Video camera having a video signal processing apparatus
    23.
    发明授权
    Video camera having a video signal processing apparatus 失效
    具有视频信号处理装置的摄像机

    公开(公告)号:US5221963A

    公开(公告)日:1993-06-22

    申请号:US677140

    申请日:1991-03-29

    IPC分类号: H04N5/20 H04N5/235 H04N5/243

    摘要: A video camera comprising a taking lens, an image taking circuit which generates a video signal by receiving a light having passed through the taking lens, a knee correction circuit which compresses a video signal generated by the image taking circuit and having a level as high as or higher than a predetermined level, a detection circuit which detects a luminance distribution condition of a field, a pedestal adjusting circuit which adjusts a black level of the video signal generated by the image taking circuit and a control circuit which changes a compression method of a video signal in the knee correction circuit and an adjusting method of the black level in the pedestal adjusting circuit according to a luminance distribution condition of a field detected by the detection circuit. According to the present invention, it is possible to perform various controls in response to a luminance condition of a field.

    摘要翻译: 一种摄像机,包括拍摄镜头,通过接收通过拍摄镜头的光产生视频信号的摄像电路,压缩由摄像电路产生的视频信号并具有高达 或高于预定电平的检测电路,检测场的亮度分布状态的检测电路,调整由摄像电路产生的视频信号的黑电平的基座调整电路和改变图像压缩方法的控制电路 根据由检测电路检测出的场的亮度分布条件,对基准调整电路中的黑电平的调整方法进行修正。 根据本发明,可以响应于场的亮度条件执行各种控制。