Browse Prior Art Database

Method and Devices for Transmission of Documents and Data via Facsimile Machine

IP.com Disclosure Number: IPCOM000117941D
Original Publication Date: 1996-Jul-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 115K

Publishing Venue

IBM

Related People

Chess, DM: AUTHOR

Abstract

The present invention involves facsimile systems that, at one or more points in the process, make use of the sign domain (also called the symbol domain; the ASCII character for "E" rather than a digitized image of a printed "E," for instance). By taking advantage of the fact that many documents are produced in sign-domain terms (on a computer word processor, for instance, rather than with a pen and ink), and that most documents, however, produced are capable of sign-domain interpretation, the invention reduces the time taken to transmit a typical document, and increases the accuracy of the reproduction at the receiving end, as well as enabling the reliable transmission of arbitrary binary data.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 47% of the total text.

Method and Devices for Transmission of Documents and Data via Facsimile
Machine

      The present invention involves facsimile systems that, at one
or more points in the process, make use of the sign domain (also
called the symbol domain; the ASCII character for "E"  rather than a
digitized image of a printed "E," for instance).  By taking advantage
of the fact that many documents are produced in sign-domain terms (on
a computer word processor, for instance, rather than with a pen and
ink), and that most documents, however, produced are capable of
sign-domain interpretation, the invention reduces the time taken to
transmit a typical document, and increases the accuracy of the
reproduction at the receiving end, as well as enabling the reliable
transmission of arbitrary binary data.  And by using the existing FAX
network (which can be upgraded a piece at a time to support this
invention), the transmission remains convenient and widely available.

A system embodying this invention consists of:
  o  A means for obtaining, in the sending FAX machine, a sign-domain
      representation of the document or other data to be transmitted,
  o  A protocol or protocols for transmitting sign-domain
      representations between FAX machines,
  o  An extension to existing FAX machine protocol-negotiation
      standards, by which: a sending machine can indicate to a
      receiving machine that it supports a certain sign-domain
      transmission protocol and requests that it be used for the
      current transmission; and a receiving machine can in return
      indicate either than it will use the sign-domain protocol, or
      that it does not support that protocol, and some other protocol
      that is shared will have to be found,
  o  A means in the receiving machine for producing a printed copy
      corresponding to the sign-domain data that was transmitted, or
      for otherwise delivering the data to the recipient.

      Means for obtaining a sign-domain representation of a document
or other data in the sending FAX machine include, but are not limited
to:
  o  An electronic transmission link to a computer system or network,
      by which users wishing to send a FAX may transmit an electronic
      copy of their document to the FAX machine (control information
      such as the number of address of the destination FAX machine
may
      be sent by this link as well, or by other means),
  o  A device in the FAX machine that can read electronic data from
      magnetic media, such as diskettes; users can then bring an
      electronic copy of the document or data to the FAX machine on
      such media,
  o  A traditional image scanner and optical-character-recognition
      software by means of which the FAX machine itself may obtain an
      image-domain representation of the document to be sent, and
      convert it int...