Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1982-02-03
1984-10-23
Martin, John C.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
382 3, 382 34, G06K 900
Patent
active
044792360
ABSTRACT:
A pattern matching device generally comprises a first circuit (36) for calculating an elementary similarity measure between two feature vectors, one and the other selected from two feature vector sequences representative of two patterns, respectively, and a second circuit (37) for iteratively calculating a recurrence formula which defines a recurrence value by a sum of such an 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 now calculated by calculating a primitive similarity measure by a conventional circuit (15) and subtracting a predetermined value therefrom by a compensation circuit (31). Preferably, the second circuit (37) comprises circuitry (41, 42) for preventing the sum from overflowing outwardly of a preselected range.
REFERENCES:
patent: 3816722 (1974-06-01), Sakoe et al.
patent: 3983535 (1976-09-01), Herbst et al.
Martin John C.
McDowell Erin A.
Nippon Electric Co. Ltd.
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