evertz IntelliGain User manual

IntelliGain
User Manual
© Copyright 2009 - 2013
EVERTZ MICROSYSTEMS LTD.
5288 John Lucas Drive,
Burlington, Ontario,
Canada L7L 5Z9
Phone: [phone]
Sales: [email protected] Fax: [phone]
Tech Support: [email protected] Fax: [phone]
Web Page: http://www.evertz.com
Version 1.6, June 2013
The material contained in this manual consists of information that is the property of Evertz Microsystems and is
intended solely for the use of purchasers of IntelliGain. Evertz Microsystems expressly prohibits the use of this
manual for any purpose other than the operation of IntelliGain.
All rights reserved. No part of this publication may be reproduced without the express written permission of Evertz
Microsystems Ltd. Copies of this manual can be ordered from your Evertz dealer or from Evertz Microsystems.

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IntelliGainUser Manual
Revision 1.6 IntelliGain- i
TABLE OF CONTENTS
1. OVERVIEW .......................................................................................................................................1
2. TOP LEVEL INTELLIGAINCONFIGURATION..............................................................................2
2.1. SETTING THE PROGRAM CONFIGURATION SOURCE ........................................................4
2.2. SETTING THE LEVELER ATTACK MODE...............................................................................5
2.3. SETTING THE LEVELER RELEASE MODE............................................................................6
2.4. SETTING THE COMPANDER ATTACK TIME..........................................................................6
2.5. SETTING THE COMPANDER RELEASE TIME........................................................................6
2.6. INPUT LOUDNESS MODE.......................................................................................................6
2.7. LOUDNESS AUTO REFRESH..................................................................................................6
2.8. SETTING THE AUDIO SOURCE CHANNELS..........................................................................6
3. INTELLIGAINCONFIGURATION BY AUDIO PROGRAM.............................................................7
3.1. PROGRAM CONFIGURATION CONTROL ..............................................................................9
3.1.1. Setting the IntelliGainState........................................................................................9
3.1.2. Setting the Leveler State ...............................................................................................9
3.1.3. Setting the Target Loudness..........................................................................................9
3.1.4. Setting the Maximum Gain.............................................................................................9
3.1.5. Setting the Noise Floor Threshold (If Available).............................................................9
3.1.6. Setting the Hold Time (If Available) .............................................................................10
3.1.7. Setting the Compander State (If Available)..................................................................10
3.1.8. Setting the Compander Profile (If Available)................................................................11
3.1.9. Setting the Makeup Gain (If Available).........................................................................12
3.1.10. Setting the Peak Limit..................................................................................................12
3.2. INTELLIGAIN LOUDNESS MONITORING.............................................................................12
3.2.1. Monitoring the Input Loudness.....................................................................................12
3.2.2. Monitoring the Gain Applied.........................................................................................13
3.2.3. Monitoring the Output Loudness..................................................................................13
3.2.4. Monitoring the Integrated Loudness.............................................................................13
3.2.5. Monitoring the Maximum Loudness .............................................................................13
3.2.6. Monitoring the Loudness Range..................................................................................14
3.2.7. Monitoring the Loudness Range Low...........................................................................14
3.2.8. Monitoring the Loudness Range High..........................................................................14
3.2.9. Reset...........................................................................................................................14
3.2.10. Start/Continue..............................................................................................................14

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3.2.11. Stop/Pause..................................................................................................................14
3.3. SETTING THE OUTPUT LEVEL THRESHOLD (1, 2, 3).........................................................15
3.4. SETTING THE FAULT DURATION.........................................................................................15
3.5. SETTING THE CLEAR DURATION........................................................................................15
4. INTELLIGAINFAULT TRAPS......................................................................................................16
Figures
Figure 2-1: IntelliGainConfiguration Screen (7800IDA8-3G+IG Shown)...........................................................3
Figure 3-1: Program 1 Configuration View............................................................................................................8
Figure 3-2: IntelliGain Loudness Monitoring View...............................................................................................12
Tables
Table 2-1: IntelliGainConfiguration Options ......................................................................................................2
Table 2-2: Abbreviations........................................................................................................................................4
Table 2-3: Relationship between Audio Programs and Audio Channels...............................................................5
Table 3-1: Relationship between Program Configuration Mode and Audio Programs..........................................7
Table 4-1: IntelliGainFault Traps.....................................................................................................................16

