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Interview with Don Marti
mpawlo writes "I just picked Don Marti's brain in a short interview published by Greplaw. Don Marti is the editor of LinuxJournal and the mastermind behind the Burnallgifs campaign. He has strong views on free software, software patentability and the freedom of the Internet. Marti should personally be featured in any encyclopedia under 'geektivism' and the brief interview may be of interest to Slashdotters not yet familiar with Mr Marti."
The LZW compression algorithm is patented. This is used in, for example, UNIX compress. In response to this, GNU wrote gzip for compression. GIF images also use the LZW algorithm.
Unisys owns licensing rights to the LZW patent. They typically go to web site operators (large ones), and ask them to pay licensing fees, or prove that all the GIFs they serve came from licensed programs. Kinda creepy. Of course, none of the enforcement came until GIFs were widely used.
In response, a group of open source hackers wrote the png spec, which uses the gzip compression technique. Also, postscript and pdf added gzip compression (flate compression) in addition to LZW compression, so that people could make pdfs without worrying about patent licensing.
The GIF patent will expire in less than a year, I think. It is still WIDELY used. However, development has continued at full speed on png formats, and has halted on GIFs. Even when they become legal, the next generation of software will use pngs instead (because the DEVELOPMENT stopped, not because it "used to be patented").