A brief introduction to Video & Audio Cables & Connectors
Audio connectors and video connectors are electrical connectors (or optical connectors) for carrying audio signal and video signal, of either analogue or digital format. Analogue A/V connectors often use shielded cables to inhibit radio frequency interference (RFI) and noise.
The existence of many different audio and video standards necessitates the definition of hardware interfaces, which define the physical characteristics of the connections between electrical equipment. This includes the types and numbers of wires required along with the strength and frequency of the signal. It also includes the physical design of the plugs and sockets.An interface may define a connector that is used only by that interface (e.g., DVI) or may define a connector that is also used by another interface; for example, RCA connectors are defined both by the composite video and component video interfaces.
Since both analogue and digital signals are used with some styles of connectors, knowledge of the interface used is necessary for a successful transfer of signals. Some interface types use only a distinctive connector or family of connectors, to ensure compatibility. Especially with analogue interfaces, physically interchangeable connectors may not carry compatible signals.