IntelliGainUser Manual
Revision 1.6 IntelliGain- iii
REVISION HISTORY
REVISION DESCRIPTION DATE
1.0 First Release Nov 2007
1.1 Updated VistaLINK®screenshots to reflect new controls (Hold Time, July 2009
Audio Source Select).
1.2 Added “Noise Floor Threshold” parameter Oct 2009
1.2.1 Updated features Oct 2010
1.3 Changed dBFS references to LKFS, added recommended defaults Dec 2010
1.3.1 Updated product features Jan 2011
1.4 Updated VLPRO sections Dec 2012
1.5 Updated “Relationship between Audio Programs and Audio Channels” table Feb 2013
1.6 Updates throughout June 2013
Information contained in this manual is believed to be accurate and reliable. However, Evertz assumes no responsibility for the use thereof nor for
the rights of third parties, which may be affected in any way by the use thereof. Any representations in this document concerning performance of
Evertz products are for informational use only and are not warranties of future performance, either expressed or implied. The only warranty
offered by Evertz in relation to this product is the Evertz standard limited warranty, stated in the sales contract or order confirmation form.
Although every attempt has been made to accurately describe the features, installation and operation of this product in this manual, no warranty
is granted nor liability assumed in relation to any errors or omissions unless specifically undertaken in the Evertz sales contract or order
confirmation. Information contained in this manual is periodically updated and changes will be incorporated into subsequent editions. If you
encounter an error, please notify Evertz Customer Service department. Evertz reserves the right, without notice or liability, to make changes in
equipment design or specifications.

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IntelliGainUser Manual
Revision 1.6 IntelliGain- 1
1. OVERVIEW
IntelliGainis a technology developed by Evertz to control the loudness of audio programs on the fly.
More specifically, it calculates the perceived loudness of the input audio and modifies the audio to ensure
that the long-term average loudness level is at the target level. IntelliGainworks with mono, stereo and
multi-channel audio per program and can handle up to 16 programs simultaneously. The objective
loudness calculation is based on ITU Recommendation (ITU-R BS.1770), “Algorithms to measure audio
program loudness and true-peak audio level”. This recommendation provides equations for calculating
loudness over mono, stereo and multi-channel audio programs. IntelliGainconstantly calculates audio
program loudness. When the loudness is over the target level, it reduces the gain; and when the loudness
is below the target level, it increases the gain. The gain adjustment smoothness is user-controllable by
setting attack and release times.
Features:
•Normalize loudness of audio programs to a target level
•Supports up to 16 programs and 16 channels
•Relatively constant gain within a program interval to preserve audio dynamic range
•Simultaneously process multiple multi-channel programs
•User adjustable attack and release times
•Applied loudness algorithm ITU-R BS. 1770
•Peak limiting
•LKFS calculations
•Momentary, short term and integrated loudness measurements

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2. TOP LEVEL INTELLIGAINCONFIGURATION
The IntelliGainConfiguration tab displays the top-level IntelliGaincontrol interface. There are a
number of parameters that control both the Intelligent leveler and the on-board dynamic processor
(compressor, expander, limiter).
Recommended default settings are underlined.
Table 2-1 provides a brief overview of the top level of the IntelliGainConfiguration menu tree. The
details of each of the menu items are described in sections 2.1 to 2.8.
Program Configuration Source Defines how the audio channels are grouped together.
Leveler Attack Mode Defines the maximum integration time that is applied when
loudness increases during a program period.
Leveler Release Mode Defines the maximum integration time that is applied when
loudness decreases during a program period.
Compander Attack Time Defines how quickly the compander reacts to an increase in
the input loudness.
Compander Release Time Defines how quickly the compander reacts to a decrease in
the input loudness.
Audio Source Select Defines the audio channels that will be fed into the program
audio channels.
Table 2-1: IntelliGainConfiguration Options

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Revision 1.6 IntelliGain- 3
Figure 2-1 shows the IntelliGainConfiguration view from the VistaLINK®NMS.
Figure 2-1: IntelliGainConfiguration Screen (7800IDA8-3G+IG Shown)
Sections 2.1 to 2.8 provide detailed explanations for each control available in the IntelliGain
Configuration Source tab.

