Io XT/4K Capture, Display, Convert v14.0 42 www.aja.com
Figure 14. AJA Control Panel, Timecode Screen
Timecode Output Settings
Use QuickTime Timecode (Mac OS Only)
This feature is for Final Cut Pro 7 (or earlier), VTR Exchange, and AJA TV only. When
checked, it directs Io XT/4K to output timecode from the QuickTime timecode
track.
Timecode Burn-in
This pulldown selects whether the timecode value is displayed in a “burned-
in” window in video output. 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 for all of the Io XT/4K outputs. This can be useful for synchronizing,
choosing edit points, dailies, and many other purposes.
Timecode Offset
When QuickTime timecode in disabled, this text entry field allows you to
generate a timecode based on the offset entry. You can select a framerate from
the pulldown menu at the right side of the pane. Use that same value here as the
source video to ensure the timecode is synchronized.
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.