公开(公告)号：EP2362674A1

公开(公告)日：2011-08-31

申请号：EP10305172.8

申请日：2010-02-23

申请人： Thomson Licensing

发明人： Mueller, Stefan ,  Weitbruch, Sébastien ,  Robert, Arnaud

IPC分类号： H04N17/00

CPC分类号： H04N17/004

摘要： A method for evaluating video quality of a video stream comprising the steps of
a) calculating, for at least a first frame of a series of frames from said video stream, a true value of at least one video quality-related parameter associated to said first frame;
b) calculating a predicted value of said video quality-related parameter for at least a second frame from said series of frames based on said true value associated to said first frame;
c) calculating a true value of said video quality-related parameter associated to said second frame; and
d) judging the video quality of said second frame based on a difference between true and predicted values of the at least one video quality-related parameter associated to said second frame.

摘要翻译： 一种用于评估视频流的视频质量的方法，包括以下步骤：a）对于来自所述视频流的一系列帧的至少第一帧，计算与所述第一视频流相关联的至少一个视频质量相关参数的真实值 帧; b）基于与所述第一帧相关联的所述真实值，从所述一系列帧计算至少第二帧的所述视频质量相关参数的预测值; c）计算与所述第二帧相关联的所述视频质量相关参数的真实值; 以及d）基于与所述第二帧相关联的所述至少一个视频质量相关参数的真实值和预测值之间的差异来判断所述第二帧的视频质量。

公开(公告)号：EP2200008A1

公开(公告)日：2010-06-23

申请号：EP08305960.0

申请日：2008-12-17

申请人： Thomson Licensing

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

IPC分类号： G09G3/20 ,  G09G3/32

CPC分类号： G09G3/2081 ,  G09G3/2022 ,  G09G3/3225 ,  G09G2320/0261 ,  G09G2360/02

摘要： An addressing method for sample and hold displays suitable for multi-scan applications (supporting several frame rates) shall be provided. Thus, there is disclosed a method for displaying a picture on a display screen including the steps of providing an input signal including a sequence of plural frames, each corresponding to a single picture, temporally dividing each frame having a frame duration into sub-fields and controlling a display element of the display screen on the basis of the sub-fields. The number and/or duration of sub-fields of each frame is automatically adapted to the frame duration of the frame. Furthermore, the amplitude of a sub-field controlling signal corresponding to the last sub-field of each frame may be automatically adapted to the frame duration of the frame. Such display methods provide for a high grayscale quality and linearity even if the frame rate is not stable nor well-defined.

摘要翻译： 应提供适用于多扫描应用（支持几帧速率）的采样和保持显示的寻址方法。 因此，公开了一种在显示屏幕上显示图像的方法，包括以下步骤：提供包括多个帧序列的输入信号，每个帧对应于单个图像，将具有帧持续时间的每个帧时间划分为子场， 基于子场来控制显示屏的显示元件。 每帧的子场的数量和/或持续时间自动适应帧的帧持续时间。 此外，对应于每帧的最后一个子场的子场控制信号的幅度可以自动适应帧的帧持续时间。 这样的显示方法即使帧速率不稳定也没有明确定义，提供了高灰度质量和线性度。

公开(公告)号：EP1768088A3

公开(公告)日：2009-05-13

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.

公开(公告)号：EP2015562A1

公开(公告)日：2009-01-14

申请号：EP07301218.9

申请日：2007-07-10

申请人： THOMSON Licensing S.A.

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

IPC分类号： H04N5/217 ,  H04N9/04 ,  H04N9/09

CPC分类号： H04N5/3675 ,  H04N5/374 ,  H04N9/045 ,  H04N9/09 ,  H04N2209/049

摘要： CMOS image sensors are usually suffering from fixed pattern noise and random defect pixels.
A processing device (15) for correcting of at least one defect pixel value of an image sensor unit is proposed, the image sensor unit comprising at least a first and a second pixel array (1,2,3), wherein the image sensor unit is embodied to project the same image onto each pixel array (1,2,3), the processing device (15) comprising at least a first and a second input channel (11,12,13) for receiving pixel values of the first and the second pixel array, respectively, wherein the processing device (15) is operable to exchange the defect pixel value by a corrected pixel value, wherein the corrected pixel value is estimated by evaluating the values of neighbouring pixels of the defect pixel of the same pixel array,
wherein the corrected pixel value is estimated by evaluating values of a corresponding pixel and its neighbouring pixels of the second pixel array at the same location as the defect pixel of the first pixel array in respect to the projected image.

