CSI Digital xCoder, User Manual

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Output Audio AGC : Optional CALM Act compliance settings. Dynamically adjusts the audio level to be
CALM act compliant.
By default, the audio level control (ALC) is disabled for each channel. To enable and choose a parameter
for a channel configuration, a control element is located on the output tab of the channel configuration.
(see next page).
The “Output Audio AGC” parameter will be operational for all audio programs within a channel.
Parameter Controls:
A variety audio level settings can be selected. A drop down list (shown here) allows selection.
The setting options are:
Disabled => no limiting
TV_5B_GEN : This is the recommended setting that provides moderate degree of dynamic range
processing and works with a wide variety of content.
TV_5B_LIGHT: similar to the GEN setting, but has a slower transition on sharp loudness changes.
TV_5B_HEAVY: Stronger reduction to loudness changes but results in less dynamic sound.
TV_5B_Loud : Strongest loudness suppression.
IT_LOUD_LIMIT : this provides a slow adjustment to the program loudness. This is useful for live
applications where the program loudness may be changing slowly.
Protect Limit : This provides a simple limiter function to protect against overload.
Primary, Secondary and Third Audio Programs: Up to 3 audio programs per channel are supported.
Each audio program can be enabled/disabled. When enabled, each audio program has a separate
bitrate, volume control, and audio lip synch offset control.
Output audio bitrate: Select the desired output bitrate. Higher bit rates result in high audio quality. Up
to 3 audio programs are supported per video program in this release. Each audio program bit rate can be
controlled independently.