Patent ID: 6389377
Filing Date: 2002-05-14
Classification: G10L

Abstract:
A mixed-mode very-large-scale integration (VLSI) device for real-time classification of acoustic transients by correlating an input signal comprising a plurality of input currents with a plurality of stored template values, the device comprising:means for generating the plurality of input currents from collected acoustic transient data; a normalizer for normalizing the plurality of input currents; a switched-capacitor circuit for time and/or channel differencing the input currents; a correlator array comprising a plurality of cells for receiving the plurality of normalized, time and/or channel differenced input currents and for comparing the input current received in each cell with the template value stored in each cell and for adding the input current to a total current if there is a match; a bucket brigade device for summing the input currents added by the cells of the correlator array; and means for classifying the acoustic transients using an output of the bucket brigade device.