AU Information Ctrl
Off, AU Info. Controls the insertion of private data in the adaptation unit of the
audio access units (AU). AU Info is defined in ETSI TR 101 154. Only AU_PTS
is present for audio.
Passthrough
Channel Mode
Bit Depth
Channel Identification
Encapsulation
MPEG 2 ADTS, MPEG4 LATM/LOAS. Specifies the encapsulation used for
transmitting AAC content. It can be either MPEG-2 Audio Data Transport
Stream or MPEG-4 Low Overhead Audio Stream based on MPEG-4 Low
Overhead Audio Transport Multiplex.
TNS (Temporal Noise Shaping) Off, On. Turns noise shaping on or off.
PNS (Perceptual Noise Substitution)
SBR Signalling Explicit, Implicit. Specifies how Spectral Band Replication is signaled.
Automatic Loudness Control
Operating Mode Off, Measure, Measure + ALC, Measure + ALC + LTLC.
Target Level -40 to 0 (LKFS (LU). The desired Loudness level for the channel.
Time Period
5 to 120 minutes. This controls the responsiveness of the long term audio
loudness level correction.
A smaller number will result in the audio being adjusted more dynamically. A
larger value will give a slower less noticeable adjustment.
Peak Limit
-20 to 0 dBFS. This controls a hard clipping limiter for the audio level. This
adjustment is based on the absolute peak level measured in dBFS.
The peak limiter only operates in ‘Measure + ALC’ and ‘Measure + ALC +
LTLC’ modes.
If this value is set to 0 no limiting is performed
Maximum Boost
0 to 10 dB. This control determines the maximum amount of gain that the LTLC
algorithm can apply. This is to prevent over adjustment which can lead to
unwanted audio artifacts. This only applies when the operating mode is
“Measure + ALC + LTLC”.
Maximum Attenuation
0 to 10 dB. This control determines the maximum amount of attenuation that
the ALC and the LTLC algorithm can apply. This is to prevent over adjustment
which can lead to unwanted audio artefacts.
Preset
Subtle, Standard, Strong. The available options are Subtle, Standard and
Strong. This setting controls the aggressiveness of the corrections performed
by the Short Term ALC algorithm. It controls how quickly the correction takes
place and the strength of the correction.
Reset Statistics
True, false. This can be used to reset the statistics that have been collected in
the Audio Algorithm. Due to the slower update nature of the web interface the
apparent change would be to the measurement of the Integrated Loudness
only.
Advanced
Lip Sync Offset
-500 to 500 ms. Configures a delay to the audio to improve A/V
synchronization.
Gain -6 to 6dB. Sets the gain in dB for the audio stream.
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