ,  G09G2320/0673 ,  G09G2360/16

摘要： The invention relates to a method and a device for encoding the luminance value of a pixel of a picture into a subfield code word in a display device. It can be applied to every display device using a PWM (Pulse Width Modulation) technology and subfields for displaying video picture. It can be used to compensate for any luminance problem that can be estimated. The general idea of the recursive coding is to encode one sub-field after the other in order to be able to compensate for problems occurring on one sub-field with the other sub-fields. More particularly, the bits of a subfield code word are computed recursively one after the other such that the defects (e.g. line load and/or linearity) in the light emission or luminance generated by a bit of the subfield code word can be compensated by the following bits of the subfield code word.

摘要翻译： 本发明涉及一种用于将图像的像素的亮度值编码为显示装置中的子字段代码字的方法和装置。 它可以应用于使用PWM（脉冲宽度调制）技术的每个显示设备和用于显示视频图像的子字段。 它可以用于补偿任何可以估计的亮度问题。 递归编码的一般思想是对一个子场进行编码，以便能够补偿在一个子场与其他子场发生的问题。 更具体地，副场码字的位逐个递归地计算，使得由子场码字的位产生的发光或亮度中的缺陷（例如，线路负载和/或线性度）可以由 子字段代码字的后续位。

公开(公告)号：EP1638068A1

公开(公告)日：2006-03-22

申请号：EP05108347.5

申请日：2005-09-12

申请人： Thomson Licensing

发明人： Weitbruch, Sebastien ,  Correa, Carlos ,  Thebault, Cedric

IPC分类号： G09G3/28

CPC分类号： G09G3/288 ,  G09G3/2029 ,  G09G2320/0276 ,  G09G2320/0285 ,  G09G2320/0673 ,  G09G2360/16

摘要： The present invention relates to a method and an apparatus for generating subfield codes for pictures displayed on a display device like plasma display panels (PDPs) or display devices wherein the grey level of the pixels of the pictures displayed by the display device is obtained by modulating the number of light pulses per frame or sustain pulses (PWM for Pulse Width Modulation), the number of sustain pulses per subfield of the frame depending on the power average level of the picture to be displayed. The video levels of the pictures are first transcoded into luminance codes and then coded into subfield codes. In order to reduce the memory size required for implementing this transcoding, offset values between luminance codes are stored in a look-up table instead of storing the luminance codes. The luminance codes are then regenerated in the controller of the display device.

摘要翻译： 本发明涉及一种用于生成显示在诸如等离子体显示面板（PDP）或显示装置的显示装置上的图像的子场编码的方法和装置，其中由显示装置显示的图像的像素的灰度级通过调制 每帧的光脉冲数或维持脉冲数（PWM用于脉冲宽度调制），根据要显示的图像的功率平均电平，每个子场的子场的维持脉冲数。 图像的视频电平首先被转码为亮度代码，然后被编码成子字段代码。 为了减少实现该代码转换所需的存储器大小，将亮度代码之间的偏移值存储在查找表中，而不是存储亮度代码。 然后在显示装置的控制器中重新生成亮度代码。

公开(公告)号：EP1359564B1

公开(公告)日：2005-11-09

申请号：EP03290986.3

申请日：2003-04-22

申请人： Thomson Licensing

发明人： Thebault, Cedric ,  Correa, Carlos ,  Weitbruch, Sébastien

IPC分类号： H04N5/44 ,  G09G3/28 ,  H04N5/21

CPC分类号： G09G3/2051 ,  G09G3/2029 ,  G09G3/2037 ,  G09G3/204 ,  G09G3/288 ,  G09G2320/0247 ,  G09G2320/0261 ,  G09G2320/0276 ,  H04N5/46 ,  H04N5/70 ,  H04N7/0132

公开(公告)号：EP1796065B1

公开(公告)日：2011-09-28

申请号：EP06125606.1

申请日：2006-12-07

申请人： Thomson Licensing

发明人： Thebault, Cédric ,  Correa, Carlos ,  Weitbruch, Sébastien

IPC分类号： G09G3/28

CPC分类号： G09G3/2803 ,  G09G3/2944 ,  G09G2320/0271 ,  G09G2320/0606 ,  G09G2320/0626 ,  G09G2320/066 ,  G09G2330/045 ,  G09G2360/16

摘要： A picture quality when reducing the brightness or the contrast of the picture on a plasma panel (1) shall be improved. For this purpose there is provided a driving apparatus including brightness/contrast control means (5) for receiving video input data for modifying the video levels of the video input data in accordance with external adjustment data and for outputting modified video data. First power measurement means (10) measure a power level of the modified video data and supply a first power level. Second power measurement means (11) measure a power level of the video input data and supply a second power level. Generator means (12) generate a third power level comprised between the first power level and the second power level or equal to the larger one to data processing means (6, 7, 8, 9). The data processing means (6, 7, 8, 9) calculate the maximum number of sustain pulses per frame applicable to the modified video data on the basis of the third power level and control the display of the modified video data on the plasma display panel (1).Thus, the number of gray levels can be increased and the picture quality improves significantly.

