Title:
SIGNAL PROCESSING DEVICE, METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2022/064602
Kind Code:
A1
Abstract:
This signal processing device comprises: an initial setting unit 1 that sets a separation matrix W to an initial value, the separation matrix W being W = [w1, ···, wK]∈CK×K where K is a positive integer of 2 or more and the number of microphones and sound sources; an auxiliary function updating unit 2 that updates an auxiliary function g(W) by updating, on the basis of the separation matrix W and an observation signal, a positive-definite Hermitian matrix V1, ···, VK appearing in the auxiliary function g(W), with h denoting a complex conjugate transpose; a separation matrix updating unit 3 that updates the separation matrix W by solving an optimization problem which minimizes the updated auxiliary function g(W) with respect to the separation matrix W by the multiplicative update algorithm of the separation matrix W; and a control unit 4 that performs control such that processing of the auxiliary function updating unit and processing of the separation matrix updating unit are alternately repeatedly performed until a predetermined convergence condition is satisfied.
Inventors:
IKESHITA RINTARO (JP)
NAKATANI TOMOHIRO (JP)
NAKATANI TOMOHIRO (JP)
Application Number:
PCT/JP2020/036059
Publication Date:
March 31, 2022
Filing Date:
September 24, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G10L21/0272
Foreign References:
| JP2013068938A | 2013-04-18 |
Other References:
ROBIN SCHEIBLER: "Independent Vector Analysis via Log-Quadratically Penalized Quadratic Minimization", ARXIV.ORG, CORNELL UNIVERSITY LIBRARY, 201 OLIN LIBRARY CORNELL UNIVERSITY ITHACA, NY 14853, 23 August 2020 (2020-08-23), 201 Olin Library Cornell University Ithaca, NY 14853 , XP081746784
KUBO, YUKI : "Rank-constrainedspatial covariance matrix estimation based on multivariate complex generalized Gaussian distribution and its acceleration for blind speech extraction", IEICE TECHNICAL REPORT, vol. 119, no. 334, 5 December 2019 (2019-12-05), JP , pages 85 - 92, XP009535758, ISSN: 0913-5685
KUBO, YUKI : "Rank-constrainedspatial covariance matrix estimation based on multivariate complex generalized Gaussian distribution and its acceleration for blind speech extraction", IEICE TECHNICAL REPORT, vol. 119, no. 334, 5 December 2019 (2019-12-05), JP , pages 85 - 92, XP009535758, ISSN: 0913-5685
Attorney, Agent or Firm:
NAKAO, Naoki et al. (JP)
Download PDF: