AN2014-17 TRACS Loudness logging and monitoring.pdf

TRACS Loudness logging and monitoring option

tracs Loudness logging and monitoring

Loudness Logging and monitoring Introduction

During recording we measure I continuously over the

With the release of version 2.8.0 we introduced the

past hour. During playback the duration of I can be user-

loudness logging and monitoring option according to the

defined to match for instance the length of a program or

ITU-R BS.1770-3, EBU R128, ATSC A/8 or ARIB TR-B32

commercial.

standards. This loudness license will enable monitoring and logging of loudness measurements of all audio

Monitoring the Loudness

channels on TRACS recorders (also existing installations)

The loudness of your audio can easily be monitored in

without additional hardware requirements.

the loudness tab during playback or live play. The measurements are visualized as actual values of M, S

realtime Emsytech Loudness

and I (hourly) and as audio bars. The scale of these

measurements

audio bars is user-definable.

During the realtime encoding process, before audio compression, we measure all relevant audio loudness

The actual values and audio bars in the loudness tab,

levels (up to 8 stereo pairs) driven by the advanced

positioned next to the video player, are completely in

Emsytech HummingbirdÂŽ loudness meters. These

synch with the video and audio that is being played. This

measurements are stored in the MPEG stream, for

makes it possible to determine exactly what content

synchronized loudness monitoring, and in separate

caused loudness peaks.

loudness data files for easy (automated) detection and retrieval.

Loudness history graph The course of the loudness levels during a user defined

The most relevant measurements are: JJ

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period of time can be shown in a loudness history graph.

Momentary (M) loudness measurements (not gated),

This graph not only shows M, S and I (hourly) graphs,

calculated over 400 milliseconds

but also shows a calculated integrated loudness level

Shortterm (S) loudness measurements (not gated),

over a user defined period.

calculated over 3 seconds. Very useful to monitor JJ

Loudness history graph examples course of M, S and I (hourly) during that program, as

SNMP statuses as well as visual statuses in the client.

immediate trends of loudness in the audio

For instance, if you would like to visualize the course of

well as an integrated loudness value calculated over the

The violation level, violation threshold and on which

Integrated (I) loudness measurements, calculated over

the loudness of audio during a certain program, you can

duration of that program. You can even set multiple

measurement (M, S or I hourly) you want to perform the

an indefinite period of time, including any gate

simply set inpoints and outpoints at the beginning and

inpoints and outpoints and view those timelines combined

violation detection on is user definable.

threshold. This is a standardized average value of all

ending of that program and click ‘generate history

in one graph, giving the capability to for instance

audio measurements over an x-amount of time.

graph’. This will generate a graph showing you the

determine I over a program excluding the commercials.

The advantages of the TRACS The graphs are fully interactive. You resize the graph,

loudness feature

change the data aggregate level, change the zoom level, change the shape of the graph line, etc. When the zoom level is lower at a higher aggregate level, the graph becomes thicker where the top line of the graph is the maximum measured level and the bottom line is the

Software option, so upgrading current install-base and future upgrades to a new system are possible without any hardware changes

JJ

JJ

The graph can easily be exported to a .png image, a .pdf

JJ

file or a .csv data file (which you can import in for

User definable violation thresholds

JJ

Loudness monitoring in synch with video and audio

JJ

User definable audio bar scales

JJ

Quick and easy generation of interactive loudness graphs

Loudness alarms Besides monitoring and logging, the TRACS loudness option also makes your compliance recorder function as

2

Very easy to use and to understand, even for laymen

minimum level.

instance Excel).

Playback of recorded content with loudness monitoring

JJ

an integrity checker for your loudness levels. Loudness

Detection and alarming (via e-mail and SNMP) of loudness violations

Determine integrated loudness of a program excluding commercial blocks

JJ

JJ

Export of loudness data to image or data file

violations can be reported by means of e-mails or via

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Disclaimer April 2014 Due to constant product research and development all specifications are subject to change without notice. Axon Digital Design B.V. does not warrant or assume any legal liability or responsibility for the accuracy, completeness, availability and/or delivery of the products and/ or services listed in this catalog. Copyright Š 2014 Axon Digital Design B.V.