38
SDI and HD-SDI interfaces
This chapter describes digital interfaces for uncompressed and compressed SD and HD. Tables 38.1 and Tables 38.2 summarize video signal levels.
Composite 4f SC digital interfaces are obsolete. For details about them, consult the first edition of this book.
Table 38.1. Analog video levels in several interfaces are summarized.
| Interface | Ref black | Ref white |
| Abstract signal, mathematical | 0 | 1 |
| Abstract signal, units (“IRE”) | 0 | 100 |
| Analog NTSC [mV] | 53 4/7 | 714 2/7 |
| Analog NTSC-J [mV] | 0 | 714 2/7 |
| Analog PAL [mV] | 0 | 700 |
| Analog VGA [mV], zero setup | 0 | 700 |
| 7.5-percent setup | 53 4/7 | 714 2/7 |
Table 38.2. Digital video levels in several interfaces are summarized.
a True reference black in digital cinema cannot be conveyed across ...
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