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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

Summary of Contents for IntelliGain

Page 1: ... 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 Microsys...

Page 2: ...This page left intentionally blank ...

Page 3: ...ler 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 ...

Page 4: ...es 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 In...

Page 5: ...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 bee...

Page 6: ...IntelliGain User Manual IntelliGain iv Revision 1 6 This page left intentionally blank ...

Page 7: ...his 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 ...

Page 8: ... 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 ...

Page 9: ...tion 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 ...

Page 10: ...ed 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...

Page 11: ...e 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 ...

Page 12: ...se 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 A Momentary selection defines a moving window of 400 ms A Short Term selection defines a moving window of 3 s I...

Page 13: ... 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 Conf...

Page 14: ...IntelliGain User Manual IntelliGain 8 Revision 1 6 Figure 3 1 identifies up to eight program configuration tabs that are accessible via the VistaLINK NMS Figure 3 1 Program 1 Configuration View ...

Page 15: ... 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 us...

Page 16: ...l 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...

Page 17: ...ech 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 dy...

Page 18: ... 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 pro...

Page 19: ... 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 thresho...

Page 20: ...he 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 cal...

Page 21: ... LKFS to 1 LKFS 3 4 SETTING THE FAULT DURATION Program 1 The Fault Duration control defines the amount of time that the IntelliGain system detects the output level has been exceeded For example if this control is set to 25 seconds this means that the output level has to be exceeded for a minimum of 25 seconds before an SNMP trap alarm is sent to VistaLINK Fault Duration 0 5 to 240 seconds 3 5 SETT...

Page 22: ...ck or un check the defined control The system also provides real time trap status information If a trap is sent by the IntelliGain system the trap status box will change state indicating the real time value for that trap For example if the trap status box is the colour green then the trap has not been sent However if the status box is the colour red then the fault is in a current state of alarm On...

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