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
Optical power measurement method, optical line terminal and optical network unit
Utility knife
Enhanced claims damage estimation using aggregate display
Optical navigation device with image sensor and inner housing
Laser processing method and apparatus
System and method for the analysis of biodiesel
Wound dressing with a discontinuous contact layer surface
  Randomly Featured Patents
System and method for steering fresnel region data to access data locations in a holographic memory
Backlight module for flat panel display
Vehicle personalization system
Advanced URL and IP features
Material for capturing microbes, device for capturing microbes, method of capturing microbes, and method of producing material for capturing microbes
Noncontract IC tag with non-conductive metal film
Method, system, and computer-readable medium for creating and laying out a graphic within an application program
Weft mixer devices for looms
Cellular handheld device with FM Radio Data System receiver