RFC 2301 (rfc2301) - Page 2 of 77

File Format for Internet Fax

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
     4.4.3. Multi-Page................................................31
     4.4.4. Compression...............................................31
     4.4.5. Example Use of Page-quality Fields........................32
     4.4.6. Practical Guidelines for Writing and Reading Multi-Page
            TIFF-F Files..............................................33
     4.4.7. Use of TIFF-F for Streaming Applications..................34
   4.5. Implementation Warnings.......................................34
     4.5.1. Uncompressed Data.........................................34



McIntyre, et. al.           Standards Track