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Method for Printing Delta Distance Code

IP.com Disclosure Number: IPCOM000078643D
Original Publication Date: 1973-Feb-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Leybourne, J: AUTHOR

Abstract

The described method pertains to printing delta distance code with unique coding for each character and reduced bar count. Since each character is uniquely coded, no memory or logic is required as in previous methods.

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Method for Printing Delta Distance Code

The described method pertains to printing delta distance code with unique coding for each character and reduced bar count. Since each character is uniquely coded, no memory or logic is required as in previous methods.

Consider printing a word of M characters each consisting of N-binary bits (the code may be BDC, EBCDIC or any fixed length code). Under previous methods, a start space (2 bars) is added at the beginning of each character and each character is uniquely coded.

The total number of bars is M (N+2).

With this method, each character still uses a start space formed by 2 bars, except that the first bar is not printed. Instead, the last bar of the previous character serves as the first bar of the next following character printed in delta distance code. Accordingly, the total number of bars required is M(N+1) +1.

(Image Omitted)

Table 1 displays the previous and subject delta distance code numeric characters. Accordingly, Fig. 1 displays a coded decimal "12" in accordance with previous and subject coding techniques.

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