Using Cascaded Global Optimization for Filter Bank Design in Low Delay Audio Coding

Preihs S, Ostermann J. Using Cascaded Global Optimization for Filter Bank Design in Low Delay Audio Coding. In: AES Convention 139. Audio Engineering Society; 2015. Paper 9403. Available from: https://aes.org/publications/elibrary-page/?id=17960

@inproceedings{Preihs2015_17960,
  author = {Preihs, Stephan and Ostermann, Jörn},
  title = {{Using Cascaded Global Optimization for Filter Bank Design in Low Delay Audio Coding}},
  booktitle = {AES Convention 139},
  note = {Paper 9403},
  year = {2015},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17960}
}

TY  - CPAPER
TI  - Using Cascaded Global Optimization for Filter Bank Design in Low Delay Audio Coding
AU  - Preihs, Stephan
AU  - Ostermann, Jörn
T2  - AES Convention 139
M1  - Paper 9403
PY  - 2015
DA  - 2015/10/06
UR  - https://aes.org/publications/elibrary-page/?id=17960
PB  - Audio Engineering Society
LA  - en
AB  - This paper demonstrates the possibility of finding suitable design parameters for a filter bank optimization procedure by the use of global optimization techniques. After the Nayebi filter bank optimization algorithm is summarized and its degrees of freedom are described, a global optimization framework for the parameters involved in the design process is presented. It includes a cost function monitoring the frequency characteristics and reconstruction properties of different filter bank designs and allows for an automatic search of suitable design parameters for a given number of bands and taps and a predefined delay. The global optimization itself is done by means of well known methods like pattern search and the genetic algorithm. Experiments show that with our method manual parameter adjustment becomes obsolete. Furthermore with our proposed cascaded optimization, compared to manually adjusted designs, a gain of up to 10 dB in stopband attenuation can be achieved without loss in reconstruction quality.
ER  -