Closed Captioning - Cobalt Digital Inc BBG-1022-FS Product Manual

Setup/Operating Instructions
Table 3-1 BBG-1022-FS Function Menu List — continued
• Closed Captioning Input Status
• Closed Captioning Remove/Regenerate
and HD Insertion Line Controls
• Presence/Absence Check Controls
BBG1022FS-OM (V1.4)
BBG-1022-FS 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
left is displayed. Also displayed is the VANC line number of the incoming
closed captioning packet (or SD waveform-based VANC line number).
• 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 as normal.
• The closed captioning function does not support PAL closed
captioning standards.
• When receiving HD-SDI, both CEA 608 and CEA 708 are
supported, with CEA 608 and CEA 708 (containing CEA 608
packets) converted to line 21 closed captioning on outputs
down-converted to SD.
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.
• 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 Event Setup Controls tab 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-1022-FS PRODUCT MANUAL
Description
Film rate closed-captioning (either as
pass-through or up/down conversion) is
not supported by the card.
Packet is marked from closed captioning
source external to the card that no data is
present.
Packet from closed captioning source
external to the card is not properly
identified with 0x9669 as the first word of
the header (unidentified packet).
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