AJA IoXT - Manual (Page 46)

Io XT v10.4 www.aja.com 46
Timecode Input Settings
RP-188 Timecode <n>: In RP-188 timecode (SMPTE 12M-2) there can be multiple timecode values in the data
stream. Use this pull-down to select the one you wish to monitor. The selection will be
displayed in the timecode value displayed to the right of the pull-down.
User Bits: For monitoring variable framerate (VFR) timecode (such as Varicam), you may wish to
monitor the user bits embedded in the timecode. If you set this checkbox, Io XT will
detect and interpret the user bits and display them next to the checkbox.
Figure 40. AJA Control Panel, Timecode Screen
Timecode Output Settings
Use QuickTime Timecode
(Mac OS Only):
This feature is for Final Cut Pro, VTR Exchange, and AJA TV only. When checked, it directs
Io XT to output timecode from the QuickTime timecode track. When not checked, Io XT
uses the Output Timecode Offset value plus the number of frames into the movie.
Timecode Offset (entry field
and FPS pull-down):
This text entry field allows you to specify a timecode offset for use with your editing
application that supports user-controlled timecode offsets. Use that same value here as
the “Output Timecode Offset” to ensure the timecode is synchronized.
Timecode Burn-in: This pulldown selects whether the timecode value is “burned-in” on video output from
Io XT. If set to “OFF”, timecode will not be keyed over the video. If set to “timecode”, then
the timecode value will be keyed over the output video. This can be useful for
synchronizing, choosing edit points, dailies, and many other purposes.
NOTE: SMPTE RP 188 defines a standard for the transmission of time code and control code in the
ancillary data space of a digital television data stream. Time code information is transmitted
in the ancillary data space as defined in ANSI/SMPTE 291M. Multiple codes can be transmitted
within a single digital video data stream. Other time information, such as real time clock,
DTTR tape timer information, and other user-defined information, may also be carried in the
ancillary time code packet instead of time code. The actual information transmitted through
the interface is identified by the coding of a distributed binary bit. Equipment manufacturers
can use the meta data for different purposes.