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.

IntelliGainUser Manual
IntelliGain- iv Revision 1.6
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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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IntelliGain- 2 Revision 1.6
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