Depending on the quality of the camera, there may be one or multiple CCDs to collect RGB data. Budget consumer cameras usually only have one CCD to process the RGB signal. Higher end cameras may have three or more, one for each Red, Blue and Green signal. Deluxe 1/4 Inch Sharp Chip, 6LED IR Weatherproof, Wired CCD Color Video and Audio Camera, 420TV Lines and 2.8mm Lens, 0.8Lux/F1.2 Minimum Illumination, 1.0Vp-p, 75O Video Output。