公开(公告)号：US07126643B2

公开(公告)日：2006-10-24

申请号：US10743633

申请日：2003-12-22

申请人： Suk-beom Song ,  Yong-in Han ,  Chang-won Huh ,  Hyen-aee Woo

发明人： Suk-beom Song ,  Yong-in Han ,  Chang-won Huh ,  Hyen-aee Woo

IPC分类号： H04N7/01

CPC分类号： H04N7/012 ,  H04N5/142 ,  H04N7/0142

摘要： Provided is a progressive scan method used in a display using adaptive edge interpolation. According to the progressive scan method, a final edge direction that satisfies a first edge-determination condition and a second edge-determination condition is detected by performing interpolation for 7×3 pixel windows, using code determination and a comparison of a standard deviation based on differences between luminances of pixel data divided by an edge boundary. As a result, directional edge interpolation is carried out in a region of a low gradient below 45° and to 27° at the minimum, and simple intra-field linear interpolation can be performed in a high-frequency texture region. Subsequently, it is possible to remove high-frequency noise introduced in edge dependent interpolation or unnatural screen display due to zigzagged edges, thereby improving the quality of a display.

摘要翻译： 提供了一种使用自适应边缘插值的显示中使用的逐行扫描方法。 根据逐行扫描方法，通过对7×3像素窗进行插值来检测满足第一边缘确定条件和第二边缘确定条件的最终边缘方向，使用代码确定和基于基于 像素数据的亮度除以边缘边界。 结果，方向边缘内插是在低至45°和最低27°的低梯度的区域中进行的，并且可以在高频纹理区域中执行简单的场内线性插值。 随后，可以消除由于锯齿形边缘引起的边缘相关内插或不自然屏幕显示引入的高频噪声，从而提高显示质量。

公开(公告)号：US07102695B2

公开(公告)日：2006-09-05

申请号：US10440679

申请日：2003-05-19

申请人： Yong-In Han ,  Chang-Yeong Kim ,  Seong-Deok Lee ,  Chang-Won Huh ,  Seok-Joon Park

发明人： Yong-In Han ,  Chang-Yeong Kim ,  Seong-Deok Lee ,  Chang-Won Huh ,  Seok-Joon Park

IPC分类号： H04N5/52 ,  H04N5/57 ,  H04N9/64 ,  G09G5/00 ,  G09G5/02 ,  G09G5/10

CPC分类号： H04N5/57 ,  H04N9/68 ,  H04N21/4318 ,  H04N21/44008

摘要： A method and apparatus for selectively enhancing contrast depending on the level of incoming video signals while preserving colors are provided. An apparatus for enhancing the contrast and brightness of a video signal displayed on a display device includes: a first luminance level transformation circuit that receives luminance and chrominance signals, reduces the level of the luminance signal in response to a first control signal, and outputs the chrominance signals and the luminance signal whose level has been reduced; an image converting circuit that receives the output signals from the first luminance level transformation circuit and converts the received signals into RGB video signals; and a second luminance level transformation circuit that receives the RGB video signals from the image converting circuit, concurrently increases the respective levels of the RGB video signals in response to a second control signal, and outputs the RGB video signals whose levels have been increased. It is desirable that the display device is a color display tube (“CDT”), a thin film transistor liquid crystal display (“TFT-LCD”), or a plasma display panel (“PDP”).

摘要翻译： 提供了一种用于在保留颜色的同时根据输入视频信号的电平有选择地增强对比度的方法和装置。 一种用于增强显示装置上显示的视频信号的对比度和亮度的装置，包括：接收亮度和色度信号的第一亮度级变换电路，响应于第一控制信号降低亮度信号的电平，并输出 色度信号和电平降低的亮度信号; 图像转换电路，接收来自第一亮度级变换电路的输出信号，并将接收的信号转换为RGB视频信号; 以及从图像转换电路接收RGB视频信号的第二亮度电平变换电路，响应于第二控制信号同时增加RGB视频信号的各个电平，并输出其电平已经增加的RGB视频信号。 期望显示装置是彩色显像管（“CDT”），薄膜晶体管液晶显示器（“TFT-LCD”）或等离子体显示面板（“PDP”）。