Loudness normalisation of Cinematic Content

EBU R 128 S4

This Supplement to R 128 gives guidance on how to potentially adapt and normalise highly dynamic content with speech as a main component.

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Whilst this is found in original Cinematic Content such as movies, drama productions or TV series used for broadcasting and streaming, the guidance given is explicitly not intended as production advice for feature films.

After the introduction of recommendation R 128, the EBU has studied its practical adoption and its consequences. Cinematic Content (for example, feature films, drama productions or TV series) is often challenging to broadcast or streamed unaltered. This long-form content is  typically  characterised  by  a  large  Loudness-to-Dialogue  Ratio  (LDR)  (the  difference  between Programme Loudness (PL) and Dialogue Loudness1 (DL)) as well as large loudness variations. Such programmes can be compatible with playback, for example, in cinemas, but for broadcasting and streaming those characteristics can sometimes be excessive. This supplement to R 128 gives guidance on how to quantify and potentially adapt the dynamics of such programmes. Furthermore, guidance is given on the subsequent loudness normalisation.

Keywords: Loudness, Cinematic Content, Normalisation, R 128.