Details
| Original language | English |
|---|---|
| Publication status | Published - 2015 |
| Event | 139th Audio Engineering Society International Convention, AES 2015 - New York, United States Duration: 29 Oct 2015 → 1 Nov 2015 |
Conference
| Conference | 139th Audio Engineering Society International Convention, AES 2015 |
|---|---|
| Country/Territory | United States |
| City | New York |
| Period | 29 Oct 2015 → 1 Nov 2015 |
Abstract
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Acoustics and Ultrasonics
- Mathematics(all)
- Modelling and Simulation
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2015. Paper presented at 139th Audio Engineering Society International Convention, AES 2015, New York, United States.
Research output: Contribution to conference › Paper › Research › peer review
}
TY - CONF
T1 - Using cascaded global optimization for filter bank design in low delay audio coding
AU - Preihs, Stephan
AU - Ostermann, Jörn
PY - 2015
Y1 - 2015
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=84983196527&partnerID=8YFLogxK
M3 - Paper
T2 - 139th Audio Engineering Society International Convention, AES 2015
Y2 - 29 October 2015 through 1 November 2015
ER -