Q:

What is an RGB cable used for?

A:

An RGB cable is used in transferring video signals from a video source to a display. This type of cable only carries video signals and consists of three RCA cables that have red, green and blue connection tips. RGB cables are also known as component cables and support standard and HD resolutions up to 1080i. Although it does support HD up to 1080i, RGB is still an analog application.

RGB cables are capable of carrying various signals, such as 480i, 480p, 576i, 576p, 720p and 1080i. It uses three colors (red, blue and green) and blends them together with horizontal and vertical sync information to project a complete video image. The green or Y wire carries the luma data, which controls achromatic (colorless) brightness. The Blue or Pb cable is used to carry the blue chroma signal while the red or Pr cable carries the red chroma. Common uses for an RGB cable include connecting DVD players, PC video cards and video cameras to a television, HDTV or computer monitor. However, RGB standard is slowly falling out of favor as computers obtain better clarity using DisplayPort or Digital Visual Interface (DVI) digital connections, while home theater systems increasingly favor High-Definition Multimedia Interface (HDMI).


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