Component video cables are used for the transmission of component video, often referred to as YUV, YPbPr or YCbCr. The most common component video cables consist of three phono / RCA connectors each end with 75ohm coaxial cable used as the interconnect. Component video cables aren't limited to phono connectors each end, they are also available with a scart plug on one end, BNC connectors on either or both ends etc. One thing all component video leads have in common is they always have three coaxial conductors, one for the Luminance channel Y, one for the Blue colour difference channel (U / Pb / Cb) and one for the Red colour difference channel (V / Pr / Cr). Component video cables only transmit the video signal, separate cables are needed for audio signals.