Resources Contact Us Home
Sound source separation system which converges a separation matrix using a dynamic update amount based on a cost function

Image Number 8 for United States Patent #8131542.

A system capable of separating sound source signals with high precision while improving a convergence rate and convergence precision. A process of updating a current separation matrix W.sub.k to a next separation matrix W.sub.k+1 such that a next value J(W.sub.k+1) of a cost function is closer to a minimum value J(W.sub.0) than a current value J(W.sub.k) is iteratively performed. An update amount .DELTA.W.sub.k of the separation matrix is increased as the current value J(W.sub.k) of the cost function is increased and is decreased as a current gradient .differential.J(Wk)/.differential.W of the cost function is rapid. On the basis of input signals x from a plurality of microphones M.sub.i and an optimal separation matrix W.sub.0, it is possible to separate sound source signals y(=W.sub.0x) with high precision while improving a convergence rate and convergence precision.

  Recently Added Patents
Difference amplifier arrangement with transconductance amplifier based current compensation
Camera-based scanning
Change detection of target identification data in lawful interception systems
Use of mifepristone and derivatives therefor as Hedgehog protein signaling pathway modulators and applications of same
Compounds as receptor modulators with therapeutic utility
Composition and method for modulating hydrogen ion physiology
Systems and methods for searching using queries written in a different character-set and/or language from the target pages
  Randomly Featured Patents
Method and system for clock-signal waveform correction
Seatbelt usage detection system
Positive-working quinonediazide photoresist composition containing hydroxyalkyl substituted pyridine compound
Deflectable unitary latch
Fungicidal active combinations spiroxamine, prothioconazole and tebuconazole
Silicone spider esters in personal care applications
Image projection apparatus
Flow regulator for hydraulic circuits
Enhanced structure for salicide MOSFET
Detachable coupling for a suction head