(19)
(11) EP 1 752 969 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 158(3) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
04.07.2007 Bulletin 2007/27

(43) Date of publication:
14.02.2007 Bulletin 2007/07

(21) Application number: 06713235.7

(22) Date of filing: 07.02.2006
(51) International Patent Classification (IPC): 
G10L 21/02(2006.01)
(86) International application number:
PCT/JP2006/302092
(87) International publication number:
WO 2006/085537 (17.08.2006 Gazette 2006/33)
(84) Designated Contracting States:
DE FR GB

(30) Priority: 08.02.2005 JP 2005031824
11.03.2005 JP 2005069768
07.06.2005 JP 2005166760

(71) Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Tokyo 100-8116 (JP)

(72) Inventors:
  • SAWADA, Hiroshi c/o NTT IP Center
    Musashino-shi, Tokyo, 1808585 (JP)
  • ARAKI, Shoko c/o NTT IP Center
    Musashino-shi, Tokyo, 1808585 (JP)
  • MUKAI, Ryo c/o NTT IP Center
    Musashino-shi, Tokyo, 1808585 (JP)
  • MAKINO, Shoji c/o NTT IP Center
    Musashino-shi, Tokyo, 1808585 (JP)

(74) Representative: Hoffmann, Eckart 
Bahnhofstrasse 103
82166 Gräfelfing
82166 Gräfelfing (DE)

   


(54) SIGNAL SEPARATION DEVICE, SIGNAL SEPARATION METHOD, SIGNAL SEPARATION PROGRAM, AND RECORDING MEDIUM


(57) A frequency domain transforming section 2 transforms mixed signals observed by multiple sensors into mixed signals in the frequency domain, a complex vector generating section 3 generates a complex vector by using the frequency-domain mixed signals, a normalizing section 4 generates a normalized vector excluding frequency dependence of the complex vector, and a clustering section 5 clusters the normalized vectors to generate clusters. Then, a separated signal generating section 6 generates separated signals in the frequency domain by using information about the clusters and a time domain transforming section 7 transforms the separated signals in the frequency domain into separated signals in the time domain.