Audio connectors and video connectors are electrical connectors for carrying audio signal and video signal, of either analog or digital format. Analog A/V connectors often use Shielded cable to inhibit radio

RCA connectors are commonly used for home stereo and video equipment.

Color codes

white RCA/TS	analogue audio, left channel; also mono (RCA/TS), stereo (TRS only), or undefined/other
black RCA/TS/TRS
grey RCA/TS/TRS
red RCA/TS	analogue audio, right channel
orange RCA	SPDIF digital audio

For computers:

green TRS 3.5mm	stereo output, front channels
black TRS 3.5mm	stereo output, rear channels
grey TRS 3.5mm	stereo output, side channels
gold TRS 3.5mm	dual output, center and subwoofer
blue TRS 3.5mm	stereo input, line level
pink TS 3.5mm	mono microphone input

There are exceptions to the above:

• Hosa cables use grey and orange for left and right analogue channels.
• RadioShack cables sometimes use grey and black for left and right.
• Older sound cards had non-standard colour codes until after PC99, prior to that there were no colours at all.

Video connectors carry only video signals. Common video-only connectors include:

• Component video aka YPbPr (3 RCA or BNC; or D-Terminal)
• Composite video (1 RCA, Antenna socket, or BNC)
• DB13W3 ("13W3" computer video connector)
• DMS-59, single connector carrying two DVI and two VGA
• Musa, British connector used in broadcasting and telecommunications
• PAL connector, common in Europe as an antenna connector
• S-Video (1 Mini-DIN)
• SDI - Broadcast grade digital interface over BNC cables
• VGA connector A type of D-sub connector standard on most video cards
• Mini-VGA Found on some laptop computers
• 5 BNC Connectors can also be used to carry the VGA signal as R, G, B, HSync, VSync
• Digital Visual Interface (DVI) A hybrid analog/digital connector commonly found on PC graphics cards and LCD monitors
• Mini-DVI Found on some Apple laptops
• Enhanced Graphics Adapter (EGA)
• RGBI interface
• RGB interface
  
  

  A VGA connector

  Colour codes

  yellow RCA/BNC	composite video
  red RCA/BNC	red or Pr/Cr chrominance
  green RCA/BNC	green or luminance
  blue RCA/BNC	blue or Pb/Cb chrominance
  white BNC	horizontal sync
  black BNC	vertical sync

  Newer connectors are identified by their shape and not their colour.
  

From Wikipedia, the free encyclopedia : Wholesale of audio and video equipment