Browse Prior Art Database

Determination of Noncoded Information Facsimile Type From Strobe Bar Coding

IP.com Disclosure Number: IPCOM000084088D
Original Publication Date: 1975-Sep-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 3 page(s) / 56K

Publishing Venue

IBM

Related People

Jones, RE: AUTHOR

Abstract

A strobe-bar section affixed to the top of any document enables the system to automatically determine the type and vertical scan speed of any call-up facsimile device, without dedicated terminals or operator intervention. This automatic feature would allow auto-dialed, nondedicated ports to accept any type of facsimile information without modifying the existing facsimile machine. Such a store-and-forward system can be used with existing facsimile equipment of any type.

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Determination of Noncoded Information Facsimile Type From Strobe Bar Coding

A strobe-bar section affixed to the top of any document enables the system to automatically determine the type and vertical scan speed of any call-up facsimile device, without dedicated terminals or operator intervention. This automatic feature would allow auto-dialed, nondedicated ports to accept any type of facsimile information without modifying the existing facsimile machine. Such a store-and-forward system can be used with existing facsimile equipment of any type.

At present there are several types of facsimile machines on the market wherein compatibility is maintained between the machines by making the scanning and resolution rates the same. In order to allow different machines with different rates of scanning and resolution to be compatible, a store-and-forward system is contemplated. This requires that the store-and-forward device know what type of machine is calling, in order to process the data correctly. Inputs include such variations as analog or digital signals and four or six minute page scans. Such information is input to the system by the transmitting operator via telephone or similar devices. However, this results in additional cost and limitations on the facsimile machines.

A solution is to add a limited amount of hardware at each input port to the store-and-forward system and within the system determine the type of data (analog or digital), page scan rate (4 or 6 minute), and the transmitting machine type. This allows nondigital, unattended ports to handle auto-dialed facsimile transmissions from any type of machine on the market. However, this system requires that the modulation (MODEMS) system and the phasing schemes be the same for all machines, which is a present limitation.

A strobe-bar coded area 1 on the top (first scanned area of every transmitted page) of the transmitted document can be used to determine the type of transmitting unit. The store-and-forward system would use the data inputted from the bar codes to determine the type of transmitting facsimile machine, and therefore know data rates and if the input is digital or analog. The vertical scan rate (4 or 6 minute page) can also be determined. Bar codes can be at the top of a form letter or on gummed labels to be affixed to the top of any page. The same bar code form would be used for all machines.

Fig. 1 is one design of such a bar code. The system considers the bars as strobe bars and determines the machine type and vertical scan rate from the bar (black to white) transmission rate.

When the facsimile machine starts scanning Section 1 of the strobe-bar section, the system knows that the strobe-bar section has been reached by the long string of black bit...