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Design, coding and processing of metadata for object-based interactive audio

: Füg, S.; Hölzer, A.; Borß, C.; Ertel, C.; Kratschmer, M.; Plogsties, J.

Audio Engineering Society -AES-:
137th Audio Engineering Society Convention 2014. Vol.1 : Los Angeles, California, USA, 9 - 12 October 2014
Red Hook, NY: Curran, 2015
ISBN: 978-1-63439-748-3
Audio Engineering Society (AES Convention) <137, 2014, Los Angeles/Calif.>
Fraunhofer IIS ()

For object-based audio, an appropriate definition of metadata is needed to ensure flexible playback in any reproduction scenario and to allow for interactivity. Important use-cases for object-based audio and audio interactivity are described and requirements for metadata are derived. A metadata scheme is defined that allows for enhanced audio rendering techniques such as content-dependent processing, automatic scene scaling and enhanced level control. Also, a metadata preprocessing logic is proposed that prepares rendering and playout and allows for user interaction with the audio content of an object-based scene. In addition, the paper points out how the metadata can be transported efficiently in a bitstream. The proposed metadata scheme has been adopted and integrated into the currently finalized MPEG-H 3D Audio standard.