公开(公告)号：US3919471A

公开(公告)日：1975-11-11

申请号：US47523274

申请日：1974-05-31

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： SPIESSBACH ANDREW J ,  PARRISH WILLIAM F ,  KENNEDY PAUL G

IPC: H04N5/217 ,  H04N5/14

CPC classification number: H04N5/217

Abstract: TV camera signals to be presented on a TV monitor are processed to remove undesirable shading components. The circuitry is adaptive in that for each input video signal a low frequency component is extracted to obtain a corrective waveform which is subtracted from that input signal or a subsequent input signal to reduce or eliminate the shading component. Further correction may also be made by utilizing the corrective waveform to govern the amplification of the video signal to be displayed.

Abstract translation: 处理要呈现在电视监视器上的电视摄像机信号，以消除不期望的阴影部件。 电路是自适应的，因为对于每个输入视频信号，提取低频分量以获得从该输入信号或后续输入信号中减去的校正波形，以减少或消除阴影分量。 还可以通过利用校正波形来控制要显示的视频信号的放大来进一步校正。