Please Note: Some older implementations will have slightly different controls.

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2.1. SETTING THE PROGRAM CONFIGURATION SOURCE
IntelliGain 1 Configuration
This parameter defines how the audio channels are
grouped together.
Up to eight channels can be grouped
together in individual programs, where each program
contains its own metadata. IntelliGainuses this
parameter to configure multiple internal settings.
This control must be set to define the audio program
provided as the input to IntelliGain.
For simplicity only IntelliGain 1 Configuration is shown.
Note: It is important to follow the program to channel
mapping guidelines, which are provided in Table 2-3. For
example, Program Configuration Source 2 + 2 + 2 + 2
defines audio program 1 mapped to AES 1, audio program
2 mapped to AES 4, audio program 3 mapped to AES 2
and audio program 4 mapped to AES 3. Program
Configuration Source 2 + 2 + 2 + 2 (p1, p2, p3, p4) has the
audio program mapped sequentially.
Program Configuration Source
5.1+2
5.1 + 1 + 1
4 + 4
4 + 2 + 2
4 + 2 + 1 + 1
4 + 1 + 1 + 1 + 1
2 + 2 + 2 + 2
2 + 2 + 2 + 1 + 1
2 + 2 + 1 + 1 + 1 + 1
2 + 1 + 1 + 1 + 1 + 1
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1
5.1
4 + 2
4 + 1 + 1
2 + 2 + 2
2 + 2 + 1 + 1
2 + 1 + 1 + 1 + 1
1 + 1 + 1 + 1 + 1 + 1
4
2 + 2
2 + 1 + 1
1 + 1 + 1 + 1
7.1
7.1 Screen
2 + 5.1
1 + 1 + 5.1
2 + 2 + 2 + 2 (p1, p2, p3, p4)
2 + 2 + 2 + 1 + 1 (p1, p2, p3, p4, p5)
2 + 2 + 2 (p1, p2, p3)
Table 2-3 provides a list of programs to channel mapping guidelines. For example, configuration 5.1+2,
program 1 (P1) is mapped to channel CH1 to CH6 and program 2 (P2) is mapped to channel CH7 to CH8.
Table 2-2 provides a list of abbreviations used:
Abbreviations
Description
P
Program
CH
Channel
L
Left or left front
R
Right or right front
C
Center or mono
LFE
Low frequency effect
Ls
Left surround
Rs
Right surround
Bsl
Back surround left
Bsr
Back surround right
Table 2-2: Abbreviations

