Io IP Transport, Capture, Display v16.2r1 51 www.aja.com
Timecode Screen
The Timecode Screen selects the timecode stream read for applications that use it
(for example, when the timecode source is set to “Use control panel setting,” AJA
Control Room will read the selected stream). It is also used for monitoring the RP-
188 timecode embedded in the digital data stream, and can be used for selecting
a timecode offset (if required).
Options
Source
In RP-188 timecode (SMPTE 12M-2) there can be multiple timecode types in the
data stream. Use this pull-down to select the one you wish to monitor:
• RP188 LTC (Linear timecode)
• RP188 VITC (Vertical Interval timecode)
• LTC Port
The selection will be displayed in the timecode value to the right of the pull-
down.
NOTE: SMPTE 12M-2 is the updated name and specification for what was RP-188.
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.
