Cobalt Digital FUSION 3G 9985 3G_HD_SD Loudness Processor - Manual (Page 98)

3
9985 Function Submenu List and Descriptions
3-46 9985 PRODUCT MANUAL 9985-OM (V1.18)
Loudness Processing
Channel Mapping sub-tab provides channel selection
for 5.1 and/or stereo channels to be loudness
processed. Also provides controls for selecting
loudness processing profile preset.
Note: • 5.1-channel loudness processor is described below. Stereo loudness processor has identical controls with omission of
controls other than L and R.
• Loudness processing induces an 8 msec delay into the audio. This delay can be removed by setting either the bulk or
channel Audio/Video Delay controls to introduce a -8 msec advance. See Audio Bus Input Routing/Controls (p. 3-31).
• Loudness Processor Input Channel
Selection
Separate drop-down lists for each loudness processor input channel that
directs any combination of card audio processing channels (listed below)
to each of the loudness processor inputs as shown below.
• Bus Ch1 thru Bus Ch 16 • Upmix L, R, C, LFE, Ls, Rs
• Tone 1 thru Tone 8 • Silence
Note: Set any unused channel inputs to Silence.
• Processing Profile Preset Selection Enables or bypasses loudness processing, and allows selection of preset
loudness profile best suited for the program material and/or model of
processing desired as follows:
• TV 5B General – This is the general, recommended preset for all types
of content. It provides moderate dynamic range compression and is
calibrated to produce audio having an average dialog loudness of
-24 LKFS with no additional output level trim. Use of this preset as an
initial setting is recommended.
• TV 5B Light – Similar to TV 5B General, this preset varies in that
multi-band compression is reduced closer to 2:1, thereby providing a
more gentle action.
Note: This preset sacrifices agility in loudness control in favor of a more
gentle compression profile; this preset may not be suitable for
some material.
• TV 5B Heavy – Similar to TV 5B General, this preset varies in that
multi-band compression is increased for greater level density/adherence
to target at the expense of dynamic range.
• TV 5B Loud – Similar to TV 5B Heavy, but with a louder, more punchy
perception.
• ITU Loud Limit – Utilizes a specially tuned input AGC plus multi-band
and a final limiter to gradually adjust the average program loudness to
an internally set AGC value, with the multi-band and final limiters acting
until the AGC gains control of the level. This preset is most appropriate
for ingest or live program material.
Note: This preset bypasses the multi-band AGC. As such, it has less
ability to manage spectral balance.
• Protection Limit – Bypasses all processing except for final output
limiter, which is set only to prevent overload.
Note: Unless the audio received has already been loudness processed,
this setting is typically not recommended.
• Custom – See next page.
Table 3-2 9985 Function Submenu List — continued
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