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Program Configuration
CH 1
CH 2
CH 3
CH 4
CH 5
CH 6
CH 7
CH 8
5.1+2
P1-L
P1-R
P1-C
P1-LFE
P1-Ls
P1-Rs
P2-L
P2-R
5.1 + 1 + 1
P1-L
P1-R
P1-C
P1-LFE
P1-Ls
P1-Rs
P2-C
P3-C
4 + 4
P1-L
P1-R
P1-C
P1-S
P2-C
P2-S
P2-L
P2-R
4 + 2 + 2
P1-L
P1-R
P1-C
P1-S
P3-L
P3-R
P2-L
P2-R
4 + 2 + 1 + 1
P1-L
P1-R
P1-C
P1-S
P3-C
P4-C
P2-L
P2-R
4 + 1 + 1 + 1 + 1
P1-L
P1-R
P1-C
P1-S
P4-C
P5-C
P2-C
P3-C
2 + 2 + 2 + 2
P1-L
P1-R
P3-L
P3-R
P4-L
P4-R
P2-L
P2-R
2 + 2 + 2 + 1 + 1
P1-L
P1-R
P3-L
P3-R
P4-C
P5-C
P2-L
P2-R
2 + 2 + 1 + 1 + 1 + 1
P1-L
P1-R
P3-C
P4-C
P5-C
P6-C
P2-L
P2-R
2 + 1 + 1 + 1 + 1 + 1
P1-L
P1-R
P4-C
P5-C
P6-C
P7-C
P2-C
P3-C
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1
P1-C
P2-C
P3-C
P4-C
P5-C
P6-C
P7-C
P8-C
5.1
P1-L
P1-R
P1-C
P1-LFE
P1-Ls
P1-Rs
None
None
4 + 2
P1-L
P1-R
P1-C
P1-S
None
None
P2-L
P2-R
4 + 1 + 1
P1-L
P1-R
P1-C
P1-S
None
None
P2-C
P3-C
2 + 2 + 2
P1-L
P1-R
P3-L
P3-R
None
None
P2-L
P2-R
2 + 2 + 1 + 1
P1-L
P1-R
P3-C
P4-C
None
None
P2-L
P2-R
2 + 1 + 1 + 1 + 1
P1-L
P1-R
P4-C
P5-C
None
None
P2-C
P3-C
1 + 1 + 1 + 1 + 1 + 1
P1-C
P2-C
P3-C
P4-C
P5-C
P6-C
None
None
4
P1-L
P1-R
P1-C
P1-S
None
None
None
None
2 + 2
P1-L
P1-R
None
None
None
None
P2-L
P2-R
2 + 1 + 1
P1-L
P1-R
None
None
None
None
P2-C
P3-C
1 + 1 + 1 + 1
P1-C
P2-C
P3-C
P4-C
None
None
None
None
7.1
P1-L
P1-R
P1-C
P1-LFE
P1-Ls
P1-Rs
P1-Bsl
P1-Bsr
7.1 Screen
P1-L
P1-R
P1-C
P1-LFE
P1-Ls
P1-Rs
P1-Le
P1-Re
2 + 5.1
P1-L
P1-R
P2-L
P2-R
P2-C
P2-LFE
P2-Ls
P2-Rs
1 + 1 + 5.1
P1-C
P2-C
P3-L
P3-R
P3-C
P3-LFE
P3-Ls
P3-Rs
2 + 2 + 2 + 2 (p1, p2, p3, p4)
P1-L
P1-R
P2-L
P2-R
P3-L
P3-R
P4-L
P4-R
2 + 2 + 2 + 1 + 1 (p1, p2, p3,
p4, p5)
P1-L
P1-R
P2-L
P2-R
P3-L
P3-R
P4-C
P5-C
2 + 2 + 2 (p1, p2, p3)
P1-L
P1-R
P2-L
P2-R
P3-L
P3-R
None
None
Table 2-3: Relationship between Audio Programs and Audio Channels
2.2. SETTING THE LEVELER ATTACK MODE
IntelliGain Configuration
The Leveler Attack Mode defines the maximum integration
time that is applied when loudness increases during a
program period.
The actual integration time is content dependent. For more
responsive results set the attack mode to a smaller value.
Leveler Attack Mode
1
2
3
4
…
12

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2.3. SETTING THE LEVELER RELEASE MODE
IntelliGain Configuration
The Leveler Release Mode defines the maximum
integration time that is applied when loudness decreases
during a program period.
The actual integration time is content dependent. For more
responsive results set the release mode to a smaller value.
Leveler Release Mode
1
2
3
4
5
6
7
…
12
2.4. SETTING THE COMPANDER ATTACK TIME
IntelliGain Configuration
The Compander Attack Time control defines how quickly
the compander reacts to an increase in the input loudness.
Compander Attack Time
10ms to 2000ms (2 seconds)
2.5. SETTING THE COMPANDER RELEASE TIME
IntelliGain Configuration
The Compander Release Time control defines how quickly
the compander reacts to a decrease in the input loudness.
The compander release time should be larger than or equal
to the Compander Attack Time.
Compander Release Time
10ms to 2000ms (2 seconds)
2.6. INPUT LOUDNESS MODE
IntelliGain Configuration
The Input Loudness Mode control defines the window that
will be used to produce the Input Loudness values in
section 3.2.1.
AMomentary
selection defines a moving window of 400 ms.
A Short Term selection defines a moving window of 3 s.
Input Loudness Mode
Momentary
Short Term
2.7. LOUDNESS AUTO REFRESH
IntelliGain Configuration
The Loudness Auto Refresh control allows the Input
Loudness, Applied Gain and Output Loudness
values in
section 3.2 to refresh without enabling the
Auto Refresh
Mode in VistaLINK®.
Loudness Auto Refresh
Off
On
2.8. SETTING THE AUDIO SOURCE CHANNELS
IntelliGain Configuration
This control sets the channel mappings for the audio
program configuration. This audio configuration then feeds
the program configuration
sources. For simplicity only
Channel 1 is shown.
Audio Source Select
Intelligain Source Select Channel 1
Channel 1 - 16

