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Diffstat (limited to 'doc/patent_summary')
| -rw-r--r-- | doc/patent_summary | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/doc/patent_summary b/doc/patent_summary index 271f227c..324fec0d 100644 --- a/doc/patent_summary +++ b/doc/patent_summary @@ -48,12 +48,27 @@ do their JPEG work via a JPEG library not distributed with Netpbm. Your JPEG-related liability for using Netpbm is limited to your liability for using your JPEG library. +Note that it is possible to use Ppmtompeg without involving JPEG and to +build it without the ability to involve JPEG. + The next best alternative to JPEG is probably PNG and maybe JBIG for bilevel (black and white) images. http://burnalljpegs.org contains information on this issue. +MPEG patents +------------ + +The original University of California distributeion of the Ppmtompeg code +conatins this statement in a README file: + + ... patents are held by several companies on various aspects of the MPEG + video standard. Companies or individuals who want to develop commercial + products that include this code must acquire licenses from these companies. + For information on licensing, see Appendix F in the standard. + + Expired LZW patents ------------------- |