Tag Image File Format (TIFF) - F Profile for Facsimile (RFC2306)
Original Publication Date: 1998-Mar-01
Included in the Prior Art Database: 2019-Feb-15
Internet Society Requests For Comment (RFCs)
G. Parsons: AUTHOR [+1]
This document describes in detail the definition of TIFF-F that is used to store facsimile images. This memo provides information for the Internet community. It does not specify an Internet standard of any kind.
Network Working Group G. Parsons Request for Comments: 2306 Northern Telecom Category: Informational J. Rafferty Human Communications March 1998
Tag Image File Format (TIFF) - F Profile for Facsimile
Status of this Memo
This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.
Copyright (C) The Internet Society (1998). All Rights Reserved.
This document describes in detail the definition of TIFF-F that is used to store facsimile images. The TIFF-F encoding has been folklore with no standard reference definition before this document.
Internet Fax Working Group
This document is a product of the IETF Internet Fax Working Group. All comments on this document should be forwarded to the email distribution list at <firstname.lastname@example.org>.
This document references the Tag Image File Format (TIFF) to define the F profile of TIFF for facsimile (TIFF-F) as a file format that may be used for the storage and interchange of facsimile images.
2. TIFF Definition
TIFF (Tag Image File Format) Revision 6.0 is defined in detail within [TIFF].
A brief review of concepts used in TIFF is included in this document as background information, but the reader is directed to the original TIFF specification [TIFF] to obtain specific technical details.
Parsons & Rafferty Informational [Page 1]
RFC 2306 TIFF-F Profile March 1998
2.1 Baseline TIFF and Applications
TIFF provides a method to describe and store raster image data. A primary goal of TIFF is to provide a rich environment within which implementations can exchange image data. [TIFF] characterizes Baseline TIFF as being the core of TIFF, the essentials that all mainstream TIFF developers should support in their products. Applications of TIFF are defined by using Baseline TIFF as a starting point and then defining "extensions" to TIFF that are used for the specific "application", as well as specifying any other differences from Baseline TIFF.
3. TIFF-F Definition
Though it has been in common usage for many years, TIFF-F has previously never been documented in the form of a standard. An informal TIFF-F document was originally created by a small group of fax experts led by Joe Campbell. The existence of TIFF-F is noted in [TIFF] but it is not defined. This document defines the F application of [TIFF]. For ease of reference, the term TIFF-F will be used throughout this document as a shorthand for "F Profile of TIFF for Facsimile". TIFF-F files are intended for use with the image/tiff MIME media content-type which includes support for the "application" parameter (e.g., application=faxbw).
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [REQ].
3.1.1 TIFF-F Historical Background
Up until TIFF 6.0, TIFF supported various "Classes" which defined the ...