Resources Contact Us Home
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 automatically hiding irrelevant parts of hierarchical structures in computer user interfaces
Temporal document trainer and method
Barrier layers comprising Ni-inclusive ternary alloys, coated articles including barrier layers, and methods of making the same
Can seam inspection
Developing device
Method and system for updating device management application meter read logic
Refuelable battery-powered electric vehicle
  Randomly Featured Patents
Woven wire structures
Method and apparatus for dispensing discount coupons in response to the purchase of one or more products
Dialkyl ether production
Test circuit of semiconductor memory device having data scramble function
Energy saving device for clothes dryer and clothes dryer system comprising same
Snow-shoveling apparatus
Processing image data to transform color volumes
Brassiere with size and configuration adjustment mechanism
Method for treating epithelial precancerous lesions with topical inidazoles
Cineconversion machine