公开(公告)号：EP2264691A1

公开(公告)日：2010-12-22

申请号：EP09305560.6

申请日：2009-06-18

申请人： Thomson Licensing

发明人： Correa, Carlos ,  Thébault, Cédric

IPC分类号： G09G3/288

CPC分类号： G09G3/293 ,  G09G2310/02 ,  G09G2310/0213 ,  G09G2330/021

摘要： Method and apparatus for reducing driver energy consumption of drivers of a display device each supplied by an input codeword as e.g. for data drivers of a plasma display panel supplied by sequences of subfield data bits in form of a codeword comprising a predetermined number of bits are recommended, wherein the apparatus comprises a driver transition energy limitation circuit for toggling bits of the input codeword applied to the driver transition energy limitation circuit and providing a codeword reducing the driver energy consumption. A toggle map, which is generated from a combination of a transition map determining a bit in the input codeword if toggled reduces energy consumption and a flag map determining a number of least significant bits exceeding a cell energy limit value, is applied to an input codeword for the driver to toggle bits of said input codeword for reducing driver energy consumption without a perceivable image quality degradation. Method and apparatus are advantageously applicable for driver overheat protection and eco mode to reduce driver energy consumption without a perceivable image quality degradation.

摘要翻译： 用于降低由输入码字提供的显示装置的驱动器的驾驶员能量消耗的方法和装置，例如， 对于通过包括预定位数的码字形式的子场数据位序列提供的等离子体显示面板的数据驱动器被推荐，其中该装置包括用于切换应用于驱动器的输入代码字的位的驱动器转移能量限制电路 过渡能量限制电路，并提供减少驾驶员能量消耗的码字。 从确定输入码字中的位的转换映射的组合产生的切换映射如果被切换则减少能量消耗，并且将确定超过单元能量限制值的最低有效位的数量的标志映射图应用于输入代码字 用于驱动器切换所述输入码字的位以减少驾驶员能量消耗，而不会有可察觉的图像质量下降。 方法和装置有利地适用于驾驶员过热保护和环保模式以减少驾驶员的能量消耗，而不会有可察觉的图像质量下降。

公开(公告)号：EP2006830A1

公开(公告)日：2008-12-24

申请号：EP08305259.7

申请日：2008-06-13

申请人： THOMSON Licensing

发明人： Thebault, Cedric ,  Correa, Carlos ,  Weitbruch, Sébastien

IPC分类号： G09G3/20

CPC分类号： G09G3/20 ,  G09G3/2029 ,  G09G3/2051 ,  G09G2320/0233 ,  G09G2320/0266

摘要： The invention relates to a method and a device for encoding the video level of a pixel of a picture into a subfield code word in a display device. It can be applied to every display device using a PWM (Pulse Width Modulation) technology and subfields for displaying video picture. The bits of the subfield code word are computed recursively one after the other from the bit having the most significant weight to the bit having the least significant weight. According to the invention, for determining the state of a bit of the subfield code word, a first threshold and a second threshold is associated with said bit, said second threshold being greater than said first threshold, and the video level to be encoded by this bit and its following bits in the subfield code word are compared to the first and second thresholds. If the video level is lower than the first threshold, a state "OFF" is allocated to the bit. If the video level is greater than the second threshold, a state "ON" is allocated to the bit and if the video level is lying between the first and second thresholds, a state "ON" is allocated to the bit according to a predetermined criteria.

摘要翻译： 本发明涉及一种用于将图像的像素的视频电平编码为显示设备中的子域代码字的方法和设备。 它可以应用于每个使用PWM（脉宽调制）技术和显示视频图像子场的显示设备。 子字段代码字的比特从具有最高有效权重的比特一个接一个递归地计算到具有最低有效权重的比特。 根据本发明，为了确定子字段代码字的位的状态，第一阈值和第二阈值与所述位相关联，所述第二阈值大于所述第一阈值，并且由此编码的视频电平 比特及其在子字段码字中的后续比特与第一和第二阈值进行比较。 如果视频电平低于第一阈值，则向该位分配状态“OFF”。 如果视频电平大于第二阈值，则将状态“开启”分配给该位，并且如果视频电平位于第一和第二阈值之间，则根据预定标准将状态“开启”分配给该位 。

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

申请人： Thomson Licensing S.A.

发明人： Weitbruch, S-bastien ,  Zwing, Rainer ,  Correa, Carlos

IPC分类号： G09G3/28

CPC分类号： G09G3/2029 ,  G09G3/2927 ,  G09G2310/0205 ,  G09G2320/0261 ,  G09G2320/0266

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。