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3. INTELLIGAINCONFIGURATION BY AUDIO PROGRAM
IntelliGaincan individually process up to eight audio programs independently. An audio program defines
how the audio is grouped together.
For example, a 5.1+2 program configuration mode is defined to have 2 audio programs. The first audio
program is 5.1 and the second is 2.
Table 3-1 outlines the relationship between the program configuration mode and the number of audio
programs.
Program Configuration Number of Programs
5.1 + 2
2
5.1 + 1 + 1
3
4 + 4
2
4 + 2 + 2
3
4 + 2 + 1 + 1
4
4 + 1 + 1 + 1 + 1
5
2 + 2 + 2 + 2
4
2 + 2 + 2 + 1 + 1
5
2 + 2 + 1 + 1 + 1 + 1
6
2 + 1 + 1 + 1 + 1 + 1
6
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1
8
4
1
2 + 2
2
2 + 1 + 1
3
1 + 1 + 1 + 1
4
7.1
1
7.1 Screen
1
2 + 5.1
2
1 + 1 + 5.1
3
2 + 2 + 2 + 2 (p1, p2, p3, p4)
4
2 + 2 + 2 + 1 + 1 (p1, p2, p3, p4, p5)
5
2 + 2 + 2 (p1, p2, p3)
3
Table 3-1: Relationship between Program Configuration Mode and Audio Programs
The internal IntelliGainengine will analyze the value of the selected Program Config Source.This value
will determine how many Program VistaLINK®tabs are to be accessible.
For example, if a program configuration source of 5.1 + 2 is selected, then 2 program configuration tabs
will be user accessible. However, if a program configuration source of 1 + 1 + 1 + 1 is selected then 4
program configuration tabs will be accessible.

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Figure 3-1 identifies up to eight program configuration tabs that are accessible via the VistaLINK®NMS.
Figure 3-1: Program 1 Configuration View

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Revision 1.6 IntelliGain- 9
3.1. PROGRAM CONFIGURATION CONTROL
Once IntelliGainis configured for the desired audio programs, the VistaLINK®program configuration
tabs will become activated. The user interface and program configuration tabs are identical.
Sections 3.1.1 to 3.1.10 provide detailed explanations for each control available in the Program
Configuration tab. Since each program configuration interface is identical, only Program 1 will be
described.
3.1.1. Setting the IntelliGainState
Program 1
The IntelliGain State control is the master switch for the IntelliGain
processor, which is used for the given audio program. Set this control
to Enable to initiate IntelliGainprocessing.
IntelliGain State
Enable
Disable
3.1.2. Setting the Leveler State
Program 1
The Leveler State control is used to activate the IntelliGainaudio
leveler. The leveler is used to level each individual audio channel to
the target loudness level. Set this control to Enable to activate the
IntelliGainaudio leveler.
Leveler State
Enable
Disable
3.1.3. Setting the Target Loudness
Program 1
The Target Loudness control is used to set the target loudness level
for the given audio program. The IntelliGainprocessor will level the
audio to this value.
Note that if the compander is enabled, it is
desirable to set the target loudness parameter to the range (–31 LKFS
to –26 LKFS) and use Makeup Gain control to reach the final desired
target loudness level.
Target Loudness
–35 LKFS to –15LKFS
-24 LKFS (ATSC)
-23 LKFS (EBU)
3.1.4. Setting the Maximum Gain
Program 1
The Maximum Gain control is the total amount of gain that the
IntelliGainengine will apply. For example, setting this control to 10
LKFS indicates that IntelliGainis not to add anymore than 10 LKFS
of gain to the audio program, even if the audio program requires more
gain to reach the target loudness level.
Maximum Gain
0 to 40 LKFS
15
3.1.5. Setting the Noise Floor Threshold (If Available)
Program 1
The Noise Floor Threshold control is used to set the threshold level for
IntelliGainprocessing. Levels below
this value will not have
IntelliGainprocessing applied.
Noise Floor Threshold
–70 LKFS to –40 LKFS
-60

