Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Speech separation with microphone arrays










Image Number 12 for United States Patent #8144896.

A system that facilitates blind source separation in a distributed microphone meeting environment for improved teleconferencing. Input sensor (e.g., microphone) signals are transformed to the frequency-domain and independent component analysis is applied to compute estimates of frequency-domain processing matrices. Modified permutations of the processing matrices are obtained based upon a maximum magnitude based de-permutation scheme. Estimates of the plurality of source signals are provided based upon the modified frequency-domain processing matrices and input sensor signals. Optionally, segments during which the set of active sources is a subset of the set of all sources can be exploited to compute more accurate estimates of frequency-domain mixing matrices. Source activity detection can be applied to determine which speaker(s), if any, are active. Thereafter, a least squares post-processing of the frequency-domain independent components analysis outputs can be employed to adjust the estimates of the source signals based on source inactivity.








 
 
  Recently Added Patents
Method and system for enabling rendering of electronic media content via a secure ad hoc network configuration utilizing a handheld wireless communication device
Soybean cultivar CL1013675
Co-crystals of agomelatine, a process for there preparation and pharmaceutical compositions containing them
Defect inspection method and device therefor
Measuring device and measuring method that use pulsed electromagnetic wave
Lighting device with device for regulating the illumination according to the luminance of the illumination field and corresponding use
Target output device and extreme ultraviolet light source apparatus
  Randomly Featured Patents
Apparatus for stacking documents in sequence
Endoscopic biopsy forceps jaws and instruments incorporating same
Cycling shoe
Post-tensioning anchor head assembly
Monoazo compounds having a thiazolium or substituted thiazolium diazo component radical and a 1,4-phenylene coupling component radical having a C.sub.1-4 alkyl group in each ortho position
Elastomeric compositions
Protective seal for use in cans or the like for packaging beverages or the like
Contactless optical process for identifying objects
Printed circuit board
Fluidized bed gas generator for allothermic gasification of coal