Füg, S.S.FügHölzer, A.A.HölzerBorß, C.C.BorßErtel, C.C.ErtelKratschmer, M.M.KratschmerPlogsties, J.J.Plogsties2022-03-132022-03-132015https://publica.fraunhofer.de/handle/publica/396283For 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.enconference paper