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3.1.6. Setting the Hold Time (If Available)
Program 1
The Hold Time control is used to set the hold time for the given audio
program. The IntelliGainprocessor will wait this period of time to
add gain once the level goes below the target loudness. The adaptive
setting will vary the hold time depending on the content for optimal
sound quality.
Hold Time
Immediate
1 second – 14 seconds
Adaptive

Please Note: Hold Time has been removed and will always be set to Adaptive.
3.1.7. Setting the Compander State (If Available)
Program 1
The Compander State control is used to activate the on-board
compressor/expander, otherwise known as the compander. The use of
the compander allows audio signals with a large dynamic range to be
transmitted over facilities that have a smaller dynamic range capability.
The compander works by compressing or expanding the dynamic
range of the audio signal.
Compander State
Enable
Disable

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3.1.8. Setting the Compander Profile (If Available)
Program 1
The Compander Profile control is used to define the dynamic range
control of the compander. There are 5 default profiles and 3 custom
profiles.
The Film Standard profile is used to compress/expand sporting events,
and movies with a large dynamic range.
Max Boost: 6 dB (below –43 dB)
Boost Range: –43 to –31 dB (2:1 ratio)
Null Band Width: 5 dB (–31 to –26 dB)
Early Cut Range: –26 to –16 dB (2:1 ratio)
Cut Range: –16 to +4 dB (20:1 ratio)
The Film Light
profile is used to compress/expand light movies or
program content such as dramas or content with less dynamic range.
Max Boost: 6 dB (below –53 dB)
Boost Range: –53 to –41 dB (2:1 ratio)
Null Band Width: 20 dB (–41 to –21 dB)
Early Cut Range: –26 to –11 dB (2:1 ratio)
Cut Range: –11 to +4 dB (20:1 ratio)
The Speech profile is used to compress/expand content such as news,
documentaries or “talking head” type content.
Max Boost: 15 dB (below –50 dB)
Boost Range: –50 to –31 dB (5:1 ratio)
Null Band Width: 5 dB (–31 to –26 dB)
Early Cut Range: –26 to –16 dB (2:1 ratio)
Cut Range: –16 to +4 dB (20:1 ratio)
The Music Standard profile is used in most typical music environments
such as concerts, music videos and music content with a wide dynamic
range.
Max Boost: 12 dB (below –55 dB)
Boost Range: –55 to –31 dB (2:1 ratio)
Null Band Width: 5 dB (–31 to –26 dB)
Early Cut Range: –26 to –16 dB (2:1 ratio)
Cut Range: –16 to +4 dB (20:1 ratio)
The Music Light profile is used to compress/expand music content with
a narrow dynamic range.
Max Boost: 12 dB (below –65 dB)
Boost Range: –65 to –41 dB (2:1 ratio)
Null Band Width: 20 dB (–41 to –21 dB)
Cut Range: –21 to +9 dB (2:1 ratio).
There are 3 custom compander profiles that are currently not available
for use. These profiles may be enabled in a future release.
Compander Profile
Film Standard
Film Light
Speech
Music Standard
Music Light
Custom 1
Custom 2
Custom 3

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3.1.9. Setting the Makeup Gain (If Available)
Program 1
The Makeup Gain control is used to add additional gain to the audio
program. This control would be used if the final desired target loudness
has not been reached.
Makeup Gain
0 to 20 dB
3.1.10. Setting the Peak Limit
Program 1
The Peak Limit control is used within the audio program chain to
provide an upper limit to peak program levels. Sometimes referred to
as a “brick-wall” limiter. This control is used to maintain the upper limit
of the peak levels.
Peak Limit
-15 to –1 LKFS
3.2. INTELLIGAIN LOUDNESS MONITORING
Figure 3-2: IntelliGain Loudness Monitoring View
3.2.1. Monitoring the Input Loudness
Program 1
The Input Loudness control will provide a real time value of the
calculated input loudness value. This control is used fo
r monitoring
purposes only.
Input Loudness
Read Only Monitor

