The picture and sync must be combined
Analog Sync Generator Signals (2)
Combining Sync with Video
Take a moment and think about how the video system has been described here. The CCDs in the cameras are converting the light images into electrical signals, but the drive, blanking, and sync pulses that tell those CCDs to scan a line, turn down, retrace, turn back up, scan another line, start a new field, and so on are coming from outside the camera. Yet coming out of the camera, the video and sync information are combined. This is called composite video; video information without the sync information is called noncomposite video. So when you look at the waveform monitor, you're looking at composite video.
In a broadcast-quality system, video is ...
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