PC Interfaces 101

Cinch RCA (Composite, Audio, HDTV Components)

Color coding example from a typical set-top box: yellow for composite video (FBAS), a pair of white and red jacks for analog stereo, and a trio of jacks in red/blue/green for HDTV components

These are used with coaxial cables for many types of electronic signals. The connectors are easily differentiated through the use of color, as follows:

Color Use Signal Type
white or black Audio left channel analog
red Audio right channel, also see HDTV analog
yellow Video Composite analog
green HDTV Components Y Luminance with sync-on-green analog
blue HDTV Components Cb/Pb Chroma analog
red HDTV Components Cr/Pr Chroma analog
orange/yellow Audio SPDIF digital
Warning: It's possible to mix up audio SPDIF with composite video connectors, so please always consult your handbook for their proper connection and use. Use of color for SPDIF isn't always consistent, either. Furthermore, it's possible to switch the red HDTV connector with the right audio channel. HDTV components always appear in groups of three on device panels, so be sure to match them up with three-element cables and connectors.

RCA connectors in various colors for different types of signals

Two types of SPDIF (Digital audito): an RCA/coax connector on the left, and a TOSLINK (optical fiber) on the rigth

TOSKLINK connector for optical delivery using fiber optic cable for digital SPDIF signals

An adapter from SCART to RCA connectors (Composite-Video, 2x audio, and S-Video)


  • RCA = Radio Corporation of America
  • SPDIF = Sony/Philips Digital Interfaces
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  • Anonymous
    All of the captions are attached to the wrong pictures.

    *PLEASE* leave a few blank lines between.