838 Chapter 28
hours above 23, no minutes or seconds above 59, and no frames above 24 (in PAL), the
time code possesses potential redundancy. In fact, some of these extra codes are exploited
in other ways. The basic time address data, and these extra bits are assigned their position
in the full 80-bit time code word, are like this:
0–3 Frame units
4–7 First binary group
8–9 Frame tens
10 Drop frame fl ag
11 Color frame fl ag
12–15 Second binary group
16–19 Seconds units
20–23 Third binary group
24–26 Seconds tensFrame
unitsFrame
tensSecond
unitsSecond
tensMinute
unitsMinute
tensHour
unitsHour
tensSync
wordUser
bitsLTCVITCVideo01:37:25:14Figure 28.16 : Format of LTC and VITC time code.