摘要翻译： CMOS图像传感器一般由固定模式噪声和随机缺陷像素的痛苦。 用于图像传感器单元的至少一个缺陷像素值的校正的处理装置（15）提出的，图像传感器单元，包括至少一个第一和一个第二pixelarray（1,2,3），worin图像传感器单元 被实施为投影到每一个像素阵列（1,2,3），该处理装置（15）相同的图像，其包括至少一个第一和一个第二输入信道（11,12,13），用于接收第一像素值和 第二像素阵列，分别worin上述处理装置（15）可操作用于通过校正像素值，worin校正像素值通过计算同一像素的缺陷像素的相邻像素的值来估计交换缺陷像素值 阵列，worin校正像素值通过计算像素值和其在相对于所述投影图像在相同的位置作为所述第一像素阵列的缺陷像素对应第二像素阵列的相邻像素估计。

公开(公告)号：EP1887549A2

公开(公告)日：2008-02-13

申请号：EP07111202.3

申请日：2007-06-27

申请人： Thomson Licensing

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

IPC分类号： G09G3/32

CPC分类号： G09G3/3225 ,  G09G2300/0842 ,  G09G2300/0866 ,  G09G2310/066 ,  G09G2320/0261 ,  G09G2320/0626

摘要： The sharpness impression when displaying a movement on an AMOLED (Active Matrix Organic Light Emitting Display) shall be improved. For this purpose, an apparatus for driving a cell of an AMOLED is provided including driving means (14, 16) for applying a driving voltage to the cell and for applying a luminance control signal to the cell during a pregiven time frame. The apparatus further includes controlling means (17, 18) for varying the driving voltage within the time frame according to a predefined function of time. For example, the driving voltage may be varied in the form of a triangle so that the lighting time over the frame is reduced while a CRT like behavior is emulated.

摘要翻译： 在AMOLED（有源矩阵有机发光显示器）上显示运动时的清晰度印象应得到改善。 为此，提供了一种用于驱动AMOLED的单元的设备，其包括驱动装置（14,16），用于向单元施加驱动电压并且在预设时间帧期间向单元施加亮度控制信号。 该设备还包括控制装置（17,18），用于根据预定的时间函数在该时间范围内改变驱动电压。 例如，驱动电压可以以三角形的形式变化，从而减少帧上的照明时间，同时仿真CRT类似行为。

公开(公告)号：EP1615200A3

公开(公告)日：2007-12-19

申请号：EP05105568.9

申请日：2005-06-22

申请人： Thomson Licensing

发明人： Weitbruch, Sébastien ,  Thébault, Cédric ,  Schweer, Rainer

IPC分类号： G09G3/20 ,  G09G3/28

CPC分类号： G09G3/293 ,  G09G3/20 ,  G09G3/2022 ,  G09G5/18 ,  G09G2310/02 ,  G09G2330/06

摘要： The EMI spectrum of a display device is to comply with respective norms. Therefore, the clock for loading data into data drivers of a display panel is designed to be variable. Consequently, the electromagnetic radiation produced by the loading clock is broadened thereby reducing the peak amplitude. Thus, the limitations of radiation norms can be complied with.

公开(公告)号：EP1821277A2

公开(公告)日：2007-08-22

申请号：EP07102607.4

申请日：2007-02-19

申请人： Thomson Licensing

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

IPC分类号： G09G3/28

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

摘要： The picture quality on a plasma display panel shall be improved when the contrast and/or the brightness are reduced. This is achieved by estimating the reduction of the dynamic occurring in the front-end (2) of the data processing of the plasma display device and by compensating it in the back-end (3). Specifically, the gain and/or offset of the video input data are adjusted (5) and the power level of the adjusted video data is measured (10). The resulting power level information is updated (13) on the basis of an attenuation information (12). The updated power level is used for the power management (9) and the level of the video data being reduced (5) in the front-end (2) is increased (14) on the basis of the attenuation information. Thus, the dynamic of the video and, as a result, the picture quality are improved.

