File Format for Internet Fax
RFC 2301

Document Type RFC - Proposed Standard (March 1998; No errata)
Obsoleted by RFC 3949
Last updated 2013-03-02
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Network Working Group                                       L. McIntyre
Request for Comments: 2301                            Xerox Corporation
Category: Standards Track                                     S. Zilles
                                                    Adobe Systems, Inc.
                                                             R. Buckley
                                                      Xerox Corporation
                                                             D. Venable
                                                      Xerox Corporation
                                                             G. Parsons
                                                       Northern Telecom
                                                            J. Rafferty
                                                   Human Communications
                                                             March 1998

                      File Format for Internet Fax

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (1998).  All Rights Reserved.

Abstract

   This document describes the TIFF (Tag Image File Format)
   representation of image data specified by the ITU-T Recommendations
   for black-and-white and color facsimile. This file format
   specification is commonly known as TIFF-FX. It formally defines
   minimal, extended and lossless JBIG modes (Profiles S, F, J) for
   black-and-white fax, and base JPEG, lossless JBIG and Mixed Raster
   Content modes (Profiles C, L, M) for color and grayscale fax. These
   modes or profiles correspond to the content of the applicable ITU-T
   Recommendations. Files formatted according to this specification use
   the image/tiff MIME Content Type.

McIntyre, et. al.           Standards Track                     [Page 1]
RFC 2301              File Format for Internet Fax            March 1998

Table of Contents

1. INTRODUCTION........................................................4
   1.1. Scope..........................................................5
   1.2. Approach.......................................................5
   1.3. Overview of this draft.........................................5
2. TIFF and Fax........................................................7
   2.1. TIFF Overview..................................................7
     2.1.1. File Structure.............................................7
     2.1.2. Image Structure............................................9
     2.1.3. TIFF File Structure for Fax Applications..................10
   2.2 TIFF Fields for All Fax Applications...........................11
     2.2.1. TIFF Fields required for all fax modes....................12
     2.2.2. Additional TIFF Fields required for all fax modes.........13
     2.2.3. TIFF Fields recommended for all fax modes.................15
     2.2.4. New TIFF Fields recommended for fax modes.................16
3. Minimal Black-and-White Fax Mode...................................18
   3.1. Overview......................................................18
   3.2. Required TIFF Fields..........................................18
     3.2.1 Baseline Fields............................................18
     3.2.2 Extension Fields...........................................20
     3.2.3 New Fields.................................................20
   3.3. Recommended TIFF Fields.......................................20
   3.4. End of Line (EOL) and Return to Control (RTC).................20
     3.4.1 RTC Exclusion..............................................21
   3.5. File Structure................................................22
   3.6. Minimal Black-and-White Mode Summary..........................23
4. Extended Black-and-White Fax Mode..................................24
   4.1. TIFF-F Overview...............................................25
   4.2. Required TIFF Fields..........................................26
     4.2.1. Baseline Fields...........................................26
     4.2.2. Extension Fields..........................................28
     4.2.3. New Fields................................................29
   4.3. Recommended TIFF Fields.......................................29
     4.3.1. Baseline Fields...........................................29
     4.3.2. Extension Fields..........................................29
     4.3.3. New Fields................................................29
   4.4. Technical Implementation Issues...............................30
     4.4.1. Strips....................................................30
     4.4.2. Bit Order.................................................31
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