Browse Prior Art Database

Wave Shape Comparison System

IP.com Disclosure Number: IPCOM000098733D
Original Publication Date: 1959-Oct-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Quade, EA: AUTHOR

Abstract

This is a system for comparing an unknown signal, for example, one generated by the sensing of a printed character with one or more known signals to determine the identity of the unknown signal and one of the known signals, independently of their phase relationship.

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Wave Shape Comparison System

This is a system for comparing an unknown signal, for example, one generated by the sensing of a printed character with one or more known signals to determine the identity of the unknown signal and one of the known signals, independently of their phase relationship.

The system includes a number of reference function generators 1 in which the known signals representing various characters are recorded and by which such signals are generated at a greater frequency than that of the unknown signals which are generated by sensing means 2.

The known signals from generators 1, one of which is represented by the solid line in the middle figure, are fed into corresponding comparing means 3 where comparisons are made simultaneously with the unknown signals from the sensing means 2, represented by the broken line in the middle figure, which signals are fed in parallel to all comparing means 3.

In each comparing unit 3, the coincidence of a selected parameter of the signals from the unit 2 and the corresponding unit 1, for example, amplitude or slope, produces series of signals on lines 4, representing coincidence of the selected parameter.

The one comparing unit 3, which is receiving signals from a unit 1 in which the same character as the unknown character is stored, emits a series of signals on its line 4 which contains a number of randomly spaced pulses r and a number of evenly spaced pulses e. The number of e pulses may be determined mathemat...