Dual Link - The bandwidth of SDI and HD-SDI links allow the transport of uncompressed 4:2:2 sampled video and embedded digital audio. Dual links are often used to carry larger requirements– such as video with key (4:2:2:4), RGB (4:4:4) and RGB with key (4:4:4:4).
See also: 4:2:2, 4:4:4