摘要翻译： 当对比度和/或亮度降低等离子显示面板上的图像质量将被提高。 这是通过估计所述动态中的等离子体显示装置的数据处理的前端（2）上发生的还原并通过在后端（3）补偿它来实现的。 具体地，增益和/或视频输入数据的偏移量被调整（5）和所述调整的视频数据的功率电平进行测量（10）。 将所得的功率电平信息被更新（13）的衰减信息（12）的基础上。 更新的功率电平被用于电源管理（9）和所述视频数据的电平在前端（2）被还原（5）增加（14）的衰减信息的基础上。 因此，视频的动态，并且作为结果，图像质量得到改善。

公开(公告)号：EP1758073A1

公开(公告)日：2007-02-28

申请号：EP06118358.8

申请日：2006-08-03

申请人： Thomson Licensing

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

IPC分类号： G09G3/20 ,  H04N1/405

CPC分类号： G09G3/2044 ,  G09G3/2048 ,  G09G3/2062 ,  G09G3/2077 ,  G09G3/28 ,  H04N1/4052

摘要： The invention relates to a method for processing video data to be displayed on a display device having a plurality of luminous elements corresponding to the pixels of a video picture, wherein an error diffusion step is applied to at least a part of said video data to refine the grey scale portrayal of said video picture, said error diffusion step comprising, for each current pixel of said part of video picture, a step of truncating the value of the corresponding video data and a step of diffusing the truncation error to at least one neighboring pixel. According to the invention, a noise is inserted on the error before and/or after its diffusion to the neighbouring cells. Owing to this principle no static pattern should be visible, improving the overall picture quality.

摘要翻译： 本发明涉及一种用于处理要显示在具有与视频图像的像素对应的多个发光元件的显示装置上的视频数据的方法，其中误差扩散步骤被应用于所述视频数据的至少一部分以细化 所述视频图像的灰度描绘，所述误差扩散步骤包括对于所述视频图像的所述部分的每个当前像素，截断相应视频数据的值的步骤以及将截断误差扩散到至少一个相邻 像素。 根据本发明，在其扩散到相邻单元之前和/或之后，在该误差上插入噪声。 由于这个原理，不应该看到静态图案，改善整体图像质量。

公开(公告)号：EP1359564A3

公开(公告)日：2004-10-13

申请号：EP03290986.3

申请日：2003-04-22

申请人： Thomson Licensing S.A.

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

摘要： In the field of video displaying the low video levels do not generate large area flicker. For displaying video sources with higher frame rate, it is therefore the idea of the invention, to extract from two corresponding pixels of two successive video frames a common portion (V x ) that will be displayed at a sub-frequency f v /2 while the individual portions (V 1 ',V 2 ') of the corresponding pixels video are displayed at the correct high frequency f v . The time period for displaying two frames is divided into three sub-groups. Two groups of sub-fields with similar sizes, for displaying the individual portions (V 1 ',V 2 ') and one group of sub-fields, called extra-codes, for displaying the common portion (V x ). This enables to eliminate large area flicker artifacts from PDPs, when displaying 50Hz based video norms by using upconverted 100Hz video sequences and to display real high frequency video on the PDP (ca. up to 120Hz) without frame dropping.

公开(公告)号：EP1391867A1

公开(公告)日：2004-02-25

申请号：EP03292006.8

申请日：2003-08-11

申请人： Thomson Licensing S.A.

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

摘要： In many cases it is not possible to reproduce enough video levels on a PDP due to timing issues or a specific solution against the false contour effect. In such cases dithering is used to render all required levels. In order to reduce the visibility of the dithering noise there is performed a common change of the sub-field organization together with a modification of the input video data through an appropriate transformation curve based on the human visual system luminance sensitivity (Weber-Fechner law).

摘要翻译： 在许多情况下，由于定时问题或针对假轮廓效应的特定解决方案，不可能在PDP上再现足够的视频级别。 在这种情况下，抖动用于渲染所有必需的级别。 为了降低抖动噪声的可视性，通过基于人类视觉系统亮度灵敏度（Weber-Fechner定律）的适当变换曲线，进行子场组织的共同改变以及输入视频数据的修改， 。