Cisco Cisco StadiumVision Director 라이센스 정보

 
ansi2knr.c is included in this distribution by permission of L. Peter 
Deutsch, 
sole proprietor of its copyright holder, Aladdin Enterprises of Menlo Park, 
CA. 
ansi2knr.c is NOT covered by the above copyright and conditions, but instead 
by the usual distribution terms of the Free Software Foundation; principally, 
that you must include source code if you redistribute it.  (See the file 
ansi2knr.c for full details.)  However, since ansi2knr.c is not needed as 
part 
of any program generated from the IJG code, this does not limit you more than 
the foregoing paragraphs do. 
 
The Unix configuration script "configure" was produced with GNU Autoconf. 
It is copyright by the Free Software Foundation but is freely distributable. 
The same holds for its supporting scripts (config.guess, config.sub, 
ltconfig, ltmain.sh).  Another support script, install-sh, is copyright 
by M.I.T. but is also freely distributable. 
 
It appears that the arithmetic coding option of the JPEG spec is covered by 
patents owned by IBM, AT&T, and Mitsubishi.  Hence arithmetic coding cannot 
legally be used without obtaining one or more licenses.  For this reason, 
support for arithmetic coding has been removed from the free JPEG software. 
(Since arithmetic coding provides only a marginal gain over the unpatented 
Huffman mode, it is unlikely that very many implementations will support it.) 
So far as we are aware, there are no patent restrictions on the remaining 
code. 
 
The IJG distribution formerly included code to read and write GIF files. 
To avoid entanglement with the Unisys LZW patent, GIF reading support has 
been removed altogether, and the GIF writer has been simplified to produce 
"uncompressed GIFs".  This technique does not use the LZW algorithm; the 
resulting GIF files are larger than usual, but are readable by all standard 
GIF decoders. 
 
We are required to state that 
    "The Graphics Interchange Format(c) is the Copyright property of 
    CompuServe Incorporated.  GIF(sm) is a Service Mark property of 
    CompuServe Incorporated." 
 
 
REFERENCES 
========== 
 
We highly recommend reading one or more of these references before trying to 
understand the innards of the JPEG software. 
 
The best short technical introduction to the JPEG compression algorithm is 
 

Wallace, Gregory K.  "The JPEG Still Picture Compression Standard", 

 

Communications of the ACM, April 1991 (vol. 34 no. 4), pp. 30-44. 

(Adjacent articles in that issue discuss MPEG motion picture compression, 
applications of JPEG, and related topics.)  If you don't have the CACM issue 
handy, a PostScript file containing a revised version of Wallace's article is 
available at ftp://ftp.uu.net/graphics/jpeg/wallace.ps.gz.  The file 
(actually 
a preprint for an article that appeared in IEEE Trans. Consumer Electronics) 
omits the sample images that appeared in CACM, but it includes corrections