Time-Varying Filter Banks with Low Delay for Audio Coding

Schuller G. Time-Varying Filter Banks with Low Delay for Audio Coding. In: AES Convention 105. Audio Engineering Society; 1998. Paper 4809. Available from: https://aes.org/publications/elibrary-page/?id=8371

@inproceedings{Schuller1998_8371,
  author = {Schuller, Gerald},
  title = {{Time-Varying Filter Banks with Low Delay for Audio Coding}},
  booktitle = {AES Convention 105},
  note = {Paper 4809},
  year = {1998},
  month = sep,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=8371}
}

TY  - CPAPER
TI  - Time-Varying Filter Banks with Low Delay for Audio Coding
AU  - Schuller, Gerald
T2  - AES Convention 105
M1  - Paper 4809
PY  - 1998
DA  - 1998/09/06
UR  - https://aes.org/publications/elibrary-page/?id=8371
PB  - Audio Engineering Society
LA  - en
AB  - A design method and filter structure for fast modulated low delay filter banks is presented. The system delay can be pre-specified independent of the filter length. Perfect reconstruction is structurally guaranteed. It is shown how to make this structure time-varying, which includes switching the number of bands, while maintaining perfect reconstruction. Low delay filter banks, besides having the advantage of a low system delay, can reduce pre-echoes in coding applications. Design examples are shown, including a low delay filter bank which can be switched between 1024 and 128 bands. Results of listening tests with the MPEG-AAC coder show that they indeed can be used to reduce pre-echoes in non-stationary signals like castanets.
ER  -