IntelliGainUser Manual
Revision 1.6 IntelliGain- 13
3.2.2. Monitoring the Gain Applied
Program 1
The Gain Applied control will provide a real time value indicating the
amount of gain being applied by the IntelliGainsystem. Values can
be either negative, indicating a gain reduction, or positive, indicating
gain is being applied.
Gain Applied
Read Only Monitor
3.2.3. Monitoring the Output Loudness
Program 1
The Output Loudness control will provide a real time value of the
calculated output loudness value. This control is used for monitoring
purposes only. It is used to provide confidence monitoring.
Output Loudness
Read Only Monitor
3.2.4. Monitoring the Integrated Loudness
Program 1
The Integrated Loudness control will provide a real time value of the
calculated integrated loudness value. This control is used for
monitoring purposes only.
The period of the integrated loudness measurement is defined by the
Start/Continue and Stop/Pause buttons defined in sections 3.2.10 and
3.2.11. Once the Stop/Pause button is activated, the loudness of the
segment(s) defined by all active periods is calculated.
The integrated loudness measurement is performed using the gating
function specified in ITU-R BS.1770-2 summarized as follows:
- an absolute gating threshold at -70 LKFS is used to compute
the absolute-gated loudness level
- a relative gating threshold that is 10 LU below the absolute-
gated loudness level is applied
- the measurement input to which the gating threshold is applied
is the loudness of 400 ms blocks with a constant overlap
between consecutive gating blocks of 75%
Integrated Loudness
Read Only Monitor
3.2.5. Monitoring the Maximum Loudness
Program 1
The Maximum Loudness control will provide a real time value of the
calculated maximum loudness value within the duration of the
Integrated Loudness calculation. This control is used for monitoring
purposes only.
Maximum Loudness
Read Only Monitor

IntelliGainUser Manual
IntelliGain- 14 Revision 1.6
3.2.6. Monitoring the Loudness Range
Program 1
The Loudness Range control will provide a real time value of the
calculated loudness range value within the duration of the Integrated
Loudness calculation. This control is used for monitoring purposes
only.
The Loudness Range describes the distribution of loudness within a
program and is defined as the difference between the highest and
lowest loudness values within the Integrated Loudness
period. This
range excludes all loudness values in the top 5% and bottom 10% of
the loudness distribution after applying a relative gating threshold of 20
LU below the absolute-gated loudness level.
Loudness Range
Read Only Monitor
3.2.7. Monitoring the Loudness Range Low
Program 1
The Loudness Range Low control will provide a real time value of the
lowest calculated loudness value within the duration of the Integrated
Loudness
calculation, given the exclusions and thresholds used as
described in the calculation of the Loudness Range in section 3.2.6.
This control is used for monitoring purposes only.
Loudness Range Low
Read Only Monitor
3.2.8. Monitoring the Loudness Range High
Program 1
The Loudness Range High control will provide a real time value of the
highest calculated loudness value within the duration of the Integrated
Loudness
calculation, given the exclusions and thresholds used as
described in the calculation of the Loudness Range in section 3.2.6.
This control is used for monitoring purposes only.
Loudness Range High
Read Only Monitor
3.2.9. Reset
Program 1
The Reset control will flush the buffer for the Integrated Loudness
calculation.
This control should be activated each time a new Integrated Loudness
value is to be obtained.
Reset
3.2.10. Start/Continue
Program 1
The Start/Continue control will commence or resume the duration in
which loudness values are being used to calculate the Integrated
Loudness measurement.
Start/Continue
3.2.11. Stop/Pause
Program 1
The Stop/Pause control will terminate or pause the duration in which
loudness values are being used to calculate the Integrated Loudness
measurement. Each time this button is activated, a new Integrated
Loudness value will be produced.
Stop/Pause