A high quality HD video interface.

Sony’s HDCAM SR tape format features 4:4:4 color sampling structure which allows better quality for critical color and chroma keying work.

The standard HD SDI does not allow 4:4:4 connectivity. Dual Link is a way of connecting HDCAM SR VTR to NLEs or other post production equipment. As more manufacturers adopt 4:4:4 sampling Dual Link will become a common option.