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公开(公告)号：EP0688132A1
公开(公告)日：1995-12-20
申请号：EP95202352.1
申请日：1990-10-17
申请人： SONY CORPORATION
摘要： Video signal processing apparatus is provided for use with a video camera (13) having a line scanning line period during which useful video information is provided and a flyback period during which an optical black signal level. Replacement black signal information that is a function of the optical black signal level is inserted (17) into a portion of the flyback period. When the camera (13) is of the type having a complementary colour matrix filter which produces odd and even raster scan lines of image pick-up signals with different modulation components, contour correction is provided. Modulation components in a scan line of image pick-up signals caused by the patterns of filter elements included in the matrix are removed (56), thereby producing an averaged scan line of image signals from which is extracted a signal component that is uncorrelated from one line to the next. Prior to such extraction, that portion of an averaged scan line of image signals which exceeds a predetermined level that is less than the lowest average level of a scan line of image signals which would saturate video processing circuitry (67, 69, 70) is clipped (61, 63, 65). The extracted, uncorrelated signal component is combined (73) with an averaged scan line of image signals to produce a contour-emphasized luminance signal.
摘要翻译： 视频信号处理装置被提供用于具有在其中提供有用的视频信息的行扫描行周期的摄像机（13）和在其内的光黑信号电平的回扫周期。 作为光学黑色信号电平的函数的替换黑色信号信息被插入（17）到回扫周期的一部分。 当相机（13）是具有互补色彩矩阵滤波器的类型时，其产生具有不同调制分量的奇摄像扫描线和偶数光栅扫描线的图像拾取信号，提供轮廓校正。 除去由矩阵中包含的滤波器元件的图案引起的图像拾取信号的扫描线中的调制分量（56），从而产生图像信号的平均扫描线，从其中提取与一个不相关的信号分量 行到下一个 在这种提取之前，超过预定水平的图像信号的平均扫描线的那部分小于图像信号的扫描线的最低平均电平，该图像信号将使视频处理电路（67,69,70）饱和 （61,63,65）。 提取的，不相关的信号分量与图像信号的平均扫描线组合（73）以产生轮廓强调的亮度信号。
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