说明

• Rear view cameras provide an unobstructed view of the area behind a car. These cameras are often used in automotive applications for driver safety while reversing. When installing rear view cameras, the video source and the video driver are typically ac-coupled to provide dc blocking to the device. The dc level of a video signal represents the black level, which must be constant to suit the video processing circuit. This application note describes a method of restoring the proper dc level of a composite video signal