Cobalt Digital OBSIDIAN 3G 9501-DCDA-3G Downconverter - Manual (Page 13)

9501DCDA-OM (V1.3) 9501-DCDA PRODUCT MANUAL 1-9
Introduction
9501-DCDA Functional Description
Audio Processor Description
The audio processor operates as an internal audio router. This function
chooses from the following inputs:
• 16 channels of embedded audio from the SDI video input (1-to-1
routing to SDI output)
• 16 discrete tone generators (with ascending frequencies of 100 Hz to
16 kHz; default -20 dBFS level)
• Downmix L/R
• (Option +LTC ) Audio LTC
The router function provides the following audio outputs:
• 16 channels of embedded audio on SDI processed outputs
• 4 channels of balanced analog audio on four 3-wire balanced analog
audio outputs
Output audio crosspoints allow any of these sources to be routed to any of the
16 embedded output channels or the four analog audio outputs. Each output
channel has a mute control and phase invert control. Peak-responding
DashBoard™ bar graph level meters are also provided.
The processor function provides group enable/disable and de-embedding of
the 16-channel embedded audio SDI input. A bulk delay control allows lip
sync correction by offsetting the audio from video by up to 3000 msec.
Audio Down Mix Function
(See Figure 1-3.) The Audio Down Mixer function provides for the selection
of any five embedded channels serving as Left (
L ), Right ( R ), Center ( C ), Left
Surround ( Ls ), and Right Surround ( Rs ) individual signals to be multiplexed
into stereo pair Down Mix Left ( DM-L ) and Down Mix Right ( DM-R ). The
resulting stereo pair DM-L and DM-R can in turn be routed to any embedded
audio pair as desired (or de-embedded to an analog audio output).
Figure 1-3 Audio Down Mix Functional Block Diagram with Example Sources
DM-L
L
R
C
Ls
Rs
DM-R
Emb Ch 3
Emb Ch 5
Emb Ch 6
Emb Ch 9
Emb Ch 11
Embed Ch 1 - Ch 16