D950/Vista7 Digital Mixing System
5-200 AutoTouch+ SW V3.3 Date printed: 27.08.03
the string 00:00:00.01 and the string converted to an FOD the result would
be 103, loosing two FODs in the process. During various operations like
bumping or offsetting, the timecode conversion routine keeps track of the
remainder automatically. Basically, having a remainder means that the
FOD does not exactly equal the beginning of the frame represented by the
timecode string. The following table illustrates the rules regarding when
remainders are saved and when they are lost.
Action Remainder
User Enters any Timecode Digits No, FOD exactly matches string entered
User Captures Current Time Yes
Offsets Yes
Bump/Scroll Yes
Drag/Drop Yes
Intellibump: When scrolling or bumping drop frame code to an invalid timecode the
control automatically adjusts to the next valid timecode. For example, if
bumping seconds up two times to achieve a 2 second offset from
00:10:59.00 to 00:11:01.00, the first bump one from will result in
00:11:00.00. This is invalid during drop frame counting so the control
automatically sets it to 00:11:01.00. The second bump would normally
bump 1 second from the previous value, which would yield 00:11:02.00.
This is not what was desired.
The control keeps track of artificial frame bumps required to keep true to
the drop frame counting sequence and automatically re-compensates when
possible. This re-compensation is attempted until the timecode is commit-
ted or some other action besides bumping or scrolling the particular field is
performed. In the above example, the second bump performed would actu-
ally yield 00:11:01.00 since the control would re-compensate for the two
frame bump required to keep the drop frame rules.
CREDITS
Written by: Daniel Pfeifer
Associate Professor of Recording Industry
Middle Tennessee State University
This chapter was written with consultation and direction from Michael
Tapes. Additional editorial input provided by (in alphabetical order): Alex
Duggan, Jamie Dunn, Stephan Ledergerber, Peter Marone, Tibor Tamas,
and Tonstudios Z.
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