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Error Correcting Bar Coded Font

IP.com Disclosure Number: IPCOM000095747D
Original Publication Date: 1964-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Van Steenis, H: AUTHOR

Abstract

Designs are shown for a set of stylized numerical characters in A and for a set of stylized alphanumerical characters in B. These characters are legible for the human being and also are adapted for reliability machine reading.

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Error Correcting Bar Coded Font

Designs are shown for a set of stylized numerical characters in A and for a set of stylized alphanumerical characters in B. These characters are legible for the human being and also are adapted for reliability machine reading.

The characters of A each consist of a combination of seven bar elements in a 3x4 matrix, four of which form the characters themselves and three of which are placed in a sampling track. These sampling marks can be used to trigger the sampling.

In the character set of 13, the sampling track becomes an integral part of the Character itself. All the characters, except the T and the special symbol, are coded with eight bar elements in a 3x5 matrix.

In both sets, the selection of each character code is carried out in such a way that a Hamming Distance of four bits is achieved. This means that up to 3-bit errors can be detected or that 1-bit errors can be corrected and 2-bit errors can be detected.

Since, in both sets, all the characters are coded with an equal number of vertical bars, the printability of the characters is improved.

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