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
Method for transmitting a signal from a transmitter to a receiver in a power line communication network, transmitter, receiver, power line communication modem and power line communication syst
Hepodxilin analog enantiomers
Treatment of cancer using the sodium salt of a benzoic acid derivative
Co-crystals of agomelatine, a process for there preparation and pharmaceutical compositions containing them
Reduction of HMF ethers with metal catalyst
Hand sign
Barrier layers comprising Ni-inclusive ternary alloys, coated articles including barrier layers, and methods of making the same
  Randomly Featured Patents
Air-code magnetic flux guide
Spark management method and device
Method and apparatus for-soft-output viterbi detection using a multiple-step trellis
Method and system of interleaving for a multiple-input multiple-output multi-band OFDM communication system
Ink-package assembly, and method of producing the same
Anti-veining agent for metal casting
Selective recognition of solutes in chromatographic media by artificially created affinity
Polylactic acid fibers
Method for fabricating memory device
Ice maker with mechanism for determining a position of an ice-making tray