Pattern matching device operable with signals of a...

Details Pattern matching device operable with signals of a... Pattern matching device operable with signals of a...

G - Physics

06

G

354/57

G06G 7/22 (2006.01) G06K 9/64 (2006.01) G10L 15/12 (2006.01)

Patent

CA 1173161

Abstract of the Disclosure A pattern matching device for calculating an overall similarity measure between a first and a second pattern represented by a first and a second sequence of feature vectors is described. The device comprises a first circuit for calculating an elementary similarity measure between each feature vector of the first sequence and each feature vector of the second sequence, and a second circuit for iteratively calculating a recurrence formula which defines a recurrence value by a sum of each elementary similarity measure and an extremum of a prescribed number of previously calculated recurrence values. The recurrence formula eventually gives an overall similarity measure between the two patterns. The elementary similarity measure is calculated by calculating a primitive similarity measure using a conventional circuit and subtracting a predetermined value therefrom using a compensation circuit. Preferably, the second circuit for iteratively calculating the recurrence formula comprises circuitry for preventing the sum from overflowing outwardly of a preselected range.

396312

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