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IntelliGain

 User Manual

 

IntelliGain

 - 10

 

Revision 1.6 

 

 

 

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 

 

 

Содержание IntelliGain

Страница 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...

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

Страница 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 ...

Страница 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...

Страница 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...

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

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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