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
Process to increase selectivity to ethylene in oxygenates-to-olefins conversions
Method and system for implementing power detection
Heterogeneous language data typing without executable regeneration
Article based on a composition containing a crosslinked blend of elastomers
Press nut
Molecular hydrogen stores and hydrogen transfer reagents for hydrogenation reactions
Autonomous adaptation of transmit power
  Randomly Featured Patents
Conveyor for garment hangers
Method and system for providing wireless internet protocol access
Prostaglandin derivatives for the treatment of glaucoma or ocular hypertension
Hydrodynamic torque converter
Personal computer tower unit
Seal member mounting structure in electromagnetic fuel injection valve
System for transporting frequency hopping signals
Wall reinforcement using constant force
Liposuction cannula
Ground rod driving apparatus