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Perceptual loudness compensation in interactive object-based audio coding systems

: Paulus, Jouni


European Association for Signal Processing -EURASIP-; Institute of Electrical and Electronics Engineers -IEEE-:
23rd European Signal Processing Conference, EUSIPCO 2015 : August 31 - September 4, 2015, Nice
Piscataway, NJ: IEEE, 2015
ISBN: 978-0-9928626-3-3
ISBN: 978-0-9928626-4-0
European Signal Processing Conference (EUSIPCO) <23, 2015, Nice>
Fraunhofer IIS ()
Standards in der Audiocodierung; semantic audio processing; MPEG-D; Hörtests; audio

Changing the rendering through interactivity in object-based audio coding may change the overall signal loudness. This paper proposes a method for estimating the change in the overall loudness using loudness information of the partial mixes and the rendering description. The method has been designed for a dialogue enhancement application scenario. The results of the method are compared with reference values from measurements, and the results match well with the mean absolute error of 0.11 LU. A subjective listening test is conducted for studying the amount of amplification applied by the test participants on a probe signal simulating the result of an interactive rendering when comparing it with a reference signal of the default mix. The average level adjustment reflects the change in the signal loudness through the modification.