Cisco Cisco StadiumVision Director Informazioni sulle licenze

paper copy through ISO or ITU.  (Unless you feel a need to own a certified 

official copy, we recommend buying the Pennebaker and Mitchell book instead; 

it's much cheaper and includes a great deal of useful explanatory material.) 

In the USA, copies of the standard may be ordered from ANSI Sales at (212) 

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 

direct Internet access, UUNET's archives are also available via UUCP; contact 

help@uunet.uu.net for information on retrieving files that way. 

 

Numerous Internet sites maintain copies of the UUNET files.  However, only 

ftp.uu.net is guaranteed to have the latest official version.