Cisco Cisco IPICS Release 2.1 Licensing Information

642-4900, or from Global Engineering Documents at (800) 854-7179.  (ANSI

doesn't take credit card orders, but Global does.)  It's not cheap: as of

1992, ANSI was charging $95 for Part 1 and $47 for Part 2, plus 7%

shipping/handling.  The standard is divided into two parts, Part 1 being the

actual specification, while Part 2 covers compliance testing methods.  Part 1

is titled "Digital Compression and Coding of Continuous-tone Still Images,

Part 1: Requirements and guidelines" and has document numbers ISO/IEC IS

10918-1, ITU-T T.81.  Part 2 is titled "Digital Compression and Coding of

Continuous-tone Still Images, Part 2: Compliance testing" and has document

numbers ISO/IEC IS 10918-2, ITU-T T.83.

 

Some extensions to the original JPEG standard are defined in JPEG Part 3,

a newer ISO standard numbered ISO/IEC IS 10918-3 and ITU-T T.84.  IJG

currently does not support any Part 3 extensions.

 

The JPEG standard does not specify all details of an interchangeable file

format.  For the omitted details we follow the "JFIF" conventions, revision

1.02.  A copy of the JFIF spec is available from:

Literature Department

C-Cube Microsystems, Inc.

1778 McCarthy Blvd.

Milpitas, CA 95035

phone (408) 944-6300,  fax (408) 944-6314

A PostScript version of this document is available by FTP at

ftp://ftp.uu.net/graphics/jpeg/jfif.ps.gz.  There is also a plain text

version at ftp://ftp.uu.net/graphics/jpeg/jfif.txt.gz, but it is missing

the figures.

 

The TIFF 6.0 file format specification can be obtained by FTP from

ftp://ftp.sgi.com/graphics/tiff/TIFF6.ps.gz.  The JPEG incorporation scheme

found in the TIFF 6.0 spec of 3-June-92 has a number of serious problems.

IJG does not recommend use of the TIFF 6.0 design (TIFF Compression tag 6).

Instead, we recommend the JPEG design proposed by TIFF Technical Note #2

(Compression tag 7).  Copies of this Note can be obtained from ftp.sgi.com or

from ftp://ftp.uu.net/graphics/jpeg/.  It is expected that the next revision

of the TIFF spec will replace the 6.0 JPEG design with the Note's design.

Although IJG's own code does not support TIFF/JPEG, the free libtiff library

uses our library to implement TIFF/JPEG per the Note.  libtiff is available

from ftp://ftp.sgi.com/graphics/tiff/.

 

 

ARCHIVE LOCATIONS

=================

 

The "official" archive site for this software is ftp.uu.net (Internet

address 192.48.96.9).  The most recent released version can always be found

there in directory graphics/jpeg.  This particular version will be archived

as ftp://ftp.uu.net/graphics/jpeg/jpegsrc.v6b.tar.gz.  If you don't have