Terminology / Interfaces / SDI
SDI
(Serial Digital Interface)
A broadcast-grade interface standard defined by SMPTE for transmitting uncompressed digital video over coaxial cable, typically with BNC connectors as interfaces between equipment.
Variants are distinguished by transmission rate:
HD-SDI (SMPTE 292M)
Transfer rate of 1.485 Gbps; supports 720p and 1080i.
3G-SDI (SMPTE 424M, released 2006)
Transfer rate of 2.97 Gbps; supports 1080p @ 60 Hz.
6G-SDI (SMPTE ST 2081, released 2015)
Transfer rate of 6 Gbps; supports 2160p @ 30 Hz.
12G-SDI (SMPTE ST 2082, released 2015)
Transfer rate of 12 Gbps; supports 2160p @ 60 Hz.