Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Methods and apparatus for calculating electromagnetic scattering properties of a structure using a normal-vector field and for reconstruction of approximate structures
Lateral motion micro-electro-mechanical system contact switch
Integrated circuit packaging system having a cavity
Methods and systems for biometric verification
Compositions comprising nanomaterials and method for using such compositions for histochemical processes
Wig hanger
Video conferencing system, video conferencing apparatus, video conferencing control method, and video conferencing control program
  Randomly Featured Patents
Semiconductor systems utilizing materials that form rectifying junctions in both N and P-type doping regions, whether metallurgically or field induced, and methods of use
Method and structure for manufacturing contact windows in semiconductor process
Combined playing card box and holder
Multi-frequency boring tool locating system and method
Low power tri-level decoder circuit
Fast fluid bed methanol synthesis
Method and apparatus for managing communication between participants in a virtual environment
Pulsed laser source with high repetition rate
Light resolution element for irradiating dental replacement pieces with light to effect the hardening thereof
Superconductive magnet