Lexicon NUVERB - FOR MACINTOSH Manual page 114

Reference
SMPTE Drop Frame Time Code, as its name implies, eliminates frame addresses from the Time
Code each hour to allow matching of Time Code and clock time. Specifically, frame addresses
00 and 01 are eliminated at the end of every minute in an hour, except for minutes 00, 10, 20,
30, 40, and 50. For example, 00:00:59:29 advances to the number 00:01:00:02. In Drop Frame
mode, the frame numbers 00 and 01 do not exist, except for minutes 00, 10, 20, 30, 40, and 50.
Since Drop Frame Time Code eliminates only frame addresses, the actual video is unaffected.
Color videoframes continue to progress at the rate of 29.97 per second. Any calculations of
program length based on Drop Frame Time Code will, therefore, agree with standard clock
time.
Time Code Formats
SMPTE Non-Drop
SMPTE Drop Frame
EBU
Film
108
108
SMPTE Standard Time Code, compatible with a monochromatic
frame rate of 30 frames per second
SMPTE Standard Drop Frame Time Code, compatible with a color
frame rate of 29.97 frames per second
Compatiblewith the European broadcast standard frame rate of 25
frames per second
Compatible with frame rates of 24 frames per second
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