Actus Loudness monitoring

Throughout the world, growing numbers of consumers have voiced their concerns in the past few years about variations in loudness, especially in commercials loudness, advertising loudness, resulting in national legislative activities (FCC CALM Act) that have begun to regulate broadcasters more closely.

Actus Loudness brings broadcasters a complete visibility of the loudness levels of all programs as well as a comparison to the average loudness levels of ads.


Loudness Compliance integration 

The ability to completely monitor Loudness Compliance is now fully integrated into Actus Loudness module. Broadcasters can avoid costly legislative penalties and better handle viewer complaints with this fully compliant feature. Actus Loudness is a multi-layer solution that offers centralized broadcast performance operational information in real time.

The Actus Loudness module lets operators maintain continuous measurements, which among other things, identifies program loudness and loudness range. Loudness measurements combined with robust logging allow users to quickly review the status and provide continuous, exportable measurements as proof of compliance and to defend against loudness complaints.

Only by providing complete information, like the Actus Loudness Meter does, including not only the ‘Program Loudness’ (‘I’) but also the ‘Program Range’ and the ‘Program True Peak’, can the sound engineer select the right mix of methods, and make sure that the program is within the EBU\CALM Act specifications without compromising its sound quality.

The powerful combination of loudness measurement and logging easily demonstrates compliance with loudness standards.

Actus Loudness Feature Highlights

  • Follows FCC Loudness monitoring recommendations
  • Offers measurement to the ITU recommendation BS.1770-1 and BS.1770-2 standard
  • Provides compliance with US CALM Act, ATSC A/85 Practice, EBU R128 3341 PLOUD

Key Features

Record and Retrieve

Actus Loudness offers an on-screen display during the playback of the following values:

  1. M (LUFS) – The momentary measurement
  2. S (LUFS) – The short term measurement
  3. I (LUFS) – The integrated average of S over the whole segment. (This is the program Loudness level itself) And it is supposed to be under -23 LUFS.
  4. True Peak – Presents the statistical highest levels reached
  5. Range – This is the statistical average between the highest and the lowest levels.

The user can select to show or hide the value next to the video.

broadcast loudness compliance monitoring

The system constantly saves an Excel Spreadsheet which presents during the whole duration of the segment all the measurements of the parameters described above, and even more raw data.Excel Spreadsheet

Export with Burn-In Loudness Data

Quick Export provides you with an easy and quick way to export and share your content with the Regulator, or any other party. You can export media to various destinations simultaneously with the Loudness Data burned-in, as affidavit of the program Loudness value.

Actus View – Quick Export Screen with Loudness Burn-In Selected

Actus Loudness Specifications

Supported Input Methods

  • IP Transport Stream, Analog, Digital (SDI),
  • DVB-T/T2, ASI
  • Both SD and HD inputs are fully supported

Available Bitrates

  • Video: 256 Kbps – 20 Mbps (Full HD)
  • Audio: 64 Kbps – 1024 Kbps


Loudness Meter – any device, or software solution, that has the capability to measure the audio levels of a program.

Program Loudness – is the average Loudness Measurement over the length of a given programme.

Loudness Range – is the average dynamic range (the number of db separating the low volume from that of the high volume) of a given programme.

Maximum True Peak Level – is the approximate level of the highest volume of audio within a given programme.

Graphical Representation – Any Loudness Meter may implement a different graphical solution. There are no standards in terms of GUI.

Time Scales – the EBU specifications require that a Loudness Meter provides measurements in 3 time scales. The shortest time scale is called ‘momentary’, abbreviated ‘M’ using a rectangular time window of duration 400ms, non-gated. The intermediate time scale is called ‘short-term’, abbreviated ‘S’ using a sliding time window of duration 3s, non-gated updated at least at 10Hz. The programme- or segment-wise time scale is called ‘integrated’, abbreviated ‘I’ updated at least at 1Hz.

Gated – When applicable, a gate, or a filter, will be used, to eliminate all measurements which are below a certain level, for example anything lower than -70LUFS (dB) can be ignored. However, a Gate is not used in ‘M’ and ‘S’ measurements. It is applicable to the ‘I’ measurement.

Scales – An ‘EBU Mode’ meter shall offer two scales, for when a scale is shown, selectable by the user: range -18.0 LU to +9.0 LU (-41.0 LKFS to -14.0 LKFS), named ‘EBU +9 scale’ or range -36.0 LU to +18.0 LU (-59.0 LKFS to -5.0 LKFS), named ‘EBU +18 scale’

Live Meter – In an ‘EBU Mode’ ‘live meter’ all three time scales shall be available, but not necessarily displayed at the same time.

Non Live Meter – Is used for example in the case of a file-based software meter, which measures average loudness of a given programme, in compliance with the ‘EBU Mode’ requirements.

Maximum Loudness – The loudness meter shall be able to display the maximum value of the ‘momentary loudness’. This maximum value is reset when the integrated loudness measurement is reset.

ITU 1770 – This is the standard that defines the measurement methods used. The complete name of the standard is ITU-R BS.1770-2.