HD version of SDI, which is the professional standard for moving uncompressed SD video around a studio.

High Definition Serial Digital Interface. A bit-serial digital interface for HDTV component signals operating at data rates of 1.485 Gb/s and 1.485/1.001 Gb/s. The HDSDI interface is standardized in SMPTE 292M and can be carried over coaxial and fiber optic cables