Abstract
In this paper, we propose a new score function for subband decomposition ICA to improve the algorithm performance. Subband decomposition ICA is known to having better separation performance than frequency-domain ICA. However, it is basically time-domain ICA, with much shorter filters, performed on each subband. In this paper, discussion is focused on an information-maximization based approach which performance depends on the distribution assumption of source signals. We propose the use of a generalized Cauchy distribution as a new distribution assumption to derive a new score function. With the proposed score-function, the performance of subband decomposition ICA algorithm is significantly improved in terms of both SIR and convergence speed.
| Original language | English |
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| Title of host publication | 4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010 - Proceedings |
| DOIs | |
| Publication status | Published - Dec 1 2010 |
| Event | 4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010 - Gold Coast, QLD, Australia Duration: Dec 13 2010 → Dec 15 2010 |
Publication series
| Name | 4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010 - Proceedings |
|---|
Conference
| Conference | 4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010 |
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| Country | Australia |
| City | Gold Coast, QLD |
| Period | 12/13/10 → 12/15/10 |
Fingerprint
ASJC Scopus subject areas
- Computer Networks and Communications
- Signal Processing
Cite this
Generalized Cauchy Distribution (GCD)-based score functions for a fast and flexible subband decomposition ICA. / Kanadi, Marko; Akhtar, Muhammad Tahir; Mitsuhashi, Wataru.
4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010 - Proceedings. 2010. 5709754 (4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010 - Proceedings).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Generalized Cauchy Distribution (GCD)-based score functions for a fast and flexible subband decomposition ICA
AU - Kanadi, Marko
AU - Akhtar, Muhammad Tahir
AU - Mitsuhashi, Wataru
PY - 2010/12/1
Y1 - 2010/12/1
N2 - In this paper, we propose a new score function for subband decomposition ICA to improve the algorithm performance. Subband decomposition ICA is known to having better separation performance than frequency-domain ICA. However, it is basically time-domain ICA, with much shorter filters, performed on each subband. In this paper, discussion is focused on an information-maximization based approach which performance depends on the distribution assumption of source signals. We propose the use of a generalized Cauchy distribution as a new distribution assumption to derive a new score function. With the proposed score-function, the performance of subband decomposition ICA algorithm is significantly improved in terms of both SIR and convergence speed.
AB - In this paper, we propose a new score function for subband decomposition ICA to improve the algorithm performance. Subband decomposition ICA is known to having better separation performance than frequency-domain ICA. However, it is basically time-domain ICA, with much shorter filters, performed on each subband. In this paper, discussion is focused on an information-maximization based approach which performance depends on the distribution assumption of source signals. We propose the use of a generalized Cauchy distribution as a new distribution assumption to derive a new score function. With the proposed score-function, the performance of subband decomposition ICA algorithm is significantly improved in terms of both SIR and convergence speed.
UR - http://www.scopus.com/inward/record.url?scp=79952502820&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79952502820&partnerID=8YFLogxK
U2 - 10.1109/ICSPCS.2010.5709754
DO - 10.1109/ICSPCS.2010.5709754
M3 - Conference contribution
AN - SCOPUS:79952502820
SN - 9781424479078
T3 - 4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010 - Proceedings
BT - 4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010 - Proceedings
ER -