Delayless Mixing - On the Benefits of MPEG-4 AAC-ELD in High Quality Communication Systems

Albert T, Ekstrand P, Geiger R, Henn F, Lutzky M, Przioda D, Ruoppila V, Schmidt M, Schnell M, Tarnes E. Delayless Mixing - On the Benefits of MPEG-4 AAC-ELD in High Quality Communication Systems. In: AES Convention 124. Audio Engineering Society; 2008. Paper 7337. Available from: https://aes.org/publications/elibrary-page/?id=14467

@inproceedings{Albert2008_14467,
  author = {Albert, Tobias and Ekstrand, Per and Geiger, Ralf and Henn, Fredrik and Lutzky, Manfred and Przioda, Daniel and Ruoppila, Vesa and Schmidt, Markus and Schnell, Markus and Tarnes, Erlend},
  title = {{Delayless Mixing - On the Benefits of MPEG-4 AAC-ELD in High Quality Communication Systems}},
  booktitle = {AES Convention 124},
  note = {Paper 7337},
  year = {2008},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14467}
}

TY  - CPAPER
TI  - Delayless Mixing - On the Benefits of MPEG-4 AAC-ELD in High Quality Communication Systems
AU  - Albert, Tobias
AU  - Ekstrand, Per
AU  - Geiger, Ralf
AU  - Henn, Fredrik
AU  - Lutzky, Manfred
AU  - Przioda, Daniel
AU  - Ruoppila, Vesa
AU  - Schmidt, Markus
AU  - Schnell, Markus
AU  - Tarnes, Erlend
T2  - AES Convention 124
M1  - Paper 7337
PY  - 2008
DA  - 2008/05/06
UR  - https://aes.org/publications/elibrary-page/?id=14467
PB  - Audio Engineering Society
LA  - en
AB  - Tele- and video conferencing systems for modern business communication are managed by central hubs, so-called multipoint control units (MCU). One major task of these units is the mixing of audio streams from the participating sites. This is traditionally done by decoding the streams, mixing in time domain and then re-encoding of the mixed signals. This requires additional processing power, leads to increased delay and degraded audio quality. The paper demonstrates how the recently standardized MPEG-4 Enhanced Low Delay AAC (AAC-ELD) codec offers a solution to these problems by efficient and delayless mixing in the transform domain of the codec.
ER  -