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Determining an Optimal Gated Loudness Measurement for TV Sound Normalization

Undesirable loudness jumps are a notorious problem in television broadcast. The solution consists in switching to loudness-based metering and program normalization. In Europe this development has been led by the EBU P/LOUD group, working towards a single target level for loudness normalization applying to all genres of programs. P/LOUD found that loudness normalization as specified by ITU-R BS.1770-1 works fairly well for the majority of broadcast programs. However, it was realized that wide loudness-range programs were not well-aligned with other programs when using ITU-R BS.1770-1 directly, but that adding a measurement-gate provided a simple yet effective solution. P/LOUD therefore conducted a formal listening experiment to perform a subjective evaluation of different gate parameters. This paper specifies the method of the subjective evaluation and presents the results in term of preferred gating parameters.

Authors: Grimm, Eelco; Skovenborg, Esben; Spikofski, Gerhard
Affiliations: Grimm-Audio, Eindhoven, The Netherlands; tc-electronic, Risskov, Denmark; Institute of Broadcast Technology, Berlin, Germany(See document for exact affiliation information.)
AES Convention:128 (May 2010) Paper Number:8154 Import into BibTeX
Subject:Network, Internet, and Broadcast Audio

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