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The EBU’s Loudness work has become a resounding international success. Many national broadcasters have adopted it and over 70 product manufacturers are offering tools in support of EBU R 128.
This supplement to EBU R 128 specifies a special set of loudness parameters for short-form content. This version 2.0 puts emphasis on the permitted Maximum Short-term loudness and does no longer include the use of the Max. Momentary Loudness limit.
In this document the properties of a loudness meter in the so-called ‘EBU Mode’ are introduced and explained in detail. This version 3.0 includes new minimum requirement test signals, clarifications and a new requirement on LRA stability signalling. This set of test signals complements the document.
The ‘Loudness Range’ (LRA) measure and the algorithm for its computation is introduced and explained in detail. Loudness Range is supplementary to the main audio Programme Loudness described in EBU R 128. This is version 3.0.
The document describes how to change audio levelling from peak normalisation to loudness normalisation in accordance with EBU R 128. This version 3.0 is a completely updated version based on 5 years of experiences in the use of loudness normalization.