SDI (Serial Digital Interface)
Professional broadcast-grade video interface using BNC coaxial connectors.
Versions
- SD-SDI: 270 Mbps (480i/576i)
- HD-SDI (3G): 2.97 Gbps (1080p60)
- 6G-SDI: 6 Gbps (4K@30)
- 12G-SDI: 12 Gbps (4K@60)
Max Cable Length
- HD-SDI: up to 100m (Belden 1694A)
- 12G-SDI: up to 50-70m
- Fiber SDI: km+ distances
Common Uses in AV
- Broadcast studios and production
- Large venue IMAG (image magnification)
- Camera feeds in corporate broadcast rooms
Key Considerations
- No HDCP — broadcast world uses different content protection
- Extremely reliable, locking BNC connectors
- Embedded audio (up to 16 channels)
- Always use broadcast-grade 75Ω coax (Belden 1694A or equivalent)