The various RGB (red, green, blue) analog component video standards use no compression and impose no real limit on color depth or resolution.

RGB requires an additional signal for synchronizing the video display. Several methods are used. Composite sync is one such method, where the horizontal and vertical signals are mixed together on a separate wire (the S in RGBS)

Mentioned in:
Video Sync Separator, Sync Stripper, Sync Generator 315 Series