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Browse Prior Art Database

Time Zone Boundary Extension for Single Gap Micro System

IP.com Disclosure Number: IPCOM000045790D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Ku, EH: AUTHOR

Abstract

An analog wave shape 10, which is characteristic of a magnetic ink character 6 as read by a single-gap transducer, is analyzed by extending the zonal boundaries in which wave components are integrated to improve recognition of poorly executed characters.

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Time Zone Boundary Extension for Single Gap Micro System

An analog wave shape 10, which is characteristic of a magnetic ink character 6 as read by a single-gap transducer, is analyzed by extending the zonal boundaries in which wave components are integrated to improve recognition of poorly executed characters.

Wave shape 10 has peaking curves or components 11-17, which should reside respectively in fixed time zones T1-T7. Recognition is achieved by integrating the curves 11-17 for each respective time zone, to produce a pattern of time zone integrated voltages which can be supplied to weighted summing recognition circuits 20, 21, etc. The output of each summing circuit will be higher or lower, depending upon how well the input voltage pattern matches the weightings of the respective summing circuit. A comparison circuit 30 determines which summing circuit 20, 21, etc., presents the highest output and delivers a coded representation of the character thus recognized.

Characters 6 are often misprinted as having extra heavy lines due to embossing, thereby providing a somewhat distorted or non-standard shape. Such distortion produces a waveform having portions, such as 18 of peak curve 11, which extend into the subsequent time zone, thus reducing the information available as to the true character of the wave shape. Recognition is improved by extending the time for integration for each time zone by a small fixed increment 19, growing beyond the standard time zone.

In a...