Ross HDC-8223, User Manual

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HDC-8223 User Manual (Iss. 01) Introduction • 1–5
Audio Overview
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 100Hz to 16 kHz; default
-20dBFS level)
• Downmix L/R
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 3000msec.
Audio Down Mix Function
The Audio Down Mixer function provides a downmix to Left only/Right only ( Lo/Ro ). Any five
embedded channels can be selected for Left ( L ), Right ( R ), Center ( C ), Left Surround ( Ls ), and
Right Surround ( Rs ) individual signal to be down-mixed 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 1.2 .)
Figure 1.2 Audio Down Mix Functional Block Diagram with Example Sources
EMBEDDED CH 3 L
EMBEDDED CH 5 R
EMBEDDED CH 6 C
EMBEDDED CH 9 Ls
EMBEDDED CH 11 Rs
EMBED CH 1 - CH16
DM-L
DM-R