Closed Captioning - Cobalt Digital Inc BBG-1040-ACO Product Manual

3
Table 3-2 BBG-1040-ACO Function Menu List — continued
• Closed Captioning Input Status
• Closed Captioning Remove/Regenerate
and HD Insertion Line Controls
• Presence/Absence Check Controls
3-28
BBG-1040-ACO Function Menu List and Descriptions
Provides support for closed captioning setup.Also
provides controls for setting closed captioning absence
and presence detection thresholds.

Closed Captioning

Displays incoming Closed Captioning status as follows:
• If closed captioning is present, a message similar to the example shown
is displayed.
• If no closed captioning is present in the video signal, Not Present or
Disabled is displayed.
Note: • Packet closed captioning status Captioning Rejected Due To
message can appear due to the items described below. The
closed captioning function assesses cdp_identifier,
cdp_frame_rate, ccdata_present, and caption_service_active
items contained in the packet header to make the determinations
listed below. Refer to CEA-708-B for more information.
Message
Unsupported
Frame Rate
Data Not
Present
No Data ID
• caption service is marked as inactive display indicates bit in
packet from upstream source may inadvertently be set as
inactive. In this case, closed captioning data (if present) is still
processed and passed by the device as normal.
• The closed captioning function does not support PAL closed
captioning standards.
Allows removal of closed captioning packets and regeneration of packets.
This is useful where closed captioning must be moved to a different line
than that received on.
Note: • Although the output line drop-down will allow any choice within the
9 thru 41 range, the actual range is automatically clamped (limited
to) certain ranges to prevent inadvertent conflict with active
picture area depending on video format. See Ancillary Data Line
Number Locations and Ranges (p. 3-9) for more information.
• The device does not check for conflicts on a given line number.
Make certain selected line is available and carrying no other data.
Displays CC presence and/or absence event status. This status can be
propagated to the Events Setup tab controls to issue a device GPO or
other command when CC presence/absence events are detected.
Controls for both presence and absence provide for a holdoff time (in
seconds) where, when time is exceeded, an event is to be considered a
valid alert event.
BBG-1040-ACO PRODUCT MANUAL
Description
Film rate closed-captioning (either as
pass-through or up/down conversion) is not
supported by the device.
Packet is marked from closed captioning
source external to the device that no data is
present.
Packet from closed captioning source
external to the device is not properly identified
with 0x9669 as the first word of the header
(unidentified packet).
BBG1040ACO-OM (V1.4)