@conference{spenger2001mpeg, title = {MPEG-21 - What does it bring to Audio?}, author = {Spenger, Gabriele and Herre, Jurgen and Neubauer, Christian and Rump, Niels}, booktitle = {Audio Engineering Society Convention 111}, month = {Nov}, year = {2001}, url = {https://www.aes.org/e-lib/browse.cfm?elib=9842} }