Frequency Domain Phase Model of Transient Events

Short KM. Frequency Domain Phase Model of Transient Events. In: AES Convention 121. Audio Engineering Society; 2006. Paper 6935. Available from: https://aes.org/publications/elibrary-page/?id=13769

@inproceedings{Short2006_13769,
  author = {Short, Kevin M.},
  title = {{Frequency Domain Phase Model of Transient Events}},
  booktitle = {AES Convention 121},
  note = {Paper 6935},
  year = {2006},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13769}
}

TY  - CPAPER
TI  - Frequency Domain Phase Model of Transient Events
AU  - Short, Kevin M.
T2  - AES Convention 121
M1  - Paper 6935
PY  - 2006
DA  - 2006/10/06
UR  - https://aes.org/publications/elibrary-page/?id=13769
PB  - Audio Engineering Society
LA  - en
AB  - Short time transient events are extremely challenging to represent in the transform domain employed by common transform-based codecs used in applications such audio compression. These short-time events last for a duration that is much shorter than a typical data window, and consequently have power distributed throughout the transform domain. Accurate representation of these events in the transform domain requires higher bitrates than usually available. A common solution is to use window switching, where smaller windows are used for short time transient events, but this has a negative impact on the bitrate as well. In this paper, we show that with certain simplifying assumptions, transient reconstruction can be reduced to a tractable problem that is performed in the frequency domain, so that the transient event can be easily mixed in with the representation of the non-transient events. A closed form frequency domain representation for the phase of a transient event is introduced, and it is shown that this can be done in an iterative way that allows for increasingly complex transient structures back in the time domain.
ER  -