LUFS

Common card · No. 336228

Loudness units relative to full scale (LUFS), also known as loudness, K-weighted, relative to full scale (LKFS), is a standard loudness measurement unit used for audio normalization in broadcast television systems and other video and music streaming services. LUFS is a synonym for LKFS that was introduced in EBU R 128. LKFS is standardized in ITU-R BS.1770. In March 2011, the International Telecommunication Union (ITU) introduced a loudness gate in the second revision of the recommendation, ITU-R BS.1770-2. In August 2012, the ITU released the third revision of this recommendation ITU-R BS.1770-3. In October 2015, the ITU released the fourth revision of this recommendation ITU-R BS.1770-4. In November 2023, the ITU released the fifth revision of this recommendation ITU-R BS.1770-5. K-weighting refers to the frequency weighting function applied to the audio signal before measurement, and is defined in ITU-R BS.1770. The European Broadcasting Union (EBU) has suggested that the ITU should...

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