Composite RCA Cable: The Three Colour Connectors
Three connectors in a row, and decades of equipment built around them. Understanding what each carries explains most AV connection problems on legacy gear.
Quick Answer
| Connector | Colour | Carries |
|---|---|---|
| Composite video | Yellow | All video information combined |
| Audio left | White or black | Left channel, line level |
| Audio right | Red | Right channel, line level |
| Component video | Green, blue, red | Three separate video signals, better quality |
Composite is the lowest quality analogue video format. It carries everything in one signal, which limits detail and colour accuracy.
Common Confusions
Component and composite are different
The red of component video is not the red of audio. Plugging into the wrong socket produces no picture or a strange colour cast.
Audio cables can carry composite video
Mechanically identical, and short runs work fine. Dedicated video cable has better shielding for longer runs.
The connectors are RCA, the signal is composite
RCA describes the connector. Composite describes the video signal it carries.
Conversion needs a chip
Composite to HDMI requires an active converter, not a passive cable.
Practical Use
- Match colours at both ends.
- Keep the cable reasonably short.
- Check the television input is set to AV or composite.
- If converting, use a powered composite to HDMI converter.
- Test audio and video separately to isolate faults.
Real-World Applications
- Older consoles and set top boxes.
- Camcorders and VCRs.
- Legacy CCTV equipment.
- Retro gaming on modern displays through a converter.
Related Guides
For conversion, read AVI to HDMI converter. For the connector family, see RCA output. For audio pairs, start with RCA to 3.5mm.
FAQ
Can I use audio RCA cables for composite video?
Yes for short runs. The connectors are the same and the signal is line level.
Why is my picture black and white?
Usually a regional colour standard mismatch or a failing cable.
Is component better than composite?
Yes. Component separates the video information across three connectors.
Does composite carry audio?
No. Audio travels on the separate white and red connectors.