Schedule as of Oct 11, 2022 - subject to change

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Thursday, October 27 • 2:30pm - 2:45pm
Validating Loudness Alignment via Subjective Preference: Towards Improving ITU-R BS.1770-4

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Loudness measurement and control is important for many audio applications such as audio, television broadcasting and streaming. The recommendation ITU-R BS.1770-4 specifies means for measuring the loudness of audio signals. This paper presents experiments and results to investigate deviations between these measurements and loudness perception of human listeners. We conducted two loudness adjustment tests which quantify these deviations and one subsequent validation test to evaluate the effect of these deviations on the quality of loudness alignment. Adjustment gains obtained by ITU-R BS.1770-4 and human listeners differ on average by 2.2 dB. The listener agreement, however, is rather weak for some items, which brings up the question if the obtained data is useful for improving loudness measurements.
The results of the validation test show an improvement of perceived loudness alignment quality by 16 % (of the used Mean Opinion Score scale) for gains obtained in the adjustment tests compared to ITU-R BS.1770-4. Since different listener groups participated in each test we conclude that the results of the adjustment tests are representative and can be used in future work to make loudness measurements more robust across a wider range of audio content and for object-based next-generation audio.

avatar for Christian Uhle

Christian Uhle

Chief Scientist, Fraunhofer IIS
Christian Uhle is chief scientist in the Audio and Media Technologies division of the Fraunhofer IIS, Erlangen, Germany, and in the International Audio Laboratories Erlangen.He received the Dipl.-Ing. and PhD degrees from the Technical University of Ilmenau, Germany, in 1997 and 2008... Read More →

Hans-Ulrich Berendes

Student, Fraunhofer IIS
I'm a student in the Elite Master's program Advanced Signal Processing and Communications Engineering at Friedrich-Alexander Universität Erlangen-Nürnberg and a working student at the Fraunhofer Institute for Integrated Circuits (IIS), in Erlangen, Germany. My research interests... Read More →
avatar for Alessandro Travaglini

Alessandro Travaglini

Research Engineer, Fraunhofer IIS
With extensive background as a Senior Sound Designer, Audio Consultant and Product Manager going back over 25 years in broadcasting and audio technology, Alessandro works at the Fraunhofer Institute for Integrated Circuits in the Media Systems and Applications division where he contributes... Read More →

Thursday October 27, 2022 2:30pm - 2:45pm EDT
Online Papers
  Psychoacoustics and Perception
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