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Serial Digital Interface (SDI) is a digital video interface that is used for the transmission of uncompressed, unencrypted digital video signals for professional video equipment. Standard SDI cables are terminated with BNC connectors and have a nominal impedance of 75 Ohms. The same cables can also be used for analog SD video distribution.
The SD-SDI signal cables offer a transmission speed up to 360Mb/s and can be used for resolutions up to 480i and 576i.
The HD-SDI signal cables offer a transmission speed up to 1.5 Gb/s and can be used for resolutions up to 720p and 1080i.
The 3G-SDI signal cables offer a transmission speed up to 3.0 Gb/s and can be used for resolutions up to 1080p at 60 frames per second.
| Cable type | Bitrates | Video formats |
|---|---|---|
| SD-SDI | 270 Mbit/s, 360 Mbit/s, 143 Mbit/s, and 177 Mbit/s | 480i, 576i |
| HD-SDI | 1.485 Gbit/s, and 1.485/1.001 Gbit/s | 480p, 576p |
| 3G-SDI | 2.970 Gbit/s, and 2.970/1.001 Gbit/s | 1080p60 |
| 6G-SDI | 6 Gbit/s | 2160p30 |
| 12G-SDI | 12 Gbit/s | 2160p60 |
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