Cobalt Digital FUSION 3G 9921-FS 3G_HD_SD Frame Sync - Manual (Page 17)

9921-FS-OM (V1.15) 9921-FS PRODUCT MANUAL 1-13
Introduction
9921-FS Functional Description
Closed Captioning Processor
This function provides support for closed captioning setup. When enabled,
the function allows passage of timecode data. The function also allows the
selection of the ancillary data line number where the ancillary closed caption
data is outputted when the output is HD.
Video Output Crosspoint
A four-output video matrix crosspoint allows independently applying the card
video processing paths (
PROGRAM VIDEO , KEY PREVIEW , RECLOCKED ) to
any of the four card discrete coaxial outputs ( SDI OUT A thru SDI OUT D ).
A video D/A converter provides either composite or component analog video
outputs of program video using choices from several formats appropriate for
SD or HD analog video.
Notes: • Rear Module relay bypass is available only between the SDI OUT B and
SDI OUT B ports. This is a passive bypass and does not require card opera-
tion or presence for bypass.
• Output reclocked video can only be obtained from SDI input SDI OUT A .
Audio Subsection Description
Note: Descriptions below include some functions and features that are available
only as options.
(See Figure 1-5.) The 9921-FS audio processing subsection is built around a
card internal 16-channel bus. This 16-channel bus receives inputs from an
input routing crosspoint that routes de-embedded and discrete AES signals
over the 16-channel bus. Correspondingly, at the output end of the 16-channel
bus is an output routing crosspoint that in turn distributes the 16-channel bus
signals to embedded and discrete AES audio outputs.
An Input Audio Status display shows the presence and peak level of each
input audio channel received by the card. For digital audio inputs, payload is
identified (PCM or data such as Dolby
® Digital or E), as well as sample rate
for discrete AES inputs. Discrete AES inputs can have sample rate conversion
applied to align these inputs with the output timing (received sample rates
from 32 kHz to 96 kHz are supported).
An Audio DSP function (which interfaces with the output routing block)
provides eight tone generators and advanced functions such as loudness
processing and upmixing. The routing and Audio DSP functions are described
in detail later in this section.