Telefacsimile module connectable to telefacsimile machines for t

Details Telefacsimile module connectable to telefacsimile machines for t Telefacsimile module connectable to telefacsimile machines for t

1994-12-27

1998-09-01

Lee, Thomas D.

Facsimile and static presentation processing

Facsimile

Auxiliary signal

358462, 358468, 358435, 379100, H04N 140

Patent

active

058018425

ABSTRACT:
A telefacsimile module is connected between a conventional telefacsimile machine (host telefacsimile unit) and a phone line interface. The module receives conventional fax output from its host unit and re-transmits them to a destination telefacsimile machine in one of standard and high speed modes depending on the compatibility of the destination telefacsimile. The standard mode communication employs a conventional fax format for both text and graphics. The high speed mode distinguishes text from graphics and performs optical character recognition on suspected character information. When characters are successfully recognized, only a code, e.g. ASCII, and the location of the character is transmitted, realizing significant improvements in compression ratios over conventional facsimile coding. Graphics and unrecognizable characters are transmitted as bit-mapped pixels or in conventional compressed fax format. The telefacsimile module is also capable of receiving incoming faxes from transmitting facsimile machines through the phone line interface in both the standard and high speed modes. Faxes sent and received in the high speed mode contain codes for text characters and bit-mapped or compressed pixels for graphics and unrecognized characters and are either printed or recorded in a storage medium. Since text characters are received as codes, any desired printing resolution can be selected for them.

REFERENCES:
patent: 4922348 (1990-05-01), Gillon et al.
patent: 5377021 (1994-12-01), Mori
patent: 5436981 (1995-07-01), Ishikawa

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