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
T2 - 4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010
Y2 - 13 December 2010 through 15 December 2010
ER -