GUIDE TO INSTALLATION AND OPERATION
34
| XVP-3901
The XVP-3901 detects the presence of Namedropper data in the program arriving at its input, and flags it using the
status icon in this panel, which turns green when Namedropper data is detected.
5.4.4.3 Meta / Timecode sub-tab
SD inputs:
In the case of an SD input, the DVITC in the VBI
interval is transcoded into ATC time code packets for the
3G/HD output.
Two types of ATC packets may be produced in 3G/HD:
•
VITC
•
LTC.
VITC type time code is handled by Timecode 1 parameters
whereas Timecode 2 parameters handle LTC type time code
insertion in 3G/HD. It is not possible to automatically detect 2
different lines of timecode. In order to have the possibility to enable and produce LTC type time code make sure to set
the SD Detection Line in Timecode 1 to a specific line number. Doing so will unlock the Timecode 2 parameters.
HD inputs:
all incoming ATC packets (including type LTC) are bypassed to the HD output.
Make sure to enable both
timecode and VBI (in Meta tab) parameters.
The XVP-3901 does not pass LTC type timecode detected within input HD formats 1080p23 / 1080p23sF / 1080p25 /
1080p29. It is not necessary to enable VBI to pass incoming VITC type time code for the aforementioned formats.
Timecode binary group data is guaranteed to be transparent from input to output, except for
1080p23/1080p23sF/1080p25/1080p29 input formats.
Presence
: A presence icon is available for each type of incoming ATC packet. The Timecode 1 Presence icon turns
green when VITC type timecode is detected and the Timecode 2 Presence icon turns green when LTC type timecode
is detected. If the input is SD, then the presence of each icon depends on the selection of the SD Detection Line
parameter.
SD Detection Line
: Select
AUTO
mode to automatically detect the line that contains the timecode. If time code
appears on multiple lines, the first is selected. Select a specific line if desired; this allows a choice to be made when
multiple time code lines are present. There is no AUTO selection available for Timecode 2.
Insertion:
Insertion options are available through a pull-down menu, offering these choices:
AUTO: Time code is inserted if present; insertion is disabled if no time code is present.
OFF:
Time code insertion at the output is disabled.
5.4.5 AFD
tab
The Active Format Descriptor (AFD) flag is used to identify the aspect ratio and protected areas of a video signal. The
XVP-3901 uses this flag in some cases to adjust the output aspect ratio and image cropping to obtain the best
possible presentation of the image. The AFD flag is implemented differently in SD and HD:
•
In HD, the AFD flag (SMPTE 2016) is sent in an ancillary packet, normally found on line 11 in the vertical ancillary
space.
•
In SD, the AFD flag is sent as a VLI signal (RP 186) for 525 and 625 formats, as a WSS signal (ITU-R BT.1119-2)
for PAL only, and as an AFD packet (SMPTE 2016).
Figure 5.18
Video Output 3G/HD - Meta/Timecode
